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Epigenome analysis of newborn placenta and cord blood samples

ABSTRACT: DNA methylation profiling of placenta and cord blood samples. The Illumina GoldenGate methylation assay was used to obtain DNA methylation profiles across approximately 1,536 CpGs in 23 placenta and 23 cord blood samples.

ORGANISM(S): Homo sapiens

PROVIDER: GSE36852 | GEO | 2012/03/29

SECONDARY ACCESSION(S): PRJNA157197

REPOSITORIES: GEO

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Epigenome analysis of newborn placenta and cord blood samples

Project description:DNA methylation profiling of placenta and cord blood samples. The Illumina GoldenGate methylation assay was used to obtain DNA methylation profiles across approximately 1,536 CpGs in 23 placenta and 23 cord blood samples. Bisulphite converted DNA from the 46 samples were hybridised to the Illumina GoldenGate Methylation assay

2012-03-28 | E-GEOD-36852 | biostudies-arrayexpress

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Exposure to Gestational Diabetes Mellitus In Utero Alters DNA Methylation in Placenta and Fetal Cord Blood [Placenta]

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Project description:Objective: To explore the characteristics and underlying molecular mechanisms of genome-scale expression profiles of women with- or without- gestational diabetes mellitus and their offspring. Materials and Methods: We recruited a group of 21 pregnant women with gestational diabetes mellitus (GDM) and 20 healthy pregnant women as controls. For each pregnant women, RRBS were performed using the placenta and paired neonatal umbilical cord blood specimens. Differentially methylated regions (DMRs) were identified. Then, functional enrichment analysis was performed to differential methylated genes (DMGs) separately or interactively in placenta and umbilical cord blood. Results: Through the comparison of GDM and healthy samples, 2779 and 141 DMRs were identified from placenta and umbilical cord blood, respectively. Functional enrichment analysis showed that the placenta methylation and expression profiles of GDM women mirrored the molecular characteristics of “type II diabetes” and “insulin resistance”. Methylation-altered genes in umbilical cord blood were associated with pathways “type II diabetes” and “cholesterol metabolism”. DMGs illustrated significant overlaps among placenta and umbilical cord blood samples, and the overlapping DMGs were associated with cholesterol metabolism. Conclusions: Our research demonstrated the epigenomic alternations of GDM mothers and offspring. Our findings emphasized the importance of epigenetic modifications in the communication between pregnant women with GDM and offspring, and provided reference for the prevention, control, treatment, and intervention of perinatal deleterious events of GDM and neonatal complications.

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