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SiRNA profiling of human MCF7 cells with elimination of either TFAP2C or TFAP2A reveals TFAP2C regulates multiple pathways of estrogen signaling

ABSTRACT: We were interested in determining what genes might be controlled by TFAP2C and/or TFAP2A, either directly or indirectly through regulation of ER-alpha and potentially other signaling pathways. We performed an microarray analysis in MCF7 cells with elimination of either TFAP2C or TFAP2A. The patterns of gene expression with alteration of TFAP2 activity were compared to changes in expression induced by estrogen exposure. Knock-down of TFAP2C in the presence of estrogen altered the pattern of several known ERalpha-regulated genes and a number of genes outside the estrogen-regulated pathways. Experiment Overall Design: 6 samples were analyzed. Experiment Overall Design: 1. MCF7 cells treated with TFAP2C siRNA, without the presence of estrogen. Experiment Overall Design: 2.MCF7 cells treated with TFAP2C siRNA, with the presence of estrogen. Experiment Overall Design: 3.MCF7 cells treated with TFAP2A siRNA, without the presence of estrogen. Experiment Overall Design: 4.MCF7 cells treated with TFAP2A siRNA, with the presence of estrogen. Experiment Overall Design: 5.MCF7 cells with no siRNA treatment, without the presence of estrogen. Experiment Overall Design: 6.MCF7 cells with no siRNA treatment, with the presence of estrogen.

ORGANISM(S): Homo sapiens

SUBMITTER: Ronald Weigel 

PROVIDER: E-GEOD-8640 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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TFAP2C controls hormone response in breast cancer cells through multiple pathways of estrogen signaling.

Woodfield George W GW   Horan Annamarie D AD   Chen Yizhen Y   Weigel Ronald J RJ  

Cancer research 20070901 18

Breast cancers expressing estrogen receptor-alpha (ERalpha) are associated with a favorable biology and are more likely to respond to hormonal therapy. In addition to ERalpha, other pathways of estrogen response have been identified including ERbeta and GPR30, a membrane receptor for estrogen, and the key mechanisms regulating expression of ERs and hormone response remain controversial. Herein, we show that TFAP2C is the key regulator of hormone responsiveness in breast carcinoma cells through t  ...[more]

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