標題: Histone Demethylase RBP2 Promotes Lung Tumorigenesis and Cancer Metastasis
作者: Teng, Yu-Ching
Lee, Cheng-Feng
Li, Ying-Shiuan
Chen, Yi-Ren
Hsiao, Pei-Wen
Chan, Meng-Yu
Lin, Feng-Mao
Huang, Hsien-Da
Chen, Yen-Ting
Jeng, Yung-Ming
Hsu, Chih-Hung
Yan, Qin
Tsai, Ming-Daw
Juan, Li-Jung
生物資訊及系統生物研究所
Institude of Bioinformatics and Systems Biology
公開日期: 1-Aug-2013
摘要: The retinoblastoma binding protein RBP2 (KDM5A) is a histone demethylase that promotes gastric cancer cell growth and is enriched in drug-resistant lung cancer cells. In tumor-prone mice lacking the tumor suppressor gene RB or MEN1, genetic ablation of RBP2 can suppress tumor initiation, but the pathogenic breadth and mechanistic aspects of this effect relative to human tumors have not been defined. Here, we approached this question in the context of lung cancer. RBP2 was overexpressed in human lung cancer tissues where its depletion impaired cell proliferation, motility, migration, invasion, and metastasis. RBP2 oncogenicity relied on its demethylase and DNA-binding activities. RBP2 upregulated expression of cyclins D1 and E1 while suppressing the expression of cyclin-dependent kinase inhibitor p27 (CDKN1B), each contributing to RBP2-mediated cell proliferation. Expression microarray analyses revealed that RBP2 promoted expression of integrin-beta 1 (ITGB1), which is implicated in lung cancer metastasis. Mechanistic investigations established that RBP2 bound directly to the p27, cyclin D1, and ITGB1 promoters and that exogenous expression of cyclin D1, cyclin E1, or ITGB1 was sufficient to rescue proliferation or migration/invasion, respectively. Taken together, our results establish an oncogenic role for RBP2 in lung tumorigenesis and progression and uncover novel RBP2 targets mediating this role. (C)2013 AACR.
URI: http://dx.doi.org/10.1158/0008-5472.CAN-12-3165
http://hdl.handle.net/11536/22594
ISSN: 0008-5472
DOI: 10.1158/0008-5472.CAN-12-3165
期刊: CANCER RESEARCH
Volume: 73
Issue: 15
起始頁: 4711
結束頁: 4721
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