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- W2333437834 abstract "A series of interrelated biochemical and functional defects, induced by hyperglycemia, associated with intracellular depletion of D-myo-inositol, and corrected by aldose reductase inhibitors, have been ascribed to abnormal phosphoinositide metabolism in several tissues prone to diabetic complications. However, reductions in tissue D-myo-inositol content are not universally found in complications-prone diabetic tissues, and direct mass-action effects of cellular D-myo-inositol depletion on the critical CDPdiacylglycerol-inositol 3-phosphatidyltransferase (PI synthase; EC 2.7.8.11) step have never been shown conclusively in relevant cells. The studies reported here simultaneously estimated the chemical mass of CDP diglyceride by equilibrium labeling with 5-[3H]cytidine and phosphoinositide biosynthesis by the incorporation of [32P]orthophosphate into phosphoinositide. This was done to assess the degree of inhibition of PI synthase under various degrees of D-myo-inositol depletion and sorbitol accumulation induced by glucose and other metabolic manipulations in cultured human retinal pigment epithelial cells, a new in vitro model for diabetic complications. The results suggest that sorbitol accumulation limits the PI synthase reaction in these cells by selectively depleting specific intracellular pools of D-myo-inositol and/or by possible independent effects of sorbitol on PI synthase." @default.
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- W2333437834 date "1992-04-01" @default.
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- W2333437834 title "Inhibition of phosphatidylinositol synthase by glucose in human retinal pigment epithelial cells" @default.
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- W2333437834 doi "https://doi.org/10.1152/ajpendo.1992.262.4.e417" @default.
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