Anticancer effect and apoptosis induction of gambogic acid in human gastric cancer line BGC-823

被引:110
作者
Liu, Wei [1 ]
Guo, Qing-Long [1 ]
You, Qi-Dong [2 ]
Zhao, Li [1 ]
Gu, Hong-Yan [1 ]
Yuan, Sheng-Tao [3 ]
机构
[1] China Pharmaceut Univ, Dept Physiol, Nanjing 210009, Jiangsu Provinc, Peoples R China
[2] China Pharmaceut Univ, Dept Med Chem, Nanjing 210009, Jiangsu Provinc, Peoples R China
[3] China Pharmaceut Univ, Natl Lab New Drug Screen, Nanjing 210009, Jiangsu Provinc, Peoples R China
关键词
Gambogic acid; Apoptosis; bcl-2; bax;
D O I
10.3748/wjg.v11.i24.3655
中图分类号
R57 [消化系及腹部疾病];
学科分类号
摘要
AIM: To investigate the anticancer effect of a traditional Chinese medicine gambogic acid (GA) in human gastric cancer line BGC-823 and further study the mechanism of apoptosis induction of GA. METHODS: Low differential human gastric cancer line BGC-823 were treated with GA at different doses and different times, the inhibitory rates were detected by MTT assay. Apoptosis induced by GA in BGC-823 cells was observed by Annexin-V/PI doubling staining flow cytometry assay. And T/C (%) was chosen to detect the inhibition of GA on human gastric adenocarcinoma BGC-823 nude mice xenografts. Apoptosis on nude mice xenografts was observed by Annexin-V/PI doubling staining flow cytometry assay and DNA fragmentation assay. To further determine the molecular mechanism of apoptosis induced by GA, the changes on the expression of bcl-2 and bax genes were detected by RT-PCR. RESULTS: After incubation with GA, low differential human gastric cancer line BGC-823 was dramatically inhibited in a dose-dependent manner. After these cells were exposed to GA for 24, 48 and 72 h, the IC50 value was 1.02 +/- 0.05, 1.41 +/- 0.20 and 1.14 +/- 0.19 mu mol/L, respectively. Apoptosis in BGC-823 cells induced by GA was observed by AnnexinV/PI doubling staining flow cytometry assay. The apoptotic population of BGC-823 cells was about 12.96% and 24.58%, respectively, when cells were incubated with 1.2 mu mol/L GA for 48 and 72 h. T/C (%) of human gastric carcinoma adenocarcinoma BGC-823 nude mice xenografts was 44.3, when the nude mice were treated with GA (8 mg/kg). Meanwhile, apoptosis induced by GA was observed in human gastric carcinoma adenocarcinoma BGC-823 nude mice xenografts. The increase of bax gene and the decrease of bc1-2 gene expressions were found by RT-PCR. CONCLUSION: The inhibition of GA on human gastric cancer line BGC-823 was confirmed. This effect connects with the inducing apoptosis in BGC-823 cells and the molecular mechanism might be related to the reduction of expression of apoptosis-regulated gene bcl-2, and the improvement of the expression of apoptosis-regulated gene bax. The result was also confirmed in vivo. (C) 2005 The WJG Press and Elsevier Inc. All rights reserved.
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收藏
页码:3655 / 3659
页数:5
相关论文
共 23 条
[21]   APOPTOSIS (THE 1992 ROSE,FRANK MEMORIAL LECTURE) [J].
WYLLIE, AH .
BRITISH JOURNAL OF CANCER, 1993, 67 (02) :205-208
[22]  
Yamaguchi H, 2003, CANCER RES, V63, P1483
[23]  
Zhang YH, 2004, ACTA PHARMACOL SIN, V25, P937