L-Buthionine-(S,R)-Sulfoximine

L-Buthionine-(S,R)-sulfoximine is an irreversible inhibitor of ?-glutamylcysteine synthetase (Ki = 25 µM).{22906} It inhibits the proliferation of ZAZ and M14 melanoma cells, as well as A2780 ovarian and MCF-7 breast cancer cells (IC50s = 4.9, 18, 8.5, and 26.5 µM, respectively).{66227} L-Buthionine-(S,R)-sulfoximine (100µM) induces ferroptosis in A172 and T98G glioblastoma cells.{66226} It increases reactive oxygen species (ROS) levels in HeLa cells when used at a concentration of 10 µM. L-Buthionine-(S,R)-sulfoximine (1 mM), in combination with methylglyoxal, induces apoptosis of bovine aortic endothelial cells (BAECs).{22908} It increases the number of eye spots in the retinal pigment epithelium, an indicator of DNA deletions, in mouse pups when administered to pregnant dams at concentrations of 2 and 20 mM in the drinking water.{22905} L-Buthionine-(S,R)-sulfoximine decreases cysteine and glutathione (GSH) levels in fetal mice when administered to pregnant dams.