Fetal Growth Retardation is Associated with High Apoptotic Cells and Low VEGF Expression in Placenta of Malarial Pregnant Mice.

Abstract

During pregnancy, pregnant women are susceptible to malaria, contributing significantly to maternal and infant mortality. This research was conducted to study the effect of Plasmodium berghei infection in pregnant mice on fetal growth retardation through placental cell apoptosis and the change of local vascularization. Eighteen pregnant Balb/c strain mice resulting from simultanously mating were divided into two groups those were nine pregnant mice used as non infected group and nine pregnant mice infected with Plasmodium berghei on day 9th post mating used as infected group respectively. On day 15th of post mating, all of the pregnant mice were killed. Fetal weights were measured using analytic balance. Apoptosis of placental cells and VEGF expression in the placental tissue were measured using immunohistochemistry. Result showed that there was sequestration of parasite-infected red blood cells (PRBCs) in intervillous space. Statistical analysis showed that the fetal weights in infected pregnant mice group was significantly lower than non infected one (p = 0.01), and the placental cell apoptosis in placental tissue of infected pregnant mice was significantly higher than the non infected one (p=0.00).There was also a significant difference on VEGF expression between infected group and non infected group (p= 0,00). Plasmodium berghei infection in pregnant Balb/c mice can cause fetal growth retardation due to high of placental cell apoptosis and low VEGF expression.