gnpx20241231_10k.htm

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 2024

For the transition period from to

Commission File Number 001-38244

Genprex, Inc.

(Exact Name of Registrant as Specified in Its Charter)

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: (877) 774-4679

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, par value $0.001 per share GNPX The Nasdaq Capital Market

Securities registered pursuant to 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐ No ☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes ☐ No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☐ Accelerated filer ☐

Non-accelerated filer ☒ Smaller reporting company ☒

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to § 240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ☒

The aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant, computed by reference to the closing price of the registrant’s common stock on June 28, 2024 (the last business day of the registrant’s most recently completed second fiscal quarter), as reported by The Nasdaq Capital Market on such date, was approximately $4.8 million. This calculation does not reflect a determination that certain persons are affiliates of the registrant for any other purpose.

As of March 28, 2025, there were 24,152,848 shares of the registrant’s common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE: None.

TABLE OF CONTENTS

Page

PART I 2

Item 1. Business 2

Item 1A. Risk Factors 51

Item 1B. Unresolved Staff Comments 81

Item 1C. Cybersecurity 81

Item 2. Properties 81

Item 3. Legal Proceedings 81

Item 4. Mine Safety Disclosures 81

Item 6. [Reserved] 82

Item 7A. Quantitative and Qualitative Disclosures About Market Risk 90

Item 8. Financial Statements and Supplementary Data 90

Item 9A. Controls and Procedures 91

Item 9B. Other Information 93

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections 93

PART III 94

Item 10. Directors, Executive Officers and Corporate Governance 94

Item 11. Executive Compensation 99

Item 14. Principal Accountant Fees and Services 111

Item 15. Exhibits and Financial Statement Schedules 112

FINANCIAL STATEMENTS F-1

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS AND INDUSTRY DATA

This Annual Report on Form 10-K (this “Annual Report on Form 10-K” or this “Annual Report”) contains forward-looking statements that involve substantial risks and uncertainties which are made pursuant to the safe harbor provisions of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Unless the context requires otherwise, references to “Genprex,” the “Company,” “we,” “us” or “our” in this Annual Report refer to Genprex, Inc. Any statements in this Annual Report about our expectations, beliefs, plans, objectives, assumptions or future events or performance are not historical facts and are forward-looking statements. These statements are often, but not always, made through the use of words or phrases such as “believe,” “will,” “expect,” “anticipate,” “estimate,” “intend,” “plan,” “would,” and similar expressions. For example, statements concerning financial condition, possible or assumed future results of operations, growth opportunities, industry ranking, plans and objectives of management, markets for our common stock and future management and organizational structure and statements about our current or future product candidates and their development, our beliefs regarding their preclinical or clinical profile or efficacy, and the regulatory approval process and pathway and the timing thereof, are all forward-looking statements. Forward-looking statements are not guarantees of performance. They involve known and unknown risks, uncertainties and assumptions that may cause actual results, levels of activity, performance or achievements to differ materially from any results, levels of activity, performance or achievements expressed or implied by any forward-looking statement.

Any forward-looking statements are qualified in their entirety by reference to the risk factors discussed throughout this Annual Report, including the risk factors described in Item 1A of this Annual Report. Some of the risks, uncertainties and assumptions that could cause actual results to differ materially from estimates or projections contained in the forward-looking statements include but are not limited to:

• Market conditions;

• Our capital position;

• Our ability to continue as a going concern;

• Our uncertainty of developing marketable products;

• Our ability to develop and commercialize our products;

• Our ability to obtain regulatory approvals;

• Our ability to control product development costs;

• Our ability to attract and retain key employees;

• The possibility that there may be no market acceptance for our products; and

The foregoing list sets forth some, but not all, of the factors that could affect our ability to achieve results described in any forward-looking statements, which speak only as of the date of this Annual Report or the date of the document incorporated by reference into this Annual Report. Except as required by law, we assume no obligation and expressly disclaim any duty to update any forward-looking statement to reflect events or circumstances after the date of this Annual Report or to reflect the occurrence of unanticipated events. In addition, we cannot assess the impact of each factor on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements contained in this Annual Report. All forward-looking statements are expressly qualified in their entirety by the cautionary statements contained in this section.

PART I

Item 1. Business.

Overview

We are a clinical stage gene therapy company pioneering the development of gene-based therapies for large patient populations with unmet medical needs. Our oncology platform utilizes our systemic, non-viral ONCOPREX® Delivery System which uses lipid-based nanoparticles in a lipoplex form to deliver tumor suppressor gene-expressing plasmids to cancer cells. The product is administered intravenously, where it is taken up by tumor cells that then express tumor suppressor proteins that were deficient in the tumor. Our diabetes technology is designed to work in Type 1 diabetes by transforming alpha cells in the pancreas into functional beta-like cells, which can produce insulin but may be distinct enough from beta cells to evade the body’s immune system. In Type 2 diabetes, our technology is believed to work by replenishing and rejuvenating exhausted beta cells that make insulin.

Oncology Platform

Our lead oncology drug candidate, REQORSA® gene therapy (generic name: quaratusugene ozeplasmid), previously referred to as GPX-001, is initially being developed in combination with prominent, approved cancer drugs to treat Non-Small Cell Lung Cancer (“NSCLC”) and Small Cell Lung Cancer (“SCLC”). REQORSA has multimodal effects on cancer cells. It harms the metabolism of cancer cells, which leads to reduced cancer cell growth. It has a mechanism of action whereby it decreases tumor glucose metabolism, interrupts cell signaling pathways that cause replication and proliferation of cancer cells, re-establishes pathways for apoptosis, or programmed cell death, in cancer cells, and increases the immune response against cancer cells. In preclinical studies, REQORSA has been shown to be complementary with targeted drugs and immunotherapies. Our strategy is to develop REQORSA in combination with currently approved therapies and we believe REQORSA’s unique attributes position it to provide treatments that improve on these current therapies for patients with NSCLC, SCLC, and possibly other cancers.

The TUSC2 gene, which is the key component of REQORSA and plays a vital role in cancer suppression and normal cell metabolism, is one of a series of genes on the short arm of Chromosome 3 whose therapeutic use is covered by our exclusive worldwide licenses from The University of Texas MD Anderson Cancer Center (“MD Anderson”). We believe that our ONCOPREX Delivery System allows for the delivery of a number of cancer-fighting tumor suppressor genes, alone or in combination with other cancer therapies, to combat multiple types of cancer and we are in early stages of discovery programs to identify other cancer candidates. In August 2022, we entered into a three-year sponsored research agreement with MD Anderson to support further preclinical studies of TUSC2 and other tumor suppressor genes. Additionally, we are collaborating with MD Anderson to discover, develop and utilize biomarkers to select the patient population most likely to respond to REQORSA and enable decisions on progression of our drug candidates to the next phase of development. MD Anderson is currently analyzing biomarkers that would indicate lack of response in lung cancer that could enrich our population of responders in our clinical trials and enhance patient screening and enrollment in order to increase the likelihood of potential success of the Acclaim studies for the Company.

Acclaim – 1: We currently are enrolling and treating patients in the Phase 2a expansion portion of our Phase 1/2 Acclaim-1 clinical trial. The Acclaim-1 trial uses a combination of REQORSA and AstraZeneca’s Tagrisso® (osimertinib) in patients with late-stage NSCLC that has activating epidermal growth factor receptor (“EGFR”) mutations and progression on treatment with Tagrisso or Tagrisso-containing regimens. Following the May 2023 completion of the Phase 1 dose escalation portion of the study, the Acclaim-1 Safety Review Committee (“Acclaim-1 SRC”) approved advancement from the Phase 1 dose escalation portion to the Phase 2a expansion portion of the study. Based on a review of safety data which showed no dose limiting toxicities (“DLTs”), the Acclaim-1 SRC determined the recommended Phase 2 dose (“RP2D”) of REQORSA to be 0.12 mg/kg. This was the highest dose level delivered in the Phase 1 portion of the study and is twice the highest dose level delivered in our prior clinical trial combining REQORSA with Tarceva® (erlotinib) for the treatment of late-stage lung cancer. There were three patients originally enrolled in the Phase 1 dose escalation portion of the study who had prolonged progression-free survival (“PFS”). One patient attained a partial remission after the second course of REQORSA and Tagrisso and has maintained this response through 47 courses of treatment (approximately 35 months) and continues to receive REQORSA and Tagrisso treatment to date. A second patient had stable disease without disease progression through 32 courses of treatment (approximately 24 months) but recently had disease progression and is no longer receiving treatment. We opened the Phase 2a expansion portion of the study and enrolled and dosed the first patient in January 2024. The initial trial design of the Phase 2a expansion portion of the study included two cohorts with half being patients who received only prior Tagrisso treatment and the other half being patients who received prior Tagrisso treatment and chemotherapy. However, as previously announced in August 2024, based on resource prioritization and to focus on the patients for whom REQORSA is most likely to show a benefit, we decided to limit our enrollment efforts moving forward to patients who received only prior Tagrisso treatment and cease enrollment of the second cohort (patients who received prior Tagrisso treatment and chemotherapy). However, noting that both of the patients with prolonged PFS in the Phase 1 portion of the study had previously received both chemotherapy and Tagrisso, in February 2025, we amended the protocol to allow entry of patients progressing on Tagrisso or Tagrisso-containing regimens. The Phase 2a expansion portion of the trial is now expected to enroll approximately 33 patients; all of whom have progressed on Tagrisso or Tagrisso-containing regimens. The Phase 2b randomized portion of the study, in which patients progressing on prior Tagrisso treatment will be randomized 1:1 to either REQORSA and Tagrisso combination therapy or to platinum-based chemotherapy, will remain unchanged. There will be an interim analysis following the treatment of 19 patients in the Phase 2a portion of the Acclaim-1 study. We expect to complete the enrollment of the first 19 patients for interim analysis in the Phase 2a expansion portion of the study by the end of 2025 and expect the interim analysis in the first half of 2026.

The Food and Drug Administration (“FDA”) has granted Fast Track Designation for the Acclaim-1 treatment combination of REQORSA and Tagrisso in NSCLC patients who have progressed on Tagrisso treatment.

The Phase 2a expansion portion of the Acclaim-1 study provides us the advantage of early insight into drug effectiveness in defined and distinct patient populations at the maximum tolerated dose (the “MTD”) or RP2D in order to better evaluate efficacy and increase the likelihood of a successful randomized Phase 2 trial which will follow the expansion portion of the study.

Acclaim – 2: The Acclaim-2 trial involved a combination of REQORSA and Merck & Co.’s Keytruda® (pembrolizumab) in patients with late-stage NSCLC whose disease has progressed after treatment with Keytruda. As previously announced in August 2024, based on a number of factors, including enrollment challenges and delays due to competition for investigators and eligible patients with numerous other trials involving the same patient population, we decided to cease enrollment of new patients in the Acclaim-2 trial to prioritize our resources and focus on the other two Acclaim trials in SCLC and NSCLC, respectively. There are no longer any patients receiving study treatment in the Acclaim-2 trial. Although the Acclaim-2 study in patients progressing on Keytruda containing regimens has been closed due to, among other factors, slow enrollment, we continue to believe that this combination could be beneficial.

Acclaim – 3: We are currently enrolling and treating patients in the Phase 2 expansion portion of our Phase 1/2 Acclaim-3 clinical trial. The Acclaim-3 clinical trial uses a combination of REQORSA and Genentech, Inc.’s Tecentriq® (atezolizumab) as maintenance therapy for patients with extensive stage small cell lung cancer (“ES-SCLC”) who developed tumor progression after receiving Tecentriq and chemotherapy as initial standard treatment. Patients are treated with REQORSA and Tecentriq until disease progression or unacceptable toxicity is experienced. On December 16, 2024, we announced that we had completed the Phase 1 dose escalation portion of the Acclaim-3 clinical trial. Based on full safety data, which showed no DLTs, the Acclaim-3 Safety Review Committee (“Acclaim-3 SRC”) determined that the RP2D of REQORSA will be 0.12 mg/kg, which was the highest dose level delivered in the Phase 1 portion of the trial, and approved the opening of the Phase 2 expansion portion of the trial. We anticipate that the Phase 2 expansion portion will enroll approximately 50 patients at approximately 10 to 15 U.S sites. Patients will be treated with REQORSA and Tecentriq until disease progression or unacceptable toxicity is experienced. The primary endpoint of the Phase 2 portion is to determine the 18-week progression-free survival rate from the time of the start of maintenance therapy with REQORSA and Tecentriq in patients with ES-SCLC. Patients will also be followed for survival. A Phase 2 futility analysis will be performed after the 25th patient enrolled and treated reaches 18 weeks of follow up. We expect to complete enrollment of the first 25 patients for interim analysis in the Phase 2 expansion portion of the study in the second half of 2025.

The Acclaim-3 clinical trial has received FDA Fast Track Designation for this patient population and Acclaim-3 has also received an FDA Orphan Drug Designation.

Diabetes Gene Therapy

In diabetes, we have exclusively licensed from the University of Pittsburgh of the Commonwealth System of Higher Education (“University of Pittsburgh” or “UP”) multiple technologies relating to the development of a gene therapy product for each of Type 1 and Type 2 diabetes. The same general novel approach is used in each of Type 1 and Type 2 diabetes whereby an adeno-associated virus (“AAV”) vector containing the Pdx1 and MafA genes is administered directly into the pancreatic duct. In humans, this can be done with a routine endoscopy procedure. Our diabetes product candidates are currently being evaluated and optimized in preclinical studies at the University of Pittsburgh. GPX-002 is being developed using the same construct for the treatment of both Type 1 diabetes and Type 2 diabetes. GPX-002 for Type 1 diabetes is designed to work by transforming alpha cells in the pancreas into functional beta-like cells, which can produce insulin but may be distinct enough from beta cells to evade the body’s immune system. In a similar approach, GPX-002 for Type 2 diabetes (formerly known as GPX-003), where autoimmunity is not at play, is believed to work by replenishing and rejuvenating exhausted beta cells that make insulin. We finalized the components of the diabetes construct to take forward for nonclinical studies and in December 2023, we submitted a request to meet with the FDA to obtain their guidance on the nonclinical studies needed to file an Investigational New Drug (“IND”) application and initiate first-in-human studies. As a result of the FDA’s response, we decided to continue with our planned additional nonclinical studies before requesting regulatory guidance for the IND-enabling studies. We are currently working with the University of Pittsburgh on species analyses for the animal models as well as on other regulatory and clinical strategic planning, including the planned initiation of research in Type 2 diabetes animal models, following which we believe we would be poised to seek further regulatory guidance from the FDA on IND-enabling studies in the second half of 2025. In October 2023, we entered into a one-year extension to our August 2022 sponsored research agreement with UP for the use of GPX-002 in a non-human primate (“NHP”) model in Type 2 diabetes. The extension includes a revised research plan to encompass our most recent technologies to which we originally acquired exclusive rights from UP in July 2023 as amended and restated in the comprehensive New UP License Agreement in February 2025 (as defined and described below). These include a MafB promoter to drive expression of the Pdx1 and MafA transcription factors that can potentially be used for both Type 1 and Type 2 diabetes. See also “Note 7 – Commitments and Contingencies” to our financial statements included in this Annual Report on Form 10-K. In February 2023, the Company’s research collaborators at UP presented preclinical data in a NHP model of Type 1 diabetes highlighting the therapeutic potential of GPX-002 at the 16th International Conference on Advanced Technologies & Treatments for Diabetes (ATTD 2023) in Berlin, Germany. The statistically significant study results showed the treated animals had decreased insulin requirements, increased c-peptide levels, and improved glucose tolerance compared to baseline. In April 2023, the Company hosted a Key Opinion Leader virtual event entitled “Novel Gene Therapy to Treat Type 1 Diabetes,” which discussed preclinical data reported at ATTD 2023 supporting gene therapy to treat Type 1 diabetes. The Company has also initiated research on a non-viral lipid nanoparticle delivery system that would allow a patient to receive multiple treatments.

Reverse Stock Split

Effective as of 12:01 a.m. Eastern Time on February 2, 2024, we effected a reverse stock split of our Common Stock at a ratio of one-for-forty (1:40) (the “Reverse Stock Split). Our Common Stock continues to trade on The Nasdaq Capital Market under the same GNPX ticker following the Reverse Stock Split, but has been assigned a new CUSIP number, 372446-203. All share and per share amounts in this Annual Report on Form 10-K have been adjusted as appropriate to reflect the Reverse Stock Split.

Recent Developments

At-the-Market Offering Program

On December 13, 2023, we entered into an At The Market (“ATM”) Offering Agreement (the “ATM Agreement”) with H.C. Wainwright & Co., LLC, serving as agent (the “Agent”) with respect to an ATM offering program under which we may offer and sell through the Agent, from time to time at our sole discretion, up to such number or dollar amount of shares (the “Shares”) of our common stock, par value $0.001 per share (the “Common Stock”), as registered on the prospectus supplement covering the ATM offering, as may be amended or supplemented from time to time. We have agreed to pay the Agent a commission equal to three percent (3%) of the gross sales proceeds of any Shares sold through the Agent under the ATM Agreement, and also have provided the Agent with customary indemnification and contribution rights. During the year ended December 31, 2024, we sold 7,684,953 Shares through the Agent under the ATM Agreement for net proceeds to us of approximately $6.1 million. From January 1, 2025 through the date of filing of this Annual Report on Form 10-K, we have sold 13,278,666 shares of our common stock for net proceeds to us totaling $6,028,104 through the Agent under the ATM Agreement.

New UP License Agreement

On February 17, 2025, the Company and the University of Pittsburgh entered into an amended and restated Exclusive License Agreement (the “New UP License Agreement”), which updates and consolidates into a single agreement the Prior License Agreements (as defined below). Pursuant to the New UP License Agreement, UP granted to Genprex a worldwide, exclusive license for certain patents and related technology, collectively referred to as the “Licensed Technology,” and a worldwide, non-exclusive license to use certain related know-how. The Licensed Technology covered by the New UP License Agreement is based on the same general gene therapy approach as covered under the Prior License Agreements (less the previously-licensed macrophage technology), whereby an adeno-associated virus vector containing the Pdx1 and MafA genes is administered directly into the pancreatic duct. More specifically, the Licensed Technology covered by the New UP License Agreement is related to a gene therapy for both Type 1 diabetes and Type 2 diabetes using the genes of the Pdx1 and MafA transcription factors controlled by insulin, glucagon and MafB promoters.

Convergen Biotech, Inc.

Additionally, in September 2024, we announced that we were considering various strategic alternatives and opportunities to enhance stockholder value, including evaluating ways to optimize our clinical and research programs and operational strategies, such as our intention to potentially transfer our diabetes clinical development program and our diabetes gene therapy assets into a new, initially wholly-owned subsidiary. In connection with this intended separation of the diabetes clinical development program, on February 18, 2025, we announced that we had formed a wholly-owned subsidiary, Convergen Biotech, Inc. (“Convergen”), to implement this initial step of the reorganization and facilitate the separation of the diabetes program. Convergen will focus on developing and commercializing GPX-002. The Company will retain its oncology clinical development programs and other oncology pipeline assets.

Our Pipeline

Our technologies are designed to administer disease-fighting genes to provide new therapies for large patient populations with cancer and diabetes who currently have limited treatment options. We are developing our lead oncology product candidate REQORSA to be administered with targeted therapies and with immunotherapies for NSCLC and SCLC. We continue to conduct preclinical research to explore how REQORSA may be administered with targeted therapies and immunotherapies in other solid tumors, such as ALK-positive NSCLC, NSCLC progressing after rat sarcoma virus (“RAS”) inhibitors, mesotheliomas, and gliomas, and we are researching how other cancer fighting genes, such as NPRL2, can enhance our portfolio using our systemic, non-viral gene therapy platform, the ONCOPREX DeliverySystem. Using a different gene therapy delivery system, we are also developing our preclinical diabetes candidate GPX-002 using the same construct for both Type 1 diabetes and Type 2 diabetes. The following table summarizes our product development pipeline.

Introduction – Cancer

Cancer and Genetic Mutations. Cancer results from genetic mutations. Mutations that lead to cancer are usually present in two major classes of genes: oncogenes, which are involved in functions such as signal transduction and transcription; and tumor suppressor genes, which play multiple roles in governing cell growth and proliferation. Transduction is the process by which chemical and physical signals are transmitted into cells. In cancer cells, the oncogene mutations may overwhelm the natural tumor suppression processes, or those tumor suppression processes may be impaired or absent. Functional alterations due to mutations in oncogenes or tumor suppressor genes may result in the abnormal and uncontrolled growth patterns characteristic of cancer. These genetic alterations facilitate malignant growth by affecting signal transduction pathways and transcription, such as inhibiting normal growth signaling in the cell, circumventing the natural process of apoptosis, evading the immune system’s response to cancer, and inducing angiogenesis, which is the formation of new blood vessels that supply cancer cells.

Common genetic alterations present in lung cancer are in tumor suppressor genes. Although some tumor suppressor genes develop mutations in cancer, the TUSC2 tumor suppressor gene is often deleted in cancers. To the Company’s knowledge, no targeted small molecule drugs have successfully been developed to compensate for tumor suppressor gene changes in NSCLC or SCLC.

Another genetic condition often associated with lung cancer is the presence of mutations of tyrosine kinases. Tyrosine kinases are enzymes that play an important role in signal transduction through the modification of proteins by adding phosphate groups (phosphorylation) onto the amino acid tyrosine, to change the proteins’ function. When an EGFR ligand binds to the EGFR, two EGFR transmembrane proteins are brought close together on the cell membrane surface, and the intracellular tyrosine kinase domains can autophosphorylate, and activate downstream processes, including cell signaling pathways that can lead to cell growth and proliferation. EGFRs can act similarly to a switch that turns “on” and “off” when phosphate groups are either added or taken away. Mutated kinases can have a malfunctioning on/off switch, causing the switch to be stuck in the “on” position leading to the loss of control of cell growth.

Cancer and the Immune System. Cancer can also spread when the body’s natural immune functions are impaired, including by the cancer cells themselves. PD-1, or Programmed Death-1, is a receptor expressed on the surface of activated T cells, which are part of the body’s immune system. PD-L1 is a ligand for PD-1 which is expressed on the surface of cancer and other cells. The binding of PD-1 to PD-L1 has been shown to contribute to cancer cells’ ability to evade the body’s immune response. Antibodies to PD-1 and similar molecules are called immune checkpoint inhibitors because PD-1 and similar molecules can impede the normal immune response, for example by blocking the T cells from attacking the cancer cells. In many cancers, PD-L1 is up-regulated. Substantial research has been performed in the emerging field of immuno-oncology to discover drugs or antibodies that could block PD-1 and similar receptors. It is believed that blocking the PD-1/PD-L1 interaction pathway and other similar checkpoints, such as cytotoxic T-lymphocyte-associated protein 4, or CTLA-4, with drugs called checkpoint inhibitors, such as Keytruda or Tecentriq, can prevent cancer cells from inactivating T cells, leading to an attack of the immune system on the cancer.

Current Treatment of NSCLC. Chemotherapy is the standard treatment for the majority of NSCLC patients, as it is for many other cancer patients. Because it is a non-selective systemic treatment, rather than a targeted approach to treating cancer, chemotherapy also kills healthy cells and has a number of other undesirable side effects.

A subset of NSCLC patients carry a mutation in EGFR, which makes their tumors sensitive to EGFR tyrosine kinase inhibitors (“EGFR TKIs”). The two most common mutations are referred to as exon 19 deletion and exon 21 substitution. Several pharmacological and biological approaches, including EGFR TKIs, have been developed specifically to block activated EGFR for cancer therapy. EGFR TKI drugs are the most common targeted therapies used in lung cancer. Several EGFR TKI therapies are marketed commercially including, but not limited to, Tagrisso, Tarceva, Iressa and Gilotrif.

Approximately 10% to 20% of NSCLC patients of North American and European descent and approximately 40% to 50% of NSCLC patients of Asian descent have activating EGFR mutations. This means that the majority of NSCLC patients do not have activating EGFR mutations and are therefore “EGFR negative” and not optimal candidates for EGFR TKIs.

In addition, even among those patients who are EGFR positive and benefit from EGFR TKI therapy, nearly all eventually become resistant to and ultimately no longer respond to EGFR TKI therapy, resulting in eventual disease progression. For example, according to the FLAURA study, sponsored by AstraZeneca, the median time to tumor progression for lung cancer patients on Tagrisso monotherapy is approximately 18 months. Furthermore, recent clinical trials have shown that combining EGFR TKIs with conventional chemotherapy increases progression free survival, as well as overall survival, for lung cancer patients with EGFR mutations compared to Tagrisso monotherapy.

Current Treatment of SCLC. SCLC is staged as limited stage, in which the cancer is only on one side of the chest and can be treated with a single radiation therapy field, or as extensive stage (“ES”), which includes all other patients. Since SCLC is an aggressive disease, the vast majority of patients have extensive stage SCLC at the time of initial diagnosis. The standard treatment for ES-SCLC for many years was a combination chemotherapy with carboplatin and etoposide for 4 cycles of treatment, as treatment with chemotherapy for longer duration or treatment including other agents was not shown to be beneficial. In the last several years the addition of immune checkpoint inhibitors has been shown to have improved efficacy when added to 4 cycles of chemotherapy. Thus, standard treatment now consists of either Tecentriq or Imfinzi added to 4 cycles of carboplatin and etoposide, and then Tecentriq or Imfinzi are continued as maintenance therapy until disease progression.

However, treatment of ES-SCLC is not curative, and patients progress quickly. In patients receiving Tecentriq and chemotherapy, the PFS after starting maintenance Tecentriq is only 2.6 months. Further improvements in the treatment of ES-SCLC are needed.

Epidemiology of Lung Cancer. According to the World Health Organization in 2023, lung cancer was the leading cause of cancer deaths worldwide. According to the American Cancer Society in 2025, lung cancer accounts for about one in five of all cancer deaths in the United States, and causes more deaths in the U.S. than colon, breast and prostate cancers combined. In 2020, there were more than 2 million new lung cancer cases and approximately 1.8 million deaths from lung cancer worldwide. In the U.S., according to the American Cancer Society, it is estimated that in 2025 there will be more than 226,000 new cases of lung cancer and more than 124,000 deaths from this disease. NSCLC represents about 82% of all lung cancers and the five-year survival rate for patients with NSCLC with distant spread is 9 percent. SCLC represents about 14% of lung cancer patients and the five-year survival rate for patients with SCLC with distant spread is 3 percent. With limited benefit from current therapies, we believe there is a significant unmet medical need for new treatments for NSCLC and SCLC in the U.S. and globally, and we believe REQORSA may be suitable for the majority of lung cancer patients.

REQORSA®

REQORSA® gene therapy (generic name: quaratusugene ozeplasmid) decreases tumor glucose metabolism, interrupts cell signaling pathways that cause replication and proliferation of cancer cells, targets and kills cancer cells, and stimulates the natural immune responses against cancer. It reexpresses TUSC2 protein in the cell, and also increases the anti-tumor immune cell population and down-regulates PD-L1, thereby potentially boosting the immune response to cancer.

REQORSA consists of a TUSC2 gene expressing plasmid encapsulated in non-viral lipid-based nanoparticles in a lipoplex form (our ONCOPREX Delivery System), which has a positive charge. REQORSA is designed to deliver the functioning TUSC2 gene to cancer cells while minimizing uptake by normal tissue. REQORSA is injected intravenously and specifically targets cancer cells. Cancer cells have elevated metabolism compared to healthy cells and as a result, are negatively charged compared to healthy cells, which are generally charge neutral. Thus, there is an electrostatic attraction of REQORSA to cancer cells. Cancers also have a leaky vasculature, so REQORSA leaks out of the blood vessels and can be taken up by cancer cells, which have a greater rate of pinocytosis (uptake of extracellular material) than normal cells. Laboratory studies conducted at MD Anderson show that the uptake of TUSC2 in tumor cells in vitro after REQORSA treatment was 10 to 33 times the uptake in normal cells. Biopsies in three patients with NSCLC treated with REQORSA show major increases in TUSC2 protein expression in the tumor cells one day after REQORSA administration. We believe that REQORSA is the first systemic gene therapy to be used for cancer in humans. Many other gene therapies require complex procedures, such as removal of cells from a patient and modification of those cells which are then reinfused into the patient, and many, unlike REQORSA, lead to permanent changes in a patient’s DNA.

Many approved cancer therapeutics target only single molecules or a single specific genetic abnormality related to driving the proliferation and survival of cancer cells. In contrast, REQORSA has been shown to have a multimodal mechanism of action whereby it decreases tumor glucose metabolism, interrupts cell signaling pathways that cause replication and proliferation of cancer cells, re-establishes pathways for programmed cell death (apoptosis) in cancer cells, and modulates the immune response against cancer cells. REQORSA also has been shown to be complementary with a number of targeted drugs and immunotherapies.

Resistance to targeted drugs and checkpoint inhibitors often develops through activation of alternate bypass pathways. For example, when PD-1 is blocked, the TIM-3 checkpoint is up-regulated. We believe that REQORSA’s multimodal activity will block emerging bypass pathways, thereby potentially reducing the probability that drug resistance develops.

Our preclinical and clinical data indicate that REQORSA is well tolerated and may be effective alone or in combination with targeted small molecule therapies. Preclinical data indicate that REQORSA may also be effective with immunotherapies, and in a three-drug combination with immunotherapy and chemotherapy. These data suggest that REQORSA, when combined with other therapies, may be effective in a large proportion of lung cancer patients.

TUSC2, the Tumor Suppressor Gene in REQORSA®

TUSC2 is a multifunctional gene that plays a vital role in cancer suppression and normal cell regulation, which is sometimes referred to as Fus1. Key TUSC2 anti-cancer mechanisms of action include decreasing tumor glucose metabolism, inactivation of multiple oncogenic kinases, the induction of apoptosis, the control of cell signaling and inflammation, and modulation of the immune system to fight cancer. REQORSA has been shown to be complementary with targeted drugs and immunotherapies. Our preclinical data indicate that REQORSA in combination with both EGFR TKIs and with immunotherapies can achieve results more favorable than results achieved with either REQORSA or such other therapies alone, and may make those drugs effective for patients with drug resistance who would not otherwise benefit from them.

Normal TUSC2 function is often inactivated early in cancer development, making TUSC2 a potential target for all stages of cancer, including metastatic disease. The TUSC2 protein is reduced or absent in approximately 82% of NSCLCs and in 100% of SCLCs. In patients with NSCLC, the loss of TUSC2 expression has been associated with significantly worse overall survival than when TUSC2 expression is not decreased.

Studies show TUSC2 protein functions as a key mediator in the Apaf1-mediated mitochondrial apoptosis pathway by recruiting and directing cytoplasmic Apaf1 protein to a critical cellular location and activating it in situ, thereby up-regulating activity of other proapoptotic effectors. TUSC2 functions to mediate apoptosis in cancer cells through interaction with Apaf1 and also down-regulates multiple tyrosine kinases that control cell growth, including EGFR, AKT, platelet-derived growth factor receptor (“PDGFR”), c-Kit, and c-Abl.

In normal cells, the proteins involved in the PI3K/AKT/mTOR pathway play an important role in cellular function and cellular trafficking. In this pathway, PI3K, a kinase, generates messenger molecules required to translocate AKT, another protein kinase, to the cell’s plasma membrane where it is phosphorylated and activated. These proteins are often found to be aberrantly active in cancers, causing cells to lose their ability to control cell growth, proliferation, and differentiation. Thus, mutations in PI3K and its upstream activators, such as EGFR, have been associated with many forms of cancers.

Similarly, proteins in the Ras/MAPK pathway, which is a signal transduction pathway that transduces signals to the cell nucleus where specific genes are activated for cell growth, division and differentiation, play a critical role in cellular responses to various stress stimuli, including osmotic stress, DNA damage, and inflammation. As shown in the figures below, the TUSC2 protein, a potent pan-kinase inhibitor, blocks multiple cell-signaling pathways downstream of the EGFR receptor and leads to cell cycle interruption, thereby preventing cancer cell proliferation and survival.

Under stress conditions, such as oncogenic stress, cells go through a regulated process of programmed cell death, also known as apoptosis. As illustrated in the schematic below, the TUSC2 protein interacts via various apoptotic signaling pathways such as Apa1 to stimulate programmed cell death via the release of caspases, enzymes that play a significant role in apoptosis.

Pan-Kinase Inhibition by TUSC2

Stimulation of Apoptotic Signaling by TUSC2

Our clinical and preclinical data indicate that the combination of REQORSA with EGFR TKIs, may increase anti-tumor activity in cancers with or without EGFR mutations and in cancers that have become resistant to EGFR TKI therapy, thus potentially expanding the number of patients who could benefit from those drugs.

TUSC2 and the Immune Response. In addition to its pro-apoptotic cytotoxicity and tyrosine kinase inhibitory activity, TUSC2 enhances the immune response to cancer. Data from preclinical studies at MD Anderson has shown a benefit from the combination of TUSC2 and anti-PD-1 antibody and a key role for TUSC2 in regulating immune cell subpopulations including cytokines, natural killer (“NK”) cells, and T lymphocytes. In addition, TUSC2 has been found to down-regulate PD-L1 on the surface of cancer cells. As a result, lymphocytes expressing the PD-1 receptor are more likely to recognize the cancer cell as an altered cell that should be destroyed. In addition, by inducing tumor cell apoptosis TUSC2 increases antigen release and presentation, thus promoting an enhanced antitumor response in the presence of other immune regulators.

NK cells, an important part of the innate immune system, have developed several mechanisms to distinguish healthy cells from target cells. These mechanisms allow NK cells to kill cells that are deemed dangerous to the host, including cancer cells. However, one of the consequences of malignant transformation is the ability of the cancer cell to evade the immune system. Cancer cells do so via the up-regulation and interplay of receptors, including checkpoint inhibitors such as PD-1 and PD-L1.

As shown in the illustration below, TUSC2 has been found to stimulate the release of interleukin-15, or IL-15, resulting in up-regulation of mature NK cells that circulate and target cancer cells.

Modulation by TUSC2 of the Immune Response to Cancer

In work presented in an abstract for the 2024 American Association of Cancer Research (AACR) meeting, our clinical collaborators have shown that TUSC2 has metabolic effects both in lung cancers and in normal cells. TUSC2 is encoded by the nuclear DNA, but the TUSC2 protein resides in the inner membrane of the mitochondria. TUSC2 has been shown to play a critical role in mitochondrial respiration/energy metabolism, reactive oxygen species production, and in Ca2+ flux to and from mitochondria. This recent work demonstrated that TUSC2 re-introduction to TUSC2-deficient cancer cells consistently suppressed both glycolysis and mitochondrial ATP production, thus leaving cells without sufficient energy to support their vital functions. This suggests that TUSC2 protein introduced to cancer cells lacking TUSC2 can decrease the high metabolic rate that is characteristic of cancer cells, leading to marked decreases in cell growth. The data also showed that both glycolytic and mitochondrial metabolism of a normal epithelial cell line were strengthened after the introduction of TUSC2, suggesting a beneficial role of TUSC2 for the metabolic health of normal cells. This suggests that TUSC2 effects on metabolism in normal lymphocytes could lead to the increased immune response to lung cancers seen in animal models receiving REQORSA. The study further suggested that REQORSA may play an important role as a cancer treatment to target and disrupt the metabolism of cancer cells, leading to a decrease in the rate of glycolysis.

REQORSA Decreases Glycolysis and ATP Production in A549 Lung Cancer Cells

ONCOPREX® Delivery System

Our oncology platform consists of DNA plasmids expressing tumor suppressor genes contained in non-viral lipid-based nanoparticles in a lipoplex form (“lipoplexes”) delivered intravenously. Lipoplexes (see figure below) have lipid-based nanoparticles that clump together, thus protecting the DNA between them from being destroyed in the bloodstream. REQORSA utilizes the ONCOPREX® Delivery System to encapsulate the TUSC2 gene in positively charged lipoplexes that are attracted to negatively charged cancer cells, and then enter the cancer cell through selective endocytosis, a process by which cells take in substances from outside the cell by engulfing them in a vesicle.

Operation of the ONCOPREX Delivery System

The cationic (positive) charge of the lipoplexes helps to target cancer cells, which have a slight negative charge due to their high glycolytic rate. A Phase 1 monotherapy clinical trial showed that intravenous REQORSA therapy selectively and preferentially targeted tumor cells, resulting in anticancer activity. The lipoplexes are non-immunogenic, allowing repetitive therapeutic dosing and providing extended half-life in the circulation.

The ONCOPREX Delivery System is a non-viral delivery system. Many gene therapies rely on viral based delivery systems. The benefit of the viral system is that viruses are skilled at penetrating cells. However, viruses can also affect more than one type of cell and it is possible that the virus may infect cells other than the targeted cells containing mutated genes. If this happens, healthy cells may be damaged causing other illness or diseases, and rarely can cause cancer if the virus integrates into the genes of the cell. Once REQORSA is taken up into a cancer cell, the TUSC2 gene is expressed and TUSC2 protein is capable of restoring certain defective functions in the cancer cell. REQORSA has been designed using the ONCOPREX Delivery System to deliver the functioning TUSC2 gene to cancer cells while minimizing their uptake by normal tissue. Laboratory studies showed that the uptake of TUSC2 in tumor cells after REQORSA treatment was 10 to 33 times the uptake in normal cells, and studies in three NSCLC patients showed a major increase in TUSC2 expression in tumor tissue one day after REQORSA administration. REQORSA is also delivered systemically as opposed to many other gene therapies which are locally delivered.

REQORSA Origins, Development Rationale, and Strategy

TUSC2 was discovered through a lung cancer research consortium from MD Anderson and The University of Texas Southwestern Medical Center along with the National Cancer Institute. The TUSC2 discovery teams included Jack A. Roth, MD, FACS, chairman of our Scientific Advisory Board.

Our goal is to utilize our novel gene therapy platform to provide more effective treatments to large patient populations suffering from devastating illness.

REQORSA, our lead oncology product candidate, initially is being developed as a potential treatment for NSCLC and SCLC. Clinical and preclinical data indicate that REQORSA, when combined with EGFR TKIs such as Tagrisso, Tarceva and Iressa, provides a synergistic effect. Further, our data shows that REQORSA may re-sensitize EGFR positive patients who become resistant to, and therefore no longer benefit from, EGFR TKIs alone. Preclinical and clinical data support our belief that REQORSA may provide medical benefit in several subpopulations of NSCLC patients for which there is an unmet medical need such as NSCLC patients with EGFR mutations, ALK positive NSCLC patients, and NSCLC patients progressing on RAS inhibitors. Data on REQORSA’s effects in EGFR resistant cancer cells also served as the basis for the receipt from the FDA in January 2020 of our first Fast Track Designation. This FDA Fast Track Designation is for use of the combination of REQORSA with Tagrisso for the treatment of NSCLC patients with EGFR mutations whose tumors progressed on treatment with Tagrisso.

Preclinical data also have shown that REQORSA enhances the immune response to cancer. Data from preclinical studies at MD Anderson have shown a therapeutic benefit from the combination of TUSC2 and anti-PD-1 antibody or anti-PD-L1 antibody and a key role for TUSC2 in regulating immune cell subpopulations including cytokines, NK cells, and T lymphocytes. In addition, TUSC2 has been found to down-regulate PD-L1 on the surface of cancer cells. These data, along with our previous preclinical and clinical data, provided the basis for the receipt from the FDA in December 2021 of our second Fast Track Designation. In granting this Fast Track Designation, the FDA found that REQORSA has the potential to provide a benefit over existing therapies for patients whose tumors progress on Keytruda. This FDA Fast Track Designation is for use of the combination of REQORSA with Keytruda for the treatment of NSCLC patients whose tumors progressed after treatment with Keytruda. Although the Acclaim-2 study in patients progressing on Keytruda containing regimens has been closed due to, among other factors, slow enrollment, we continue to believe that this combination could be beneficial.

Our study in SCLC builds on the preclinical data showing that REQORSA enhances the immune response to cancer, and that the combination of REQORSA and immune checkpoint inhibitors demonstrates a significant benefit over immune checkpoint inhibitors alone. Immune checkpoint inhibitors, such as Tecentriq, have recently been approved for use in ES-SCLC. Tecentriq, for instance, is used in combination with the chemotherapy drugs carboplatin and etoposide for 4 cycles of therapy, and then Tecentriq is administered alone as maintenance therapy until disease progression. Unfortunately, this is a relatively short time since the median PFS after starting maintenance therapy is 2.6 months. Our goal with combining REQORSA and Tecentriq as maintenance therapy is to prolong PFS and survival of ES-SCLC patients. In June 2023, the FDA granted our third Fast Track Designation. In granting this Fast Track Designation, the FDA found that REQORSA has the potential to provide a benefit over existing therapies for patients with ES-SCLC. This FDA Fast Track Designation is for the use of the combination of REQORSA with Tecentriq as maintenance therapy in patients with ES-SCLC who did not develop tumor progression after receiving Tecentriq and chemotherapy as initial standard treatment. In August 2023, the FDA also granted Orphan Drug Designation to REQORSA for the treatment of SCLC.

Preclinical studies by MD Anderson researchers have included combining REQORSA with:

The manufacturers of the marketed drugs were not involved in any of our clinical or preclinical studies. In clinical studies involving marketed drugs, the drugs were administered concurrently with REQORSA without being modified in any way, and the antibodies used in our preclinical studies that did not use the marketed drugs were the non-humanized equivalent to marketed drugs.

Data from these clinical and preclinical studies indicates that combining REQORSA with these other therapies yields results more favorable than either these therapies or REQORSA alone, with minimal side effects relative to other lung cancer drugs, thereby potentially making REQORSA a therapy complementary to these cancer treatments.

Acclaim-1

As described above, in January 2020, we received Fast Track Designation from the FDA for use of REQORSA in combination with TKI Tagrisso for the treatment of NSCLC patients with EGFR mutations whose tumors progressed on treatment with Tagrisso.

We currently are enrolling and treating patients in the Phase 2a expansion portion of our Phase 1/2 Acclaim-1 clinical trial, an open-label, dose-escalation and clinical response study of REQORSA in combination with Tagrisso in patients with advanced, EGFR-mutant, metastatic non-small-cell lung cancer progressing on treatment with Tagrisso or Tagrisso-containing regimens. Patients must have histologically confirmed unresectable stage III or IV EGFR-positive NSCLC (any histology) with:

● ECOG performance status of 0 to 1.

We enrolled 12 patients in the completed Phase 1 dose escalation portion of the Acclaim-1 study and estimate that the Phase 2a expansion portion will enroll approximately 33 patients in one cohort (all of whom have progressed on Tagrisso or Tagrisso-containing regimens), and the randomized Phase 2b portion will enroll approximately 74 patients. Starting with the Phase 2a expansion portion of the study, all patients receiving REQORSA in this study are required to submit an archival biopsy specimen that can be evaluated for TUSC2 expression. The initial trial design of the Phase 2a expansion portion of the study included two cohorts with half being patients who received only prior Tagrisso treatment and the other half being patients who received prior Tagrisso treatment and chemotherapy. However, as previously announced in August 2024, based on resource prioritization and to focus on the patients for whom REQORSA is most likely to show a benefit, we decided to limit our enrollment efforts moving forward to patients who received only prior Tagrisso treatment and cease enrollment of the second cohort (patients who received prior Tagrisso treatment and chemotherapy). However, noting that both of the patients with markedly prolonged PFS in the Phase 1 portion of the study had previously received both chemotherapy and Tagrisso, in February 2025, we amended the protocol to allow entry of patients progressing on Tagrisso or Tagrisso-containing regimens in the Phase 2a expansion portion of the study. There will be an interim analysis following the treatment of 19 patients in the Phase 2a portion of the Acclaim-1 study. We expect to enroll patients at approximately 10-15 U.S. clinical sites for the Acclaim-1 study. We opened the Phase 2a expansion portion of the Acclaim-1 study and enrolled and dosed the first patient in January 2024. We expect to complete the enrollment of the first 19 patients for interim analysis in the Phase 2a expansion portion of the study by the end of 2025 and expect the interim analysis in the first half of 2026. Patients enrolled in the Phase 2b portion of the study will be randomized 1:1 to either REQORSA and Tagrisso combination therapy or to platinum-based chemotherapy. Patients will be treated until disease progression or unacceptable toxicity is experienced.

The primary endpoint of the Phase 1 portion of the Acclaim-1 study was to determine a dose with DLT or, if DLT was not experienced, to determine the randomized RP2D. Since no DLTs were experienced in Phase 1, the 0.12 mg/kg dose of REQORSA was determined to be the RP2D. The primary endpoint of the Phase 2a expansion portion is overall response rate (ORR). The primary endpoint of the Phase 2b randomized portion of the trial is PFS which is defined as time from randomization to disease progression) or death. Patients will also be followed for survival.

In October 2023, one of our clinical collaborators presented a poster presentation at the 2023 AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics detailing the Phase 1 results of the Acclaim-1 study. While the Phase 1 portion of the Acclaim-1 study was designed primarily to assess safety, we believe promising efficacy results were also observed. The reported results showed no DLTs, established a RP2D of 0.12 mg/kg (the highest dose level administered in the trial) and provided data showing early efficacy of REQORSA in combination with Tagrisso. Of the 12 patients treated with escalating doses of REQORSA and standard doses of Tagrisso, all of whom had progressed on Tagrisso containing regimens, three patients had experienced prolonged time to progression, including one with continuing partial response. Specifically, one patient at the 0.06 mg/kg dose level, previously treated with carboplatin, pemetrexed, and Tagrisso, had a partial remission by investigator evaluation and treatment is now ongoing in the trial after 47 cycles, which is approximately 35 months. A second patient at the 0.12 mg/kg dose level who was previously treated with cisplatin, pemetrexed, carboplatin, and Tagrisso had stable disease and received 32 cycles, or approximately 24 months before disease progression occurred. And a third patient who was at the 0.09 mg/kg dose level, previously treated with Tagrisso, had stable disease and received 14 cycles, over approximately 10 months before disease progression occurred. The extended PFS of each of these patients is consistent with long-term PFS seen in several patients in prior early stage clinical trials of REQORSA and is not expected with treatment with Tagrisso alone after progression on Tagrisso containing regimens. REQORSA administration was generally well tolerated and there were no DLTs. The administration was associated with a delayed infusion-related reaction with symptoms such as muscle aches, fever and chills in some patients, which we believe is similar to reactions seen with the administration of antibodies routinely used in oncology treatment. This was managed with prophylactic steroids, acetaminophen and diphenhydramine, and symptoms were not increased, and in most cases decreased, with repeat cycles. We believe this new mechanism and novel approach targeting lung cancer, which comes with a strong safety profile and early signs of efficacy, is paving new ground in the fight against lung cancer.

Acclaim-2

In December 2021, we received Fast Track Designation from the FDA for use of REQORSA in combination with the checkpoint inhibitor Keytruda for the treatment of advanced NSCLC patients whose tumors progressed after treatment with Keytruda.

In 2019, preclinical data were presented by MD Anderson collaborators relating to the combination of REQORSA, with Keytruda showing that TUSC2 combined with the checkpoint blockade mechanism of action of Keytruda was more effective than Keytruda alone in increasing the survival of mice with a human immune system (humanized mice) that had metastatic lung cancer with a human lung cancer. MD Anderson also presented preclinical data in 2019 for the combination of TUSC2, Keytruda and chemotherapy for the treatment of some of the most resistant metastatic lung cancers. This study found that the addition of TUSC2 demonstrates synergy with Keytruda and also with Keytruda combined with chemotherapy, and thus, may improve on the first-line standard of care for lung cancer which includes chemotherapy.

Based on these results, we started our Phase 1/2 Acclaim-2 clinical trial, an open-label, dose-escalation and clinical response study of REQORSA in combination with Keytruda in patients with advanced, metastatic non-small-cell lung cancer who have progressed after treatment with Keytruda. However, as previously announced in August 2024, Genprex has ceased enrollment in the Acclaim-2 trial. Enrollment was slow, due to competition with many other clinical trials for the same patient population, which led to the decision to end enrollment in the trial. Study closure activities are in progress. Although the Acclaim-2 study in patients progressing on Keytruda containing regimens has been closed due to, among other factors, slow enrollment, we continue to believe that this combination could be beneficial.

Acclaim-3

In June 2023, the FDA granted Fast Track Designation for the Acclaim-3 treatment combination of REQORSA and Tecentriq as maintenance therapy for patients with ES-SCLC who did not develop tumor progression after receiving Tecentriq and chemotherapy as initial standard treatment. In August 2023, the FDA granted Orphan Drug Designation to REQORSA for the treatment of SCLC. We have completed enrollment in the Phase 1 portion of the Acclaim-3 study and are currently enrolling patients in the Phase 2 portion of the study. Patients in the study will be enrolled after receiving initial treatment with 3-4 cycles of carboplatin, etoposide, and Tecentriq, and achieving complete response, partial response or stable disease. They will then receive treatment with REQORSA and Tecentriq as maintenance therapy every 21 days until disease progression. Patients will be treated with REQORSA and Tecentriq until disease progression or unacceptable toxicity is experienced.

In January 2024, we opened the Phase 1 portion of the Acclaim-3 study for enrollment and added multiple clinical sites through our collaboration with a large network of integrated, community-based oncology practices. The Phase 1 dose escalation portion of the trial was completed by the end of 2024. The primary endpoint of the Phase 1 escalation portion was to determine the MTD or RP2D. The Phase 1 portion of the trial had no DLTs, and therefore in December 2024, we announced that the Acclaim-3 SRC recommended that the RP2D be 0.12 mg/kg, which was the highest dose level delivered in the Phase 1 portion of the trial. We previously reported the first patient treated in the Phase 1 dose escalation portion of the Acclaim-3 trial had a partial remission, which is defined as at least a thirty percent (30%) decrease in tumor size, from prior to the start of maintenance therapy to the time of the CT scan performed after two cycles of maintenance therapy. A CT scan performed after four cycles of maintenance therapy (three months), confirmed that the patient had a 30% decrease in tumor size in measurable lesions; however, one lesion not previously measurable had grown in size, thus leading to a conclusion of disease progression at that time. Another patient in the Phase 1 dose escalation portion of the Acclaim-3 trial had a twenty-three percent (23%) decrease in tumor size from prior to the start of maintenance therapy to the time of the CT scan performed after two cycles of maintenance therapy. This 23% decrease was maintained thru the CT scan performed after four cycles of maintenance therapy, and the patient continues to receive study therapy to date. As the maintenance therapy consists of REQORSA and Tecentriq, and the patients have already received four cycles of Tecentriq during induction therapy and thus responses to Tecentriq would likely have occurred earlier, the Company believes these data suggest that REQORSA may be providing clinical benefit.

We are currently enrolling and treating patients in the Phase 2 expansion portion of our Phase 1/2 Acclaim-3 clinical trial. We now anticipate enrolling approximately 50 patients at approximately 10 to 15 U.S. clinical sites. Patients will be treated with REQORSA and Tecentriq until disease progression or unacceptable toxicity is experienced. The primary endpoint of the Phase 2 portion is to determine the 18-week progression-free survival rate from the time of the start of maintenance therapy with REQORSA and Tecentriq in patients with ES-SCLC. Patients will also be followed for survival. A Phase 2 futility analysis will be performed after the 25th patient enrolled and treated reaches 18 weeks of follow up. We expect to complete enrollment of the first 25 patients for interim analysis in the Phase 2 expansion portion of the study in the second half of 2025.

ONC-001: REQORSA® Phase 1 Monotherapy Trial (completed)

In 2012, MD Anderson researchers completed a Phase 1 clinical trial of REQORSA as a monotherapy (the “Phase 1 Monotherapy Trial”) in patients with advanced NSCLC with disease progression at study entry. The primary objective of the REQORSA Monotherapy Trial was to assess the toxicity of REQORSA administered intravenously and to determine the MTD and RP2D of REQORSA alone. Secondary objectives were to assess the expression of TUSC2 following intravenous delivery of REQORSA in tumor biopsies and also to assess the anticancer activity of REQORSA. This trial showed that REQORSA was well tolerated and established the single-agent MTD and the therapeutic dosage for REQORSA at 0.06 mg/kg administered every 21 days. This MTD was established based on the occurrence of an asymptomatic, Grade 3 laboratory abnormality (hypophosphatemia) in 2 patients. Based on the present adverse event scales used in 2025, that laboratory abnormality would be classified as Grade 2. The definition of MTD used in the monotherapy trial was met based on this earlier version of the adverse event scale; however, with this new grading it is not clear that the MTD determined in this study is an accurate MTD for quaratusugene ozeplasmid, and in the ONC-003 and ONC-005 studies the RP2D was determined to be twice this dose. Although this trial was not designed to show changes in outcomes, a halt in cancer growth was observed in a number of patients, and tumor regressions occurred in primary lung tumors and metastatic cancers in the liver, pancreas, and lymph nodes. In addition, pre- and post-treatment patient biopsies demonstrated that intravenous REQORSA selectively and preferentially targeted patient’s cancer cells and suggested that clinical anti-cancer activity was mediated by increased expression of TUSC2 in the cancer cells.

In the Phase 1 Monotherapy Trial, REQORSA was administered intravenously to stage IV (metastatic) lung cancer patients who had received traditional platinum combination chemotherapy but had tumor progression at the time of entry into the study. Thirty-one subjects were treated at six dose levels. Seventy percent of subjects had received two or more prior chemotherapy regimens. The only serious adverse events were grade 3 fever (experienced by three patients) and grade 3 hypotension (experienced by 1 patient). The only dose-limiting toxicities were two episodes of transient grade 3 hypophosphatemia (abnormally low levels of phosphate in the blood) resulting in an MTD of 0.06 mg/kg. Five patients, or 22% of the 23 evaluable patients, achieved disease control for periods ranging from 2.6 months to 10.8 months. The median disease control period for these patients was 5.0 months (95% CI: 2.0-7.6). Median survival for all subjects in the Phase 1 Monotherapy Trial was 8.3 months (95% CI 6.0-10.5 months) and mean survival time was 13.2 months (95%CI 8.9-7.5 months) with a range of two to 23+ months.

Two subjects had reductions in primary tumor size of 14% and 26%. One subject with stable disease, a 54-year-old female with a large cell neuroendocrine carcinoma who received 12 cycles of REQORSA therapy before having disease progression, had evidence of a durable metabolic response, which is a lasting reduction of metabolic activity in the tumor, as shown by positron emission tomography (“PET”) imaging. The response was documented with PET scans performed after the second, fourth and sixth doses, all showing markedly decreased metabolic activity in the tumor with no changes in size or number of metastases by computed tomography (“CT”) imaging. The illustration below is of the PET scan of this subject performed at baseline (Illustration A) and after the fourth dose (Illustration B). This subject had received six prior chemotherapy regimens. Prior to entry in the Phase 1 Monotherapy Trial, two hepatic metastases were progressing on gemcitabine. The subject also had a metastasis in the head of the pancreas and a peripancreatic lymph node, shown by the arrows in the illustration below. Illustration A shows the pretreatment PET scan. Illustration B shows the post treatment PET scan performed 20 days following the fourth dose of REQORSA. All scans were performed within a 60 to 90 minute window after injection.

Metabolic Tumor Response in a Metastatic Lung Cancer Subject

This subject survived after subsequent therapy more than seven years after the final treatment with REQORSA, to our knowledge, without evidence of cancer progression in the responding sites.

ONC-002: Phase 1/2 - Trial Combining REQORSA with Tarceva (Phase 1 portion completed; Phase 2 portion closed in order to conduct Acclaim-1 instead)

Phase 1 Portion: The Phase 1 Monotherapy Trial showed that REQORSA is well tolerated, that high levels of TUSC2 expression are detected in the tumor post-treatment, and that there was evidence of tumor growth suppression. Based on the results from the Phase 1 Monotherapy Trial and substantial preclinical evidence that REQORSA is complementary with EGFR TKIs, we began a Phase 1/2 trial (the “Phase 1/2 Combination Tarceva Trial”) at MD Anderson combining REQORSA with Tarceva in patients with Stage IV (metastatic) or recurrent NSCLC that is not potentially curable by radiotherapy or surgery. Patients were enrolled whether or not they had an activating EGFR mutation. Enrollment in the Phase 1 portion of the Phase 1/2 Combination Tarceva Trial commenced in 2014 at MD Anderson with Dr. Charles Lu as the Principal Investigator.

In the Phase 1 portion of the Phase 1/2 Combination Tarceva Trial, 18 subjects were treated with the following dose levels:

Dose Level Drug Doses

1 Tarceva (100 mg/day) + REQORSA (0.045 mg/kg)

2 Tarceva (100 mg/day) + REQORSA (0.060 mg/kg)

3 Tarceva (150 mg/day) + REQORSA (0.045 mg/kg)

4 Tarceva (150 mg/day) + REQORSA (0.060 mg/kg)

As in the Phase 1 Monotherapy Trial, subjects received a pre-treatment regimen of oral and intravenous dexamethasone and diphenhydramine to prevent infusion reaction symptoms such as fever, along with an infusion of REQORSA every three weeks. Subjects received oral Tarceva daily during each three-week cycle during the treatment period.

The Phase 1 portion of the Phase 1/2 Combination Tarceva Trial was also a dose escalation study with the primary purpose of determining the MTD. DLT were defined as grade 3, 4, or 5 events during the first cycle of treatment that were considered to be treatment related. At dose level 1, one subject had grade 3 adverse events of fatigue, muscle weakness, and hyponatremia (low sodium level) considered to be related to the study treatment (Tarceva). Therefore, three additional subjects were treated at this dose level (six subjects total), none of whom had a DLT. At dose level 2, there were no DLTs. At dose level 3, one subject had a grade 3 rash considered to be related to the study treatment (Tarceva); therefore, an additional three subjects were treated at this dose level (six subjects total). No additional subjects had a DLT. At dose level 4, there were no DLTs; thus, dose level 4, as the highest dose evaluated, was determined to be the dose to be used in the Phase 2 portion of the study.

Since the eligibility criteria, drug administration details (other than dose) and evaluation details were identical for the Phase 1 portion and the Phase 2 portion, the three subjects in the Phase 1 portion of the Phase 1/2 Combination Tarceva Trial who were treated at the Phase 2 dose (0.06 mg/kg) were included in the analysis of the Phase 2 portion of the study.

Phase 2 Portion: The Phase 2 portion of the Phase 1/2 Combination Tarceva Trial was a Simon two-stage trial designed to include subjects treated with the combination of REQORSA and Tarceva at the Phase 2 dose with the primary goal of measuring the response rate, and secondary endpoints of stable disease, time to progression and overall survival. The response rate for cancer therapies was defined as Complete Response (CR) + Partial Response (PR); disease control rate was defined as Complete Response (CR) + Partial Response (PR) + Stable Disease (SD) > 8 weeks. Although this Simon two-stage trial was closed early to start the Acclaim-1 study instead, the trial had already met the required response rate to advance to the second stage and to complete the full enrollment.

Enrollment criteria for the Phase 2 portion were identical to those in the Phase 1 portion. Subjects received three-week cycles of REQORSA in combination with Tarceva until the occurrence of progressive disease (PD), unacceptable toxicity, withdrawal of consent, or study treatment discontinuation for other reasons, whichever occurred first.

Of the 39 patients planned for the Phase 2 portion of the trial, 10 were enrolled (three of whom were also subjects of the Phase 1 portion of the Phase 1/2 Combination Tarceva Trial). None of the 10 subjects treated in the Phase 2 portion of the Phase 1/2 Combination Tarceva Trial had a DLT. Results from the Phase 2 portion for the 10 patients show that:

● Three patients had tumor regression; and

● Disease control rate was 70%.

The patient with the CR, a 58-year-old female, upon enrollment in the study had metastatic NSCLC following 6 cycles of pemetrexed and carboplatin and after two cycles of maintenance pemetrexed had cancer progression. The patient’s tumor had EGFR exon 18 and 20 missense mutations, which are not sensitive to Tarceva alone. This patient had disappearance of lung lymph node metastases.

The response rate and disease control rate observed in the Phase 2 portion of the Phase 1/2 Combination Tarceva Trial substantially exceeds the response rate of 7% (with no CRs) and disease control rate of 58% reported for a clinical trial of the EGFR TKI afatinib (marketed as Gilotrif® by Boehringer Ingelheim Pharmaceuticals, Inc.) in a study referred to as the LUX-Lung 1 clinical trial. The LUX-Lung 1 clinical trial was a randomized, double blinded Phase 2b/3 clinical trial treating subjects with Stage IIIB or IV adenocarcinoma, a type of NSCLC. Patients in that trial had received one or two previous chemotherapy regimens and had disease progression after at least 12 weeks of treatment with EGFR inhibitors erlotinib or gefitinib. A total of 585 patients were enrolled in that Phase 2b/3 clinical trial, whose primary endpoint was overall survival and whose secondary endpoints included progression-free survival and RECIST response. The Phase 2 portion of our Phase 1/2 trial was not blinded and was designed to treat NSCLC subjects regardless of EGFR status.

The following table provides data from the Phase 2 portion of the Phase 1/2 Combination Tarceva Trial for subjects with and without EGFR mutations. Note that two patients with disease progression on Tarceva received 10 and 12 cycles of Tarceva, respectively, before disease progression and entry into the trial. With the combination of REQORSA and Tarceva, both of these patients had stable disease, suggesting that the combination therapy may be an effective treatment for patients whose disease is progressing after extensive Tarceva treatment. We are no longer enrolling the Phase 2 portion of the Phase 1/2 Combination Tarceva Trial in favor of conducting the Acclaim-1 trial, which combines REQORSA with Tagrisso, since Tagrisso has been shown to be more effective than Tarceva as initial therapy for patients with NSCLC with EGFR mutations.

Preclinical Studies of REQORSA Supporting Our Conduct of Acclaim-1

REQORSA and Tyrosine Kinases. Investigators at MD Anderson conducted preclinical research showing that REQORSA alone blocked the activation of the c-Abl tyrosine kinase. A number of other studies at MD Anderson have shown the complementary effects of REQORSA combined with a variety of targeted kinase inhibitory agents, both marketed and in various stages of clinical development, including Tarceva, Iressa, and Tagrisso.

REQORSA and TUSC2 deficient and Tarceva or Iressa resistant cell lines. MD Anderson researchers also tested REQORSA in TUSC2-deficient and Tarceva- or Iressa-resistant NSCLC cell lines. Treatment of the NSCLC EGFR mutation negative cell lines H1299, H322, H358 and H460 cancer cell line showed that the REQORSA combination significantly sensitized (p<0.001) response of the cancer cell lines to both Tarceva or Iressa treatment and synergistically induced apoptosis in vitro. The findings were confirmed in vivo in an H322 orthotopic lung cancer mouse model. These studies included the Kras mutant cell line H460, which is significant because patients with Kras mutant tumors are generally unresponsive to Tarceva or Iressa. Synergistic induction of apoptosis was observed with the combination of REQORSA and concentrations of Tarceva or Iressa similar to steady-state serum concentrations achievable with oral dosing. The combination of REQORSA and either Tarceva or Iressa induced similar levels of tumor cell growth inhibition, apoptosis induction, and inactivation of oncogenic protein kinases.

Data from these and other studies suggest a combination of REQORSA with Iressa or Tarceva can promote synergistic tumor cell killing and overcome drug-induced resistance by simultaneously inactivating the EGFR and the AKT signaling pathways and by inducing apoptosis in resistant cells with nonmutated EGFR. These data suggest that NSCLC patients with an activating EGFR mutation, whose cancer progresses on Tarceva, may potentially benefit from REQORSA with Tarceva combination therapy. These data also suggest that NSCLC patients without an activating EGFR mutation (generally unresponsive to Tarceva) may potentially benefit from REQORSA with Tarceva combination therapy. These data provided strong support for the ONC-002 trial, which combined REQORSA with Tarceva.

REQORSA in Tagrisso resistant cell lines. Tagrisso (osimertinib), a third-generation EGFR inhibitor, shows robust clinical activity, yet patients inevitably develop secondary resistance. An osimertinib resistant H1975-OsiR isogenic cell line was developed through continuous exposure to osimertinib, and an osimertinib resistant clone was selected which showed 100-fold higher resistance to osimertinib compared with its parental counterpart (H1975-parental). Xenograft tumors from both H1975-parental and H1975-OsiR cells were developed in NSG mice and were treated with osimertinib. H1975-OsiR tumors were significantly less sensitive than its parental counterpart. Synergistic antitumor activity of TUSC2+osimertinib was found in H1975-OsiR tumors where both TUSC2+osimertinib (5mg/kg) and TUSC2+osimertinib (10mg/kg) combinations showed a robust antitumor effect compared with single agent treatment groups. No synergistic effect was observed for H1975-parental tumors. In conclusion, TUSC2 therapy in combination with osimertinib showed synergistic antitumor efficacy in EGFR mutant osimertinib resistant NSCLC tumors. These data provide a strong biologic rationale for the Acclaim-1 clinical trial.

Preclinical Studies of TUSC2 in the Immune Response to Cancer Supporting Our Conduct of Acclaim-2

Preclinical studies indicate that REQORSA is selectively taken up by tumor cells with a 10 to 33 fold differential favoring uptake by tumor cells, thus imparting a passive targeting property without the need to attach targeting ligands. REQORSA targeting is partly due to the attraction of opposite charges (REQORSA has a positive charge, normal cells no charge, and most cancer cells have a negative charge), and partly due to increased endocytosis by tumor cells, and is enhanced by the leakiness that is characteristic of tumor vasculature compared to normal vasculature.

In experimental mouse xenograft models, the ONCOPREX delivery system was shown to efficiently deliver several therapeutic tumor suppressor genes (TP53, FHIT, TUSC2) to disseminated human cancer cells. Metastatic tumor growth was suppressed, and survival prolonged, after systemic administration of the genes via a nanovesicle vector. Human NSCLC A549 cells have virtually no TUSC2 protein. As shown in Figure 1, intratumoral administration of REQORSA (referred to as FUS1 in Figure 1) to subcutaneous NSCLC H1299 tumor xenografts resulted in inhibition of tumor growth.

Figure 1. Effect of REQORSA on the Growth of H1299 Subcutaneous Tumor Xenografts in Nude Mice

Moreover, intravenous injections of REQORSA into mice bearing experimental A549 lung metastases resulted in a decrease in the number of metastatic tumor nodules. Lung tumor-bearing animals treated with REQORSA also had a significant increase (P=0.01) in survival time (median survival time: 80 days) compared with 48 to 51 days for control animals.

Analysis of TUSC2 expression by IHC following REQORSA treatment showed distribution of TUSC2 throughout the tumor in a high percentage of the tumor cells. These results demonstrate the potent tumor suppressing activity of the TUSC2 gene, supporting the feasibility of using nanovesicles for systemic plasmid delivery to metastases as well as to primary tumors, and implicating REQORSA as a promising therapeutic agent for primary and disseminated human lung cancer.

REQORSA Synergizes with Pembrolizumab

It was previously shown that the combination of REQORSA and an anti-PD1 antibody inhibited tumor growth synergistically in subcutaneous and metastatic NSCLC KRAS mutant syngeneic mouse models. To determine whether this synergy also applies to the KRAS/LKB1 mutant subtype of human A549 NSCLC cells, humanized mice harboring KRAS/LKB1 mutant A549 lung metastases were treated with REQORSA, pembrolizumab or the combination. These studies were performed with an improved humanized mouse model using fresh human umbilical cord blood derived CD34+ stem cells in irradiated NSG mice, in which mouse immune system cells have been largely destroyed. The reconstituted humanized mice have a fully competent human immune system with major functional immune populations and were used here to evaluate synergy between REQORSA and pembrolizumab.

The treatment strategy is shown in Figure 2A. REQORSA (referred to as TUSC2 in Figure 2) was administered intravenously every 48 hours for a total of three injections, and pembrolizumab was administered every 3-4 days a total of three times. Bioluminescence imaging was performed to visualize the intensity of tumor burden for mice in different treatment groups both in humanized and non-humanized mice. Both REQORSA and pembrolizumab monotherapies reduced the tumor burden significantly, although pembrolizumab was moderately more effective. Importantly, REQORSA plus pembrolizumab inhibited tumor growth synergistically (*P< 0.05, **P< 0.005, ***, P< 0.0005). (Figure 2B, C). There was no antitumor effect of pembrolizumab and reduced change with REQORSA in non-humanized mice, which was expected since these mice have no immune cells.

To identify the immunological features associated with efficacy of this combination, in depth immune profiling of the tumor microenvironment was performed. An increased number of reconstituted human CD3+ T cells was found in all groups, compared with the untreated control. CD8+ T cells were significantly upregulated by pembrolizumab and its combination with REQORSA (Figure 2D). Levels of activated CD8+ T cells (CD8+CD69+) were also significantly increased in the combination group and were slightly higher than the pembrolizumab group (Figure 2D). There was no effect of pembrolizumab on NK/activated NK cells, whereas REQORSA alone enhanced their levels significantly, indicating REQORSA regulation of NK activation, which is consistent with the previous findings reported in syngeneic mice. The combination had a similar effect as REQORSA monotherapy (Figure 2E). REQORSA, pembrolizumab, and the combination, were all associated with significant decrease of reconstituted human myeloid derived suppressor cells (“MDSCs”) (CD33+ve), (Figure 2F). Pembrolizumab and the combination had a profound stimulatory effect on HLA-DR+ dendritic cells (DCs), (Figure 2G). REQORSA alone enhanced HLA-DR+DC levels moderately. Taken together, these results show that the combination of REQORSA and pembrolizumab enhanced the immune response and inhibited tumor growth synergistically (*P< 0.05, **P< 0.005, ***, P< 0.0005).

REQORSA also showed synergistic antitumor activity with nivolumab in the same mouse model, highlighting the role of REQORSA rendering KRAS/LKB1 mutant tumors more sensitive to immune checkpoint blockade. Thus, these data suggest that the synergy of REQORSA with immune checkpoint inhibitors is not limited to pembrolizumab.

Figure 2. Synergistic Antitumor Effect of REQORSA Immunogene Therapy with Pembrolizumab on

KRAS/LKB1 Mutant Lung Metastases in the Humanized Mouse Model

Preclinical Studies of TUSC2 Supporting Our Conduct of Acclaim-3

Transfection of SCLC cells in vitro with TUSC2 showed growth inhibition and a marked suppression of colony formation compared to cells transfected with a control vector. These results demonstrate the potential tumor suppression function of TUSC2 in SCLC cells and suggest that TUSC2-mediated gene therapy could be a useful therapeutic strategy for the treatment of SCLC.

Data presented at the October 2023 AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics from studies in humanized mouse models of SCLC that use human H841 cells have shown that the combination of quaratusugene ozeplasmid and atezolizumab provides significantly better control of tumor burden than either agent alone (Figure 3, Figure 4, and Figure 5). H841 is a human SCLC cell line that does not express TUSC2 protein, and which was labeled with luciferase for these experiments. When injected intravenously, H841 cells metastasize to both lung and liver. The reconstituted humanized mice have a fully competent human immune system with major functional immune populations, which showed antigen specific T cell responses as well as antitumor activity with immune checkpoint blockade therapy and was used here to evaluate synergy between quaratusugene ozeplasmid and atezolizumab.

In these studies, one million H841 cells/mouse were injected intravenously, and treatment began 12 days later, after the metastases were well established. Quaratusugene ozeplasmid was administered intravenously every other weekday at a dose of 25 μg/mouse of plasmid DNA: 10 nmol liposome solution in 100 μL of D5W for 5 doses. Atezolizumab was administered at a dose of 300 μg/mouse intraperitoneal injection twice a week for 4 doses. Three weeks later, bioluminescence imaging was performed to visualize the intensity of tumor burden for mice in different treatment groups.

Humanized mice with H841 xenografts were treated with quaratusugene ozeplasmid, atezolizumab or the combination. With the combination of quaratusugene ozeplasmid and atezolizumab there was a highly significant reduction in tumor burden compared to the results with atezolizumab alone (p=0.002). There was approximately a 10-fold reduction in tumor burden in the quaratusugene ozeplasmid plus atezolizumab group compared to untreated control mice. Note that 3 out of 5 mice in the quaratusugene ozeplasmid plus atezolizumab group had complete or near-complete responses (Figure 3). Figure 4 provides a graph of the bioluminescence flux in the treatment groups.

Analysis of the tumor immune microenvironment in the H841 xenografts (Figure 5) shows that, compared to treatment with atezolizumab alone, the combination of quaratusugene ozeplasmid and atezolizumab leads to increased numbers of huCD8 T-cells, NK cells, and DC, and lower numbers of MDSCs. These changes indicate an increased immune response to the xenograft and identify at least one mechanism responsible for the increased tumor response seen with quaratusugene ozeplasmid and atezolizumab in combination.

In summary, the data from these studies suggest that a combination treatment of quaratusugene ozeplasmid and atezolizumab can promote a significantly increased tumor cell killing effect in SCLC xenografts compared to that of atezolizumab alone.

Figure 3. Bioluminescence Flux after Quaratusugene Ozeplasmid and Atezolizumab as Single Agents

and in Combination in H841 SCLC Model in Humanized Mice

Abbreviations: Atezo = atezolizumab; max = maximum; min = minimum; Quar Oze = quaratusugene ozeplasmid; SCLC = small cell lung cancer

Figure 4. Graph of Bioluminescence Flux after Quaratusugene Ozeplasmid and Atezolizumab as

Single Agents and in Combination in H841 SCLC Model in Humanized Mice

Abbreviations: Atezo = atezolizumab; Quar Oze = quaratusugene ozeplasmid; SCLC = small cell lung cancer

Figure 5. Analysis of the Tumor Immune Microenvironment After Quaratusugene Ozeplasmid

and Atezolizumab as Single Agents and in Combination Using an H841 SCLC Model in Humanized Mice

Abbreviations: Atezo = atezolizumab; DC = dendritic cells; HLA-DR = human leukocyte antigen – DR isotype; huCD8 T cells = human CD8 T cells; huNK = human natural killer cells; MDSC = myeloid derived suppressor cells; Quar Oze = quaratusugene ozeplasmid; TME = tumor microenvironment

Introduction – Diabetes

Diabetes Mellitus. Diabetes mellitus refers to a group of metabolic diseases that affect how the body produces and uses blood sugar (glucose). Glucose is vital to health because it is an important source of energy for the cells that make up the body’s muscles and tissues. It is also the brain’s main source of fuel. Chronic diabetes conditions include Type 1 diabetes and Type 2 diabetes, both of which lead to excess glucose in the blood and can cause serious health problems. Left untreated, high blood glucose levels can damage the eyes, kidneys, nerves, and the heart, and can also lead to coma and death.

Epidemiology of Diabetes. According to the U.S. Center for Disease Control as of 2024, 38.4 million Americans, or approximately 11.6% of the U.S. population, have diabetes. It is also believed that more than 97 million Americans aged 18 years or older have prediabetes. In 2021, approximately 537 million adults (20-79 years) worldwide were living with diabetes, and the total number of people living with diabetes is projected to rise to 643 million by 2030 and 783 million in 2045. Also in 2021, diabetes caused more than 6.7 million deaths globally and diabetes resulted in approximately $966 billion dollars in health expenditures, a 316% increase over the preceding fifteen years.

The Role of Alpha Cells and Beta Cells. The two most abundant endocrine cell types in the pancreas, the beta and the alpha cells, are essential for the maintenance of blood glucose homeostasis whereby levels of glucose are maintained by the body within a narrow range. While the beta cell produces insulin, the only blood glucose-lowering hormone of the body, the alpha cell releases glucagon, which elevates blood glucose.

In people with Type 1 diabetes, however, beta cells are destroyed by the immune system and no longer secrete insulin, leading to an absolute deficit of insulin. Type 2 diabetes is due to “insulin resistance,” an initial resistance of the body’s cells to obey the direction from insulin. To overcome this resistance, the beta cells secrete more insulin, and glucose is eventually forced into the cells. Glucose is maintained within normal limits, but at the expense of increased insulin secretion by the beta cells. After many years of such increased secretion, the beta cells become “tired” from working overtime, and the fatigue process begins. This fatigue tends to be progressive, and in time the compensation for insulin resistance disappears. At that point, blood glucose levels start going up.

Current Treatments for Diabetes. Advances in new treatments have helped many people better manage the disease. However, despite patients’ best attempts, managing diabetes remains a challenging, daily balancing act because exogenous insulin therapy simply cannot ideally mimic the body’s biological function.

Type 1 diabetes patients are treated with insulin, with most of the progress in therapy relating to enhanced delivery of the drug and improved methods for measuring blood glucose levels. A variety of drug release technologies have allowed for rapid-acting, intermediate-acting and long-acting insulin injections that provide drug anywhere from one to 24 hours. In addition, improvements in needles, continuous delivery ports, and inhalation technologies all have helped patients better manage their disease and may impact quality of life, but none of these advances are disease modifying.

Type 2 diabetes patients are advised to use diet and exercise to manage their condition. When these lifestyle changes alone do not control the disease, Type 2 diabetes patients may be prescribed a variety of medications that help alter how the body manages blood sugar levels. For example, biguanides such as metformin, reduce the amount of glucose produced in the liver. DPP-4 inhibitors, such as Januvia®, Onglyza®, and Tradjenta®, improve blood sugar levels and prevent them from dropping too low. Glucagon-like peptides, such as Byetta®, Trulicity® and Victoza®, change the way the body produces insulin. Drugs in the SGLT2 inhibitor class, such as Farxiga and Invokana, release more glucose into the urine. Finally, insulin injections may be needed if these oral medications, along with diet and exercise, do not lower blood sugar levels enough. These medications, including insulin replacement therapy, while offering improvements for Type 2 diabetes patients, do not affect the underlying cause of the disease.

GPX-002

As further described in the “Licenses and Research Collaborations” section below, we have exclusively licensed from the University of Pittsburgh multiple technologies relating to the development of a gene therapy product for each of Type 1 and Type 2 diabetes. The same general novel approach is used in each of Type 1 and Type 2 diabetes whereby an AAV vector containing the Pdx1 and MafA genes is administered directly into the pancreatic duct. In humans, we believe this can be done with a routine endoscopy procedure, called endoscopic retrograde cholangiopancreatography (ERCP). Our diabetes product candidates are currently being evaluated and optimized in preclinical studies at the University of Pittsburgh. GPX-002 is being developed using the same construct for the treatment of both Type 1 diabetes and Type 2 diabetes. GPX-002 for Type 1 diabetes is designed to work by transforming alpha cells in the pancreas into functional beta-like cells, which can produce insulin but may be distinct enough from beta cells to evade the body’s immune system. In a similar approach, GPX-002 for Type 2 diabetes (formerly known as GPX-003), where autoimmunity is not at play, is believed to work by replenishing and rejuvenating exhausted beta cells that make insulin. We finalized the components of the diabetes construct to take forward for nonclinical studies and in December 2023, we submitted a request to meet with the FDA to obtain their guidance on the nonclinical studies needed to file an IND application and initiate first-in-human studies. As a result of the FDA’s response, we decided to continue with our planned additional nonclinical studies before requesting regulatory guidance for the IND-enabling studies. We are currently working with the University of Pittsburgh on species analyses for the animal models as well as on other regulatory and clinical strategic planning, including the planned initiation of research in Type 2 diabetes animal models, following which we believe we would be poised to seek further regulatory guidance from the FDA on IND-enabling studies in the second half of 2025.

In October 2023, we entered into a one-year extension to our August 2022 sponsored research agreement with the University of Pittsburgh for the use of GPX-002 in a NHP model in Type 2 diabetes. The extension includes a revised research plan to encompass our most recent technologies to which we originally acquired exclusive rights from the University of Pittsburgh in July 2023, as amended and restated in the comprehensive New UP License Agreement in February 2025. These include a MafB promoter to drive expression of the Pdx1 and MafA transcription factors that can potentially be used for both Type 1 and Type 2 diabetes.

This gene therapy approach has been tested in vivo in mice and NHPs using an earlier construct as described below.

Preclinical Mouse Studies

In studies in mice treated to destroy insulin producing beta cells and in non-obese diabetic (“NOD”) mice, both of which are models of Type 1 diabetes, our gene therapy approach restored normal blood glucose levels for an extended period of time, and markedly increased the mass of insulin producing beta cells.

The figures below show that starting approximately a week after injection of the engineered AAV construct (labeled AAV8-PM) into the pancreatic duct, the blood glucose level markedly improved in mice in which insulin producing cells had been destroyed by the drug alloxan (ALX). In addition, the mass of beta cells and beta-like cells producing insulin was significantly increased.

NOD mice develop diabetes due to an immune attack that destroys the insulin producing beta cells in the pancreas. The figures below show that starting approximately a week after injection of the engineered AAV construct (labeled AAV8-PM) into the pancreatic duct the blood glucose level markedly improved in NOD mice. In addition, there is a significant increase in the mass of beta cells and beta-like cells that produce insulin. The improvement in glucose level normalization lasted approximately 4 months, which, according to the researchers could potentially translate to decades in humans. Importantly, comparison to the effect of syngeneic islet transplants suggests that the beta-like cells generated in these experiments are recognized poorly by the immune system, as NOD mice given syngeneic islet transplants became hyperglycemic a median of 17 days after treatment compared to the 4 months of glucose control generated in these experiments.

The researchers also carried out an experiment to determine if the same AAV engineered construct could be used to convert human alpha cells to beta-like cells that would produce insulin as shown in the figures below. Human pancreatic islets were treated with streptozotocin (STZ) to destroy beta cells, and then were treated with the AAV engineered construct. They were then transplanted into NOD mice that had been treated with alloxan (ALX), and also modified so they would not reject human cells. The NOD mice that received the AAV engineered construct had significantly lower blood glucose levels and higher mass of beta and beta-like cells that secrete insulin than did control mice. These data suggest that the same AAV engineered construct can convert human alpha cells into insulin secreting beta-like cells.

Preclinical Non-Human Primate Studies

In February 2023, the Company’s research collaborators at the University of Pittsburgh presented preclinical data in a NHP model of Type 1 diabetes highlighting the therapeutic potential of GPX-002 at the 16th International Conference on Advanced Technologies & Treatments for Diabetes (ATTD 2023) in Berlin, Germany. The statistically significant study results showed that after infusion of the AAV engineered construct all eight of the NHPs had:

● Decreased insulin requirements (p<0.001);

● Increased c-peptide levels (p<0.05);

We believe these data in NHPs demonstrate the potential for this gene therapy treatment to eliminate the need for insulin replacement therapy for Type 1 and Type 2 diabetic patients. We have also initiated research on a non-viral lipid nanoparticle delivery system that would allow a patient to receive multiple treatments.

Discovery Programs

Oncology

ONCOPREX® Delivery System as a platform. We believe that the ONCOPREX Delivery System may be applicable to delivery of a range of therapeutic and prophylactic plasmid DNA and RNA interference constructs and shows efficacy in cancers beyond lung cancer. We also believe that the manufacturing methods we have developed for REQORSA may be useful for a wide array of disease treatments. Clinical data from the use of REQORSA has shown that the ONCOPREX Delivery System is well tolerated in humans and can be delivered at high therapeutic doses.

Rights to other Tumor Suppressor Genes. We have licensed rights to the tumor suppressor gene, TUSC2, which is located in a sub-region of human Chromosome 3 known as 3p21.3, on which multiple tumor suppressor genes are located, including for example, 101F6, NPRL2, CACNA2D2, PL6, BLU, RASSF1, HYAL 1 and HYAL2. Using a number of techniques, MD Anderson researchers and their collaborators have identified these genes as potentially having cancer-fighting characteristics. MD Anderson researchers have subsequently conducted a number of preclinical studies on certain of these genes, particularly NPRL2, as well as TUSC2, both alone and in combination with other compounds, in order to assess their actual effects on lung cancer. Under past and current sponsored research agreements with MD Anderson, we support continuing research into the cancer-fighting properties of these and other genes in the 3p21.3 sub-region.

Researchers at MD Anderson have collaborated with other researchers to identify other genes, such as those in the 3p21.3 chromosomal region, which may act as tumor suppressors or have other cancer fighting functions. We hold rights to certain of these genes under license agreements with MD Anderson. Data from preclinical studies performed by MD Anderson researchers and others suggest that TUSC2, the active agent in REQORSA, could be effective against other types of cancer, including glioblastoma, mesothelioma, head and neck, breast (including triple-negative breast cancer), renal cell (kidney), thyroid, and soft tissue sarcoma, as well as NSCLC and SCLC. Therefore, the ONCOPREX Delivery System may allow delivery of a number of cancer fighting genes, alone or in combination with other cancer therapies, to combat multiple types of cancer.

Preclinical Studies with Other Tumor Suppressor Genes

In addition, we have identified internally other tumor suppressor genes on which we have filed for intellectual property protection. NPRL2, a tumor suppressor gene, is often reduced in NSCLC. The restoration of NPRL2 activates cell cycle arrest and apoptosis. Genprex research collaborators presented additional research findings on NPRL2, the second tumor suppressor gene enabled by the ONCOPREX Delivery System, at the 2024 AACR meeting.

Our researchers investigated the anti-tumor immune responses to NPRL2 gene therapy in NSCLC cells with KRAS/STK11 co-mutations. The KRAS/STK11 co-mutation is associated with resistance to PD-1/PD-L1 inhibitors, such as Keytruda, and with poor overall survival in NSCLC patients. In the study, induced lung metastases in humanized mice were treated through intravenous injection of nanoparticles containing a plasmid with the NPRL2 gene, made with the ONCOPREX Delivery System, with or without Keytruda. The study found that the NPRL2 treatment decreased lung metastases but Keytruda alone had no effect. Additionally, a greater anti-tumor effect was seen in humanized compared to non-humanized mice, demonstrating that immune cells play a role in the effects of the NPRL2 nanoparticle therapy. Study findings suggest that NPRL2 gene therapy induces anti-tumor activity against KRAS/STK11 mutant tumors, which are resistant to many treatments, including Keytruda, through dendritic cell-mediated antigen presentation and cytotoxic immune cell activation.

Preclinical Studies with REQORSA in ALK+ NSCLC

Another abstract presented by our clinical collaborators at the 2024 AACR meeting supports further clinical study of REQORSA in Anaplastic Lymphoma Kinase (“ALK”)+ NSCLC, which are found in approximately 5% of patients with NSCLC. In this nonclinical study, TUSC2 expression in three ALK+ cell lines was evaluated before and after exposure to REQORSA, referred to as TUSC2 gene therapy in the abstract. Researchers in the University of Michigan Rogel Cancer Center Judith Tam ALK NSCLC research initiative found that overexpressing TUSC2 via REQORSA treatment in ALK+ lung cancer cell lines had the ability to inhibit colony formation by 50%, which indicates that REQORSA inhibits the growth of ALK+ cells. Researchers documented a strong pro-apoptotic response to TUSC2 expression (labeled QO in the figure where TUSC2 indicates transfection of TUSC2 expressing plasmid) in ALK+ NSCLC. The study found that the use of REQORSA to overexpress TUSC2 in ALK+ NSCLC cell lines was effective in decreasing cell growth and proliferation through the activation of apoptotic pathways. The findings suggest REQORSA therapy may be a potential therapy for ALK+ NSCLC and the researchers believe the results support further clinical study of REQORSA as an anti-ALK NSCLC treatment strategy. In October 2024, we entered into a sponsored research agreement with the University of Michigan Rogel Cancer Center to study TUSC2 in combination with ALK-inhibitors in ALK-EML4 positive translocated lung cancer mouse models. We also announced at that time our collaboration with ALK Positive, a non-profit patient-driven research organization dedicated to improving the life expectancy and quality of life for ALK+ lung cancer patients. As a part of this collaboration, both Genprex and ALK Positive will share the cost of the sponsored research agreement with the University of Michigan Rogel Cancer Center. In November 2024, we entered into an exclusive license agreement with the University of Michigan, which granted us a worldwide, exclusive license to the University of Michigan’s patent rights in a pending patent application relating to REQORSA in combination with ALK-inhibitors for the treatment of ALK-EML4 positive translocated lung cancer.

Preclinical Studies with REQORSA in Mesothelioma

Malignant Pleural Mesothelioma (“MPM”) is a rare, highly aggressive, asbestos-associated cancer with a median survival of 10-12 months. At least one of the normal two copies of the TUSC2 gene is absent in 36% of MPM. We and our research collaborators at New York University Langone Health are investigating whether TUSC2 transfection could modulate MPM aggressive properties, and Genprex has supported these studies with a sponsored research agreement. At the EORTC-NCI-AACR symposium in October 2024, our research collaborators delivered a poster presentation that demonstrated that REQORSA treatment resulted in significant decrease in cell proliferation, cell invasion, and a significant increase in cell apoptosis in four MPM cell lines. The four MPM cell lines and the non-malignant tert-transformed mesothelial LP9 cell line were treated with REQORSA and control liposomes for 48 hours. Treated cells were then evaluated for TUSC2 expression by semi quantitative RTPCR, Western blot analysis, and functional assays including cell proliferation, invasion, and apoptosis. RTPCR and Western blot analysis documented the successful expression of TUSC2 in all five cell lines. With REQORSA treatment, there was a marked decrease in cell proliferation and cell invasion in the 4 MPM cell lines, but not in the non-malignant LP9 cells. With REQORSA treatment (Quar Oze in the figure), there was also a marked increase in apoptosis in the 4 MPM cell lines, but not in the non-malignant LP9 cells (See figure below). Our collaborators concluded that the potent tumor-suppressive activity of the TUSC2 gene delivered by REQORSA could serve as a potential therapeutic strategy for the treatment of MPM.

Preclinical Studies with REQORSA in Ras Inhibitor Resistant NSCLC

Acquired resistance (“AR”) to sotorasib, the first FDA-approved KRASi, poses a significant challenge in the treatment of KRASG12C mutant NSCLC. Despite an initial response rate of up to 40%, research indicates that patients invariably develop resistance, necessitating alternative therapeutic strategies. In data presented at the October 2024 EORTC-NCI-AACR symposium, Genprex collaborators at MD Anderson demonstrated research that TUSC2 transfection and REQORSA treatment effectively overcomes sotorasib AR in KRAS-G12C mutant NSCLC in vitro and in vivo models.

Sotorasib-resistant cell lines and sotorasib-resistant patient derived xenografts (“PDX”) in mice were generated. TUSC2 transfection significantly reduced colony formation in two AR cell lines. Transfection of cell lines with TUSC2 also markedly increased apoptosis in AR cells. REQORSA alone exhibited significantly strong antitumor effect on PDXs where sotorasib showed no significant antitumor activity. To further evaluate the antitumor immune responses, immune-competent humanized-NSG mice were generated to produce mice with human immune cells. REQORSA (labeled TUSC2 in the figure below) was found to overcome AR resistance by inducing antitumor immunity to PDXs in a humanized mouse model. The collaborators concluded that REQORSA therapy, alone or in combination with sotorasib, induced apoptosis, inhibited colony formation, and showed significant antitumor efficacy in KRAS-G12C mutant acquired resistant cell lines and PDX tumors, and thus could potentially be a treatment for sotorasib resistant KRAS-G12C NSCLC.

Preclinical Studies with REQORSA in Glioblastoma

Glioblastoma (“GBM”) is the most common and deadliest primary brain tumor in adults and is associated with a poor prognosis. Genprex collaborators used patient-derived GBM cell lines and patient-derived glioma stem cell (“PD-GSC”) lines to evaluate the effects of REQORSA on GBM in data presented at the 2024 EORTC-NCI-AACR symposium. Research indicates that REQORSA treatment significantly reduced GBM cell viability. REQORSA also strongly suppressed the glioma stem cell population that is highly resistant to therapy (see figure below) and REQORSA induced significant apoptosis in GBM and PD-GSC cells. Since GBM cells are highly infiltrative, GBM cell migration was evaluated. The migration assay results demonstrated that REQORSA suppressed GBM cell migration independent of its ability to suppress cell viability. The collaborators concluded that REQORSA demonstrated promising in vitro efficacy in GBM and PD-GSCs, and that these studies merited additional work on REQORSA’s effects on GBM.

Diabetes

In September 2024, we announced that we were considering various strategic alternatives and opportunities to enhance stockholder value, including evaluating ways to optimize our clinical and research programs and operational strategies, such as our intention to potentially transfer our diabetes clinical development program and our diabetes gene therapy assets into a new, initially wholly-owned subsidiary. In connection with this intended separation of the diabetes clinical development program, on February 18, 2025, the Company announced that it had formed a wholly-owned subsidiary, Convergen Biotech, Inc. (“Convergen”), to implement this initial step of the reorganization and facilitate the separation of the diabetes program. Convergen will focus on developing and commercializing GPX-002. The Company will retain its oncology clinical development programs and other oncology pipeline assets.

Process Development and Manufacturing

We have made substantial investment in manufacturing for our product candidates with the goal of mitigating the risks associated with the complex manufacturing required to deliver gene therapies. While we continue to use third-party contract development and manufacturing organizations (“CDMOs”) in the manufacture of our product candidates, we believe we have a competitive advantage in our field based on core competencies we have developed that we are leveraging in the manufacture of our product candidates. These core competencies include:

● Extensive and diverse internal and external consulting expertise;

● Risk assessment and remediation for FDA submissions;

● Novel and proprietary manufacturing processes;

● Management of supply chain for business continuity.

In our oncology program, we are now focused on preparing for commercial readiness for REQORSA. To date we have developed a robust manufacturing process for REQORSA through years of process development activities that we continue to improve with the dramatic development and expansion of advanced technologies in the nascent gene therapy sector. REQORSA is an immunogene therapy with two main components. The active agent in REQORSA is a DNA plasmid encoding the TUSC2 protein. The plasmid is encapsulated by non-viral DOTAP cholesterol lipoplexes. This system of using lipoplexes to deliver the tumor suppressor gene-expressing plasmids to cancer cells is referred to by us as our systemic, non-viral ONCOPREX Delivery System. REQORSA has been shown to be scalable at cGMP and can be stored for approximately 12 to 18 months for later use. Successful tech transfer of REQORSA from MD Anderson, where it was developed and previously manufactured, to CDMOs has been achieved as well as scale-up of our clinical grade manufacturing production in accordance with cGMP. As noted above, the clinical grade material is being used to supply our Acclaim-1, Acclaim-2 and Acclaim-3 clinical trials.

For our diabetes program, which is an earlier stage program than our oncology program, the technology transfer associated with the manufacture of our GPX-002 construct to an appropriate integrated network of CDMOs and other vendors from our academic collaborators at University of Pittsburgh has been successfully completed. Novel advanced technologies were incorporated in these processes to optimize the plasmid construct to increase stability of expression and modify the backbone to align with other plasmids used for AAV products. The new plasmid was cloned, purified, and manufactured and is currently being used in the manufacture of AAV. GPX-002 involves the delivery of the Pdx1 and MafA genes into the pancreas via the pancreatic duct utilizing an AAV vector. The Company also recently entered into a strategic collaboration with a CDMO to research an alternative second generation approach using a non-viral lipid nanoparticle delivery of our diabetes gene therapy drug candidate, which could allow for potential re-dosing patients to optimize treatment.

We manage our manufacturing arrangements with our CDMOs and other vendors through various agreements.

Intellectual Property

Patents and other proprietary rights such as trademarks and trade secrets are critical to our business and to our ability to successfully develop and commercialize our product candidates. Our goal is to obtain, maintain, enhance and enforce patent protection for our products, formulations, processes, methods and other proprietary technologies, preserve our trade secrets, and operate without infringing on the proprietary rights of other parties, both in the U.S. and in other countries. Our policy is to actively seek the broadest intellectual property protection possible for our product candidates, proprietary information, and proprietary technology through a combination of contractual arrangements, patents, trade secrets, trademarks, copyrights and regulatory exclusivity both in the U.S. and elsewhere in the world. Patents provide a period of exclusivity intended to make it more difficult for competitors to make, use or sell competing technologies. We additionally rely on regulatory protection afforded through data exclusivity, market exclusivity, orphan drug designation and/or patent term extensions, where available. We have developed and/or in-licensed numerous patents and pending patent applications that relate to compositions-of-matter, methods-of-use and other technologies and possess substantial know-how and trade secrets relating to the development of gene therapy technologies.

As further described in the “Licenses and Research Collaborations” section below, we hold a worldwide, exclusive license from MD Anderson to patents covering the therapeutic use of TUSC2 and other genes that have been shown to have cancer fighting properties, including 12 issued patents and 12 pending patent applications for technologies developed at MD Anderson and The University of Texas Southwestern Medical Center. These patents comprise various therapeutic, diagnostic, technical and processing claims relating to REQORSA and our ONCOPREX Delivery System. We expect these patents and patent applications, if issued, to expire from 2025 to 2038. The rights we have obtained pursuant to our license agreement with MD Anderson are made subject to the rights of the U.S. government to the extent that the technology covered by the licensed intellectual property was developed under a funding agreement between MD Anderson and the U.S. government. As further described in the “Licenses and Research Collaborations” section below, we also hold worldwide, exclusive licenses to an issued patent and 10 pending patent applications for diabetes technologies developed at the University of Pittsburgh. We expect these patents and patent applications, if issued, to expire from 2035 to 2044. As further described in the “Licenses and Research Collaborations” section below, we also hold a worldwide, exclusive license from the University of Michigan to their patent rights in a co-owned pending patent application relating to REQORSA in combination with ALK-inhibitors for the treatment of ALK-EML4 positive translocated lung cancer. We currently expect this patent application, if issued, to expire in 2045. We also are prosecuting 8 patent applications relating to various oncology targets in our discovery program, one of which is the application co-owned with the University of Michigan. In addition, for certain of our product candidates we also expect to have further exclusivity in the form of data and marketing exclusivity under pharmaceutical regulatory laws, including for example, potentially up to 12 years of exclusivity from the date of first BLA approval of our product candidates. For a further description and discussion of these laws, exclusivities and their regulatory background, please see the “Business – Government Regulation” section below in this Part I, Item 1 of this Annual Report.

We also have received trademark registrations for the trademarks GENPREX, REQORSA, and ONCOPREX and we have a pending application for the trademark CONVERGEN. For a discussion of the challenges we face in obtaining or maintaining patent, trademark and/or trade secret protection, please see the risk factors under the heading “Risks Related to Our Intellectual Property” in Part I, Item 1A of this Annual Report.

Licenses and Research Collaborations

Agreements with MD Anderson

Our ONCOPREX and REQORSA technologies are exclusively licensed pursuant to a Patent and Technology License Agreement dated July 20, 1994, with MD Anderson, as amended on September 1, 1996, August 11, 1997, July 31, 1994 and October 4, 2001 (collectively, the “1994 MD Anderson License Agreement”), between MD Anderson and Introgen Therapeutics, Inc. (f/k/a Intron Therapeutics, Inc.) (“Introgen”).

Pursuant to the 1994 MD Anderson License Agreement, we have rights to patents covering use of various genes, including the TUSC2 gene, for treatment of cancer, as well as know-how and related intellectual property.

The exclusive licenses under the 1994 MD Anderson License Agreement will continue until the expiration of all patents covered by such agreement. Upon the expiration of the exclusive licenses, we will have a non-exclusive, fully paid-up right and license to use and otherwise exploit the technology rights licensed under the agreement. MD Anderson may terminate the agreement for, among other things, a breach of the agreement by us which remains uncured.

Pursuant to a Technology Sublicense Agreement dated March 7, 2007 (“Sublicense Agreement”), Introgen sublicensed its rights under the 1994 MD Anderson License Agreement to Introgen Research Institute, Inc. (“IRI”). IRI is a Texas-based technology company formed by Rodney Varner, who prior to his passing in May 2024, was our President and Chairman of the Board and IRI’s sole officer. IRI is owned by trusts of which Mr. Varner’s descendants are the sole beneficiaries.

Pursuant to an Assignment and Collaboration Agreement dated April 13, 2009 (“IRI Collaboration Agreement”), IRI assigned its rights under the Sublicense Agreement to us, and we granted to IRI a non-exclusive, royalty-free license to use and practice the licensed technology for non-commercial research purposes. As consideration for this assignment, we agreed to assume all of IRI’s obligations to MD Anderson under the 1994 MD Anderson License Agreement, including ongoing patent related expenses and royalty obligations.

The IRI Collaboration Agreement was amended by an Amended Collaboration and Assignment Agreement dated July 1, 2011 (“2011 IRI Collaboration Agreement”). The 2011 Collaboration Agreement provided that IRI would provide additional licensing opportunities and services to us, in return for monthly payments and our obligation to pay to IRI a royalty of 1% on sales of products licensed to us under the 1994 MD Anderson License Agreement. In 2012, IRI’s obligation to provide those opportunities and services, and our obligation to make monthly payments to IRI, were terminated; however, we are required to pay a 1% royalty to IRI upon sales of products licensed to us under the 1994 MD Anderson License Agreement which royalty obligation continues for 21 years after the later of the termination of the 1994 MD Anderson License Agreement and the termination of the sublicense assigned by IRI to us.

Pursuant to a Technology Sublicense Agreement dated June 1, 2011, we granted to IRI a non-exclusive sublicense, for non-commercial purposes, to the rights under the Sublicense Agreement.

At the time that we entered into the 2011 IRI Collaboration Agreement, Mr. Varner was not an officer or director of Genprex, but he was deemed to be an “affiliate” of the Company due to his beneficial ownership at that time of approximately 39% of our issued and outstanding shares. At the time we acquired the ONCOPREX and REQORSA technologies under the 2009 IRI Collaboration Agreement, they were the subject of the Phase 1 Monotherapy Trial. We completed the Phase 1 Monotherapy Trial and did substantial process development, manufacturing and regulatory work necessary to bring the technologies into a Phase 1/2 combination trial.

Pursuant to the 1994 MD Anderson License Agreement, the Sublicense Agreement and the 2009 IRI Collaboration Agreement, we are obligated to pay all fees, patent related expenses, royalties, and other amounts that become due with respect to the licensed patents, patent application and other technologies. We are also obligated to pay to MD Anderson royalties of 1.5% of net sales of the licensed products, as well as 1.5% of advance payments received by us (excluding amounts paid to us in reimbursement of development or other costs) from third parties pursuant to sublicense, marketing, distribution or franchise arrangements. Under the 2011 IRI Collaboration Agreement, we are obligated to pay to IRI a royalty of 1.0% of net sales of licensed products and 1.0% of certain other payments received by us. This royalty obligation continues for 21 years after the later of the termination of the 1994 MD Anderson License Agreement and the termination of the Sublicense Agreement. We have no other payment obligations to IRI under the 2009 IRI Collaboration Agreement or the 2011 IRI Collaboration Agreement. We were not required to make any up-front payments to MD Anderson or IRI when we entered into the 1994 MD Anderson License Agreement, the Sublicense Agreement or the 2009 IRI Collaboration Agreement.

On May 4, 2020 (the “MD Effective Date”), we entered into a Patent and Technology License Agreement with MD Anderson, as amended on March 3, 2021 (collectively, the “2020 License Agreement” and together with the 1994 MD Anderson License Agreement, collectively, the “MD Anderson License Agreements”). Pursuant to the 2020 License Agreement, MD Anderson granted us a worldwide, exclusive, sublicensable, royalty-bearing license to certain licensed intellectual property and technology, including, without limitation, use of chemotherapy in combination with TUSC2 therapy and methods for treating cancer by administration of a TUSC2 in conjunction with EGFR inhibitors or other anti-cancer therapies in patients that are expected to be responsive to TUSC2 therapy (collectively, the “Licensed IP”), to manufacture, use, commercialize, seller, offer for sale and import licensed products related to the treatment of cancer using TUSC2 therapy in combination with certain immunotherapies (the “Licensed Products”). In consideration for our use of the Licensed IP, we are required to make certain payments to MD Anderson, including, without limitation, an upfront license fee as well as a fee paid to amend the agreement, annual maintenance fees ranging from the low five figures to low six figures, milestone payments aggregating up to a maximum of $6,150,000, low single digit royalty payments to low double digits royalty payments with lower net sales being subject to lower royalty payments, and minimum annual royalties after the first sale in a low six figure amount. In addition, we shall be required to reimburse MD Anderson for certain patent expenses. The 2020 License Agreement will expire on the later to occur of (a) the expiration of all patents issued under the Licensed IP and the cancellation, withdrawal, or express abandonment of all patent applications under the Licensed IP, or (b) 30 years after the MD Effective Date, unless earlier terminated pursuant to the terms thereof.

See also “Note 7 – Commitments and Contingencies” to our financial statements included in this Annual Report on Form 10-K.

License Agreement with P53, Inc.

On February 26, 2010, IRI and P53, Inc., which subsequently changed its name to MultiVir Inc. (“P53”), entered into a Technology License Agreement (“P53 License Agreement”) pursuant to which IRI granted to P53 a worldwide, exclusive license under certain patents related to the ONCOPREX Delivery System that we are now using for the delivery of TUSC2, but only for P53’s use in gene therapy products in which the sole active genes are P53 and MDA-7. As a result of the 2009 IRI Collaboration Agreement, we are the licensor under the P53 License Agreement.

The P53 License Agreement authorizes P53 to develop, make and have made, use, offer for sale, sell, import and otherwise distribute the licensed products. As consideration for the P53 License Agreement, P53 agreed to pay IRI one-half of all amounts invoiced by MD Anderson to IRI, up to a maximum of $15,000 to be paid by P53, for patent prosecution expenses incurred prior to the effective date of the P53 License Agreement, as well as two-thirds of IRI’s ongoing patent prosecution expenses, in each case with respect to the licensed patents. Additionally, P53 agreed to pay all amounts that become due to IRI as a result of the P53 License Agreement or the sales, licensing, or other activities of P53 under the P53 License Agreement. Pursuant to the P53 License Agreement, P53 has granted to IRI a fully paid license with respect to improvements made by P53 to the technology licensed to P53 under the P53 License Agreement. The P53 License Agreement remains in effect until the expiration of the last of the patents licensed under the agreement. The last licensed patent under the P53 License Agreement will expire in April 2025. We may terminate the agreement for, among other things, P53’s breach of the agreement or if P53 challenges the validity or enforceability of any of the licensed patents. P53 may terminate the agreement upon 90 days’ written notice.

License Agreement with the Regents of the University of Michigan

On November 11, 2024, the Company and the Regents of the University of Michigan (“UM”) entered into a Patent License Agreement (“UM License Agreement”), which granted Genprex a worldwide, exclusive license to the University of Michigan’s patent rights in a co-owned patent application relating to the use of REQORSA in combination with ALK-inhibitors for the treatment of ALK-EML4 positive translocated lung cancer (collectively, the “UM Licensed Products”). As consideration for the UM License Agreement, Genprex agreed to pay UM an initial license issue fee, running low single digit percentage royalties, minimum annual royalties in a fixed cash amount, a tiered double digit percentage share of non-royalty sublicense income, and certain potential clinical milestone payments through FDA regulatory approval up to an aggregate of approximately $350,000 in addition to certain potential commercial sales milestones. Genprex will use commercially reasonable efforts to bring the UM Licensed Products to market as soon as practicable, and continue active marketing efforts for the Licensed Products throughout the term of the UM License Agreement, and to achieve certain milestones within specified time periods. Genprex has agreed to submit semi-annual progress reports to UM including reports of manufacturing, sales and sublicense activities to UM.

License Agreement with University of Pittsburgh - Of the Commonwealth System of Higher Education

As noted above, on February 17, 2025, the Company and UP entered into an amended and restated Exclusive License Agreement (the “New UP License Agreement”), which updates and consolidates into a single agreement the Prior License Agreements (as defined below). The New UP License Agreement effectuates the termination of, and amends, restates, replaces and supersedes the prior license agreements between Genprex and UP, except that the Company’s prior license from UP dated November 22, 2022, which covered the macrophage technology is being terminated in its entirety and is not incorporated into or covered by the New UP License Agreement. The New UP License Agreement authorizes Genprex (including any affiliate of Genprex) to make, have made, use and sell the Licensed Technology and to practice under the patent rights in the field of diabetes therapy. Genprex will use its best efforts to bring the Licensed Technology to market as soon as practicable, and continue active marketing efforts for the Licensed Technology throughout the term of the New UP License Agreement, and to achieve certain milestones within specified time periods. Genprex has agreed to submit annual progress reports to UP and, quarterly reports of manufacturing, sales and sublicense activities to UP.

UP has reserved the royalty-free, nonexclusive right to practice the patent rights and know-how and to use the Licensed Technology for non-commercial education and research purposes, and Genprex has agreed to sell products and/or services resulting from Licensed Technology to UP and its affiliates upon request at the price and terms as are made available to Genprex’s most favored customer. The licenses granted to Genprex under the New UP License Agreement are subject to the rights of the U.S. government, which may have acquired a nonexclusive, nontransferable, paid up license to practice or have practiced for or on behalf of the United States the inventions described in the patent rights throughout the world. As consideration for the New UP License Agreement, Genprex agreed to pay UP an initial license fee, annual maintenance fees, running low single digit percentage royalties, minimum annual royalties in a fixed cash amount, a low double digit percentage share of non-royalty sublicense income, and certain milestone payments up to an aggregate of approximately $4,825,000, as well as patent prosecution expenses incurred prior to and after the effective date of the New UP License Agreement.

The New UP License Agreement remains in effect until the later of 20 years after the first commercial sale of the Licensed Technology or the expiration of the last valid claim of the patents licensed under the New UP License Agreement. UP may terminate the agreement in the event of Genprex’s uncured default for thirty (30) days following notice thereof from UP, failure to achieve the specified milestones within the specified time period, or practice of the licensed patent rights or know-how outside the field of diabetes therapy, or if Genprex ceases to carry out its business, becomes bankrupt or insolvent, applies for or consents to the appointment of a trustee, receiver or liquidator of its assets or seeks relief under any law for the relief of debtors. Genprex may terminate the New UP License Agreement upon six months prior written notice to UP and payment of all amounts accrued or due to UP through the effective date of termination.

See also “Note 7 – Commitments and Contingencies” and “Note 10 – Subsequent Events” to our financial statements included in this Annual Report on Form 10-K.

Grants

Our technology discoveries and research and development programs have been the subject of numerous peer-reviewed publications and have been supported by Small Business Innovation Research ("SBIR") grants and grants from the National Institutes of Health ("NIH"), the United States Department of Treasury, and the State of Texas through its Texas Emerging Technology Fund. The rights we have obtained pursuant to our MD Anderson License Agreements are made subject to the rights of the U.S. government to the extent that the technology covered by the licensed intellectual property was developed under a funding agreement between MD Anderson and the U.S. government. Our collaborators at University of Pittsburgh have also received grants from the NIH in connection with preclinical work on GPX-002 and so, the rights we have obtained pursuant to our New UP License Agreement are made subject to the rights of the U.S. government to the extent that the technology covered by the licensed intellectual property was developed under a funding agreement between the University of Pittsburgh and the U.S. government. The Trump Administration recently announced a 15% cap on the indirect cost portion of existing and future NIH grants. Generally, indirect costs average above 30% for NIH grant recipients and many are substantially higher. The 15% cap is being challenged in lawsuits and has been temporarily suspended. Changes in government funding for our collaborators may significantly impact their ability to conduct research. We are monitoring and evaluating the situation.

Competition

The biotechnology and pharmaceutical industries are intensely competitive and subject to rapid and significant technological change. There is also a strong emphasis on intellectual property and proprietary products. We have domestic and international competitors including major multinational pharmaceutical companies, established biotechnology companies, specialty pharmaceutical and generic drug companies and universities and other research institutions. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies.

Currently, there are a number of drugs approved and under development for treatment of lung cancer. Treatments competitive with our primary product candidates generally fall into the following categories: chemotherapies such as cisplatin, carboplatin, docetaxel and pemetrexed; targeted therapies such as Tarceva, Iressa, Gilotrif, and Tagrisso, and immunotherapies such as checkpoint inhibitors and CAR and CAR T cells, and oncolytic virus-based technology. Any such competing therapy may be more effective and/or cost-effective than ours.

Type 1 diabetes is an autoimmune disease that permanently destroys beta cells of the pancreatic islet leading to the body no longer having the ability to produce insulin. Type 2 diabetes, also known as adult onset diabetes, is a condition associated with developed resistance to insulin. There are a number of approved treatments and therapies to manage diabetes including insulin, insulin analogs, continuous glucose monitoring, novel approaches to administration such as insulin pens and insulin pumps, and preventative therapeutics. There are also cellular therapies that have the potential to provide allogeneic beta cells that secrete insulin. Any of these therapies may be more effective, cost-effective, or considered less invasive than ours.

Many of our competitors have greater financial and other resources, such as larger research and development staff and more experienced marketing and manufacturing organizations than we do. Large pharmaceutical companies, in particular, have extensive experience in clinical testing, obtaining regulatory approvals, recruiting patients and manufacturing pharmaceutical products. These companies also have significantly greater research, sales and marketing capabilities and collaborative arrangements in our target markets with leading companies and research institutions. Established pharmaceutical companies may also invest heavily to accelerate discovery and development of novel compounds or to in-license novel compounds that could make the product candidates that we develop obsolete. As a result of these factors, our competitors may succeed in obtaining patent protection and/or FDA approval or discovering, developing and commercializing drugs for the cancer indications that we are targeting before we do or may develop drugs that are deemed to be more effective or gain greater market acceptance than ours. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large, established companies. In addition, many universities and private and public research institutes may become active in our target disease areas. Our competitors may succeed in developing, acquiring or licensing on an exclusive basis, technologies and drug products that are more effective or less costly than any product candidates that we are currently developing or that we may develop, which could render our products obsolete or noncompetitive. Any product candidates that we successfully develop and commercialize may compete with existing and new therapies that may become available in the future. The availability of reimbursement from government and other third-party payers will also significantly affect the pricing and competitiveness of our products. For a further discussion of the challenges we face from competition, please see the "Risk Factors" section in Part I, Item 1A of this Annual Report.

Government Regulation

Government authorities in the U.S., at the federal, state and local level, and other countries extensively regulate, among other things, the research, development, testing, manufacture, quality control, approval, labeling, packaging, storage, recordkeeping, promotion, advertising, distribution, post-approval monitoring and reporting, marketing and export and import of products such as those we are developing. The pharmaceutical drug product candidates that we develop must be approved by the FDA before they may be legally marketed.

In the United States, the FDA regulates pharmaceutical products under the Federal Food, Drug, and Cosmetic Act (“FDCA”) and implementing regulations and other federal, state and local statutes and regulations. In the case of biologics, the section of the FDCA that governs the approval of drugs via New Drug Applications (“NDAs”) does not apply to the approval of biologics. Rather, biologics, such as gene therapy products, are approved for marketing under provisions of the Public Health Service Act (“PHSA”) via a Biologics License Application (“BLA”). However, the application process and requirements for approval of BLAs are very similar to those for NDAs. The process of obtaining regulatory approvals and the subsequent compliance with appropriate federal, state, local and foreign statutes and regulations require the expenditure of substantial time and financial resources. Failure to comply with the applicable U.S. requirements at any time during the product development process, the approval process or after approval, may subject an applicant to administrative or judicial sanctions. FDA sanctions could include refusal to approve pending applications, withdrawal of an approval, a clinical hold, warning or untitled letters, product recalls, product seizures, total or partial suspension of production or distribution injunctions, fines, refusals of government contracts, restitution, disgorgement and civil and criminal penalties.

U.S. Biological Products Development Process

The process required by the FDA before a biological product, including our REQORSA, GPX-002, and potential future product candidates, may be marketed in the United States generally involves the following:

● FDA review and approval, or licensure, of the BLA.

Within the FDA, the Center for Biologics Evaluation and Research (“CBER”) regulates gene therapy products. The FDA has published guidance documents related to, among other things, gene therapy products in general, their preclinical assessment, observing patients involved in gene therapy studies for delayed adverse events, potency testing, and chemistry, manufacturing and control information in gene therapy INDs.

Before testing any product candidate, including a gene therapy product, in humans, the product candidate enters the preclinical testing stage. Preclinical tests, which are a subset of nonclinical studies, include laboratory evaluations of product chemistry, toxicity and formulation, as well as animal studies to assess the potential safety and activity of the product candidate. The conduct of certain preclinical tests must comply with federal regulations and requirements, including GLPs.

The clinical trial sponsor must submit the results of the preclinical tests, together with manufacturing information, analytical data, any available clinical data or literature and a proposed clinical protocol, to the FDA as part of the IND. Some nonclinical testing usually continues after the IND is submitted. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA places the clinical trial on a clinical hold within that 30-day time period. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. The FDA may also impose clinical holds on a product candidate at any time before or during clinical trials due to safety concerns or non-compliance. If the FDA imposes a clinical hold, trials may not recommence without FDA authorization and then only under terms authorized by the FDA.

Clinical trials involve the administration of the product candidate to volunteers or patients under the supervision of qualified investigators, generally physicians not employed by or under the clinical trial sponsor’s control. Clinical trials are conducted under protocols detailing, among other things, the objectives of the clinical trial, dosing procedures, patient selection and exclusion criteria, effectiveness criteria to be evaluated, and the parameters to be used to monitor patient safety, including stopping rules that assure a clinical trial will be stopped if certain adverse events occur. Each protocol and any amendments to the protocol must be submitted to the FDA as part of the IND. Clinical trials must be conducted and monitored in accordance with the FDA’s regulations comprising the GCP requirements, including the requirement that all patients provide informed consent. The FDA may order the temporary or permanent discontinuation of a clinical trial at any time, or impose other sanctions, if it believes that the clinical trial either is not being conducted in accordance with FDA regulations or presents an unacceptable risk to the clinical trial patients.

Further, each clinical trial must be reviewed and approved by an independent institutional review board (“IRB”) at or servicing each institution or site at which the clinical trial will be conducted. An IRB is charged with protecting the welfare and rights of clinical trial participants and considers such items as whether the risks to individuals participating in the clinical trials are minimized and are reasonable in relation to anticipated benefits. The IRB also approves the form and content of the informed consent, which must be signed by each clinical trial patient or his or her legal representative, and must monitor the clinical trial until completed. Clinical trials involving biological product candidates also must be reviewed by an institutional biosafety committee (“IBC”), a local institutional committee that reviews and oversees basic and clinical research conducted at that institution. The IBC assesses the safety of the research and identifies any potential risk to public health or the environment.

Clinical trials to support BLAs for marketing approval are typically conducted in three sequential phases that may overlap or be combined:

In most cases, the FDA requires two adequate and well-controlled Phase 3 clinical trials to demonstrate the efficacy of the drug. A single trial may be sufficient in some instances, including (1) where the study is a large multicenter trial demonstrating internal consistency and a statistically very persuasive finding of a clinically meaningful effect on mortality, irreversible morbidity or prevention of a disease with a potentially serious outcome and confirmation of the result in a second trial would be practically or ethically impossible or (2) when there is one adequate and well-controlled clinical investigation plus other confirmatory evidence. Typically, during the development of oncology therapies, all subjects enrolled in Phase 1 clinical trials are disease-affected patients and, as a result, considerably more information on clinical activity may be collected during such trials than during Phase 1 clinical trials for non-oncology therapies. A single pivotal trial may be sufficient in rare instances to provide substantial evidence of effectiveness (generally subject to the requirement of additional post-approval studies).

In addition, the manufacturer of an investigational biologic in a Phase 2 or Phase 3 clinical trial for a serious or life-threatening disease is required to make available, such as by posting on its website, its policy on evaluating and responding to requests for expanded access to such investigational biologic.

Post-approval clinical trials, sometimes referred to as Phase 4 clinical trials, may be conducted after initial marketing approval. These clinical trials are used to gain additional experience from the treatment of patients in the intended therapeutic indication, particularly for long-term safety follow-up. The FDA recommends that sponsors observe patients for potential gene therapy-related delayed adverse events with agents such as those we are developing for a period of up to 15 years, including a minimum of five years of annual examinations followed by ten years of annual queries, either in person or by questionnaire, of clinical trial patients.

During all phases of clinical development, regulatory agencies require extensive monitoring and auditing of all clinical activities, clinical data, and clinical trial investigators. Annual progress reports detailing the results of the clinical trials must be submitted to the FDA. Written IND safety reports must be promptly submitted to the FDA, and the investigators for serious and unexpected adverse events, any findings from other trials, tests in laboratory animals or in vitro testing that suggest a significant risk for human patients, or any clinically important increase in the rate of a serious suspected adverse reaction over that listed in the protocol or investigator brochure. The sponsor must submit an IND safety report within 15 calendar days after the sponsor determines that the information qualifies for expedited reporting. The sponsor must also notify the FDA of any unexpected fatal or life-threatening suspected adverse reaction within seven calendar days after the sponsor’s initial receipt of the information. Phase 1, Phase 2 and Phase 3 clinical trials may not be completed successfully within any specified period, if at all. The FDA, the sponsor, or its data safety monitoring board may suspend a clinical trial at any time on various grounds, including a finding that the patients are being exposed to an unacceptable health risk. Similarly, an IRB can suspend or terminate approval of a clinical trial at its institution if the clinical trial is not being conducted in accordance with the IRB’s requirements or if the investigational product candidate has been associated with unexpected serious harm to patients.

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