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E-GEOD-24594

ABSTRACT: Transcription profiling by array of mammary gland tumors from FVB mice mutant for E2F

OTHER RELATED OMICS DATASETS IN: PRJNA132381

PROVIDER: E-GEOD-24594 | ExpressionAtlas | 2014-07-03

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-GEOD-24594-analysis-methods.tsv	Tabular
	E-GEOD-24594-atlasExperimentSummary.Rdata	Rdata
	E-GEOD-24594-configuration.xml	Xml
	E-GEOD-24594-percentile-ranks.tsv	Tabular
	E-GEOD-24594-zoomifications-log.tsv	Tabular

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Project description:Clinical studies have linked use of progestins (synthetic progesterone (P4)) to breast cancer risk. However, little is understood regarding the role native P4, signaling through the progesterone receptor (PR), plays in formation of breast tumors. Studies published by our lab highlighted a link between PR and immune signaling pathways, suggesting PR induces PR to repress the interferon signaling pathway. Given these findings, we sought to investigate whether P4/PR drive immunomodulation in the mammary gland and development of mammary gland tumors. We found that mice treated with P4 displayed changes in the mammary gland suggesting inhibited immune response compared to placebo-treated mice. Furthermore, transgenic mice with PR overexpression demonstrated decreased numbers of immune cell populations in their mammary gland, lymph nodes, and spleens. Upon long-term monitoring, we determined that multi-parous PR overexpressing mice developed significantly more mammary gland tumors than control mice. Additionally, tumors of PR overexpressing mice contained fewer infiltrating immune cells. Finally, RNA sequencing analysis of tumor samples revealed that immune-related gene signatures were enriched in tumors of control mice compared to tumors of PR overexpressing mice. Together, these findings provide a novel mechanism behind P4-mediated promotion of mammary gland tumor development and provide rationale to investigate anti-progestin treatment to promote immune-mediated elimination of mammary gland tumors.

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