基础医学与临床 ›› 2013, Vol. 33 ›› Issue (10): 1235-1241.

• 研究论文 • 上一篇    下一篇

rHSG基因调控COPD大鼠气道成纤维细胞增殖凋亡

葛正行,李波,周洵,李常   

  1. 贵阳中医学院第二附属医院
  • 收稿日期:2012-11-19 修回日期:2013-03-27 出版日期:2013-10-05 发布日期:2013-09-25
  • 通讯作者: 葛正行 E-mail:896748848@qq.com
  • 基金资助:
    国家自然基金地区科学基金资助项目

rHSG gene regulates in COPD rats,airway fibroblast proliferation and apoptosis

  • Received:2012-11-19 Revised:2013-03-27 Online:2013-10-05 Published:2013-09-25

摘要: 目的 采用脂质体介导携带大鼠增殖抑制基因(rHSG)的真核表达载体,转染至COPD模型大鼠气道成纤维细胞,为干预 COPD 的气道成纤维细胞增殖,打下基因治疗基础。方法 构建真核表达载体pEGFP-N1,对重组质粒pEGFP-rHSG进行鉴定并测序;采用阳离子脂质体将重组质粒pEGFP-rHSG 转染至COPD模型大鼠气道成纤维细胞,分别感染24和48h及3、5和7d后,用实时荧光定量PCR(Real time-PCR)检测rHSGmRNA的不同时段表达水平,MTT、流式细胞仪检测转染后成纤维细胞增殖及凋亡。结果 证实重组质粒pEGFP-rHSG构建成功。转染24h,rHSGmRNA表达量开始增加,高峰在7d的时侯,各转染组间rHSG mRNA表达差别满足(P<0.05);转染48h后rHSG基因转染组成纤维细胞的增殖抑制明显低于未转染组成纤维细胞(P<0.05);转染后48h凋亡开始,与模型对照组相比,随着时间延长,凋亡逐渐增加,7d时候凋亡率达最大(P<0.05)。结论 外源性rHSG基因介导,能够使气道成纤维细胞的增殖受到抑制并诱导其凋亡。

关键词: 慢性阻塞性肺疾病, 气道重塑, 气道成纤维细胞, 大鼠增殖抑制基因

Abstract: Objective Using liposome-mediated carry the eukaryotic expression vector of rats proliferation inhibition gene (rHSG) and transfected into chronic obstructive pulmonary disease (COPD) model of rat airway fibroblasts, in order to lay a basis of gene therapy that intervent the proliferation of COPD airway fibroblasts. Methods The recombinant plasmid pEGFP-rHSG were identified and sequenced.After transfected the recombinant plasmid pEGFP the-rHSG to COPD rat model of airway fibroblasts through cationic liposome and infected 24 hours, 48 hours, 3 days,5 days,7 days,detect the expression levels of rHSGmRNA on different times by real-time fluorescence quantitative polymerase chain reaction (Real time-PCR), finally,using MTT, flow cytometry detect the proliferation and apoptosis of transfected fibroblast cell.Results The recombinant plasmid pEGFP- rHSG constructed successfully.The expression of rHSGmRNA began to increase when transfected 24 hours,peak at 7 days,the differences in rHSGmRNA expression between rHSG meet each transfection group, P <0.05; After 48 hours,MTT assay show that the proliferation of airway fibroblast was significantly higher inhibited in rHSG gene transfection group than in model control group,statistically significant difference (P<0.05).After 48 hours,apoptosis were increasing by flow cytometry, compared with the model group, the difference was significant(P<0.05).Conclusion When exogenous rHSG gene transfected into the COPD rat airway fibroblasts, inhibit proliferation and induce its apoptosis.

Key words: Chronic obstructive pulmonary disease(COPD), Airway remodeling, Airway Fibroblast, rHSG gene