Transcriptomics

Dataset Information

5

Effect of Medroxyprogesterone Acetate on Transcript Profile of Human Pregnant Myometrium


ABSTRACT: Context: Progesterone is important physiologically and therapeutically to maintain uterine quiescence during pregnancy. It acts in part through controlling myometrial gene expression. Objective: To use expression microarray and qRT-PCR validation to determine the changes in gene expression induced by prolonged exposure to a synthetic progestogen. Design: Myometrial explants, obtained at elective Caesarean section (n=9 patients), were maintained in culture, under 0.6g tension, for 3 days in the presence or absence of medroxyprogesterone acetate (MPA, 100nM). Expression array was performed using Illumina human-8 v3 beadchip arrays. Approximately 30% of differentially expressed transcripts were validated in biological replicates (n=10) using qRT-PCR. Results: Transcripts from 114 genes were significantly differentially expressed. These were significantly enriched in inflammatory response (P=0.00001), growth factor activity (P=0.0004) and cytokine activity genes (P=0.008). 34 transcripts were validated using qRT-PCR using an additional independent sample set obtained from 10 further women. There was very close agreement in the fold changes obtained by array and qRT-PCR analysis (r2=0.9, P<0.0001). We confirmed significant down-regulation of a number of genes which have been well characterized as progesterone sensitive, such as IL1B, IL6, PTGS2 and GJA1. However, the top and 6th most down-regulated genes encoded two cytokines, IL11 and IL24, respectively, not previously implicated in mediating the effects of progesterone in myometrium. Both were validated by qRT-PCR (4.3-fold and 2.2-fold down-regulated, both P<0.001). Conclusions: Progestogens control expression of multiple genes in myometrium, including many with no previously recognised role, including IL11 and IL24. It is plausible that proteins encoded by some of these genes may have important, but as yet uncharacterized effects in controlling human parturition. 9 paired samples of human myometrium treated with MPA (10-7M) or vehicle

ORGANISM(S): Homo sapiens  

SUBMITTER: D D Charnock-Jones   D. Stephen Charnock-Jones  Y Cordeaux  M Tattersall  G C Smith 

PROVIDER: E-GEOD-22961 | ArrayExpress | 2011-06-08

SECONDARY ACCESSION(S): GSE22961PRJNA127847

REPOSITORIES: GEO, ArrayExpress

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Publications

Effects of medroxyprogesterone acetate on gene expression in myometrial explants from pregnant women.

Cordeaux Yolande Y   Tattersall Mark M   Charnock-Jones D Stephen DS   Smith Gordon C S GC  

The Journal of clinical endocrinology and metabolism 20100915 12


CONTEXT: Progesterone is important physiologically and therapeutically to maintain uterine quiescence during pregnancy, in part through controlling myometrial gene expression. OBJECTIVE: The objective of the study was to use expression microarray and quantitative reverse transcriptase-PCR (qRT-PCR) validation to determine the changes in gene expression induced by prolonged exposure of human myometrium to a synthetic progestogen. DESIGN: Myometrial explants, obtained at elective cesarean section  ...[more]

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