Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Gene expression profiles of MCF7 with with the following NR ligands: estradiol/E2 (ERÎ± agonist), AM580 (RARA agonist), CD437 (RARG agonist), ATRA (RARA/RARG agonist), GW0742 (PPARD agonist), R5020 (PGR agonist), and dexamethasone (GR/NR3C1 agonist).

ABSTRACT: Altered gene expression patterns in human diseases reflect perturbations in the transcriptional networks that regulate cellular state. In breast cancer, Nuclear Receptors (NRs) play a prominent role in governing gene expression. NRs have prognostic utility and are therapeutically important targets. In order to understand the function of nuclear receptors in breast cancer, we treated MCF7 cells with 6 nuclear receptor agonist, and performed expression arrrays with three biological replicates each. MCF-7 cells were cultured for 48 hours in medium with 10% charcoal-stripped FBS, and then were treated with 6 diffferent NR ligand (E2, AM580, CD437, ATRA, R5020, DEX) separately for 24h before collection and processing for microarrays. Three biological replicates were collected and processed for both control and treatment. with the 100nM GW0742 (PPARD specific ligand) and 100nM ATRA (RARs ligand), then collected after 24h for microarray processing. Controls were non-treated MCF7 cells. Both treatments and controls have three biological replicates.

ORGANISM(S): Homo sapiens

SUBMITTER: Jie Zhou

PROVIDER: E-GEOD-42619 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

A comprehensive nuclear receptor network for breast cancer cells.

Kittler Ralf R Zhou Jie J Hua Sujun S Ma Lijia L Liu Yuwen Y Pendleton Elisha E Cheng Chao C Gerstein Mark M White Kevin P KP

Cell reports 20130131 2

In breast cancer, nuclear receptors (NRs) play a prominent role in governing gene expression, have prognostic utility, and are therapeutic targets. We built a regulatory map for 24 NRs, six chromatin state markers, and 14 breast-cancer-associated transcription factors (TFs) that are expressed in the breast cancer cell line MCF-7. The resulting network reveals a highly interconnected regulatory matrix where extensive crosstalk occurs among NRs and other breast -cancer-associated TFs. We show that ...[more]

PMID: 23375374

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Project description:We defined the RARα interactome in the MDA-MB453 breast cancer cell line genetically engineered to over-express an N-terminally tagged version of the nuclear retinoic acid receptor. Twenty eight nuclear proteins which interact with RARα and whose interaction is stimulated or reduced by the pan-RAR ligand, all-trans retinoic acid (ATRA) were identified. Given the potential significance of the S100A3 calcium-binding protein in the control of tumor progression, we focused our attention on this factor. Using the two models represented by the ATRA-sensitive SKBR3 and MCF7 breast cancer cell lines characterized by constitutive expression of S100A3 and RARα, we demonstrate that the endogenous forms of S100A3 and RARα interact in physiological conditions. The interaction of S100A3 with RARα is cell context independent and it is observed not only in breast cancer but also in acute promyelocytioc leukemia (APL) cells, characterized by expression of the RARα-derived PML-RARα oncogene, which is the product of the t(15:17) chromosomal translocation. S100A3 interacts directly and specifically with RARα and PML-RARα, being unable to bind other members of the RAR/RXR family of retinoid nuclear receptors. The interaction surface maps to the carboxyl-terminal region of the RARα ligand binding domain. Binding of S100A3 to RARα and PML-RARα controls the constitutive and ATRA-dependent degradation of the two receptors. Silencing of the S100A3 gene decreases the amounts of RARα in breast SK-BR-3 and lung A549 cancer cells, rendering them more refractory to the anti-proliferative action of ATRA. In SK-BR-3 cells, this effect is accompanied by a decrease in the lactogenic/differentiating action of ATRA. In APL-derived NB4 cells, S100A3 knock-down reduces the amounts of both RARα and PML-RARα. Contemporaneous down-regulation of the two receptors is associated with an increase in the basal and ATRA-induced expression of many granulocytic differentiation markers. Opposite on RARα and PML-RARα levels as well as ATRA induced differentiation markers are observed upon over-expression of S100A3 in NB4 cells.

Dataset Information

Gene expression profiles of MCF7 with with the following NR ligands: estradiol/E2 (ERÎ± agonist), AM580 (RARA agonist), CD437 (RARG agonist), ATRA (RARA/RARG agonist), GW0742 (PPARD agonist), R5020 (PGR agonist), and dexamethasone (GR/NR3C1 agonist).

Publications

A comprehensive nuclear receptor network for breast cancer cells.

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