FEBS Lett. 1994 Sep 19;352(1):84-6.

Identification of metabolic pathways of the lipid peroxidation product 4-hydroxynonenal by mitochondria isolated from rat kidney cortex.

Ullrich O, Grune T, Henke W, Esterbauer H, Siems WG.

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Clinic of Physical Therapy, Medical Faculty (Charite), Humboldt-University, Berlin, Germany.

Abstract

The cytosolic lipid peroxidation product 4-hydroxynonenal (HNE) is rapidly metabolized in mitochondria isolated from rat kidney cortex. About 80% of HNE was degraded within 3 min of incubation. Main products of HNE which were identified in mitochondria were the hydroxynonenoic acid, the 1,4-dihydroxynonene and the glutathione-HNE-conjugate. Furthermore, formation of metabolites of the tricarboxylic acid cycle from HNE is suggested. The quantitative share of HNE binding to proteins was high with about 8% of total HNE consumption after 3 min of incubation. Therefore, rapid degradation of HNE by mitochondria might be involved in an intracellular antioxidative defense system.

PMID:: 7925950; [PubMed - indexed for MEDLINE]

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