Effect of glucose on Na, K-ATPase activity in cultured bovine aortic endothelial cells

T. Yamashita, F. Umeda, T. Hashimoto, T. Inoguchi, T. Yamauchi, K. Mimura, J. Watanabe, H. Nawata

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    2 Citations (Scopus)

    Abstract

    The effect of high concentrations of glucose on Na, K-ATPase activity and the polyol pathway was studied using cultured bovine aortic endothelial cells. Na, K-ATPase activity was expressed as ouabain-sensitive K+ uptake. A significant decrease in Na, K-ATPase activity with an intracellular accumulation of sorbitol was found in confluent endothelial cells incubated with 400 mg/dl glucose for 96 h. However, there was no significant change in the Na, K-ATPase activity or sorbitol content of the cells incubated with 100 mg/dl glucose plus 300 mg/dl mannitol. The decrease in Na, K-ATPase induced by the high glucose concentration was restored by the simultaneous addition of 10-4M ponalrestat (ICI 128,436; Statil), an aldose reductase inhibitor. The addition of this agent also significantly reduced the increase in sorbitol induced by high glucose levels. These results suggest that the decrease in Na, K-ATPase activity induced in cultured aortic endothelial cells by high concentrations of glucose may be caused in part by the accumulation of sorbitol.

    Original languageEnglish
    Pages (from-to)1-7
    Number of pages7
    JournalEndocrinologia Japonica
    Volume39
    Issue number1
    DOIs
    Publication statusPublished - 1992

    All Science Journal Classification (ASJC) codes

    • Endocrinology
    • Engineering(all)

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