9 July 2024 - Obsidian Therapeutics today announced that the US FDA has granted fast track designation to OBX-115, a novel engineered tumour-derived autologous T cell immunotherapy armoured with pharmacologically regulatable membrane-bound IL15, for the treatment of patients with metastatic or locally advanced melanoma that is refractory to or has relapsed after PD-1/PD-L1–based immune checkpoint inhibitors.