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- W2136095481 abstract "Abstract With current techniques, it remains a challenge to assess coregulator binding of nuclear receptors, for example, the estrogen receptor alpha (ERα). ERα is critical in many breast tumors and is inhibited by antiestrogens such as tamoxifen in cancer therapy. ERα is also modified by acetylation and phosphorylation that affect responses to the antiestrogens as well as interactions with coregulators. Phosphorylation of ERα at Ser305 is one of the mechanisms causing tamoxifen resistance. Detection of resistance in patient samples would greatly facilitate clinical decisions on treatment, in which such patients would receive other treatments such as aromatase inhibitors or fulvestrant. Here we describe a coregulator peptide array that can be used for high-throughput analysis of full-length estrogen receptor binding. The peptide chip can detect ERα binding in cell and tumor lysates. We show that ERα phosphorylated at Ser305 associates stronger to various coregulator peptides on the chip. This implies that ERαSer305 phosphorylation increases estrogen receptor function. As this is also detected in a breast tumor sample of a tamoxifen-insensitive patient, the peptide array, as described here, may be applicable to detect tamoxifen resistance in breast tumor samples at an early stage of disease and contribute to personalized medicine. Mol Cancer Ther; 11(4); 805–16. ©2012 AACR." @default.
- W2136095481 created "2016-06-24" @default.
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- W2136095481 date "2012-04-01" @default.
- W2136095481 modified "2023-10-17" @default.
- W2136095481 title "Serine-305 Phosphorylation Modulates Estrogen Receptor Alpha Binding to a Coregulator Peptide Array, with Potential Application in Predicting Responses to Tamoxifen" @default.
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- W2136095481 doi "https://doi.org/10.1158/1535-7163.mct-11-0855" @default.
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