Homo sapiens
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ABSTRACT:
PROVIDER: PRJNA96761 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Microarray analysis of differentially expressed genes from rats undergoing placental ischemia versus health controls Placental ischemia is believed to be an important contributor to human preeclampsia, though the targets induced by the ischemia remain unclear.
2013-09-05 | GSE50596 | GEO
Project description:Microarray analysis of differentially expressed genes from rats undergoing placental ischemia versus health controls Placental ischemia is believed to be an important contributor to human preeclampsia, though the targets induced by the ischemia remain unclear. Chorionic placental tissues from 6 control and 6 placental ischemic reduced uterine perfusion pressure (RUPP) rats were analyzed for gene expression by microarray.
2013-09-05 | E-GEOD-50596 | biostudies-arrayexpress
Project description:Placental gene expression in severe preeclampsia.
| PRJNA107859 | ENA
Project description:Preeclampsia (PE), which affects 2-7% of human pregnancies, causes significant maternal and neonatal morbidity and mortality. To better understand the pathophysiology of PE, gene expression profiling of placental tissue from 5 controls and 5 PEs were assessed using microarray. A total of 224 transcripts were identified as being significantly differentially expressed (fold change > 2 and q value < 0.05 in the SAM software), GO enrichment analysis indicated that genes involved hypoxia, oxidative and reductive processes were significantly changed. Ten differentially expressed genes (DEGs) involved in these biological process were further verified by quantitative real-time PCR. Finally, the potential therapeutic agents for PE were explored via Connectivity Map database . In conclusion, the data obtained in this study might provide clues to better understand the pathophysiology of PE and found potential therapeutic agents for PE patients. gene expression profiling of placental tissue from 5 controls and 5 PEs were assessed using microarray.
2013-10-01 | E-GEOD-47187 | biostudies-arrayexpress
Project description:Analysis of genome-wide gene expression in placentas from women with preterm severe preeclampsia, with or without HELLP syndrome, compared to gestational age-matched controls. The hypothesis tested in the present study was that placental transcriptomic changes in preeclampsia are considerably different from controls. The results provide important information on placental transcriptomic changes in preeclampsia.
2018-12-30 | GSE66273 | GEO
Project description:Preeclampsia (PE), which affects 4-8% of human pregnancies, causes significant maternal and neonatal morbidity and mortality. Within the basal plate, placental cytotrophoblasts (CTBs) of fetal origin invade the uterus and extensively remodel the maternal vasculature. In PE, CTB invasion is often shallow, and vascular remodeling is rudimentary. To better understand possible causes, we conducted a global analysis of gene expression at the maternal-fetal interface in placental samples from women with PE (n = 12; 24-36 wk) vs. samples from women who delivered due to preterm labor with no evidence of infection (n = 11; 24-36 wk), a condition that our previous work showed is associated with normal CTB invasion. Using the HG-U133A&B Affymetrix GeneChip platform, and statistical significance set at log odds-ratio of B >0, 55 genes were differentially expressed in PE. They encoded proteins previously associated with PE [e.g. Flt-1 (vascular endothelial growth factor receptor-1), leptin, CRH, and inhibin] and novel molecules [e.g. sialic acid binding Ig-like lectin 6 (Siglec-6), a potential leptin receptor, and pappalysin-2 (PAPP-A2), a protease that cleaves IGF-binding proteins]. We used quantitative PCR to validate the expression patterns of a subset of the genes. At the protein level, we confirmed PE-related changes in the expression of Siglec-6 and PAPP-A2, which localized to invasive CTBs and syncytiotrophoblasts. Notably, Siglec-6 placental expression is uniquely human, as is spontaneous PE. The functional significance of these novel observations may provide new insights into the pathogenesis of PE, and assaying the circulating levels of these proteins could have clinical utility for predicting and/or diagnosing PE. Keywords: disease state analysis Basal plate biopsies of preterm labor (24-36 weeks; n=11) and preterm severe preeclampsia (24-36 weeeks; n=12) were isolated and the global gene expression profiles determined using Affymetrix Human GeneChips. Comparisons between the preeclampsia samples and the preterm labor controls revealed genes differentially expressed in preeclampsia.
2009-02-06 | E-GEOD-14722 | biostudies-arrayexpress
Project description:Intrauterine growth restriction (IUGR) represents a major obstetric challenge with perinatal complications and a risk factor of developing disease in adult life. Placental insufficiency is one of the common features accompanying IUGR. The aim of this study was to evaluate global placental gene expression profile in IUGR compared to normal pregnancies. Placental samples were collected by eight IUGR pregnancies with placental insufficiency ascertained by Doppler and eight healthy controls. A 30K Human Genome Survey Microarray v.2.0 (Applied Biosystems) was used to evaluate global gene expression profile. Principal component analysis showed good separation in terms of gene expression patterns between the groups. Pathway analysis with Bonferroni correction for multiple testing showed significant (p<0.05) up-regulation of inflammation mediated by chemokine and cytokine signalling pathway in the IUGR placentas. Genes involved in metabolism of glucocorticoids (HSD11B1 and DHRS2) were found differentially expressed. We found no imprinted genes to be differentially expressed and only one gene involved in epigenetic modifications (MBD3) to be down-regulated in the IUGR placentas, indicating that IUGR due to placental insufficiency is not associated to placental imprinting. Subgroup analysis between pure IUGR and IUGR with preeclampsia placentas showed only 27 differentially expressed genes suggesting common pathophysiology. Eight placental samples from normal human placenta compared to eight human placental samples from patients with intrauterine growth restrictions due to placental insufficiency
2008-08-01 | E-GEOD-12216 | biostudies-arrayexpress
Project description:Dysregulated RNA editing is well documented in several diseases such as cancer. The extent to which RNA editing might be involved in diseases originated in the placenta such as preeclampsia remains unknown, because RNA editing has rarely been studied in the placenta. Here, the RNA editome is systematically profiled on placentae from 9 patients with early-onset severe preeclampsia (EOSPE) and 32 normal controls, and a widespread RNA editing dysregulation in EOSPE has been identified. The mis-edited gene set is enriched with known preeclampsia-associated genes and differentially expressed genes in EOSPE. The “RNA editing events” at two microRNA binding sites in 3’-UTR of the LEP mRNA have been generated, which leads to increased expression level of LEP in trophoblast cells. Upregulation of LEP is also observed in the placentae of PE patients. These results suggest that widespread placental RNA editing may be involved in placental development and dysregulation of RNA editing in the placenta may contribute to the pathogenesis of preeclampsia.
2020-04-20 | GSE148241 | 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:Preeclampsia is usually considered as a placental basis of diseases, as there are many differently expressed proteins or pathogenic proteins expressed in the placenta. Owing to the important role of post-transcriptional gene regulation in phenotypes and functions of cells, non-coding ribonucleic acid (ncRNA) molecules contributed to the regulation. We collected 7 placental samples from 3 preeclampsia patients and 4 normal women, focused on the basal plate of placenta, as it is the direct connection of mother and fetal, and adopted SBC human ceRNA array V1.0（4×180K）and human miRNA microarray (8*60 K). The results revealed that expressions of 2840 lncRNAs, 1093 mRNAs, 4282 circRNAs and 4 miRNAs were different between preeclampsia and normal placentas. The functions of differentially expressed lncRNAs and co-expressed potential targeting genes were predicted by analyzing Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) biological pathway analysis. Furthermore, we analyzed and find the co-expression and interaction patterns of different RNAs and possible ceRNA mechanism. The present study provided a systematic perspective on the potential function of non-coding RNAs (ncRNAs) in the pathogenesis of preeclampsia.
2018-03-01 | GSE96984 | GEO