[Effect of diseases in pregnancy on certain placental functions. Enzymatic systems degrading placental glycogen in pregnancy with gestosis].

Abstract

Pathways of human placental glycogen degradation either in normal or gestotic pregnancy were examined. Determinations of glycogen phosphorylase served as an index of glycogen cleavage in the phosphorylitic pathway. The activity of hydrolytic route was measured by estimating placental glucoamylase. Samples of placental tissue were obtained after delivery (between the 36th and the 40th week of pregnancy). In placentas derived from gestotic cases elevated activity of phosphorylase A, the decrease in phosphorylase B activity and the rise in glucoamylase were found. It suggests that gestosis may evoke certain impairment of placental glycogen metabolism deteriorating chiefly the glycogen degradation as it may be observed in hypoxic experiments.