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

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

PROVIDER: PRJNA641799 | ENA |

REPOSITORIES: ENA

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

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

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

Project description:Exposure to Gestational Diabetes Mellitus In Utero Alters DNA Methylation in Placenta and Fetal Cord Blood

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

Project description:Genome wide DNA Methylation in fetal cord blood and placenta from mother with GDM compared to mother with normal glucose tolerance

2021-01-31 | GSE153220 | GEO

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

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Reduced representation bisulfite sequencing (RRBS) methylation profiles of placenta and umbilical cord blood with or without gestational diabetes mellitus (GDM)

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.

2022-05-31 | GSE203169 | GEO

Gestational diabetes mellitus alters placental structure, efficiency, and plasticity

Project description:The hemochorial placenta provides a critical barrier at the maternal-fetal interface to modulate maternal immune tolerance and enable gas and nutrient exchange between mother and conceptus. Pregnancy outcomes are adversely affected by gestational diabetes mellitus (GDM); however, the effects of GDM on placental formation, and subsequently fetal development, are not fully understood. In this report, streptozotocin was used to induce hyperglycemia in pregnant rats for the purpose of investigating the impact of GDM on placental formation and fetal development. GDM caused placentomegaly and placenta malformation, decreasing placental efficiency and fetal size. Elevated glucose disrupted rat trophoblast stem (TS) cell differentiation in vitro. Evidence of altered trophoblast differentiation was also observed in vivo, as hyperglycemia affected the junctional zone transcriptome and interfered with intrauterine trophoblast invasion and uterine spiral artery remodeling. When exposed to hypoxia, rats with GDM showed decreased proliferation and ectoplacental cone development on gestation day (gd) 9.5 and complete pregnancy loss by gd 13.5. Furthermore, elevated glucose concentrations inhibited TS cell responses to hypoxia in vitro. Overall, these results indicate that alterations in placental development, efficiency, and plasticity could contribute to the suboptimal fetal outcomes in offspring from pregnancies complicated by GDM.

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Genome wide methylation of cord blood from gestational diabetes mellitus

Project description:Genome wide DNA methylation profiling of cord blood cells obtained from gestational diabetes mellitus (GDM) pregnancies. The Illumina EPIC methylation beadchip array was used to obtain DNA methylation profiles across approximately 850,000 CpG dinucleotide methylation loci in DNA isolated from cord blood. Samples include 165 GDM subjects.

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Expression profiles of placenta and umbilical cord blood with or without gestational diabetes mellitus (GDM)

Project description:Expression profiles of placenta and umbilical cord blood with or without gestational diabetes mellitus (GDM)

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

Project description:This SuperSeries is composed of the SubSeries listed below.

2021-01-31 | GSE153221 | GEO

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