Effects of retinoids on estrogen-receptor-positive and -negative breast carcinoma cells: mRNA and miRNA profiling
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ABSTRACT:
ORGANISM(S): Homo sapiens
SUBMITTER: Maddalena Fratelli
PROVIDER: E-GEOD-18693 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
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Project description:The overall study explores differential sensitivity of estrogen-receptor-positive and -negative breast carcinoma cells to retinoids via gene expression and microRNA profiling in MCF7 and MDA-MB-231 cells. This Series reports results of transcriptional profiling of breast carcinoma cell lines comparing the effects of retinoic acid treatment (6 and 48 hours) on estrogen-receptor-positive (MCF7) and estrogen-receptor-negative (MDA-MB-231) cells. mRNA profiling: Retinoic-acid-treated (1microM) vs vehicle-treated cells, two time points (6 and 48h), two cell lines (MCF7 and MDA-MB-231). Two biological replicates for each condition, balanced dye design.
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Project description:This Series reports results of miRNA profiling of estrogen-receptor-positive (MCF7) and estrogen-receptor-negative (MDA-MB-231) cells. Retinoic Acid (RA) induces mir-21 in MCF-7 but not in MDA-MB-231 cells. MCF-7 and MDA-MB-231 cells were treated (or not) with retinoic acid (RA) and grown for either 6 hours or 48 hours. miRNA profiling: Factorial design 2x2x2 'cube'; main factors: RA, cells, time; interactions: RA.cells, RA.time, cells.time, RA.cells.time.
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Project description:The aim of the experiment was to gain insight into the role of estrogen receptor beta (ERβ) isoforms in the response of breast cancer MCF7 cells to antiestrogens and retinoids. To this end, clones of MCF7 cells constitutively expressing human ERβ1 (MCF7-ERβ1) or ERβ2 (MCF7-ERβ2) were established and used for the determination of the global transcriptional changes induced upon treatment with hydroxytamoxifen (OHT) and all-trans retinoic acid (ATRA). Gene signatures associated with each clone will shed light to the mechanism underlying the ERβ1- and ERβ2-mediated response of MCF7 cells to antiestrogens and retinoids.
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