Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA386986 | ENA |
REPOSITORIES: ENA
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Project description:Preeclampsia (PE) is a common pregnancy disorder, and it complicates 5~7% of all pregnancies. At present, termination of pregnancy is the only curative strategy for PE. To explore a potential target for PE treatment, we collected placental tissue samples from patients with preeclampsia (PE) and normal pregnant women (N), and performed high-throughput RNA sequencing. We found that FOXP2 was significantly downregulated in placental samples of patients with PE compared with the controls.
2024-11-06 | GSE279757 | GEO
Project description:Background: A small number of recent reports have suggested that altered placental DNA methylation may be associated with early onset preeclampsia. It is important that further studies be undertaken to confirm and develop these findings. We therefore undertook a systematic analysis of DNA methylation patterns in placental tissue from 24 women with preeclampsia and 24 with uncomplicated pregnancy outcome. Methods: We analyzed the DNA methylation status of approximately 27,000 CpG sites in placental tissues in a massively parallel fashion using an oligonucleotide microarray. Follow up analysis of DNA methylation at specific CpG loci was performed using the Epityper MassArray approach and high-throughput bisulfite sequencing. Results: Preeclampsia-specific DNA methylation changes were identified in placental tissue samples irrespective of gestational age of delivery. In addition, we identified a group of CpG sites within specific gene sequences that were only altered in early onset-preeclampsia (EOPET) although these DNA methylation changes did not correlate with altered mRNA transcription. We found evidence that fetal gender influences DNA methylation at autosomal loci but could find no clear association between DNA methylation and gestational age. Conclusion: Preeclampsia is associated with altered placental DNA methylation. Fetal gender should be carefully considered during the design of future studies in which placental DNA is analyzed at the level of DNA methylation. Further large-scale analyses of preeclampsia-associated DNA methylation are necessary. Bisulphite converted DNA from the 48 samples were hybridized to the Illumina Infinium 27k Human Methylation Beadchip v1.2
2014-07-12 | E-GEOD-59274 | biostudies-arrayexpress
Project description:The etiology of preeclampsia, a hypertensive disorder of human pregnancy, remains unknown. We addressed fetal sex selection and the suggestive role of fetal HLA-G and related genes, regulating maternal immune responses, in preeclampsia pathogenesis. We assessed birth sex ratios, weights, and seasonality of preeclampsia among 1.79 million births in Finland. We studied haplotypes of HLA-G 3’ untranslated region (UTR), regulating HLA-G expression, in 1000 Genomes series and in a preeclampsia cohort (n=1249). We quantified placental (n=163) mRNA expression of 136 genes, studied HLA-G and IFNα protein expression by immunohistochemistry, and measured maternal and fetal circulating IFNα levels by ELISA. Population-level data showed loss of male fetuses as a characteristic of preeclampsia. As a potential contributor to immune-mediated loss, we found balancing selection at HLA-G 3’UTR modulating sex ratio, and association of HLA-G 3’UTR haplotypes with placental HLA-G expression. HLA-G and its receptors were downregulated in preeclampsia placentas, and surprisingly, interferon alpha-1 (IFNA1) was highly upregulated. IFNA1 and HLA-G distinguished preeclampsia better than placental FLT1 expression. Fetal but not maternal circulating IFNα, produced by trophoblasts, showed association with maternal hypertension and fetal growth restriction. We uncover the link between placental HLA-G expression and human birth sex ratio. We propose that preeclampsia shares, through reduced HLA-G mediated immunotolerance, the mechanism needed to fight placental viral infections and malaria in evolution. IFNα upregulation in preeclampsia placenta, together with its known actions upstream of inflammatory genes, encourages testing IFNα inhibitors and especially the pregnancy-approved antimalarial hydroxichloroquine in treatment of preeclampsia.
2019-11-25 | GSE125460 | GEO
Project description:The placenta mediates adverse pregnancy outcomes, including preeclampsia, characterized by gestational hypertension and proteinuria. Placental cell type heterogeneity in preeclampsia is not well-understood and limits mechanistic interpretation of bulk gene expression measures. We generated single-cell RNA-sequencing samples for integration with existing data to create the largest deconvolution reference of 19 fetal and 8 maternal cell types from placental villous tissue at term. We deconvoluted eight published microarray case-control studies of preeclampsia. Our findings indicate substantial placental cellular heterogeneity in preeclampsia that predict previously observed bulk gene expression differences. Our deconvolution reference lays the groundwork for cellular heterogeneity-aware investigation into placental dysfunction and adverse birth outcomes.
2022-08-22 | GSE182381 | GEO
Project description:The tubal ectopic pregnancy (TEP) is a severe pregnancy complication accounted for 10-15% pregnancy-related deaths owing to the implantation and growth of embryos in fallopian tubes. Placental villi from TEP exhibit significant difference compared with that from intrauterine pregnancy (IP) in total volumes, trophoblast differentiation and intravillous vascularization. To investigate the difference in expression profiles of placental villi from IP and TEP, placental villi were collected from each phenotype, separated from maternal tissues and analyzed by high-throughput sequencing.
2022-12-10 | GSE210031 | GEO
Project description:Placental Fusobacterium nucleatum localization may be associated with pregnancy complications, including preeclampsia (PE), but nothing is known about its specific pathobiology. We aimed to perform transcriptomic analysis of the placentas of mice that were orally gavaged with Fusobacterium nucleatum or saline during pregnancy to further elucidate placental dysfunction in these conditions.
2024-09-26 | GSE268754 | GEO
Project description:Placental gene expression in severe preeclampsia.
| PRJNA107859 | ENA
Project description:Preeclampsia (PE) and Intrauterine Growth Restriction (IUGR) are major contributor of perinatal morbility and mortality, these pregnancy disorders associated with placental ischemia and share many similar pathophysiological features. The aim of this study was to compare the placental gene expression profiles including mRNA and lnRNAs from pregnant women from four study groups; PE, IUGR, PE-IUGR and normal pregnancy (NP). Gene expression microarray analysis was performed on placental tissue obtained at the moment of delivery and results were validated using RTq-PCR. Differential gene expression analysis revealed that the largest transcript variation was observed in the IUGR samples compared to NP (n=461; 314 mRNAs: 252 up-regulated and 62 down-regulated) and 133 lncRNAs: 36 up-regulated and 98 down-regulated). We also detected a group of differentially expressed transcripts shared between the PE and IUGR samples compared to NP (n=39), including 9 lncRNAs with a high correlation degree (P <0.05). Functional enrichment of these shared transcripts showed that cytokine signaling pathways, protein modification and regulation of JAK-STAT cascade are over-represented in both placental ischemic diseases. These findings contribute to the molecular characterization of placental ischemia showing common epigenetic regulation implicated in the pathophysiology of preeclampsia and Intrauterine Growth Restriction
2020-05-31 | GSE147776 | GEO
Project description:Preeclampsia is a common complication of pregnancy that affects 4-5% of pregnant women around the world. At present, there is a lack of early identification of high-risk patients of preeclampsia in clinical practice, which restricts the development of disease prevention and treatment. Previous studies have indicated that plasma exosomal miRNAs in pregnant women could serve as biomarkers of preeclampsia, but few is focused on exosomal miRNAs from preeclampsia pregnancy with severe features(sPE). Therefore, we detected and compared the plasma exosomal miRNA profiles between normal pregancy and sPE to explore potential biomarkers and pathogenic mechanisms of sPE.
2021-11-30 | GSE175807 | GEO
Project description:<p>Preeclampsia is a leading cause of morbidity and mortality in pregnant women, affecting 5-8% of gestations worldwide. Its development is influenced by maternal immune abnormalities, metabolic disorders and gut dysbiosis. In this study, we show that gut dysbiosis in pregnant C57BL/6J dams leads to increased fetal resorption, impaired placental development and altered vascularization. These adverse outcomes are associated with key pathological features of preeclampsia, including hypoxia, endoplasmic reticulum (ER) stress and reduction in uterine natural killer (NK) cell numbers. Furthermore, gut dysbiosis significantly perturbs placental carbohydrate metabolism, which impairs NK cell IFN-γ secretion. Notably, glucose supplementation restores placental NK cell function and reduces fetal resorption, suggesting that the observed impairment is reversible and dependent on a lower glycolytic rate. These findings highlight maternal gut microbiota as a key player in carbohydrate metabolism, with a pivotal role in modulating placental immunity and pregnancy outcome. The results provide valuable insights into potential metabolic biomarkers and suggest that targeting the gut microbiota may offer a strategy for preventing preeclampsia.</p>
2025-05-07 | MTBLS12316 | MetaboLights