癌变·畸变·突变 ›› 2009, Vol. 21 ›› Issue (6): 409-412.doi: 10.3969/j.issn.1004-616x.2009.06.001

• 论著 •    下一篇

腺病毒介导p55γ基因N末端的过表达对胃癌细胞增殖和迁移的抑制

冯丽;孙晓杰;高涵;李剸;张梅   

  1. 齐齐哈尔医学院生化与分子生物学教研室,黑龙江 齐齐哈尔 161006
  • 收稿日期:2009-09-18 修回日期:2009-09-28 出版日期:2009-11-30 发布日期:2009-11-30
  • 通讯作者: 孙晓杰

Inhibitory Effects of p55γ Gene N-terminal OverexpressionMediated by Adenovirus on Proliferation and Migration of Gastric Carcinoma Cells

FENG Li; SUN Xiao-jie; GAO Han; LI Shen; ZHANG Mei   

  1. Department of Biochemistry and Molecular Biology, Qiqihar Medical College, Qiqihar 161006, Heilongjiang, China
  • Received:2009-09-18 Revised:2009-09-28 Online:2009-11-30 Published:2009-11-30
  • Contact: SUN Xiao-jie

摘要: 背景与目的: 通过腺病毒介导,观察PI3K P55γ调节亚基N末端对胃癌细胞增殖和迁移的影响。 材料与方法: 在腺病毒E1基因转化的人胚肾细胞HEK293中扩增复制缺陷型重组腺病毒Ad-N24-GFP以及空载体病毒Ad-GFP,分别用Ad-GFP和Ad-N24-GFP感染MGC803细胞后,通过荧光显微镜观察病毒对肿瘤细胞的感染效率,计数活细胞,制作细胞生长曲线,观察Ad-N24-GFP对细胞生长的影响;并采用流式细胞术和细胞迁移实验分别检测Ad-N24-GFP对MGC803细胞周期和细胞运动迁移能力的影响。 结果: 重组腺病毒经过感染HEK293细胞后大量扩增,在病毒感染复数(MOI)为100时病毒对细胞的感染效率最高。与感染空载体的细胞相比,感染Ad-N24-GFP的MGC803细胞生长速度减慢、细胞倍增时间延长;Ad-N24-GFP的过表达使MGC803细胞G0/G1期百分率由(68.7±5)% 上升到(84.2±5.4)%,差异具有统计学意义(P<0.05);感染Ad-N24-GFP的MGC803细胞其细胞迁移能力明显降低,与空载体组细胞相比,差异亦具有统计学意义(P<0.05)。 结论: 腺病毒介导p55γ N末端24肽的过表达能够显著抑制胃癌MGC803细胞的增殖和迁移,其在胃癌的基因治疗上可能具有潜在的应用前景。

关键词: 腺病毒, p55γ, 胃癌, 细胞增殖, 迁移

Abstract: BACKGROUND AND AIM: To investigate the effects of overexpression of the 24-amino-acid N-terminal end of p55γ regulatory subunit of phosphoinositide-3 kinase on proliferation and migration mediated by adenovirus in MGC803 gastric carcinoma cells. MATERIALS AND METHODS: The recombinant adenovirus-Ad-N24-GFP and control virus Ad-GFP were amplified in HEK293 cells. The virus infection rate of tumor cells was determined by fluorescence microscope. The effects of Ad-N24-GFP on cell proliferation and cell cycle were detected by cell growth curve and flow cytometry. The effect of Ad-N24-GFP on cell migration was detected by Transwell migration assay. RESULTS: The infection rate of recombinant adenovirus of MGC803 cells was highest when MOI=100. Compared with control cells, the growth of MGC803 cells after Ad-N24-GFP infection was suppressed and cell doubling time was prolonged. The percentage of Ad-N24-GFP cells in G0/G1 phase was (84.2±5.4)%, significantly higher than that of control cells in G0/G1 phase (68.7±5)% (P<0.05). Overexpression of the Ad-N24-GFP fusion protein markedly resulted in decrease of MGC803 cell migration compared with the control cells (P<0.05). CONCLUSION: Overexpression of the p55 γ gene N-terminal 24 peptide mediated by adenovirus inhibited cell proliferation and migration in gastric carcinoma MGC803 cells. It could have potential application in gastric carcinoma gene therapy.

Key words: adenovirus, p55γ, gastric carcinoma, cell proliferation, migration

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