SEATTLE--(BUSINESS WIRE)--Introgen Therapeutics, Inc. (NASDAQ:INGN) reported promising Phase 1/2 clinical data with INGN 241, the Company’s novel investigational mda-7/IL-24 tumor suppressor agent, in patients with advanced solid tumors. The data (Abstract #380), which were presented today at the annual meeting of the American Society of Gene Therapy, showed that in this 22-patient trial, INGN 241 induced killing in all treated tumors, including in those patients who failed prior therapy with other anti-cancer agents. INGN 241 was well tolerated, and a maximum tolerated dose was not reached. Tumor growth control was observed in 44 percent of treated tumors. Two of five patients treated at the highest dose showed objective responses (greater than 50 percent reduction in tumor size). Increases in the number of immune cells known to mediate anti-tumor effects were also observed in all patients, consistent with the immune-stimulating activity of INGN 241.