Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of human breast cancer cells expressing ERalpha and treated with 17beta-estradiol


ABSTRACT: Gene expression changes caused by estrogen treatment of breast cancer cells that re-express ERalpha was investigated by infecting ER-negative MDA-MB-231 breast cancer cells for 24 h with recombinant adenovirus encoding full-length human ERalpha (Ad-ERalpha) or control vector (Ad-LacZ), and treating them with 0·01% ethanol (vehicle control) or 10-8 M 17beta-estradiol (E2). After 48 h of treatment, total RNA was isolated and used for transcript profiling on Affymetrix GeneChips. Three independent biological replicates of this experiment were carried out.

ORGANISM(S): Homo sapiens

SUBMITTER: Fei Ling Lim 

PROVIDER: E-GEOD-2251 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Anti-proliferative effect of estrogen in breast cancer cells that re-express ERalpha is mediated by aberrant regulation of cell cycle genes.

Moggs J G JG   Murphy T C TC   Lim F L FL   Moore D J DJ   Stuckey R R   Antrobus K K   Kimber I I   Orphanides G G  

Journal of molecular endocrinology 20050401 2


Estrogen receptor (ER)-negative breast carcinomas do not respond to hormone therapy, making their effective treatment very difficult. The re-expression of ERalpha in ER-negative MDA-MB-231 breast cancer cells has been used as a model system, in which hormone-dependent responses can be restored. Paradoxically, in contrast to the mitogenic activity of 17beta-estradiol (E2) in ER-positive breast cancer cells, E2 suppresses proliferation in ER-negative breast cancer cells in which ERalpha has been r  ...[more]

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