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Biochem Biophys Res Commun. 2006 Jan 13;339(2):624-32. Epub 2005 Nov 18.

Oxidative stress provokes atherogenic changes in adipokine gene expression in 3T3-L1 adipocytes.

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First Department of Medicine, Hokkaido University School of Medicine, Sapporo 060-8638, Japan.


Increased oxidative stress has been associated with obesity-related disorders. In this study, we investigated how oxidative stress, in different ways of exposure, regulates gene expression of various adipokines in 3T3-L1 adipocytes. Exposure to 100-500microM H(2)O(2) for 10min, as well as exposure to 5-25mU/ml glucose oxidase for 18h, similarly decreased adiponectin, leptin, and resistin mRNAs, and increased plasminogen activator inhibitor-1 mRNA. Secretion levels of adipokines were also changed by oxidative stress in parallel with mRNA expression levels. Although a peak increase in plasminogen activator inhibitor-1 mRNA was achieved between 4 and 8h after exposure to H(2)O(2) for 10min, significant decreases in adiponectin and resistin mRNA were observed after 16h, while leptin mRNA was decreased earlier. Our results suggest that oxidative stress, even of short duration, has a significant impact on the regulation of various adipokine gene expressions favoring atherosclerosis.

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