L-threo-PPMP is an inhibitor of GlcT, which is the UDP-Glc: Ceramide β1,1glucosyltransferase enzyme. It effectively inhibits glycosphingolipid biosynthesis, while also inducing apoptosis. These properties of L-threo-PPMP contribute to its notable anti-cancer activity.
D-threo-PPMP is a glucosylceramide (GlyCer) synthetase inhibitor.1,2It is the active enanantiomer and enzymatic inhibitory component of the racemic DL-threo-PPMP . In MDCK kidney epithelial cells, D-threo-PPMP induces a 70% reduction in cell growthin vitroat 20 μM and significantly inhibits DNA synthesis at 3 μM.3[Matreya, LLC. Catalog No. 1865] 1.Shen, W., Henry, A.G., Paumier, K.L., et al.Inhibition of glucosylceramide synthase stimulates autophagy flux in neuronsJ. Neurochem.129(5)884-894(2014) 2.Lee, L., Abe, A., and Shayman, J.A.Improved inhibitors of glucosylceramide synthaseJ. Biol. Chem.274(21)14662-14669(1999) 3.Abe, A., Inokuchi, J.-i., Jimbo, M., et al.Improved inhibitors of glucosylceramide synthaseJ. Biochem.111(2)191-196(1992)