TH-302

TH-302 is a 2-nitroimidazole triggered hypoxia-activated prodrug of the cytotoxin bromo-isophosphoramide mustard (Br-IPM). TH-302 inhibits H460 cells and HT29 cells with IC90 of 0.1 μM and 0.2 μM, respectively. TH-302 exhibits potent cytotoxicity to both human and murine MM cells with hypoxic selectivity and dose dependency, and induces G0/G1 cell-cycle arrest under hypoxic conditions. TH-302 treatment resulted in a reduction in the volume of the HF 48 hours after dosing and a corresponding increase in the necrotic fraction. TH-302 is currently in a phase II clinical trial for the treatment of soft tissue sarcoma.