Transcription profiling of human estrogen receptor positive MCF7 cells stably transfected with aromatase gene treated with testosterone, 17 B-estradiol, two aromatase inhibitors (letrozole and anastrozole), and an anti-estrogen (tamoxifen)

ABSTRACT: Anti-estrogens and aromatase inhibitors are important drugs in the treatment of estrogen-dependent breast cancer. In order to investigate the effects of these drugs on gene expression in breast cancer cells, we treated estrogen receptor-positive MCF-7 cells, stably transfected with the aromatase gene (known as MCF-7aro cells), with testosterone, 17β-estradiol, two aromatase inhibitors (letrozole and anastrozole), and an anti-estrogen (tamoxifen). Microarray analyses using Affymetrix Human Genome U133A GeneChips were carried out using total RNA isolated from the control and treated cells. When comparing the effect of each inhibitor on gene expression we observe that letrozole and anastrozole are more similar in terms of the genes they affect, compared to treatment with tamoxifen. The re

ORGANISM(S): Homo sapiens

SUBMITTER: Itoh T 

PROVIDER: S-ECPF-GEOD-2225 | biostudies-other | 2005 Apr

REPOSITORIES: biostudies-other