Acb1f155-10f3-4dd3-8c23-2827e021877f - samples
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ABSTRACT:
PROVIDER: EGAD00001008273 | EGA |
REPOSITORIES: EGA
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Project description:Pre-eclampsia (PE) is a syndrome that affects multiple organ systems and is the most severe hypertensive disorder in pregnancy. It frequently leads to preterm delivery, maternal and fetal morbidity and mortality, and life-long complications. We currently lack efficient screening tools and early therapies to address PE. To study the initial stages of early onset PE and identify candidate markers and pathways, we performed spatio-temporal multi-omics profiling of human PE placentae and healthy controls and validated targets in early gestation in a longitudinal clinical cohort. We used a single nuclei RNA-seq approach combined with spatial proteo- and transcriptomics and mechanistic in vitro signaling analyses. We discovered a key disruption in trophoblast transition, which is driven by the increase of transcriptional coactivator p300 that ultimately ends with a senescence-associated secretory phenotype (SASP) of trophoblasts. We found a significant increase in the senescence marker Activin-A in preeclamptic maternal serum in early gestation, before the development of clinical symptoms, indicating a translation of the fetal syndrome to the maternal side. Our work identifies potential new biomarkers for the early diagnosis of the disease and possible targets for interventions, which would be crucial steps toward protecting the mother and child from gestational mortality and morbidity and an increased risk of cardiovascular disease later in life. This study includes early placentae samples from the fetal part (villi; n=10), maternal part (Decidua; n=3), late placentae samples from healthy pregnancies, villi (n=6), decidua (n=4), and late placentae samples from early onset preeclamptic pregnancies, villi (n=5) and decidua (n=5).
| EGAS00001005681 | EGA
Project description:The goal of this study was to transcriptionally profile the three layers of the human placenta (decidua, fetal membrane and placental villi) from preterm and term human placentas
2022-03-30 | GSE184830 | GEO
Project description:Pathophysiological pregnancies amy result from gene-environmental interactions. In this study, investigation of the placental cell development in both chorionic villi and decidua of variant forms of pathophysiological pregnancies was pursued with a single cell RNA sequencing. Transcriptomic gene differential expression in variant placental cell clusters from chorionic villi and decidua of pregnancies, unique marker genes in trophoblasts that may lead to identification of biomarker for placental cell development states and cell-specific pathway activities were identified. In addition, gene expression profiles of ACE2 and TMPRSS2, the two key proteins involved in SARS-CoV-2 infection, in variant placental cell clusters was documented, which may facilitate exploration of vertical transmission of COVID-19 from mother to fetus.
2022-10-12 | GSE174399 | GEO
Project description:Spontaneous preterm birth (sPTB) is a leading cause of maternal and neonatal morbidity and mortality, yet its prevention and early risk stratification are limited. Previous investigations have suggested that vaginal microbes and metabolites may be implicated in sPTB. Here we performed untargeted metabolomics on 232 second-trimester vaginal samples, 80 from pregnancies ending preterm. We find multiple associations between vaginal metabolites and subsequent preterm birth, and propose that several of these metabolites, including diethanolamine and ethyl glucoside, are exogenous. We observe associations between the metabolome and microbiome profiles previously obtained using 16S ribosomal RNA amplicon sequencing, including correlations between bacteria considered suboptimal, such as Gardnerella vaginalis, and metabolites enriched in term pregnancies, such as tyramine. We investigate these associations using metabolic models. We use machine learning models to predict sPTB risk from metabolite levels, weeks to months before birth, with good accuracy (area under receiver operating characteristic curve of 0.78). These models, which we validate using two external cohorts, are more accurate than microbiome-based and maternal covariates-based models (area under receiver operating characteristic curve of 0.55-0.59). Our results demonstrate the potential of vaginal metabolites as early biomarkers of sPTB and highlight exogenous exposures as potential risk factors for prematurity.
2022-11-21 | MTBLS702 | MetaboLights
Project description:Whole-transcriptome profiles of individual human placental villi samples from twenty-five (25) Indian women with normal pregnancies during 6- to 8-weeks of gestation were examined using human whole genome expression arrays (NimbleGen 135K). The present study focused on the whole-transcriptome profiling using NimbleGen135K (070925_HG18_exp__12X135K) human whole genome expression arrays of individual human placental villi samples obtained from twenty-five (25) proven-fertile women bearing normal pregnancies voluntarily terminated between 6- and 8-weeks of gestation. Gestational age was estimated from menstrual history, physical and ultrasonographic evaluation. No case of complicated pregnancy from infection, and other significant fetal and maternal clinical indications was included. These twenty five (25) samples include biological replicates of 6, 7 and 8 weeks placental villi samples.
2013-01-09 | E-GEOD-37653 | biostudies-arrayexpress
Project description:The goal of this study was to transciprtionally profile the three layers of the human placenta (decidua, fetal membrane and placental villi) from the mid-gestation healthy human placenta.
2022-01-27 | GSE178152 | GEO
Project description:To explore the changes of local microenvironment in the feto-maternal interface during early pregnancy in RSA, we next examined the transcriptional profiles of the decidua tissue by RNA sequencing using samples from 3 RSA patients and 3 healthy controls
2021-06-22 | GSE178535 | GEO
Project description:We performed high-throughput RNA sequencing (RNA-Seq) of human myometrium from singleton and twin pregnancies at term (> 37+0 weeks) and preterm (< 37+0 weeks), collected during pre-labour Caesarean Section.
2020-01-08 | E-MTAB-8233 | biostudies-arrayexpress
Project description:Recurrent miscarriage (RM) is the occurrence of repeated pregnancies that end in miscarriage of the fetus before 20 weeks of gestation. Recurrent miscarriages affect about 1-2% of couples trying to conceive; however, mechanisms leading to this complication are largely unknown. Our previous studies using comparative proteomics identified 314 differentially expressed proteins (DEPs) in placental villous. In this study, we identified 5479 proteins from a total of 34157 peptides in decidua of patients with early recurrent miscarriage. Further analysis identified 311 DEPs in the decidua tissue; 159 proteins showed the increased expression while 152 proteins showed decreased expression. These 311 proteins were further analyzed using Ingenuity Pathway Analysis (IPA). The results suggested that 50 DEPs could play important roles in the embryonic development. Furthermore, network analysis of the placental villous and decidua embryonic development DEPs was performed in STRING database to find the core gene. This study identifies several proteins that are specifically associated with embryonic development in decidua of patients with early recurrent miscarriage, these results provide new insights into potential biological mechanisms and may ultimately inform recurrent miscarriage.
2021-07-30 | PXD023849 | Pride
Project description:The maternal and paternal copies of the genome are both required for mammalian development and this is primarily due to imprinted genes, those that are mono-allelically expressed based on parent-of-origin. Typically, this pattern of expression is regulated by differentially methylated regions (DMRs) that are established in the germline and maintained after fertilisation. There are a large number of germline DMRs that have not yet been associated with imprinting and their function in development is unknown. In this study, we developed a genome-wide approach to identify novel imprinted DMRs, specifically in the human placenta, and investigated the dynamics of imprinted DMRs during development in somatic and extra-embryonic tissues. DNA methylation was evaluated using the Illumina HumanMethylation450 array in 116 human tissue samples, publically available reduced representation bisulfite sequencing in the human embryo and germ cells, and targeted bisulfite sequencing in term placentas. 43 known and 101 novel imprinted DMRs were identified in the human placenta, by comparing methylation between diandric and digynic triploids and female and male gametes. 72 novel DMRs showed a pattern consistent with placental-specific imprinting and this mono-allelic methylation was entirely maternal in origin. Strikingly, these DMRs exhibited polymorphic imprinted methylation specifically in placenta. These data suggest that imprinting in human development is far more extensive and dynamic than previously reported and that the placenta preferentially maintains maternal germline-derived DNA methylation For the identification of imprinted DMRs in the placenta, chorionic villous samples from 5 diandric and 5 digynic triploids pregnancies were assayed, along with a pooled sample of complete hydatiform moles (CHM). Placental chorionic villous samples (n=63) included 29 control pregnancies delivered at term, while the remaining 34 were delivered preterm or miscarried, or had abnormal MSS results, IUGR or LOPET. The preterm births were associated with one or more of: preterm labour, premature rupture of membranes (PROM), chorioamnionitis, placental abruption, and incompetent cervix. All samples were determined to be chromosomally normal using standard karyotyping or comparative genome hybridization, as previously described (Robinson et al. 2010). Two to four independent sites were taken from each placenta and after DNA extraction from chorionic villous, the DNA was pooled before being utilized in this study. Thirty-three fetal tissues, including brain (n=8), spinal cord (n=7), muscle (n=9), and kidney (n=9) were collected from second trimester foetuses, as previously described (Price et al. 2012). Adult female whole blood samples (n=10) were collected from control women. Extra-embryonic cell types (n=19), including cord blood (embryonic), cord, amniotic membrane, chorionic membrane, 1st, 2nd and 3rd trimester trophoblast and mesenchyme, and decidua (maternal), were isolated from control placental samples.
2015-12-22 | E-GEOD-74738 | biostudies-arrayexpress