Abstract
Lowering of low-density lipoprotein cholesterol is well achieved by 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase inhibitors (statins). Statins inhibit the conversion of HMG-CoA to mevalonate, a precursor for cholesterol and coenzyme Q10 (CoQ 10). In HepG2 cells, simvastatin decreased mitochondrial CoQ 10 levels, and at higher concentrations was associated with a moderately higher degree of cell death, increased DNA oxidative damage and a reduction in ATP synthesis. Supplementation of CoQ 10, reduced cell death and DNA oxidative stress, and increased ATP synthesis. It is suggested that CoQ 10 deficiency plays an important role in statin-induced hepatopathy, and that CoQ 10 supplementation protects HepG2 cells from this complication.
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