中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (23): 3616-3621.doi: 10.3969/j.issn.2095-4344.2014.23.002

• 脐带脐血干细胞 umbilical cord blood stem cells • 上一篇    下一篇

Cdc42参与脐带间充质干细胞向炎性因子的趋化

刘素蕊1,李俊峡2,杨晓亚1,李 烛1,高裕华1,许胜茹1,王更银1   

  1. 1解放军白求恩国际和平医院输血科,河北省石家庄市 050082;2解放军北京军区总医院心血管内科,北京市 100700
  • 修回日期:2014-03-29 出版日期:2014-06-04 发布日期:2014-06-04
  • 通讯作者: 王更银,主任技师,白求恩国际和平医院输血科,河北省石家庄市 050082
  • 作者简介:刘素蕊,女,1982年生,河北省邢台市人,汉族,2009年四川大学生物治疗国家重点实验室毕业,硕士,主治医师,主要从事间充质干细胞研究。
  • 基金资助:

    国家自然科学基金青年项目(81001106)

Cdc42 takes a role in the chemotaxis of umbilical cord mesenchymal stem cells to inflammatory cytokines

Liu Su-rui1, Li Jun-xia2, Yang Xiao-ya1, Li Zhu1, Gao Yu-hua1, Xu Sheng-ru1, Wang Geng-yin1   

  1. 1Department of Blood Transfusion, Bethune International Peace Hospital, Shijiazhuang 050082, Hebei Province, China; 2Department of Cardiology, General Hospital of Beijing Military Region, Beijing 100700, China
  • Revised:2014-03-29 Online:2014-06-04 Published:2014-06-04
  • Contact: Wang Geng-yin, Chief technician, Department of Blood Transfusion, Bethune International Peace Hospital, Shijiazhuang 050082, Hebei Province, China
  • About author:Liu Su-rui, Master, Attending physician, Department of Blood Transfusion, Bethune International Peace Hospital, Shijiazhuang 050082, Hebei Province, China
  • Supported by:

     the National Natural Science Foundation of China, No. 81001106

摘要:

背景:间充质干细胞移植后的归巢能力关系到细胞移植的疗效,研究其趋化和迁移的调控将有助于提高间充质干细胞临床应用的价值。

目的:观察Cdc42在人脐带间充质干细胞定向迁移中的作用。
方法:首先以组织块法分离培养人脐带间充质干细胞,与炎性因子肿瘤坏死因子α、白细胞介素1β、转化生长因子β共培养后Western检测Cdc42表达变化。化学合成Cdc42的干扰RNA,转染细胞后分别采用Transwell和Matrigel胶观察细胞迁移和黏附能力。应用Western检测Cdc42下游靶分子ERK1/2的变化。

结果与结论:与炎性因子共培养后的人脐带间充质干细胞中Cdc42表达明显增加,接近无因子对照组的2倍水平。siRNA下调Cdc42的表达能够显著抑制人脐带间充质干细胞的迁移和黏附,且其下游信号分子ERK1/2的表达以及磷酸化水平均相应受到抑制。提示体外培养环境下Cdc42参与了人脐带间充质干细胞的趋化过程。


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程


全文链接:

关键词: 干细胞, 脐带脐血干细胞, 间充质干细胞, Cdc42, 迁移, 炎性因子, 国家自然科学基金

Abstract:

BACKGROUND: The homing ability of mesenchymal stem cells is closely associated with the effects of cell transplantation. Clarifying the mechanism of chemotaxis and migration will contribute to enhance the clinical application of mesenchymal stem cells.

OBJECTIVE: To investigate the effect of Cdc42 in the homing of human umbilical cord mesenchymal stem cells.
METHODS: First, mesenchymal stem cells were isolated from human umbilical cord, and co-cultured with tumor necrosis factor α, interleukin-1β, and transforming growth factor β. Western blot assay was used to test the level of Cdc42. Besides, Cdc42 siRNA was synthesized by chemical method to transfect the cells, and cell migration and adhesion were measured by Transwell and Matrigel separately. Meanwhile, the activity of signal molecule, extracellular regulated protein kinase 1/2, was evaluated by western blot.
RESULTS AND CONCLUSION: The results indicated that the inflammation factors induced the highly expression of Cdc42 in human umbilical cord mesenchymal stem cells, almost double level to controls. siRNA notably inhibited the migration and adhesion of human umbilical cord mesenchymal stem cells through Cdc42 down-regulation, and the extracellular regulated protein kinase 1/2 and phosphorylation form were also decreased simultaneously. In a word, we speculate Cdc42 plays a role in the chemotaxis of human umbilical cord mesenchymal stem cells in vitro.

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程


全文链接:

Key words: stem cells, mesenchymal stem cells, cdc42 GTP-binding protein, cell movement

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