Differentially expressed microRNAs revealed by molecular signatures of Preeclampsia and IUGR in human placenta
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ABSTRACT:
ORGANISM(S): Homo sapiens
SUBMITTER: Ling Guo
PROVIDER: E-GEOD-35574 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
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Project description:The placenta plays an important role as a regulator of fetal nutrition and growth throughout development and placental factors contribute to gestational abnormalities such as preeclampsia. This study describes the genome-wide gene expression profiles of a large (n=60) set of human placentas in order to uncover gene expression patterns associated with preeclampsia. In addition to confirming changes in expression of soluble factors associated with preeclampsia such as sFLT1 (soluble fms-like tyrosine kinase-1), sENG (soluble endoglin), and INHA (inhibin alpha), we also find changes in immune-associated signaling pathways, offering a potential upstream explanation for the shallow trophoblast invasion and inadequate uterine remodeling typically observed in pathogenesis of preeclampsia. Notably, we also find evidence of preeclampsia-associated placental upregulation of sialic acid acetylesterase (SIAE), a gene functionally associated with autoimmune diseases. 23 preeclamptic, and 37 control placentas included in this study were collected during the years of 2004-2008 and hybridized in two batches to microarrays. Samples were randomized across arrays to control for array and batch variability.
2010-12-10 | E-GEOD-25906 | 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: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.
2008-08-01 | GSE12216 | GEO
Project description:The placenta plays an important role as a regulator of fetal nutrition and growth throughout development and placental factors contribute to gestational abnormalities such as preeclampsia. This study describes the genome-wide gene expression profiles of a large (n=94) set of human placentas in order to uncover gene expression patterns (or molecular signatures) associated with preeclampsia and IUGR. Besides modulated modularity clustering and pathway analysis, a set of candidate miRNAs were predicted by Gene Set Enrichment Analysis (GSEA) based on differentially expressed genes. A case-control study was conducted to examine the expression patterns of these candidate miRNAs in human placentas
2012-02-07 | GSE35574 | GEO
Project description:Background: Long non-coding RNAs (lncRNAs) are an important class of pervasive genes involved in a variety of biological functions. They are aberrantly expressed in many types of diseases. We want to study the lncRNAs profiles in preeclampsia. Preeclampsia has been observed in patients with molar pregnancy where a fetus is absent demonstrating that the placenta is sufficient to cause the condition. So we analyze the lncRNAs profiles in preeclampsia placentas. In this study, we described the lncRNAs profiles in 6 preeclampsia placentas (T) and 5 matched normal pregnancy placentas (N) tissues by microarray. Methodology/Principal Findings: With abundant and varied probes accounting 33,045 LncRNAs in our microarray, the number of lncRNAs that expressed at a certain level could be detected is 28,443. From the data we found there were 738 lncRNAs that differentially expressed (M-bM-^IM-%1.5 fold-change) among preeclampsia placentas compared with matched controls. Up to 18,063 coding transcripts could be detected in placenta samples through 30,215 coding transcripts probes. Coding-non-coding gene co-expression networks (CNC network) were constructed based on the correlation analysis between the differential expressed lncRNAs and mRNAs. According to the GO-Pathway analysis of differential expressed lncRNAs/mRNAs, we choose three lncRNAs to analyze the relationship between lncRNAs and preeclampsia. LOC391533, LOC284100, CEACAMP8 were evaluated by qPCR in 40 of preeclampsia placentas and 40 of controls. The results showed three lncRNAs were aberrantly expressed in preeclampsia placentas compared with controls. Conclusions/Significance: Our study is the first one to determine genome-wide lncRNAs expression patterns in preeclampsia placenta by microarray. The results displayed that clusters of lncRNAs were aberrantly expressed in preeclampsia placenta compared with controls, which revealed that lncRNAs differentially expressed in preeclampsia placenta may exert a partial or key role in preeclampsia development. Misregulation of LOC391533, LOC284100, CEACAMP8 might be associated with preeclampsia. Taken together, this study may provide potential targets for future treatment of preeclampsia and novel insights into preeclampsia biology. LncRNAs/mRNAs profiles in 6 preeclampsia placentas and 5 matched normal pregnancy placentas tissues by microarray using Arraystar v2.0.
2013-09-12 | E-GEOD-50783 | biostudies-arrayexpress
Project description:Transcriptome analysis of RNA samples from mice olfactory epithelium Gene expression profiling in the olfactory epithelium was performed to obtain a better understanding of the processes mediating cell replacement. We analyzed epitheliual tissue from 3 adult male mice at 5 days following ipsilateral olfactory bulbectomy (OBX). Total RNA was isolated and anlayzed using the Affymetrix Mouse Exon 1.0 ST platform. Array data was processed by Affymetrix Exon Array Computational Tool.
2013-04-11 | E-GEOD-45931 | biostudies-arrayexpress
Project description:IUGR (Intra-Uterine Growth Restriction) refers to a condition where the foetus does not reach its growth potential in utero. It is supposed to be often linked with placental dysfunction, especially of vascular origin. In this study, 4 pools of three placentas from human normal pregnancies and 4 pools of three placentas from IUGR human pregnancies, obtained after caesarean section near normal term , were used to prepare RNA. The cDNAs prepared from these RNA were hybridized to a Nimblegen expression array in order to detect differences in gene expression between normal and pathological placentas.
2014-01-14 | E-MTAB-1956 | biostudies-arrayexpress
Project description:Preeclampsia is a severe placenta-related pregnancy disorder that is generally divided into two subtypes named early-onset preeclampsia (onset <34 weeks of gestation), and lateonset preeclampsia (onset ≥34 weeks of gestation), with distinct pathophysiological origins. Both forms of preeclampsia have been associated with maternal systemic inflammation. However, alterations in the placental immune system have been less well characterized. Here, we studied immunological alterations in early- and late-onset preeclampsia placentas using a targeted expression profile approach. RNA was extracted from snap-frozen placenta samples (healthy n=13, early-onset preeclampsia n=13, and late-onset preeclampsia n=6). The expression of 730 immune-related genes from the Pan Cancer Immune Profiling Panel was measured, and the data were analyzed Q10 in the advanced analysis module of nSolver software (NanoString Technology). The results showed that early-onset preeclampsia placentas displayed reduced expression of complement, and toll-like receptor (TLR) associated genes, specifically TLR1 and TLR4. Mast cells and M2 macrophages were also decreased in early-onset preeclampsia compared to healthy pl acentas. The findings were confirmed by an immunohistochemistry approach using 20 healthy, 19 early-onset preeclampsia, and 10 late-onset preeclampsia placentas. We conclude that the placental innate immune system is altered in early-onset preeclampsia compared to uncomplicated pregnancies. The absence of these alterations in late-onset preeclampsia placentas indicates dissimilar immunological profiles. The study revealed distinct pathophysiological processes in earlyonset and late-onset preeclampsia placentas and imply that a tailored treatment to each subtype is desirable.
2021-12-13 | GSE190639 | GEO
Project description:Background: Long non-coding RNAs (lncRNAs) are an important class of pervasive genes involved in a variety of biological functions. They are aberrantly expressed in many types of diseases. We want to study the lncRNAs profiles in preeclampsia. Preeclampsia has been observed in patients with molar pregnancy where a fetus is absent demonstrating that the placenta is sufficient to cause the condition. So we analyze the lncRNAs profiles in preeclampsia placentas. In this study, we described the lncRNAs profiles in 6 preeclampsia placentas (T) and 5 matched normal pregnancy placentas (N) tissues by microarray. Methodology/Principal Findings: With abundant and varied probes accounting 33,045 LncRNAs in our microarray, the number of lncRNAs that expressed at a certain level could be detected is 28,443. From the data we found there were 738 lncRNAs that differentially expressed (≥1.5 fold-change) among preeclampsia placentas compared with matched controls. Up to 18,063 coding transcripts could be detected in placenta samples through 30,215 coding transcripts probes. Coding-non-coding gene co-expression networks (CNC network) were constructed based on the correlation analysis between the differential expressed lncRNAs and mRNAs. According to the GO-Pathway analysis of differential expressed lncRNAs/mRNAs, we choose three lncRNAs to analyze the relationship between lncRNAs and preeclampsia. LOC391533, LOC284100, CEACAMP8 were evaluated by qPCR in 40 of preeclampsia placentas and 40 of controls. The results showed three lncRNAs were aberrantly expressed in preeclampsia placentas compared with controls. Conclusions/Significance: Our study is the first one to determine genome-wide lncRNAs expression patterns in preeclampsia placenta by microarray. The results displayed that clusters of lncRNAs were aberrantly expressed in preeclampsia placenta compared with controls, which revealed that lncRNAs differentially expressed in preeclampsia placenta may exert a partial or key role in preeclampsia development. Misregulation of LOC391533, LOC284100, CEACAMP8 might be associated with preeclampsia. Taken together, this study may provide potential targets for future treatment of preeclampsia and novel insights into preeclampsia biology.
2013-09-12 | GSE50783 | GEO
Project description:The placental microvasculature of the human fetus is essential for the efficient transfer of gases, nutrients and waste between the mother and fetus. Microvascular hypoplasia of the terminal villi is associated with the placental pathology observed in cases of severe Intra Uterine Growth Restriction (IUGR). We used novel methods to isolate a pure population of placental microvascular endothelial cells from control preterm placentas (n=3) and placenta complicated by severe IUGR (n=6) with superimposed preeclampsia (n=5). Distal placental villous tissue was collected to enrich for terminal villi. Tissue was minced, digested and placental microvascular endothelial cells (PlMEC) were positively selected using tocosylated magnetic Dynabeads labeled with Human Endothelial Antigen lectin. The purity of the PlMEC (95%) was assessed by CD31 immunocytochemistry. RNA was extracted from the PlMEC samples and also from 3 term placenta and subjected to Affymetrix microarray analysis (U133Plus2 array chips). Data from the 3 term placentas and 3 preterm PlMEC arrays was used to generate an endothelial cell specific gene profile. This profile was used to identify the endothelial genes differentially regulated in all 6 IUGR cases. BTNL9 and NTRK2 transcripts were upregulated and SAA1, GNAS and SLAMF1 transcripts were downregulated as relative to the preterm controls. These changes were validated by Real time PCR in the PlMEC samples. This novel study is the first to identify endothelial candidate genes that may play a role in the villous hypoplasia of severe IUGR. This work advances our understanding of the molecular defects in placental microvascular endothelial cells in normal and pathologic pregnancies.
2012-04-01 | GSE25861 | GEO