(1s,3r)-rsl3

RSL3 (RSL3 1S) is an inhibitor of GPX4, and inhibits system xc- that blocks GSH synthesis (IC50=100 nM). RSL3 is a VDAC-independent activator of ferroptosis that is selective for tumor cells carrying oncogenic RAS.

iFSP1, a potent, selective, and glutathione-independent ferroptosis suppressor protein 1 (FSP1) (AIFM2) inhibitor with an EC50 of 103 nM, sensitizes diverse human cancer cell lines to ferroptosis inducers like (1S,3R)-RSL3. It uniquely triggers ferroptosis in GPX4-knockout cells overexpressing FSP1.

GPX4 24, a derivative of (1S,3R)-RSL3, acts as a potent inhibitor of glutathione peroxidase 4 (GPX4) through covalent binding in a concentration-dependent manner within 4T1 murine mammary carcinoma cells. This compound effectively induces ferroptosis in GPX4-dependent HT-1080 fibrosarcoma cells with an EC50 value of 0.16 µM. Additionally, at a dose of 200 mg/kg, GPX4 24 elevates malondialdehyde (MDA) levels in both kidney and plasma of mice, highlighting its impact on lipid peroxidation.