中国癌症杂志 ›› 2013, Vol. 23 ›› Issue (12): 974-979.doi: 10.3969/j.issn.1007-3969.2013.12.007

• 论著 • 上一篇    下一篇

Aurora-A促进胰腺癌细胞放射抵抗的机制研究

孙会贞,杨恭   

  1. 复旦大学附属肿瘤医院实验研究中心,复旦大学上海医学院肿瘤学系,上海200032
  • 出版日期:2013-12-30 发布日期:2014-02-17
  • 通信作者: 杨恭 E-mail:yanggong@fudan.edu.cn
  • 基金资助:
    浦江人才计划基金(No:PJ[2011]0000652)

Mechanistic study of pancreatic cancer cell radioresistance conferred by Aurora-A

SUN Hui-zhen,YANG Gong   

  1. Cancer Research Laboratory, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
  • Published:2013-12-30 Online:2014-02-17
  • Contact: YANG Gong E-mail: yanggong@fudan.edu.cn

摘要: 背景与目的:Aurora-A属于丝氨酸和苏氨酸蛋白激酶家族,其异常表达可导致肿瘤发生及其对放射线的抵抗,本研究旨在探讨Aurora-A与细胞放射敏感的相关性。方法:用Aurora-A激酶抑制剂处理Capan-1细胞,检测细胞增殖、锚定非依赖性生长和细胞周期及其周期相关蛋白的变化;处理的细胞同时用γ线照射,然后用流式细胞术检测细胞凋亡。结果:Aurora-A激酶抑制剂处理后,Capan-1细胞生长速度减慢,克隆形成率降低;Aurora-A抑制可引起细胞周期G1/S以及G2/M期转化阻滞,Cyclin D1、CDK2和CDK6表达下降。Aurora-A激酶抑制剂处理后可以提高放射线照射诱导的细胞凋亡率。结论:Aurora-A激酶抑制剂可抑制胰腺癌细胞增殖,阻滞细胞周期,促进细胞对放射线照射的敏感性。因此,Aurora-A可能是胰腺癌放射治疗增敏的靶向分子之一。

关键词: Aurora-A, 胰腺癌, 放射敏感性

Abstract: Background and purpose: Aurora-A is a member of serine/threonine kinase family. The abnormal expression of Aurora-A induces tumorigenesis and radioresistance. This study was aimed to investigate the association of Aurora-A with radioresistance. Methods: Capan-1 cells were treated with Aurora-A kinase inhibitor, and then used to test cell proliferation, anchorage independent assay, cell cycle, and cell cycle regulatory proteins. Treated cells were also used to detect cell apoptosis after γ-irradiation. Results: Cell growth and colony number in soft agar were decreased after treatment with Aurora-A inhibitor. Treatment of cells with Aurora-A inhibitor also down-regulated the expression of Cyclin D1, CDK2 and CDK6 to induce cell cycle arrest at G1/S and G2/M phases, but promoted cell apoptosis after γ-irradiation. Conclusion: Treatment of pancreatic cancer cells with Aurora-A kinase inhibitor blocks cell proliferation and cell cycle progression, and promotes sensitivity of cells to radiation. Thus, Aurora-A may be used as one of therapeutic targets to increase the sensitivity of pancreatic cancer radiotherapy.

Key words: Aurora-A, Pancreatic cancer, Radiosensitivity