E6AP Mediates Regulated Proteasomal Degradation of the Nuclear Receptor Coactivator Amplified in Breast Cancer 1 in Immortalized Cells

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E6AP mediates regulated proteasomal degradation of the nuclear receptor coactivator amplified in breast cancer 1 in immortalized cells.

The steroid receptor coactivator oncogene, amplified in breast cancer 1 (AIB1; also known as ACTR/RAC-3/TRAM-1/SRC-3/p/CIP), is amplified and overexpressed in a variety of epithelial tumors. AIB1 has been reported to have roles in both steroid-dependent and steroid-independent transcription during tumor progression. In this report, we describe that the cellular levels of AIB1 are controlled thr...

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Overexpression of the oncogene amplified in breast cancer 1 (AIB1)/steroid receptor coactivator-3 (SRC-3) induces mammary tumorigenesis in mice. In breast cancer, high levels of AIB1/SRC-3 and the growth factor receptor HER2/neu predict resistance to endocrine therapy and poor outcome. However, a mechanistic relationship between AIB1/SRC-3 and HER2/neu in the development of breast cancer has no...

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The steroid receptor coactivator amplified in breast cancer 1 (AIB1) as well as epidermal growth factor receptor (EGFR) family members are frequently overexpressed in epithelial tumors, and their expression is associated with poor prognosis. However, a direct role of AIB1 in EGF signaling has not been determined. To address this, we reduced endogenous AIB1 levels using RNA interference in lung,...

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ژورنال

عنوان ژورنال: Cancer Research

سال: 2006

ISSN: 0008-5472,1538-7445

DOI: 10.1158/0008-5472.can-06-0557