L-Buthionine sulfoximine is a specific Î³-glutamylcysteine synthetase inhibitor that blocks the rate-limiting step of glutathionine biosynthesis and in doing so depletes the intracellular glutathionine pool in both cultured cells and in whole animals. Glutathionine (GSH) is a water-soluble tripeptide composed of glutamine, cysteine, and glycine. Reduced glutathione is the most abundant intracellular small molecule thiol present in mammalian cells and it serves as a potent intracellular antioxidant protecting cells from toxins such free radicals. Changes in glutathionine homeostasis have been implicated in the etiology and progression of a
A large new epidemiological study appears to provide further evidence that regular intake of fiber from fruits, vegetables and whole grains is associated with a reduced risk of developing breast cancer in women.
Withaferin A (WA) is derived from the medical plant Withania somnifera (commonly known as ashwagandha or Indian winter cherry), which has been safely used for centuries in Indian Ayurvedic medicine for treatment of different ailments. Suppresion of angiogenisis, alteration of cytoskeletal architecture, and inhibition of proteasomal activity by WA has also been documented.