Influence of the placenta on fetal plasma insulin and neonatal hepatic enzyme induction in the rat.
1989
: In order to study the placental role in controlling glucose metabolism and neonatal induction of tyrosine aminotransferase in rat liver, a comparison was made between the artificially delivered-rat feto-placental unit and the newborn littermates. The immunoreactive serum insulin in the feto-placental unit remains as high as in utero for at least 1 h whereas in the newborn rat it decreases rapidly after delivery. From Caesarian section to 6 h later, in contrast to the newborn littermates, the feto-placental unit remains hyperglycaemic. Upon glucagon injection the feto-placental unit shows a delay in the increase of the hepatic tyrosine aminotransferase activity in comparison with the newborn rat.
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