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ABSTRACT: Microbiome of the different body sites in preeclampsia patients

PROVIDER: PRJNA516528 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8475360_1.fastq.gz	Fastqsanger.gz
	SRR8475360_2.fastq.gz	Fastqsanger.gz
	SRR8475370_1.fastq.gz	Fastqsanger.gz
	SRR8475370_2.fastq.gz	Fastqsanger.gz
	SRR8475361_1.fastq.gz	Fastqsanger.gz

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Project description:For understanding the relationship of preeclampsia and placental methylation,we performed an epigenome-wide association study in a Chinese cohort containing 22 early-onset preeclampsia patients and 20 normal controls. We used Illumina Infinium HumanMethylation450k BeadChip for detecting the methylation level, and used placental genomic DNA as sample. most of the significant CpG sites were hypomethylated in EOPE in the Chinese cohort.

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Genome-Wide Mapping of 5-mC and 5-hmC in severely Preeclamptic Placentas.

Project description:Preeclampsia (PE) is a major contributor of maternal mortality with uncertain etiology. Recent studies suggested that epigenetic modifications, including DNA methylation, play a vital role in the development of PE. In this study, we have mapped genome-wide distribution of 5-methylcytosin (5-mC) and 5-hydroxymethylcytosine (5-hmC) using MeDIP and (h)MeDIP in the placentas from severely preeclamptic patients and normal controls. A total 194485 pooled 5-mC peaks and 138133 pooled 5-hmC peaks were identified, of which 714 5-mC peaks and 119 5-hmC peaks showed significant difference between patients and controls (>2-fold, p<0.05).To our knowledge, this is the first report of DHMRs (Differentially Hydroxy-Methylated Regions) in preeclamptic placenta. We not only confirmed the aberrant DNA methylated regions in the process of preeclampsia reported previously, but also identified unreported regions. A total of 4 selected DMRs (Differentially Methylated Regions) were also confirmed by MassARRAY EppiTYPER. Of these, PTPRN2, which had low level of 5-mC and high level of 5-hmC at gene body, was further verified to have lower methylation level at promoter regions in case group compared with controls. In conclusion, our study provided genome-wide distribution of 5-mC and 5-hmC in severe PE and normal controls, which have further clinical value for the identification of diagnostic and therapeutic markers for severe PE. Examination of 5-mC and 5-hmC pattern in 4 control cases' tissue and 4 severely Preeclamptic Placentas cases' tissue.

2014-12-13 | E-GEOD-63743 | biostudies-arrayexpress

Transcription profiling of human adipose tissue, decidua and placenta from patients with preeclampsia vs. unaffected indviduals reveals dysregulation of the circulating and tissue-based renin-angiotensin system in preeclampsia

Project description:Preeclampsia complicates more than 3% of all pregnancies in the United States and Europe. High-risk populations include women with diabetes, dyslipidemia, thrombotic disorders, hyperhomocysteinemia, hypertension, renal diseases, previous preeclampsia, twin pregnancies, and low socioeconomic status. In the latter case, the incidence may increase to 20% to 25%. Preeclampsia is a major cause of maternal and fetal morbidity and mortality. Preeclampsia is defined by systolic blood pressure of more than 140 mm Hg and diastolic blood pressure of more than 90 mm Hg after 20 weeks gestation in a previously normotensive patient, and new-onset proteinuria. Abnormal placentation associated with shallow trophoblast invasion (fetal cells from outer cell layer of the blastocyst) into endometrium (decidua) and improper spiral artery remodeling in the decidua are initial pathological steps. In this study we analyzed the renin-angiotensin system in adipose tissue, decidua and placenta from women with uneventful pregnancy and women with preeclampsia. We also analyzed the tissue by Affymetrix chips in a comparison study (control vs. preeclampsia) Experiment Overall Design: 6 affymetrix human expression chips (GPL570) were analyzed. Experiment Overall Design: They represent 3 tissues (pooled from 10 individuals each) from patients with preeclampsia and from patients with uneventful pregnancy (collected by cesaraen section). Tissues from patients with uneventful pregnancy are the controls in comparison to tissues of patients with preeclampsia.

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