E-MTAB-4541
Ontology highlight
ABSTRACT:
PROVIDER: E-MTAB-4541 | ExpressionAtlas | 2025-01-23
REPOSITORIES: ExpressionAtlas
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| E-MTAB-4541-analysis-methods.tsv | Tabular | |||
| E-MTAB-4541-atlasExperimentSummary.Rdata | Rdata | |||
| E-MTAB-4541-configuration.xml | Xml | |||
| E-MTAB-4541-percentile-ranks.tsv | Tabular | |||
| E-MTAB-4541.condensed-sdrf.tsv | Tabular |
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Project description:Maternal obesity in pregnancy is associated with increased birth-weight, obesity and premature mortality in adult offspring. The Effect of Metformin on Maternal and Fetal Outcomes in Pregnant Obese Women (EMPOWaR) trial was a randomised, double-blind, placebo-controlled trial carried out to determine whether exposure to Metformin would affect the offspring birth-weight centile. Obese women exposed to Metformin had increased insulin sensitivity at 36 weeks of pregnancy, but there were no differences in offspring birthweight. We obtained the placentas from these women to determine whether there were differences in expression of genes regulating fetal growth and metabolism. In a complementary study we investigated DNA methylation in the same samples.
2019-01-31 | E-MTAB-6418 | biostudies-arrayexpress
Project description:Maternal obesity in pregnancy is associated with increased birth-weight, obesity and premature mortality in adult offspring. The Effect of Metformin on Maternal and Fetal Outcomes in Pregnant Obese Women (EMPOWaR) trial was a randomised, double-blind, placebo-controlled trial carried out to determine whether exposure to Metformin would affect the offspring birth-weight centile. Obese women exposed to Metformin had increased insulin sensitivity at 36 weeks of pregnancy, but there were no differences in offspring birthweight. We obtained the placentas from these women to determine whether there were differences in DNA methylation of genes regulating fetal growth and metabolism. In a related study we investigated the gene expression in the same samples.
2018-11-01 | E-MTAB-6421 | biostudies-arrayexpress
Project description:Full-term pregnancy (FTP) at an early age confers long-term protection against breast cancer, in this study, we evaluated gene expression changes induced by parity in the breast of premenopausal women. Gene expression profiling of normal breast tissue from 30 nulliparous (NP) and 79 parous (P) premenopausal volunteers were performed using Affymetrix microarrays. In addition to a discovery/validation analysis, we conducted analysis of gene expression differences in P vs. NP women as a function of time since last FTP.
2019-03-19 | GSE112825 | GEO
Project description:Activation of inflammatory pathways is one plausible mechanism underlying the association between obesity and increased breast cancer risk. However, macrophage infiltration and local biomarkers of inflammation in breast adipose tissue have seldom been studied in association with obesity. Gene expression profiles of normal breast tissue from reduction mammoplasty patients were evaluated by whole genome microarrays to identify patterns associated with obesity status (normal-weight, body mass index (BMI) <25; overweight, BMI 25-29.9; obese, BMI > or equal to 30). The presence of macrophage-enriched inflammatory loci with immunopositivity for CD68 protein was evaluated by immunohistochemistry (IHC). After adjusting for confounding by age, 760 genes were differentially expressed (203 up and 557 down; FDR = 0.026) between normal-weight and obese women. Gene ontology analysis suggested significant enrichment for pathways involving IL-6, IL-8, CCR5 signaling in macrophages and RXRalpha and PPARalpha activation, consistent with a pro-inflammatory state and suggestive of macrophage infiltration. Gene set enrichment analysis also demonstrated that the genomic signatures of monocytes and macrophages were over-represented in the obese group with FDR of 0.08 and 0.13, respectively. Increased macrophage infiltration was confirmed by IHC, which showed that the breast adipose tissue of obese women had higher average macrophage counts (mean = 8.96 vs. 3.56 in normal-weight women) and inflammatory foci counts (mean = 4.91 vs. 2.67 in normal-weight women). Obesity is associated with local inflammation and macrophage infiltration in normal human breast adipose tissues. Given the role of macrophages in carcinogenesis, these findings have important implications for breast cancer etiology and progression. 72 normal breast tissue samples from patients undergoing reduction mammoplasty. Reference design.
2011-11-08 | E-GEOD-33526 | biostudies-arrayexpress
Project description:It is widely accepted that a womanâs lifetime risk of developing breast cancer at menopause is reduced by early full term pregnancy and multiparity. This phenomenon is associated with the development and differentiation of the breast, which ultimately imprints a specific genomic profile in the mammary epithelium. In the present work we demonstrate that this profile represents a permanent signature that could be associated with the breast cancer risk reduction conferred by pregnancy. We have compared the gene expression profile of normal breast biopsies performed in 71 parous (P) and 42 nulliparous (NP) postmenopausal women. All samples were hybridized to Affymetrix HG_U133 Plus 2.0 oligonucleotide arrays. We compared the gene expression profile of normal breast core biopsies from 71 parous (women that had a full term pregnancy) and 42 nulliparous (women that never completed a pregnancy) postmenopausal women from Sweden. All samples were hybridized to Affymetrix HG_U133 Plus 2.0 oligonucleotide arrays.
2012-10-25 | E-GEOD-26457 | biostudies-arrayexpress
Project description:Aim: This study aimed to analyze the salivary proteomic profile related to obesity and periodontitis in women during pregnancy and after delivery. Materials and methods: The sample assisted during the 3rd trimester of pregnancy (T1) and after childbirth (T2) was divided into: with obesity and periodontitis (OP = 8); with obesity and without periodontitis (OWP = 10); with normal BMI but with periodontitis (NP = 10); with normal BMI and without periodontitis (NWP = 10). The proteins were extracted and processed individually by label-free proteomics (nLC-ESI-MS/MS). ProteinLynx GlobalServer software was used to process and search the data, and the proteins were analyzed by their access number by UniProt catalog. Results: The up-regulation of Heat shock protein (HSP) 70 kDa 1A, 1B and 1-like were related to both obesity and periodontitis, separately. Albumin and thioredoxin were up-expressed in periodontitis cases, while Cystatins (mainly S, SA, SN) and Lactotransferrin were down-expressed. The high abundance of Submaxillary gland androgen-regulated protein 3B, S100A8, Matrix metalloproteinase-9 (MMP9), HSP 70 kDa 2 and 6, Putative HSP 70 kDa 7, HSP 71 kDa, Haptoglobin and Plastin-1 were significant in the combination of obesity and periodontitis. Conclusion: Obesity and periodontitis remarkably altered the proteome of the saliva during pregnancy with substantial alterations after delivery. Proteins related to humoral immune response and antibacterial humoral response were highly expressed in women with periodontitis, while proteins related to glycolytic, carbohydrate catabolic, glucose metabolic, organophosphate metabolic and carbohydrate derivative metabolic processes were more expressed in individuals with obesity.
2023-02-23 | PXD034328 | Pride
Project description:Activation of inflammatory pathways is one plausible mechanism underlying the association between obesity and increased breast cancer risk. However, macrophage infiltration and local biomarkers of inflammation in breast adipose tissue have seldom been studied in association with obesity. Gene expression profiles of normal breast tissue from reduction mammoplasty patients were evaluated by whole genome microarrays to identify patterns associated with obesity status (normal-weight, body mass index (BMI) <25; overweight, BMI 25-29.9; obese, BMI > or equal to 30). The presence of macrophage-enriched inflammatory loci with immunopositivity for CD68 protein was evaluated by immunohistochemistry (IHC). After adjusting for confounding by age, 760 genes were differentially expressed (203 up and 557 down; FDR = 0.026) between normal-weight and obese women. Gene ontology analysis suggested significant enrichment for pathways involving IL-6, IL-8, CCR5 signaling in macrophages and RXRalpha and PPARalpha activation, consistent with a pro-inflammatory state and suggestive of macrophage infiltration. Gene set enrichment analysis also demonstrated that the genomic signatures of monocytes and macrophages were over-represented in the obese group with FDR of 0.08 and 0.13, respectively. Increased macrophage infiltration was confirmed by IHC, which showed that the breast adipose tissue of obese women had higher average macrophage counts (mean = 8.96 vs. 3.56 in normal-weight women) and inflammatory foci counts (mean = 4.91 vs. 2.67 in normal-weight women). Obesity is associated with local inflammation and macrophage infiltration in normal human breast adipose tissues. Given the role of macrophages in carcinogenesis, these findings have important implications for breast cancer etiology and progression.
2011-11-08 | GSE33526 | GEO
Project description:Maternal obesity is becoming a major health consideration for successful pregnancy outcomes. There is growing proof that maternal obesity has a negative influence on placental development and function, thereby adversely influencing offspring programming and health outcomes. However, the molecular mechanisms underlying these processes are so far poorly understood. We set out to analyse term placenta whole transcriptome in obese (n=5) and normoweight women (n=5), using Affymetrix microarray platform compromising of 50,000 probe sets. Our analysis shows that the placental transcriptome differs between normoweight and obese women. Different processes and pathways among placenta from obese women were dysregulated, including inflammation and immune responses, lipid metabolism, cell death and survival and cancer pathways, vasculogenesis and angiogenesis, and glucocorticoid receptor signaling pathway. Together, this global gene expression profiling approach demonstrates and confirms that maternal obesity creates a unique in utero environment that impairs placental transcriptome.
2017-01-07 | E-MTAB-4541 | biostudies-arrayexpress
Project description:Obesity has been linked to lifestyle and recently have been associated to DNA methylation changes that may cause alterations in the adipogenesis and lipid storage processes and contribute to the pathological state. We enrolled Obese (Ob) and Normal Weight (NW) women. We observed that DNA methylation patterns are different between normal weight and obese women. This can alter gene expression patterns affecting adipogenesis and lipid storage. This results confirms that an obesogenic lifestyle can promote epigenetic changes in the human DNA.
2021-02-12 | GSE166611 | GEO
Project description:Amniotic fluid was colelcted during midtrimester from 30 women and at term gestation from 68 women. Cell free RNA was profiled by HTA 2.0 arrays to study the effect of gestational age and other relevant convariates on gene expression and splicing during normal pregnancy.
2020-07-03 | GSE133824 | GEO