Removal of BRCA1/CtIP/ZBRK1 repressor complex on ANG1 promoter leads to accelerated mammary tumor growth contributed by prominent vasculature

被引：98

作者：

Furuta, Saori ^{[1
]}

Wang, Ju-Ming ^{[1
]}

Wei, Shuanzeng ^{[1
]}

Jeng, Yung-Ming ^{[1
]}

Jiang, Xianzhi ^{[1
]}

Gu, Bingnan ^{[1
]}

Chen, Phang-Lang ^{[1
]}

Lee, Eva Y. -H. P. ^{[1
]}

Lee, Wen-Hwa ^{[1
]}

机构：

[1] Univ Calif Irvine, Coll Med, Dept Biol Chem, Irvine, CA 92697 USA

来源：

CANCER CELL | 2006年 / 10卷 / 01期

关键词：

D O I：

10.1016/j.ccr.2006.05.022

中图分类号：

R73 [肿瘤学];

学科分类号：

100214 ;

摘要：

BRCA1 exerts transcriptional repression through interaction with CUP in the C-terminal BRCT domain and ZBRK1 in the central domain. A dozen genes, including angiopoietin-1 (ANG1), a secreted angiogenic factor, are corepressed by BRCA1 and CUP based on microarray analysis of mammary epithelial cells in 3D culture. BRCA1, CUP, and ZBRK1 form a complex that coordinately represses ANG1 expression via a ZBRK1 recognition site in the ANG1 promoter. Impairment of this complex upregulates ANG1, which stabilizes endothelial cells that form a capillary-like network structure. Consistently, Brca1-deficient mouse mammary tumors exhibit accelerated growth, pronounced vascularization, and overexpressed ANG1. These results suggest that, besides its role in maintaining genomic stability, BRCA1 directly regulates the expression of angiogenic factors to modulate the tumor microenvironment.

引用

页码：13 / 24

页数：12

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