NMPRTase inhibitor APO866

Definition / meaning of NMPRTase inhibitor APO866

A small molecule with potential antineoplastic and antiangiogenic activities. NMPRTase inhibitor APO866 binds to and inhibits nicotinamide phosphoribosyltransferase (NMPRTase), inhibiting the biosynthesis of nicotinamide adenine dinucleotide (NAD+) from niacinamide (vitamin B3), which may deplete energy reserves in metabolically active tumor cells and induce tumor cell apoptosis. In addition, this agent may inhibit tumor cell prioduction of vascular endothelial growth factor (VEGF), resulting in the inhibition of tumor angiogenesis. The coenzyme NAD+ plays an essential role in cellular redox reactions, including the redox reaction linking the citric acid cycle and oxidative phosphorylation.

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The Web site of the National Cancer Institute (http://www.cancer.gov/)

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