首都医科大学学报 ›› 2011, Vol. 32 ›› Issue (3): 384-387.

• 基础研究 • 上一篇    下一篇

尼美舒利、阿司匹林对COX-2不同表达水平的食管鳞癌细胞株的抑制作用

周巧直1,孟欣颖2,朱圣韬1,张澍田1   

  1. 1. 首都医科大学附属北京友谊医院消化内科,北京市消化疾病中心,首都医科大学消化病学系,北京 100050;2. 青岛市市立医院(东区)消化内科,青岛 266071
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-06-21 发布日期:2011-06-21

The inhibitory effect of nimesulide and aspirin on esophageal squamous cell carcinoma cell lines with or without cyclooxygenase-2 expression

ZHOU Qiao-zhi1, MENG Xin-ying2, ZHU Sheng-tao1, ZHANG Shu-tian1   

  1. 1. Department of Digestive Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China;2. Department of Digestive Diseases, Qingdao Municipal Hospital, Shandong Province, Qingdao 266071, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-06-21 Published:2011-06-21

摘要:

目的 比较选择性和非选择性环氧合酶-2(cyclooxygenase-2,COX-2)抑制剂对不同COX-2表达水平的食管鳞癌细胞的抑制作用。
方法 选取食管鳞癌细胞株EC109和TE-1,采用Western blotting法测定COX-2蛋白表达、MTT法检测细胞增生以及流式细胞术检测细胞周期和细胞凋亡(PI标记),观察阿司匹林及尼美舒利对2株细胞增生、凋亡的作用。
结果 Western blotting结果显示,EC109细胞表达COX-2,TE-1细胞不表达COX-2。选择性COX-2抑制剂尼美舒利可抑制EC109细胞的增生,抑制率为(17.5±3.3)%~(80.1±3.9)%。尼美舒利仅在0.4 mmol/L时对TE-1细胞有抑制作用,抑制率为(16.2±7.0)%。尼美舒利可使EC109细胞的细胞周期阻滞于G0/G1期,并诱导细胞凋亡,但对TE-1细胞无上述作用。非选择性COX-2抑制剂阿司匹林在0~4 mmol/L浓度区间对EC109和TE-1均有抑制作用,并呈剂量依赖关系。阿司匹林作用后,EC109与TE-1的细胞周期均被阻滞于G0/G1期,细胞凋亡率分别为(10.55±0.01)%及(8.52±6.65)%。
结论 食管鳞癌(esophageal squamous cell carcinoma,ESCC)细胞株中COX-2的表达水平影响了选择性COX-2抑制剂的抑制作用,而对非选择性COX-2抑制剂影响较小。阿司匹林可能通过非COX-2依赖途径从而发挥对肿瘤的抑制作用。

关键词: 环氧合酶-2, 食管鳞癌, 增生, 凋亡

Abstract:

Objective To investigate the inhibitory effect of nimesulide and aspirin on esophageal squamous cell carcinoma(ESCC) cell lines with or without cyclooxygenase-2 expression.
Methods The human ESCC cell lines EC109 and TE-1 were used in this study. Cox-2 expression was detected by Western blotting. After 72 hours treatment with nimesulide and aspirin, the cell growth inhibition was determined by MTT assay, the cell cycle arrest and apoptosis detected by flow cytometry.
Results Cox-2 protein expression was observed in EC109, but not in TE-1. Nimesulide suppressed proliferation of EC109 from 0.05 mmol/L to 0.4 mmol/L in a dose-dependent manner, while only 0.4 mmol/L nimesulide showed this effect in TE-1. Nimesulide exerted cell cycle arrest in the G0/G1 phase with induction of apoptosis, but had no effect on TE-1. Aspirin suppressed proliferation of EC109 as well as TE-1 in a dose-dependent manner and promoted apoptosis in both cell lines.
Conclusion The inhibitory effect on ESCC cell lines may be influenced by COX-2 expression for nimesulide, but not for aspirin. Non-selective COX-2 inhibitor may exert inhibitory effect on tumor proliferation via COX-2 independent pathway.

Key words: cyclooxygenase-2, esophageal squamous cell carcinoma, proliferation, apoptosis

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