Ezatiostat Glycine, L-g-glutaMyl-S-(phenylMethyl)-L-cysteinyl-2-phenyl-,1,3-diethyl ester, (2R)-;Ezatiostat;Terrapin 199;(2R)-L-gamma-Glutamyl-S-(phenylmethyl)-L-cysteinyl-2-phenylglycine 1,3-diethyl ester;Ezati 168682-53-9
Ezatiostat(TER199; TLK199) is a glutathione analog inhibitor of glutathione S-transferase (GST) P1-1.
IC50 value:
Target: GST P1-1
Ezatiostat hydrochloride (TLK199, Telintra) is the first glutathione S-transferase P1-1 (GST P1-1) inhibitor prodrug to demonstrate a clinically significant improvement in the cytopenias affecting patients with myelodysplastic syndrome (MDS), thereby validating this enzyme as a candidate target for pharmacologic intervention.
Structurally, ezatiostat is a tripeptide glutathione analog diethyl ester that is metabolized in vivo to the diacid, which is a potent and selective inhibitor of GST P1-1, an enzyme overexpressed in many human hematologic cancers. This inhibition induces a dissociation of GST P1-1 from its complex with c-jun N-terminal kinase (JNK)/c-Jun and activates signaling pathways that lead to cell proliferation and differentiation of normal hematopoietic cells and apoptosis of malignant cells.
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