Vitamin E decreases the occurrence of malformations in the offspring of diabetic rats

Diabetes
C M Simán, U J Eriksson

Abstract

An association between excess oxygen radical activity and disturbed embryogenesis in diabetic pregnancy has been suggested. In the present study, the protective capacity of vitamin E with different treatment regimens was investigated in early and late pregnancy of streptozotocin-induced diabetic rats. Daily gavaging of 0.2 g/kg or 0.8 g/kg of vitamin E exerted moderate protective effects. In contrast, treatment with a diet enriched with 2% (wt/wt) of vitamin E, yielding an approximate daily dosage of 2 g/kg of vitamin E, clearly restored both embryonic and fetal morphology. High-performance liquid chromatography measurement showed that maternal diabetes decreased embryonic content of vitamin E. When pregnant diabetic animals were supplemented with vitamin E, increased concentrations of the vitamin were found in maternal, embryonic, and fetal tissues. Thus, despite marked accumulation of vitamin E in maternal tissues, the compound apparently reached the conceptus. Thiobarbituric acid reactive substances (TBARS) were estimated as a measure of lipid peroxidation, and no changes were observed in maternal tissue, embryonic tissue, placenta, and fetal brain in the untreated diabetic group. In contrast, a fivefold increase of TBARS wa...Continue Reading

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