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Arch Biochem Biophys. 2008 Jun 1;474(1):119-27. doi: 10.1016/j.abb.2008.03.008. Epub 2008 Mar 14.

Hepatic mitochondrial transport of glutathione: studies in isolated rat liver mitochondria and H4IIE rat hepatoma cells.

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  • 1Department of Pharmacology, Wayne State University School of Medicine, 540 East Canfield Avenue, Detroit, MI 48201-1928, USA.

Abstract

Glutathione (GSH) is transported into renal mitochondria by the dicarboxylate (DIC; Slc25a10) and 2-oxoglutarate carriers (OGC; Slc25a11). To determine whether these carriers function similarly in liver mitochondria, we assessed the effect of competition with specific substrates or inhibitors on GSH uptake in isolated rat liver mitochondria. GSH uptake was uniphasic, independent of ATP hydrolysis, and exhibited K(m) and V(max) values of 4.08 mM and 3.06 nmol/min per mg protein, respectively. Incubation with butylmalonate and phenylsuccinate inhibited GSH uptake by 45-50%, although the individual inhibitors had no effect, suggesting in rat liver mitochondria, the DIC and OGC are only partially responsible for GSH uptake. H4IIE cells, a rat hepatoma cell line, were stably transfected with the cDNA for the OGC, and exhibited increased uptake of GSH and 2-oxoglutarate and were protected from cytotoxicity induced by H(2)O(2), methyl vinyl ketone, or cisplatin, demonstrating the protective function of increased mitochondrial GSH transport in the liver.

PMID:
18374655
[PubMed - indexed for MEDLINE]
PMCID:
PMC3840356
Free PMC Article

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