On April 30, 2025 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, reported that its research collaborators presented positive preclinical data for Reqorsa Gene Therapy (quaratusugene ozeplasmid), for the treatment of KRASG12C mutant non-small cell lung cancer (NSCLC) (Press release, Genprex, APR 30, 2025, View Source [SID1234652385]).

Schedule your 30 min Free 1stOncology Demo!
Discover why more than 1,500 members use 1stOncology™ to excel in:

Early/Late Stage Pipeline Development - Target Scouting - Clinical Biomarkers - Indication Selection & Expansion - BD&L Contacts - Conference Reports - Combinatorial Drug Settings - Companion Diagnostics - Drug Repositioning - First-in-class Analysis - Competitive Analysis - Deals & Licensing

                  Schedule Your 30 min Free Demo!

This data were presented at the 2025 American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting being held April 25-30, 2025 in Chicago, Illinois.

"We are pleased to have this positive preclinical data presented before an audience of the world’s leading cancer researchers, which provides further support for the therapeutic potential of REQORSA both alone and in combination with targeted therapies in NSCLC," said Ryan Confer, President and Chief Executive Officer at Genprex. "We believe REQORSA could be a potential therapeutic treatment for Ras inhibitor resistant lung cancer either alone or in combination with Ras inhibitors, and these studies support the potential expansion of future clinical studies in our pipeline."

The featured Genprex-supported poster presented at AACR (Free AACR Whitepaper) 2025:

Title: Overcoming sotorasib acquired resistance in KRASG12C mutant NSCLC by TUSC2 gene therapy

Session Category: Experimental and Molecular Therapeutics

Session Title: Drug Resistance in Molecular Targeted Therapies 3

Session Date and Time: Tuesday, April 29 from 2-5 p.m. CT

Location: Poster Section 17

Poster Board Number: 12

Abstract Presentation Number: 5517

In the poster, entitled, "Overcoming sotorasib acquired resistance in KRASG12C mutant NSCLC by TUSC2 gene therapy," researchers demonstrated that TUSC2 gene therapy (REQORSA) effectively overcomes sotorasib (LUMAKRAS) acquired resistance (AR) in KRASG12C mutant NSCLC mouse xenografts. The data indicate that TUSC2 transfection significantly reduced colony formation and markedly increased apoptosis in two AR cell lines. Re-expression of TUSC2 in AR PDXOs significantly decreased the viability of organoids compared with the empty vector. The H23AR tumors exhibited significantly lower sensitivity to sotorasib than their parental counterparts. However, treatment with REQORSA was highly effective in controlling tumor growth compared to treatment with sotorasib alone or the control groups. REQORSA alone also exhibited a strong antitumor effect on TC314AR PDXs. Sotorasib alone showed no significant antitumor activity in these models. However, a synergistic antitumor effect was observed when TC314AR PDX tumors were treated with the combination of REQORSA and sotorasib. In conclusion, researchers demonstrated that REQORSA, alone or in combination with sotorasib, induced apoptosis, inhibited colony formation, and showed significant antitumor efficacy in KRASG12C mutant sotorasib-acquired resistant xenograft and PDX tumors.

This AACR (Free AACR Whitepaper) poster has been made available on Genprex’s website at www.genprex.com.

About Reqorsa Gene Therapy

REQORSA (quaratusugene ozeplasmid) consists of a plasmid containing the TUSC2 gene encapsulated in non-viral lipid-based nanoparticles in a lipoplex form (the Company’s Oncoprex Delivery System), which has a positive charge. REQORSA is injected intravenously and specifically targets cancer cells. REQORSA is designed to deliver the functioning TUSC2 gene to negatively charged cancer cells while minimizing uptake by normal tissue. 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.