Genprex Announces Positive Clinical Study Updates from Acclaim-1 and Acclaim-3 Phase 1/2 Clinical Trials in Lung Cancer
Genprex Announces Positive Clinical Study Updates from Acclaim-1 and Acclaim-3 Phase 1/2 Clinical Trials in Lung Cancer |
[14-August-2024] |
Demonstrates Prolonged Progression Free Survival of Two Patients in Acclaim-1 and Partial Remission from Maintenance Therapy in Acclaim-3 Re-focuses Oncology Clinical Development Program and Advances Work to Establish Biomarkers to Enrich Clinical Trial Patient Populations AUSTIN, Texas, Aug. 14, 2024 /PRNewswire/ -- Genprex, Inc. ("Genprex" or the "Company") (NASDAQ: GNPX), a clinical-stage gene therapy company focused on developing life-changing therapies for patients with cancer and diabetes, today announced positive clinical study updates for its Acclaim-1 and Acclaim-3 clinical trials for the treatment of non-small cell lung cancer (NSCLC) and small cell lung cancer (SCLC), respectively, and plans to re-focus its oncology clinical development program. Patients in the Company's lung cancer clinical trials are being treated with the Company's lead drug candidate, Reqorsa® (quaratusugene ozeplasmid) Gene Therapy. Two patients in the Acclaim-1 study have had prolonged Progression Free Survival (PFS) and importantly, the first treated patient in the Acclaim-3 study attained a Partial Remission (PR) from the start of maintenance therapy. Ryan Confer, President and Chief Executive Officer of Genprex, commented on the update: Acclaim-1 The Acclaim-1 clinical trial is evaluating the combination of REQORSA and AstraZeneca's Tagrisso® to treat patients with late-stage NSCLC who have activating EGFR mutations and disease progression after treatment with Tagrisso. The Acclaim-1 clinical trial has received an U.S. Food and Drug Administration (FDA) Fast Track Designation for late-stage NSCLC patients whose disease progressed after treatment with Tagrisso. Two patients from the Phase 1 dose escalation portion of the study have had prolonged PFS and are still continuing to receive treatment on the study. One of them has received the treatment combination of REQORSA and Tagrisso for more than two years. This patient, who was previously treated with Tagrisso and chemotherapy and who continues to receive REQORSA and Tagrisso treatment, attained a PR after the second course of REQORSA and Tagrisso, and has maintained this response for more than two years. The second patient has had stable disease without disease progression for more than 15 months, and is also continuing to receive REQORSA and Tagrisso treatment. Mark Berger, MD, Chief Medical Officer of Genprex, discussed the positive outcomes: The Phase 2a expansion portion of the study was designed to have two cohorts with 33 patients each. One cohort was for patients who have previously received only Tagrisso treatment, and one cohort was for patients who had previously received both Tagrisso treatment and chemotherapy. Based on resource prioritization and to focus on the patients for whom REQORSA is most likely to show a benefit, the Company has decided to limit its enrollment efforts moving forward to patients who received only prior Tagrisso treatment and to cease enrollment of the second cohort (patients who received prior Tagrisso treatment and chemotherapy). The Phase 2a expansion portion of the trial with one cohort is now expected to enroll approximately 33 patients. 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. Genprex will conduct an interim analysis following the treatment of 19 patients in the Phase 2a expansion portion who had previously received only Tagrisso treatment. The Company expects to complete the enrollment of the first 19 patients in the Phase 2a expansion portion of the study and conduct an interim analysis in the first half of 2025. Acclaim-3 The Acclaim-3 clinical trial is evaluating the combination of REQORSA and Genentech's Tecentriq® as a maintenance therapy to treat patients with extensive stage small cell lung cancer (ES-SCLC) who did not develop tumor progression after receiving Tecentriq and chemotherapy as initial standard treatment. The FDA has granted Fast Track Designation for the Acclaim-3 population of patients and has also granted Orphan Drug Designation for the treatment of SCLC. In this study, patients receive maintenance therapy with REQORSA and Tecentriq until disease progression or unacceptable toxicity is experienced. Following completion of the Phase 1 dose escalation portion of the study, which the Company expects to complete during the second half of 2024, Genprex then expects to start the Phase 2 expansion portion of the study in the second half of 2024. The first patient treated in the Phase 1 dose escalation portion of the Acclaim-3 clinical trial experienced an initial positive response after enrollment and dosing commenced in May. The patient had a PR, which is defined as at least a thirty percent (30%) decrease in tumor size, from the time the patient had a baseline CT scan after induction therapy and prior to the start of maintenance therapy, to the time of the CT scan performed after two cycles of maintenance therapy. As the maintenance therapy consists of REQORSA and Tecentriq, and the patient had already received four cycles of Tecentriq during induction therapy and thus responses to Tecentriq would likely have occurred earlier, which suggests that REQORSA may be providing clinical benefit. A recent CT scan, performed after four cycles of maintenance therapy (three months), confirms 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 three months. Dr. Berger commented on these compelling results: Genprex's novel cancer treatment platform re-expresses tumor suppressor genes in cancers. Tumor suppressor genes are often deleted or inactivated early in the process of cancer development. The key component of REQORSA is a plasmid that expresses TUSC2, a tumor suppressor gene protein which plays a vital role in cancer suppression and normal cell metabolism. Nearly 100% of SCLCs have reduced or no TUSC2 protein expression, and 41% completely lack TUSC2 protein expression, thus restoring TUSC2 expression in SCLC has a strong biologic rationale. Nonclinical studies in mice support the hypothesis that re-expressing the TUSC2 protein in combination with Tecentriq may lead to improved clinical efficacy in SCLC. Oncology Program Update Mr. Confer and the executive team have evaluated resource allocations to ensure streamlined, focused strategies to support expeditious regulatory submissions for REQORSA and will implement the following changes to the Company's oncology clinical development plans in order to prioritize resources and focus on the most promising aspects of the Acclaim-1 and Acclaim-3 lung cancer clinical trials.
Commenting on the decision, Mr. Confer stated: Additionally, Genprex reports that the Company is collaborating with an academic research partner to discover, develop and utilize biomarkers to:
The Company's academic research partner is currently analyzing biomarkers that would indicate lack of response in lung cancer that could enrich the Company's population of responders in its clinical trials and enhance patient screening and enrollment in order to increase the likelihood of potential success of the Acclaim studies. About Genprex, Inc. Interested investors and shareholders are encouraged to sign up for press releases and industry updates by visiting the Company Website, registering for Email Alerts and by following Genprex on Twitter, Facebook and LinkedIn. Cautionary Language Concerning Forward-Looking Statements Because forward-looking statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. Such statements include, but are not limited to, statements regarding: the initial patient responses to REQORSA treatments and the potential and promise of these responses, which are demonstrating early evidence of efficacy with a favorable safety profile; Genprex's ability to advance the clinical development, manufacturing and commercialization of its product candidates in accordance with projected timelines and specifications; the timing and success of Genprex's clinical trials and regulatory approvals; the effect of Genprex's product candidates, alone and in combination with other therapies, on cancer and diabetes; the effects of any strategic research and development prioritization initiatives, and any other efforts that Genprex takes or may take in the future that are aimed at optimizing and re-focusing Genprex's oncology and/or other clinical development programs including prioritization of resources, and the extent to which Genprex is able to implement such efforts and initiatives successfully to achieve the desired and intended results thereof; Genprex's future growth and financial status, including Genprex's ability to maintain compliance with the continued listing requirements of The Nasdaq Capital Market and to continue as a going concern and to obtain capital to meet its long-term liquidity needs on acceptable terms, or at all; Genprex's commercial and strategic partnerships, including those with its third party vendors, suppliers and manufacturers and their ability to successfully perform and scale up the manufacture of its product candidates; and Genprex's intellectual property and licenses. These forward-looking statements should not be relied upon as predictions of future events and Genprex cannot assure you that the events or circumstances discussed or reflected in these statements will be achieved or will occur. If such forward-looking statements prove to be inaccurate, the inaccuracy may be material. You should not regard these statements as a representation or warranty by Genprex or any other person that Genprex will achieve its objectives and plans in any specified timeframe, or at all. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release. Genprex disclaims any obligation to publicly update or release any revisions to these forward-looking statements, whether as a result of new information, future events or otherwise, after the date of this press release or to reflect the occurrence of unanticipated events, except as required by law. Genprex, Inc. GNPX Investor Relations GNPX Media Contact
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Company Codes: NASDAQ-NMS:GNPX |