Pregnancy Related Clinical Trial
Official title:
A Retrospective Study Using Mass Spectrometry to Characterize Post-translational Modifications to Circulating Histones in Pregnant Women Developing Pre-eclampsia
This is a descriptive pilot study on a ready-constituted biobank (outside the Jardé Law). It is an ancillary study to the "GrossPath" cohort (RCB ID number: 2014-A01120-47). Pregnancy generates an increased risk of thrombosis, and placenta-mediated diseases constitute a risk factor for cardiovascular pathologies responsible for significant maternal-fetal morbidity and mortality. Understanding and exploring the cellular and molecular mechanisms of dysfunctions of the vascular-placental interface could provide arguments to understand the systemic vascular risk, characterize it and finally detect it on the basis of new markers, thus opening the way for targeted preventive management to reinforce the general principles of precision medicine. Netosis is a process of activation of neutrophils, which then generate filaments containing DNA, enzymes and extracellular histones. Netosis occurs in pregnancy and is increased in vascular-placental complications. It can be studied by measuring circulating histones, particularly the citrullinated histone H3. Levels of this modified histone H3, as well as those of two other modifications, have recently been shown to increase during pregnancy. These levels have also been shown to be even greater in pregnancy complications. The aim of this study is to complete this mapping in order to obtain a precise signature for all post-translational histone modifications in normal pregnancies and pregnancies complicated by pre-eclampsia from the "GrossPath" cohort in order to propose new circulating biomarkers for placental vascular pathologies. The post-translational histone modification profiles (mapping) of pregnant women with normal pregnancies will be compared with those developing pre-eclampsia.
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