上海交通大学学报（医学版）

上海交通大学学报（医学版）

• 论著（基础研究） • 上一篇    下一篇

X射线对胰腺癌细胞株SW1990和Capan-2细胞增殖及凋亡的影响

刘小兴，侯艳丽，马秀梅，谢华英，曹鸿斌，白永瑞   

  1. 上海交通大学 医学院附属仁济医院放射诊疗科， 上海 200127
  • 出版日期:2013-11-28 发布日期:2013-12-03
  • 通讯作者: 白永瑞, 电子信箱: baiyongruiz@163.com。
  • 作者简介:刘小兴（1986—）， 女， 技师， 硕士; 电子信箱: xiaoxingliu2012@163.com。
  • 基金资助:

    上海市科委课题（114119a7400）

Effects of X-ray on cell proliferation and apoptosis of human pancreatic cancer cell lines SW1990 and Capan-2

LIU Xiao-xing, HOU Yan-li, MA Xiu-mei, Xie Hua-ying, CAO Hong-bin, BAI Yong-rui   

  1. Department of Radiation Oncology, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
  • Online:2013-11-28 Published:2013-12-03
  • Supported by:

    Foundation of Science and Technology Commission of Shanghai Municipality, 114119a7400

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摘要：

目的 探究不同剂量的X射线对胰腺癌细胞株SW1990和Capan-2增殖和凋亡的影响。方法 取处于对数生长期的SW1990和Capan-2细胞，经不同剂量的X射线（2、4、6、8和10 Gy）照射后分别培养24、48和72 h。CCK-8法检测细胞增殖；采用Annexin V/PI双染的方法检测SW1990和Capan-2细胞的凋亡；Western blotting检测细胞凋亡相关蛋白的表达变化；RT-PCR检测细胞凋亡相关蛋白的mRNA表达。结果 相比正常对照组，X射线能明显抑制SW1990和Capan-2细胞的增殖，并且这种抑制作用呈剂量依赖性。细胞凋亡率在X射线的作用下也明显增加，并呈现剂量依赖性。Western blotting结果显示X射线能增加两种细胞中促凋亡蛋白Bax的表达。RT-PCR结果显示X射线能降低抗凋亡蛋白Bcl-2 mRNA表达，上凋抗凋亡蛋白Bax mRNA表达。结论 X射线能抑制胰腺癌细胞株SW1990和Capan-2的增殖并提高其凋亡率，呈现一定的剂量依赖性，其机制可能与诱导胰腺癌细胞凋亡有关。

关键词: 胰腺癌, X射线, 增殖, 凋亡

Abstract:

Objective To explore the effects of X-ray irradiation on cell proliferation and apoptosis of human pancreatic cancer cell lines SW1990 and Capan-2. Methods SW1990 and Capan-2 cells were obtained at logarithmic growth phase and then irradiated by X-ray at different dosage (2, 4, 6, 8, and 10 Gy) for 24, 48, and 72 h. The inhibition rates were detected by CCK-8 assay. Apoptosis rates of SW1990 and Capan-2 cells were determined by flow cytometry with Annexin V/PI double staining. Apoptosis related proteins and mRNA expressions were detected by using Western blotting and RT-PCR. Results Compared to control group, the inhibition rates of SW1990 and Capan-2 cells were significantly higher in X-ray irradiated group (P<0.05), and the inhibition was in a dose-dependent manner. The apoptosis rates of SW1990 and Capan-2 were significantly increased with a dose-dependent manner under X-ray irradiation. Western blotting results indicated that expressions of Bax, a pro-apoptotic protein, increased with irradiation of X-ray. And RT-PCR results indicated that mRNA of Bcl-2, an anti-apoptotic protein, decreased while mRNA of Bax increased under X-ray irradiation. Conclusion X-ray irradiation has significant inhibitive effect on pancreatic cancer cell lines, SW1990 and Capan-2, in a dose- and time-dependent manner, which may be related with pancreatic cancer cells apoptosis.

Key words: pancreatic cancer, X-ray, proliferation, apoptosis