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Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Synthesis and Antineoplastic Evaluation of Mitochondrial Complex II (Succinate Dehydrogenase) Inhibitors Derived from Atpenin A5.
ChemMedChem 2017 July 7
Mitochondrial complex II (CII) is an emerging target for numerous human diseases. Sixteen analogues of the CII inhibitor natural product atpenin A5 were prepared to evaluate the structure-activity relationship of the C5 pyridine side chain. The side chain ketone moiety was determined to be pharmacophoric, engendering a bioactive conformation. One analogue, 1-(2,4-dihydroxy-5,6-dimethoxypyridin-3-yl)hexan-1-one (16 c), was found to have a CII IC50 value of 64 nm, to retain selectivity for CII over mitochondrial complex I (>156-fold), and to possess a ligand-lipophilicity efficiency (LLE) of 5.62, desirable metrics for a lead compound. This derivative and other highly potent CII inhibitors show potent and selective anti-proliferative activity in multiple human prostate cancer cell lines under both normoxia and hypoxia, acting to inhibit mitochondrial electron transport.
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