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  • Title: Uterine nitric oxide and prostaglandin E during embryonic implantation in non-insulin-dependent diabetic rats.
    Author: Novaro V, Jawerbaum A, Faletti A, Gimeno MA, González ET.
    Journal: Reprod Fertil Dev; 1998; 10(3):217-23. PubMed ID: 11596867.
    Abstract:
    In the process of embryo implantation in the rat, both nitric oxide and prostaglandins act as vascular and myometrial regulators. The aim of the present work was to evaluate the effect of diabetes on the synthesis of both agents during embryo implantation. In diabetic rats, uterine activity of the enzyme nitric oxide synthase and prostaglandin E production were increased during peri-implantation compared to the control group (P < 0.05 and P < 0.001, respectively). Both parameters showed a prolonged increase in temporal profile during peri-implantation days. Local production of nitric oxide and prostaglandin E in the implantation sites was higher in diabetic rats (P < 0.05), but the intersite:site ratio was similar to that of the control group. On the other hand, the implantation rate and the timing of the beginning of this process were not altered in the diabetic group. These results suggest that the vasoactive modulators of the implantation process, nitric oxide and prostaglandins, are increased in this diabetic pathology, and that this increase is probably functioning as a compensatory mechanism, so as to allow an unaltered rate of embryo implantation in this model.
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