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hIGF-1基因转染对成纤维细胞增殖的影响

张绍昆1, 谭 岩2, 单玉兴1, 宋之明1, 徐莘香1   

  1. 1. 吉林大学第一医院骨科,吉林 长春130021;2. 吉林大学第一医院中心实验室,吉林 长春130021
  • 收稿日期:2004-12-02 修回日期:1900-01-01 出版日期:2006-03-28 发布日期:2006-03-28

Effects of human insulin-like growth factor 1 gene transfectionon proliferation of NIH3T3 fibroblasts

ZHANG Shao-kun1, TAN Yan2, SHAN Yu-xing1, SONG Zhi-ming1, XU Xin-xiang1   

  1. 1. Department of Orthopedics, First Hospital, Jilin University, Changchun 130021,China;2. Department of Central Laboratory, First Hospital, Jilin University, Changchun 130021, China
  • Received:2004-12-02 Revised:1900-01-01 Online:2006-03-28 Published:2006-03-28

摘要: 目的:探讨人胰岛素样生长因子1(hIGF-1)基因转染对成纤维细胞增殖的影响。方法:用脂质体转染法将pcDNA3.1-hIGF-1质粒转染鼠成纤维细胞NIH3T3,经G418筛选抗性NIH3T3细胞并继续培养4周,进行原位杂交和免疫细胞化学检测hIGF-1的表达,MTT方法和流式细胞仪检测NIH3T3细胞增殖能力。结果:转染pcDNA3.1-hIGF-1后的NIH3T3细胞内有大量hIGF-1 mRNA和蛋白质的表达;MTT检测显示转染pcDNA3.1-hIGF-1的NIH3T3细胞光吸收值增大,与未转染的NIH3T3细胞组比较,差异具有显著性(P<0.01);流式细胞仪检测显示转染组细胞,S期比例增加(59.3%),G1期比例减少(27.2%)。结论:pcDNA3.1-hIGF-1质粒转染成纤维细胞后,可以获得稳定表达,并能明显促进成纤维细胞的增殖。

关键词: 基因表达, 成纤维细胞, 3T3细胞, 细胞周期

Abstract: Objective To study the effects of human insulin-like growth factor 1 (hIGF-1) gene transfection on the proliferation of NIH3T3 fibroblasts. Methods The plasmid of pcDNA3.1-hIGF-1 was transfected into NIH3T3 fibroblasts by using Lipofectin method. The positive cell clones were selected with G418 and cultured for 4 weeks. The stable expression of hIGF-1 in the positive cells was determined by in situ hybridization and immunocytochemical analysis. MTT assay and flow cytometer analysis were used to observe the proliferation of NIH3T3 fibroblasts. Results hIGF-1 mRNA and protein expressed in NIH3T3 fibroblasts transfected with pcDNA3.1-hIGF-1 by in situ hybridization and immunocytochemical analysis. MTT assay showed the A value of transfected NIH3T3 fibroblasts rose, compared with untransfected NIH3T3 fibroblasts group, the difference was significant (P<0.01). Cellular proportion in S period (59.3%) was increased and it in G1 periods was decreased (27.2%) after transfection by flow cytometer measurement. Conclusion The stable expression of hIGF-1 in NIH3T3 fibroblasts transfected with pcDNA3.1-hIGF-1 is obtained. Gene transfection of hIGF-1 can stimulate the proliferation of NIH3T3 fibroblasts.

Key words: gene expression, fibroblasts, 3T3 cells, cell cycle