Expression data from breast samples of postmenopausal women
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE30010 | GEO | 2011/06/17
SECONDARY ACCESSION(S): PRJNA143683
REPOSITORIES: GEO
Similar Datasets
Project description:The objective of the study was to comprehensively compare the genomic profiles in the breast of parous and nulliparous postmenopausal women to identify genes that permanently change their expression following pregnancy. The study was designed as a two-phase approach. In the discovery phase, we compared breast genomic profiles of 37 parous with 18 nulliparous postmenopausal women. In the validation phase, confirmation of the genomic patterns observed in the discovery phase was sought in an independent set of 30 parous and 22 nulliparous postmenopausal women.
2011-06-17 | E-GEOD-30010 | 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: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:It is widely accepted that a woman’s 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.
2012-10-25 | GSE26457 | GEO
Project description:Aging increases breast cancer risk while an early first pregnancy reduces a woman’s life-long risk. Several studies have explored the effect of either aging or pregnancy on mammary epithelial cells (MECs), but the combined effect of both remains unclear. Here, we interrogate the functional and transcriptomic changes at single cell resolution in the mammary gland of aged nulliparous and parous mice to discover that pregnancy normalizes age-related imbalances in lineage composition, while also inducing a permanently differentiated cell state. Importantly, we uncover a minority population of Il33-expressing hybrid cells with high cellular potency that accumulate in aged nulliparous mice but is significantly reduced in aged parous mice. Functionally, IL33 treatment of basal, but not luminal, epithelial cells from young mice phenocopies aged nulliparous MECs and promotes formation of organoids with Tp53 knockdown. Collectively, our study demonstrates that pregnancy blocks the age-associated loss of lineage integrity in the basal layer through a decrease in Il33+ hybrid cells, potentially contributing to pregnancy-induced breast cancer protection.
2024-09-12 | GSE272933 | GEO
Project description:Aging increases breast cancer risk while an early first pregnancy reduces a woman’s life-long risk. Several studies have explored the effect of either aging or pregnancy on mammary epithelial cells (MECs), but the combined effect of both remains unclear. Here, we interrogate the functional and transcriptomic changes at single cell resolution in the mammary gland of aged nulliparous and parous mice to discover that pregnancy normalizes age-related imbalances in lineage composition, while also inducing a permanently differentiated cell state. Importantly, we uncover a minority population of Il33-expressing hybrid cells with high cellular potency that accumulate in aged nulliparous mice but is significantly reduced in aged parous mice. Functionally, IL33 treatment of basal, but not luminal, epithelial cells from young mice phenocopies aged nulliparous MECs and promotes formation of organoids with Tp53 knockdown. Collectively, our study demonstrates that pregnancy blocks the age-associated loss of lineage integrity in the basal layer through a decrease in Il33+ hybrid cells, potentially contributing to pregnancy-induced breast cancer protection.
2024-09-12 | GSE272932 | GEO
Project description:Case-control study for the analysis of the gene expression profile of epithelial cells microdissected from normal breast tissues obtained from 17 parous and 7 nulliparous women free of breast pathology (controls), and 39 parous and 8 nulliparous women with history of breast cancer (cases). Keywords: genetic modifications
2008-11-04 | GSE13293 | GEO
Project description:The aim of the experiment was to identify the change of gene expression in human ovaries between premenopausal women and postmenopausal women based on DNA microarrays analysis. 8 human ovary samples were assembled from premenopausal women (n=4) and from postmenopausal women (n=4), respectively. The active transcription profiles of human ovaries were identified through DNA microarrays. Differentially expressed genes (DEGs) were identified as at least two-fold change with statistical significance. Enrichment of functions and signaling pathways analysis were performed based on Gene Ontology and the Kyoto Encyclopedia of Genes and Genomes database.
2022-08-19 | E-MTAB-11494 | biostudies-arrayexpress
Project description:Case-control study for the analysis of the gene expression profile of epithelial cells microdissected from normal breast tissues obtained from 17 parous and 7 nulliparous women free of breast pathology (controls), and 39 parous and 8 nulliparous women with history of breast cancer (cases). Keywords: genetic modifications Four-condition experiment: nulliparous case, nulliparous control, parous case and parous control labeled with Cy5 and Universal human reference used as a common reference labeled with Cy3. Moderated t statistic was used as the basic statistic for significance analysis; it was computed for each probe and for each contrast. False discovery rate was controlled using the Benjamini and Hochberg. All genes with P value below a threshold of 0.05 were selected as differentially expressed, maintaining the proportion of false discoveries in the selected group below the threshold value, in this case 5%. Breast 11 parous control HuII, Breast 28 parous case HuII, and Breast 62 nulliparous control HuIII excluded: raw data is missing
2008-11-03 | E-GEOD-13293 | biostudies-arrayexpress
Project description:Adipocytes isolated from lean and obese postmenopausal women with no significant differences in metabolic syndrome parameters demonstrate changes in multiple inflammatory, metabolic and structural gene families.
2013-02-02 | GSE44000 | GEO