Instil Bio, Inc. reported an oral presentation at the British Society for Gene and Cell Therapy Annual Conference, demonstrating that its proprietary CoStimulatory Antigen Receptor (CoStAR) platform enhances activity of TILs against autologous tumor. The presentation highlighted CoStAR’s unique mechanism of action which results in greatly enhanced activity of TILs when activation occurs through both the native TCR and engineered CoStAR receptors. Additionally, novel data demonstrated that Instil’s FRa-CoStAR enhances activity of TILs against autologous tumors with varied expression of FRa including ovarian, renal, and non-small cell lung cancer tumors.

The robust activity of NSCLC, ovarian, and renal carcinoma CoStAR-TILs against autologous tumor exceeded that of genetically unmodified melanoma TILs, as measured by secretion of IFN?.