alexa Vasoconstrictive effect of bile acids on isolated human placental chorionic veins.
Reproductive Medicine

Reproductive Medicine

Journal of Pregnancy and Child Health

Author(s): Seplveda WH, Gonzlez C, Cruz MA, Rudolph MI

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Abstract Intrahepatic cholestasis of pregnancy (ICP) is a rare complication of late pregnancy associated with a high rate of premature delivery, antepartum fetal death and fetal hypoxia. Since the principal biochemical feature of ICP is a marked elevation of maternal serum bile acid levels, a role of these substances in the pathophysiology of fetal complications has been suggested. In this study, the effect of bile acids on isolated human placental chorionic veins is described. High concentrations of bile acids, especially cholic acid, have a dose-dependent vasoconstrictive effect, which suggests that these substances could exert a detrimental effect on the fetus by increasing the resistance in chorionic veins through a vasospasm of the placental chorionic surface. An abrupt reduction of the oxygenated blood flow at the level of the placental chorionic plate may cause an acute impairment of the fetal perfusion and oxygenation, leading to fetal asphyxia. This is the first report that provides experimental evidence of the possible role of bile acids in those mechanisms that trigger fetal asphyxia in pregnancies complicated by ICP.
This article was published in Eur J Obstet Gynecol Reprod Biol and referenced in Journal of Pregnancy and Child Health

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