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Metabolism of oxidized linoleic acid by glutathione transferases: peroxidase activity toward 13-hydroperoxyoctadecadienoic acid.
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2006 (English)In: Biochim Biophys Acta, ISSN 0006-3002, Vol. 1760, no 7, 1064-70 p.Article in journal (Refereed) Published
Abstract [en]

The oxidation of linoleic acid produces several products with biological activity including the hydroperoxy fatty acid 13-hydroperoxyoctadecadienoic acid (13-HPODE), the hydroxy fatty acid 13-hydroxyoctadecadienoic acid (13-HODE), and the 2,4-dienone 13-oxooctadecadienoic acid (13-OXO). In the present work, the peroxidase activity of glutathione transferases (GST) A1-1, M1-1, M2-2, and P1-1(Val 105) toward 13-HPODE has been examined. The alpha class enzyme is the most efficient peroxidase while the two enzymes from the mu class exhibit weak peroxidase activity toward 13-HPODE. It was also determined that the conjugated diene 13-HODE is not a substrate for GST from the alpha and mu classes but that 13-HODE does inhibit the GST-catalyzed conjugation of CDNB by enzymes from the alpha, mu, and pi classes. Finally, both 13-HODE and 13-OXO were shown to be inducers of GST activity in HT-29 and HCT-116 colon tumor cells. These data help to clarify the role of GST in the metabolic disposition of linoleic acid oxidation products.

Place, publisher, year, edition, pages
2006. Vol. 1760, no 7, 1064-70 p.
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URN: urn:nbn:se:uu:diva-81517PubMedID: 16624487OAI: oai:DiVA.org:uu-81517DiVA: diva2:109432
Available from: 2006-08-24 Created: 2006-08-24 Last updated: 2011-01-11

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Mannervik, Bengt

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