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  Environmental toxicology

  Digital Access Wiley v. 14-, 1999-
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• Article

  Glycogen metabolism in the placenta of streptozotocin diabetic rats.

  Abramovici A, Sporn J, Prager R, Shaltiel A, Laron Z, Liban E.

  Horm Metab Res. 1978 May;10(3):195-9.

  Administration of STZ prior to mating, induced significant impairment in glycogen metabolism in term rat placentae. Glycogen retention was observed in the treated placentae, while glycogen synthetase activity was reduced. The glycogenolytic pathway seemed to proceed mainly through amyloglucosidase enzyme whose activity increased threefold. Glucose-6-phosphatase showed a moderate activation, mainly in the labyrinth zone, while phosphorylase was slightly inhibited. These changes were accompanied by a decrease in placental insulin levels. The possible defensive role played by the placenta in cases of maternal hyperglycemia was postulated.

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