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J Matern Fetal Neonatal Med. 2014 Mar;27(4):350-4. doi: 10.3109/14767058.2013.818125. Epub 2013 Aug 27.

Placental gene expression patterns of endoglin (CD105) in intrauterine growth restriction.

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  • 1Praxis für Gynäkologie und Geburtshilfe und allgemeine Medizin , Wehingen, Baden-Württemberg , Germany .



In this study, we describe placental gene expression patterns of endoglin in pregnancies with intrauterine growth restriction (IUGR) compared to normal pregnancies.


Placental samples were obtained from 101 pregnancies with IUGR using 140 normal pregnancy cases as control. Gene expression patterns and protein levels of the endoglin were compared between the two groups. For the gene expression analysis real-time PCR was applied, while for the estimation of placental protein level we performed Western analysis.


The placental endoglin gene was significantly overexpressed in the IUGR group versus the control group (Ln2(α): 1.69). The placental endoglin protein level proved to be significantly higher in case of IUGR (endoglin/β-actin ratio: 13.8 ± 2.3) versus the control cases (5.3 ± 1.1). The placental gene expression as well as the protein levels of endoglin showed no significant difference between female and male newborns. Concerning the placental gene expression and protein level, no significant difference was justified between the more (0-5 percentile) and less (5-10 percentile) severe cases of IUGR.


Increased placental gene expression of endoglin may result in vascular dysfunction leading to chronic fetal hypoxia, which may induce VEGF-A to stimulate angiogenesis. This can be explained as feed back response to restore fetal placental circulation.

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