Normalizing mitochondrial superoxide production blocks three pathways of hyperglycaemic damage

Takeshi Nishikawa, Diane Edelstein, Xue Liang Du, Sho Ichi Yamagishi, Takeshi Matsumura, Yasufumi Kaneda, Mark A. Yorek, David Beebe, Peter J. Oates, Hans Peter Hammes, Ida Glardino, Michael Brownlee

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Abstract

Diabetic hyperglycaemia causes a variety of pathological changes in small vessels, arteries and peripheral nerves. Vascular endothelial cells are an important target of hyperglycaemic damage, but the mechanisms underlying this damage are not fully understood. Three seemingly independent biochemical pathways are involved in the pathogenesis: glucose-induced activation of protein kinase C isoforms; increased formation of glucose-derived advanced glycation end-products; and increased glucose flux through the aldose reductase pathway. The relevance of each of these pathways is supported by animal studies in which pathway-specific inhibitors prevent various hyperglycaemia-induced abnormalities. Hyperglycaemia increases the production of reactive oxygen species inside cultured bovine aortic endothelial cells. Here we show that this increase in reactive oxygen species is prevented by an inhibitor of electron transport chain complex II, by an uncoupler of oxidative phosphorylation, by uncoupling protein-1 and by manganese superoxide dismutase. Normalizing levels of mitochondrial reactive oxygen species with each of these agents prevents glucose-induced activation of protein kinase C, formation of advanced glycation end-products, sorbitol accumulation and NFκB activation.

Original languageEnglish (US)
Pages (from-to)787-790
Number of pages4
JournalNature
Volume404
Issue number6779
DOIs
StatePublished - Apr 13 2000

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Nishikawa, T., Edelstein, D., Du, X. L., Yamagishi, S. I., Matsumura, T., Kaneda, Y., Yorek, M. A., Beebe, D., Oates, P. J., Hammes, H. P., Glardino, I., & Brownlee, M. (2000). Normalizing mitochondrial superoxide production blocks three pathways of hyperglycaemic damage. Nature, 404(6779), 787-790. https://doi.org/10.1038/35008121