Early onset preeclampsia (EOPE) in a model for early stage human placental trophoblast
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ABSTRACT:
PROVIDER: PRJNA488631 | ENA |
REPOSITORIES: ENA
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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.
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Project description:Placental Immune alterations in early-onset preeclampsia and late-onset preeclampsia
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Project description:Early onset preeclampsia (EOPE) affects about 0.4% of pregnancies and is characterized by impaired trophoblast (TB) invasion, resulting in a poorly perfused placenta. Here we have used an in vitro model for mimicking early trophoblast development to determine how early placental development differs between normal pregnancies and those affected by EOPE. Induced pluripotent stem cells (iPSC) were generated from umbilical cords of infants born to mothers who had EOPE and from controls. These iPSC were converted to TB, by exposing them to BMP4 and inhibitors of ACTIVIN A and FGF2 signaling (BAP treatment), under 5 % and 20 % O2, hypothesizing that 20% O2 would act as a stressor. Two embryonic stem cell lines (ESC; H1 and H9), 8 control (CTL) iPSC and 14 EOPE iPSC were tested to assess how well the differentiated TB cells invaded through a Matrigel-coated membrane.
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Project description:For understanding the relationship of preeclampsia and placental methylation,we performed an epigenome-wide association study in a Chinese cohort containing 22 early-onset preeclampsia patients and 20 normal controls. We used Illumina Infinium HumanMethylation450k BeadChip for detecting the methylation level, and used placental genomic DNA as sample. most of the significant CpG sites were hypomethylated in EOPE in the Chinese cohort.
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Project description:We investigated the DNA methylation and gene expression of 20 chorionic villi samples from early onset preeclampsia placentas to 20 gestational age matched controls. From this we were able to see a widespread disregulation in DNA methylation across a subset of genes in the genome. This may help to elucidate the underlying biological problems that lead to early onset preeclampsia. We noted that there were DNA methylation changes in many genes of importance as well as in different genomic elements such as enhancers. RNA from 8 Early Onset Preeclampsia placentas and 8 gestational age matched controls
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Project description:Preeclampsia is a life-threatening disorder of pregnancy unique to humans. Interleukin (IL)11 is elevated in serum from pregnancies that subsequently develop early-onset preeclampsia and pharmacological elevation of IL11 in pregnant mice causes the development of preeclampsia-like features (hypertension and proteinuria), however, the mechanism by which IL11 drives preeclampsia-like features is unknown. Using Next-generation sequencing we demonstrate that treatment with PEGylated IL11 (PEGIL11) inhibited placental expression of markers of spongiotrophoblast and syncytiotrophoblast linages and increased placental cathepsin production in wild-type and Asc-/- mice. Function studies showed that IL11 acts via Asc inflammasomes to induce tissue fibrosis and preeclampsia in mice. This study has far-reaching implications on our understanding of the underlying etiology of preeclampsia and the mechanism by which IL11 causes inflammation and fibrosis in many tissues and disease states.
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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:Placental disorders contribute to pregnancy complications including preeclampsia (PE) and fetal growth restriction (FGR), but debate regarding their specific pathobiology persists. Our objective was to apply transcriptomics with weighted gene correlation network analysis (WGCNA) to further clarify the placental dysfunction in these conditions.
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