Deficiencies of the mitochondrial respiratory chain or the phosphorylation system are becoming increasingly recognized causes of myopathy and multisystem disease in man. In biochemical terms, the ones most clearly defined have been associated with impaired activities of NADH : ubiquinone reductase (Morgan-Hughes el al., 1979, 1984; Land et al., 1981; Moreadith etal., 1984), ubiquino1:cytochrome...

We previously reported that mitochondrial function, intracellular ATP levels, and complex I activity are decreased in renal proximal tubular cells (RPTC) after oxidant (tert-butyl hydroperoxide; TBHP)-induced injury. This study examined the hypothesis that succinate supplementation decreases mitochondrial dysfunction, ameliorates energy deficits, and increases viability in TBHP-injured RPTC. Ba...

Pink1 is a mitochondrial kinase involved in Parkinson's disease, and loss of Pink1 function affects mitochondrial morphology via a pathway involving Parkin and components of the mitochondrial remodeling machinery. Pink1 loss also affects the enzymatic activity of isolated Complex I of the electron transport chain (ETC); however, the primary defect in pink1 mutants is unclear. We tested the hypo...