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靶向抑制COX-2基因对胃癌细胞BGC823凋亡及药物敏感性的影响 被引量:4

Effect of COX-2 gene silencing on apotosis and drug susceptibility of gastric cancer cell BGC823
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摘要 目的:研究siRNA靶向抑制环氧合酶-2(COX-2)基因后对胃癌细胞BGC823增殖、凋亡及药物敏感性的影响。方法:将COX-2 siRNA(siRNA-COX-2组)及negative control siRNA(siRNA-control组)序列转入细胞BGC823中,检测细胞增殖能力,观察多西紫杉醇(docetaxel艾素)、奥沙利铂(L-OHP)、5-氟尿嘧啶(5-FU)的药物敏感性变化,及转染前后BGC823细胞COX-2、β-catenin、Bcl-2 mRNA基因和蛋白的表达。结果:siRNA-COX-2组细胞在转染后第四天开始增殖能力下降,与siRNA-control组差异存在明显统计学意义(P<0.05),而siRNA-control组细胞于BGC823组增殖能力差异无明显统计学意义(P>0.05)。MTT法检测转染后胃癌细胞对艾素、奥沙利铂、5-氟尿嘧啶的IC50较转染前药物敏感性明显增加。流式细胞术检测转染前后胃癌细胞凋亡率为(3.08%±0.27%vs 16.14%±1.89%,P<0.05),转染后凋亡明显增加(P<0.05)。qRT-PCR法检测发现转染后COX-2、β-catenin、Bcl-2 mRNA基因的表达明显下降,Western blot检测发现,转染后48小时COX-2蛋白表达达到最低,转染后48小时β-catenin、Bcl-2蛋白表达明显下降(P<0.05)。结论:通过下调COX-2基因的表达,可有效抑制WNT信号通路的激活,同时有效降低Bcl-2基因的表达。抑制COX-2基因后可有效降低胃癌细胞BGC823的细胞增殖能力,可有效提高对艾素、奥沙利铂、5-氟尿嘧啶的药物敏感性,有效促进细胞凋亡。 Objective:To investigate the influence of cycloxyenase-2(COX-2) gene silencing on proliferation,apotosis and drug susceptibility of gastric cancer cell BGC823.Methods:COX-2 siRNA and negative control siRNA were transfected into the BGC823.Changes in cell proliferation was measured by cell counting method.The cellular sensitivity to docetaxel,oxaliplatin,5-fluorouracil was detected.Then detect the expression of COX-2,β-catenin and Bcl-2 before and after transfection.Results:The proliferation ability of siRNA-COX-2 group was decreased after 4 days post transfection.There was difference between the siRNA-COX-2 group and siRNA-control group(P〈0.05).But the siRNA-COX-2 group and siRNA-control group had no statistic significance(P〉0.05).The IC50 of gastric cancer cells cellular sensitivity to docetaxel,oxaliplatin and 5-fluorouracil were increased obviously.The drug sensitivity increased significantly after transfection.The apoptosis rate of gastric cancer cells were markedly increased after transfection(3.08%±0.27% vs 16.14%±1.89%,P〈0.05).The expression of COX-2 mRNA,β-catenin mRNA and Bcl-2 mRNA were significantly lower detected by qRT-PCR.The protein expression of COX-2 had fallen to the lowest level ever after 24 hours post transfection.The protein expression of β-catenin and Bcl-2 decreased obviously after 48 hours post transfection.Conclusion:Downregulating the expression of COX-2 gene can effectively inhibit the activation of WNT signaling pathway,and also can reduce the expression of Bcl-2 gene.Inhibition of COX-2 gene expression in gastric cancer cell line BGC823 can effectively reduce cell proliferation,migration and invasion.It also can improve the drug sensitivity of docetaxel,oxaliplatin,5-fluorouracil,promote the cell apoptosis.
出处 《现代肿瘤医学》 CAS 2016年第3期347-352,共6页 Journal of Modern Oncology
基金 国家科技部 财政部科技惠民计划(编号:2012GS620101) 甘肃省科技厅科技重大专项资助项目(编号:2010GS04390)
关键词 COX-2 WNT 增殖 凋亡 药物敏感性 COX - 2, WNT, proliferation, apoptosis, drug sensitivity
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  • 1朱风尚,陈锡美,朱国英,王志荣,王毅军,张霞.特异性环氧合酶抑制剂对胃癌细胞BGC-823生长的影响[J].同济大学学报(医学版),2005,26(1):21-25. 被引量:4
  • 2刘国红,王苏荣,王波.核因子-κB在P-糖蛋白介导卵巢癌细胞多药耐药性中的作用[J].基础医学与临床,2006,26(2):187-191. 被引量:5
  • 3朱风尚,陈锡美,王毅军,张霞,冯久贤.特异性环氧合酶抑制剂和抗癌药联用对胃癌细胞增殖的影响[J].中华肿瘤杂志,2007,29(3):186-188. 被引量:15
  • 4Patel VA, Dunn MJ, Sorokin A. Regulation of MDR - 1 ( P - glycoprorein) by cyclooxygenase-2 [J]. J Biol Chem, 2002; 277: 38915- 38920.
  • 5Sugawara I. Expression and functions of P - glycoprotein ( mdrl gene product) in normal and malignant tissues [ J]. Acta Pathol Jpn, 1990; 40 : 545 - 553.
  • 6Hirose M, Hosoi E, Hamano S, et al. Multidrug resistance in hematological malignancy [J]. J Med Invest, 2003; 50:126 - 135.
  • 7Tomonaga M, Oka M, Narasaki F, et al. The multidrug resistance - associated protein gene confers drug resistance in human gastric and colon cancers [J]. Jpn J Cancer Res, 1996; 87:1263 - 1270.
  • 8Miller B, Patel VA, Sorokin A. Cyclooxygenase-2 rescues rat me- sangial cells from apoptosis induced by adriamycin via upregula- tion of multidrug resistance protein 1 (P-glycoprotein) [ J]. J Am Soc Nephrol, 2006,17 (4) : 977 - 985.
  • 9Nardone G, Rocco A, Vaira D,et al. Expression of Cox-2, mPGE- symhase|, MDR-1 ( P-gp ) , and Bcl-xL: a molecular pathway of Hpylori-related gastric carcineyenesis [ J ]. J Pathol, 2004,202 (3) :305 -312.
  • 10Pate1 VA, Dunn M J, Sorokin A. Regulation of MDR1 ( P-glycopro- rein) by cycloxygenase-2 [ J ]. J Biol Chem, 2002, 277 (41) : 38915 - 38920.

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