Spontaneous Abortion and Failure of Human Cytotrophoblasts to adopt a vascular adhesion phenotype
DOI:
https://doi.org/10.32007/jfacmedbagdad.4841465Keywords:
Abortion.. cytotrophoblasts, PECAM-1, VCAM-1.Abstract
Background: Differentiating cytotrophoblasts transform their adhesion receptor phonotype so as to resemble the endothelial cells they replace a process that is required for normal placentation, and any defect in this adhesion phenotype switch might lead to pregnancy failure.
Patients and Methods: Curate samples of the materno-fetal interface were taken from 20 women with spontaneous first trimester abortion and 6 control women undergone elective termination of pregnancy in the first trimester. Immunohistochemistry analysis of paraffin embedded sections of these curate samples was performed using monoclonal antibodies for cytokeratin, PECAM-1 and VCAM-1.
Results: Cytokeratin showed positive immunostaing of the cytotrophoblasts lining the blood vessels, and PECAM-1 was positive in the cytotrophoblasts in only two cases who had elective
termination of their pregnancy, while VCAM-1 immunostaining of the cytotrophoblasts was positive in three cases that had elective termination of pregnancy and only
two cases that had spontaneous abortion.
Conclusion: Defective expression of endothelial cell adhesion molecules in human cytotrophoblasts might predispose to abnormal placentation, pregnancy failure and subsequent abortion.
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