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Differential placental methylation in preeclampsia, preterm and term pregnancies.

Abstract：

INTRODUCTION:Preeclampsia (PE) is one of the leading causes of maternal mortality and morbidity worldwide. Recently, the role of epigenetic modifications in preeclampsia has been a focus of research. This study was to identified genes or pathways that may be associated with PE, and discuss whether the changes in the methylation level of these genes is related to the pathogenesis of PE. METHODS:The methylation levels of placental tissues between PE (n = 4), preterm birth (PB, n = 4) and term birth (TB, n = 4) were detected by Illumina Infinium HumanMethylation850 K BeadChip. Pyrosequencing and qRT-PCR were used to validated the methylation and expression levels of the genes with the most significant differences. RESULTS:The global methylation levels of placenta tissues in PE and PB were both higher compared to TB. After eliminated the effect of gestational age, there were 808 gene probes differentially methylated in PE compared to PB. We found 137 genes with 130 genes hypermethylated and 7 genes hypomethylated. CMIP, BLCAP and MICA genes were with the most significant differential methylation. The expression level of CMIP and BLCAP were both negatively correlated to the methylation levels, while the expression level of MICA was not related to its methylation levels. CONCLUSION:The methylation levels in placenta tissues were associated with gestational ages. We indicated the expression levels of the significantly methylated genes were negatively correlated with the methylation levels, further functional researches were still needed to find out whether they are associated with the onset of preeclampsia.

journal_name

Placenta

journal_title

Placenta

authors

Li Y,Cui S,Shi W,Yang B,Yuan Y,Yan S,Li Y,Xu Y,Zhang Z,Linlin Zhang

doi

10.1016/j.placenta.2020.02.009

subject

Has Abstract

pub_date

2020-04-01 00:00:00

pages

56-63

eissn

0143-4004

issn

1532-3102

pii

S0143-4004(20)30050-3

journal_volume

93

pub_type

杂志文章

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