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Homo sapiens

ABSTRACT: HoxC11 ChIP-seq of LY2 Breast Cancer Cell Line

PROVIDER: PRJNA234387 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR1107305.fastq.gz	Fastqsanger.gz
	SRR1107306.fastq.gz	Fastqsanger.gz
	SRR1107307.fastq.gz	Fastqsanger.gz

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HoxC11 ChIP-seq of LY2 Breast Cancer Cell Line

Project description:SRC-1 (NCOA1) is a steroid receptor coactivator that has been associated with various aspects of the progression of breast cancer disease such as tamoxifen resistance, metastasis, cell proliferation and invasiveness. In a tamoxifen resistant breast cancer cell line (LY2), SRC-1 has been found to interact with the developmental transcription factor HoxC11. ChIP-sequencing of HoxC11 in LY2 cells shows where the transcription factor binds throughout the genome. LY2 cells were treated with either tamoxifen or vehicle and immunoprecipitated with anti-Hoxc11

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HoxC11 ChIP-seq of LY2 Breast Cancer Cell Line

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SRC-1 targets ADAM22: an ER-independent mechanism of tumour progression in endocrine resistance

Project description:We profile the binding of Steroid Receptor Co-activator (SRC1) in LY2 cells, a tamoxifen-resistant cell line, in the presence and absence of tamoxifen using ChIP-sequencing technology. The development of breast cancer resistance to endocrine therapy results from an increase in cellular plasticity leading to the development of a steroid-independent tumour. The p160 steroid coactivataor protein SRC-1, through interactions with developmental proteins and other non-steroidal transcription factors, drives this tumour adaptability. Here, using discovery studies, we identify ADAM22, a non-protease member of the ADAMs family, as a direct, ER-independent target of SRC-1. Molecular, cellular and in vivo studies confirmed SRC-1 as a regulator of ADAM22. At a functional level, a role for ADAM22 in cellular migration and differentiation was observed. In vivo data from a mouse xenograft model indicated that ADAM22 expression was higher in 4-OHT-treated endocrine-resistant tumours than in tumours derived from isogenic, sensitive cells. Furthermore, in breast cancer patients, ADAM22 expression is an independent predictor of poor disease free survival. SRC-1 can function as a molecular switch which converts a steroid-responsive tumour to a steroid-resistant tumour. The ER-independent SRC-1 target ADAM22 is a potential drug target and a companion predictive biomarker in the treatment of endocrine-resistant breast cancer. Examination of SRC-1 binding in LY2 cells in the presence or absence of tamoxifen treatment. 2 replicates each.

2011-11-01 | E-GEOD-28987 | biostudies-arrayexpress

Identification of p63 binding regions in a p63 expressing basal-subtype breast cancer cell line, MCFDCIS.

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