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Genome wide analysis of the transcription induced by estrogen and tamoxifen in MCF-7 cells

ABSTRACT: The aim of this study is to understand the role of tamoxifen in the transcription regulation of estrogen receptor positive breast cancer cells using GRO-seq experiment. ER positive MCF-7 cells was depleted with lipid hormone in stripped culture media for 4 days, and stimulated with 17-β-estradiol (100nM), 4-OH-tamoxifen (1μM), and the combination of both for 40min. Each treatment was generated in duplicates. Then nuclei was isolated and used as the starting material for GRO-seq experiments. Sequencing data was analyzed and differential gene expression analysis was performed. A rapid induction of gene expression by 17-β-estradiol was observed as previous studies reported. While also a number of genes were also up-regulated by 4-OH-tamoxifen treatment which is considered as a ER antagnist. The data strongly indicate that as a recpressor of estrogen receptor induced transcription, tamoxifen could also perform as a partial agnist at the same time.

ORGANISM(S): Homo sapiens

PROVIDER: GSE99508 | GEO | 2017/06/30

SECONDARY ACCESSION(S): PRJNA388671

REPOSITORIES: GEO

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