《中国康复理论与实践》 ›› 2017, Vol. 23 ›› Issue (8): 905-911.doi: 10.3969/j.issn.1006-9771.2017.08.008

• 基础研究 • 上一篇    下一篇

沉默ski基因对大鼠星形胶质细胞迁移的影响

赵鑫1,2,王兴文1,2,寇江力1,2,李忠浩1,2,郭永强1,2,伍亚民3,张海鸿1   

  1. 1.兰州大学第二医院骨科,甘肃兰州市 730030;
    2.甘肃省骨关节疾病研究重点实验室,甘肃兰州市 730030;
    3.第三军医大学大坪医院野战外科研究所三室,创伤、烧伤与复合伤国家重点实验室,重庆市 400042。
  • 收稿日期:2017-04-10 修回日期:2017-05-05 出版日期:2017-08-25 发布日期:2017-08-24
  • 通讯作者: 张海鸿,主任医师,副教授,硕士研究生导师,主要研究方向:脊柱外科。E-mail: zhanghaihong1968@sina.com。
  • 作者简介:赵鑫(1991-),男,汉族,山东潍坊市人,硕士研究生,主要研究方向:脊柱脊髓损伤。
  • 基金资助:
    国家自然科学基金项目(No.30772299);2.兰州大学第二医院科研基金项目(No.sdkyjj-04)。

Effect of Knocking Down ski on Migration of Astrocytes in Rats 

ZHAO Xin1,2, WANG Xing-wen1,2, KOU Jiang-li1,2, LI Zhong-hao1,2, GUO Yong-qiang1,2, WU Ya-min3, ZHANG Hai-hong1   

  1. 1. Department of Orthopedics, Second Clinical Medical College of Lanzhou University, Lanzhou, Gansu 730030, China;
    2. Key Laboratory of Orthopedics of Gansu Province, Lanzhou, Gansu 730030, China;
    3. State Key Laboratory of Trauma, Burns and Combined Injury, the Third Department of Research Institute of Surgery, Daping Hospital, Third Military University, Chongqing 400042, China
  • Received:2017-04-10 Revised:2017-05-05 Published:2017-08-25 Online:2017-08-24
  • Contact: ZHANG Hai-hong. E-mail: zhanghaihong1968@sina.com

摘要: 目的 研究ski基因在大鼠星形胶质细胞迁移过程中的作用。方法 分离大鼠脑皮质星形胶质细胞,体外培养。合成ski基因和阴性对照小干扰片段。设置ski-siRNA转染组、阴性对照组和空白对照组。采用脂质体法将特异性针对ski基因的siRNA和阴性对照siRNA转入大鼠星形胶质细胞。采用Western blotting检测各组ski蛋白的表达水平;采用Transwell细胞迁移实验和细胞划痕实验检测ski-siRNA转染后星形胶质细胞迁移能力的变化。结果 与空白对照组和阴性对照组比较,ski-siRNA转染组细胞内ski蛋白的相对表达水平显著降低(F=132.957, P<0.001)。Transwell细胞迁移实验发现,ski-siRNA转染组每孔迁移细胞数少于空白对照组和阴性对照组(F>47.197, P<0.05)。细胞划痕实验显示,转染组细胞1~5 d的划痕愈合率均明显低于对照组(F>69.187, P<0.01)。结论 沉默ski基因能显著抑制星形胶质细胞的迁移能力,ski可能参与星形胶质细胞的转移过程,进而调控胶质瘢痕的形成。

关键词: ski, RNA干扰, 星形胶质细胞, Transwell细胞迁移实验, 划痕实验, 大鼠

Abstract: Objective To investigate the effect of ski gene in migration process of astrocytes in rats. Methods Astrocytes were obtained from rats' cerebral cortex and cultured in vitro. siRNA targeting ski gene and negative control sequences were prepared. The ski-siRNA group, siRNA negative control group and untreated group were set in this experiment. The specific siRNA targeting ski gene was transfected into astrocytes with Lipofectamine?RNAiMAX Reagent. Then the ski protein levels were determined with Western blotting. After transfection, the changes in migration of astrocytes were measured with wound scratch assay and Transwell migration assay. Results Western blotting showed that the expression of ski protein was significantly lower in the ski-siRNA group than in the siRNA negative control group and untreated group (F=132.957, P<0.001). Transwell migration assay showed that the number of astrocytes crossing through chambers was less in the ski-siRNA group than in the siRNA negative control group and untreated group (F>47.197, P<0.05). Wound scratch assay showed that the wound healing rate was lower in the ski-siRNA group than in the control group one, two, three, four and five days after transfection (F>69.187, P<0.001). Conclusion Ski knocked down by siRNA could inhibit the migration ability of astrocytes. It is a reminding that ski may take part in the migration process of astrocytes, and moreover, ski may play an important role in the formation of glial scar.

Key words: ski, siRNA, astrocyte, Transwell migration assay, wound scratch assay, rats

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