›› 2011, Vol. 23 ›› Issue (2): 111-113.doi: 10.3969/j.issn.1004-616x.2011.02.007

• 论著 • 上一篇    下一篇

人COX-2基因反义真核表达载体对胃癌转移的影响

马 丹1,刘 敏2,王爱平3 ,杨 桦1﹡   

  1. 1. 第三军医大学附属新桥医院普通外科,重庆 400037; 2. 第三军医大学附属新桥医院神经外科, 重庆 400037; 3. 中国医学科学院药物研究所, 北京 100050
  • 收稿日期:2010-07-13 修回日期:2010-12-17 出版日期:2011-03-30 发布日期:2011-03-30
  • 通讯作者: 杨 桦

Effect of COX-2 gene antisense eukaryotic expression vector on SGC-7901 metastasis

MA Dan1, LIU Min2, WANG Ai-ping3, YANG Hua1,*   

  1. 1.Department of General Surgery, the Second Affiliated Hospital of the Third Military Medical University, Chongqing 400037; 2. Department of Neurosurgery, the Second Affiliated Hospital of the Third Military Medical University, Chongqing 400037; 3. Institute of Material Medica, Chinese Academy of Medical Sciences, Beijing 100050, China
  • Received:2010-07-13 Revised:2010-12-17 Online:2011-03-30 Published:2011-03-30
  • Contact: YANG Hua

摘要: 在成功构建人COX-2基因反义真核表达载体的基础上,研究COX-2基因对人胃癌细胞株SGC-7901转移能力的影响。 方法: 实验分为COX-2基因反义真核表达载体转染的人胃癌细胞株SGC-7901转染组、COX-2抑制剂SC236处理组(SGC-7901细胞培养基内含100 μmol/L SC236)和对照组(SGC-7901细胞),并分别采用细胞体外侵袭实验,内皮细胞体外迁移实验,观察各组细胞体外转移的情况。采用裸鼠皮下移植瘤抑制实验,用转染和未转染的SGC-7901细胞按每毫升5×107个的细胞悬液分别注射于BALB/ C-nu/ nu无胸腺裸鼠背部皮下,SC236处理组按3 mg/(kg·d)剂量于接种SGC-7901细胞10 min后,由尾静脉注射,隔日1次。各组6周后处死动物,观察皮下移植瘤的生长情况。并用Western blot 法检测各组细胞VEGF 及 MMP-2 蛋白的表达。 结果: 体外侵袭实验、促内皮细胞体外迁移实验结果显示,与对照组相比,转染组和SC236处理组迁移的肿瘤细胞和内皮细胞均减少(P<0.01);裸鼠皮下移植抑制实验结果显示,转染组和SC236处理组荷瘤鼠移植瘤的生长受到抑制;Western blot结果显示,转染组和SC236处理组细胞VEGF及 MMP-2 蛋白的表达下降。 结论: 反义COX-2基因能抑制SCG-7901细胞的转移能力,其机制可能与其抑制肿瘤的血管生成、减少 MMP-2 的表达有关。

关键词: 环氧合酶, 反义技术, 重组载体, 转移

Abstract: Use constructed antisense expression vector of human COX-2 gene and observe the relationship between COX-2 gene and tumor metastasis. METHODS: Gastric cancer cell line SCG-7901 was transfected with antisense expression vector of human COX-2 gene. Three groups of cells which included transfectant、SC236 treated group(SCG-7901 treated with COX-2 inhibitor SC236 at 100 μmol/L) and SCG-7901 as a control group. Changes of the invasion ability in each group were observed in vitro. Western blot was used to detect VEGF and MMP-2 expressions in the 3 groups. Then the transfectant and SCG-7901 were injected subcutaneously into BALB/C-nu/nu nude mice to develop transplantation tumor,another group of mice received SCG-7901 treated with SC236 injected subcutaneously. The sizes and the weights of the lesions were observed. RESULTS:The results of transwell membrane、 cell migration and the growth of transplanted tumors showed that after transfection the invasion ability of SCG-7901 was obviously inhibited, the expressions of VEGF and MMP-2 in the cell line decreased. CONCLUSION: Transfection with antisense expression vector of human COX-2 gene had obvious antitumor activity on metastasis of human gastric cancer cell line in nude mice. The mechanism may be via inhibition of angiogenesis and down-regulation of MMP-2 expression.

Key words: cyclooxygenase, antisense technology, recombinant vector, metastasis