Role of estrogen receptor variants in the development of hormone resistance in breast cancer.

Abstract excerpt

Recent evidence suggests that the progression to hormone resistance in some breast tumors is due to mutations in the estrogen receptor (ER). Various types of ER variants have been found in breast cancer biopsies and breast cancer cell lines. The ER variants include dominant-positive receptors that are transcriptionally active in the absence of estrogen, and dominant-negative receptors that are themselves...

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