(+)-Etomoxir (sodium salt)

(+)-Etomoxir is an irreversible inhibitor of carnitine palmitoyltransferase 1 (CPT1), an enzyme that combines fatty acyl-CoAs with carnitine for transport into the mitochondria for B-oxidation.{26273,26271} It inhibits fatty acid oxidation in hepatocytes in vitro (IC50s = 0.1, 1, and 10 µM for human, guinea pig, and rat hepatocytes, respectively), and it shifts the carbon source for the TCA cycle to glucose.{46094,46095} It also inhibits cholesterol synthesis from acetate in hepatocytes upstream of mevalonate.{46096} (+)-Etomoxir also decreases ATP-linked and uncoupled oxygen consumption in C2C12 myotubes when used in combination with BPTES (Item No. 19284) or UK 5099 (Item No. 16980).{47146}