Berberine Inhibits Proliferation and Down-Regulates Epidermal Growth Factor Receptor through Activation of Cbl in Colon Tumor Cells

被引:62
作者
Wang, Lihong [1 ,2 ]
Cao, Hailong [2 ,3 ]
Lu, Ning [2 ,4 ]
Liu, Liping [2 ]
Wang, Bangmao [3 ]
Hu, Tianhui [1 ]
Israel, Dawn A. [5 ]
Peek, Richard M., Jr. [5 ,6 ]
Polk, D. Brent [7 ,8 ,9 ]
Yan, Fang [2 ,4 ]
机构
[1] Xiamen Univ, Coll Med, Ctr Canc, Xiamen, Peoples R China
[2] Vanderbilt Univ, Med Ctr, Div Gastroenterol Hepatol & Nutr, Dept Pediat, Nashville, TN 37235 USA
[3] Tianjin Med Univ, Gen Hosp, Dept Med, Tianjin, Peoples R China
[4] Tianjin Med Univ, Canc Inst & Hosp, Dept Breast Canc Med Oncol, Key Lab Breast Canc Prevent & Therapy, Tianjin, Peoples R China
[5] Vanderbilt Univ, Med Ctr, Dept Med, Nashville, TN USA
[6] Vanderbilt Univ, Med Ctr, Dept Canc Biol, Nashville, TN USA
[7] Univ So Calif, Dept Pediat, Los Angeles, CA 90089 USA
[8] Univ So Calif, Dept Biochem & Mol Biol, Los Angeles, CA USA
[9] Childrens Hosp Los Angeles, Saban Res Inst, Los Angeles, CA 90027 USA
来源
PLOS ONE | 2013年 / 8卷 / 02期
基金
美国国家卫生研究院;
关键词
CANCER-CELLS; COLORECTAL-CANCER; GENOTOXIC STRESS; EGF RECEPTOR; APOPTOSIS; PATHWAYS; MECHANISM; ADENOMAS; ARREST; DEATH;
D O I
10.1371/journal.pone.0056666
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Berberine, an isoquinoline alkaloid, is an active component of Ranunculaceae and Papaveraceae plant families. Berberine has been found to suppress growth of several tumor cell lines in vitro through the cell-type-dependent mechanism. Expression and activation of epidermal growth factor receptor (EGFR) is increased in colonic precancerous lesions and tumours, thus EGFR is considered a tumour promoter. The aim of this study was to investigate the effects and mechanisms of berberine on regulation of EGFR activity and proliferation in colonic tumor cell lines and in vivo. We reported that berberine significantly inhibited basal level and EGF-stimulated EGFR activation and proliferation in the immorto Min mouse colonic epithelial (IMCE) cells carrying the APC(min) mutation and human colonic carcinoma cell line, HT-29 cells. Berberine acted to inhibit proliferation through inducing G1/S and G2/M cell cycle arrest, which correlated with regulation of the checkpoint protein expression. In this study, we also showed that berberine stimulated ubiquitin ligase Cbl activation and Cbl's interaction with EGFR, and EGFR ubiquitinylation and down-regulation in these two cell lines in the presence or absence of EGF treatment. Knock-down Cbl expression blocked the effects of berberine on down-regulation of EGFR and inhibition of proliferation. Furthermore, berberine suppressed tumor growth in the HT-29 cell xenograft model. Cell proliferation and EGFR expression level was decreased by berberine treatment in this xenograft model and in colon epithelial cells of APC(min/+) mice. Taken together, these data indicate that berberine enhances Cbl activity, resulting in downregulation of EGFR expression and inhibition of proliferation in colon tumor cells.
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页数:9
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