PMID: 3384192Jul 1, 1988Paper

Diabetes affects sorbitol and myo-inositol levels of neuroectodermal tissue during embryogenesis in rat

Diabetes
I Sussman, F M Matschinsky

Abstract

ATP, ADP, phosphocreatine (PCr), creatine (Cr), glucose, malate, sorbitol, and myo-inositol (MI) were measured by quantitative histochemical techniques in pure neuroectodermal tissue of rat embryos of gestation days 11 and 12 that were dissected from normal and streptozocin-induced diabetic mothers. Neither gestational age nor maternal diabetes affected the tissue's energy potential (ATP-to-ADP and PCr-to-Cr ratios). Diabetes resulted in a fourfold rise in the embryonic glucose and a 25% increase in neuroectodermal malate content. Maternal hyperglycemia caused a rise in fetal sorbitol at days 11 and 12 of gestation. The MI content of the neuroectoderm was not affected by the maternal diabetic state in perfusion embryos (day 11); however, the near doubling of MI that occurs from day 11 to day 12 during normal development was prevented. Thus, embryos isolated from diabetic mothers on gestation day 12 had 30% less MI than embryos isolated from normal mothers. From these data we conclude that a rise in tissue sorbitol is not always accompanied by a fall in tissue MI. These results and recent information in the literature implicate involvement of decreased MI concentrations in the process leading to malformation of the nervous syste...Continue Reading

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