中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (29): 4629-4634.doi: 10.3969/j.issn.2095-4344.2017.29.007

• 脂肪干细胞 adipose-derived stem cells • 上一篇    下一篇

5-氮杂胞苷联合血管紧张素Ⅱ诱导脂肪间充质干细胞向心肌细胞的分化

王 静1,韩江红1,李 琼2   

  1. 1新乡医学院三全学院,河南省新乡市 453000;2新乡医学院,河南省新乡市 453000
  • 修回日期:2017-05-02 出版日期:2017-10-18 发布日期:2017-11-08
  • 通讯作者: 李琼,博士,副教授,新乡医学院,河南省新乡市 453000
  • 作者简介:王静,女,1982年生,河南省南阳市人,汉族,硕士,讲师,主要从事心肌组织再生研究。
  • 基金资助:

    河南科技发展攻关项目(2015HNJ0031)

5-Azacytidine combined with angiotensin II induces differentiation of  adipose-derived mesenchymal stem cells into cardiomyocytes

Wang Jing1, Han Jiang-hong1, Li Qiong2   

  1. 1Sanquan College of Xinxiang Medical University, Xinxiang 453000, Henan Province, China; 2Xinxiang Medical University, Xinxiang 453000, Henan Province, Chin
  • Revised:2017-05-02 Online:2017-10-18 Published:2017-11-08
  • Contact: Li Qiong, M.D., Associate professor, Xinxiang Medical University, Xinxiang 453000, Henan Province, China
  • About author:Wang Jing, Master, Lecturer, Sanquan College of Xinxiang Medical University, Xinxiang 453000, Henan Province, China
  • Supported by:

    the Scientific Development Program of Henan Province, No. 2015HNJ0031

摘要:

文章快速阅读:

文题释义:
血管紧张素Ⅱ:
是血管紧张素中最重要的组成部分。人体的血管平滑肌、肾上腺皮质球状带细胞以及脑的一些部位、心脏和肾脏器官的细胞上存在有血管紧张素受体。血管紧张素Ⅱ与血管紧张素受体结合,引起相应的生理效应。
心肌细胞:又称心肌纤维,有横纹,受自主神经支配,属于有横纹的不随意肌,具有兴奋收缩的能力。呈短圆柱形,有分支,其细胞核位于细胞中央。各心肌纤维分支的末端可相互连接构成肌纤维网。广义的心肌细胞包括组成窦房结、房内束、房室交界部、房室束(即希斯束)和浦肯野纤维等的特殊分化了的心肌细胞,以及一般的心房肌和心室肌工作细胞。

 

摘要
背景:
采取有效措施修复坏死心肌成为临床治疗心肌梗死的新方向。
目的:探讨5-氮杂胞苷联合血管紧张素Ⅱ对小鼠脂肪间充质干细胞向心肌细胞分化的影响。
方法:取20只4周龄ICR小鼠,利用Ⅰ型胶原酶消化法获得脂肪间充质干细胞,观察细胞的形态学特点,运用MTT法检测细胞的増殖情况,运用免疫荧光技术检测细胞表面抗原CD90,CD105,CD73,CD45的表达。第4代脂肪间充质干细胞培养24 h后,更换为含15 μmol/L 5-氮杂胞苷和15 μmol/L 5-氮杂胞苷+0.1 μmol/L血管紧张素Ⅱ的培养基诱导24 h,然后更换为完全培养基,Western Blot检测细胞中cTnT蛋白表达。
结果与结论:①原代脂肪间充质干细胞胞核较小,呈梭形、星形,传代后细胞体积增大,形态趋于一致,排列规则;②第3代小鼠脂肪间充质干细胞的生长曲线呈现“S”形,第1-3天为潜伏期,第4天进入对数生长期,第5-7天细胞生长达到峰值,进入平稳期;③第4代脂肪间充质干细胞表面CD90、CD105及CD73呈阳性表达,CD45阴性表达;④5-氮杂胞苷联合血管紧张素Ⅱ组心肌细胞中cTnT蛋白表达量显著高于5-氮杂胞苷(P < 0.05);⑤结果表明,5-氮杂胞苷联合血管紧张素Ⅱ能够显著促进脂肪间充质干细胞向心肌细胞样细胞分化。

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
ORCID:
0000-0002-3451-3862(王静)

关键词: 干细胞, 脂肪干细胞, 心肌细胞, 5-氮杂胞苷, 脂肪间充质干细胞, 血管紧张素Ⅱ, Ⅰ型胶原酶, Western Blot, 免疫荧光技术, cTnT, 心肌样细胞分化率

Abstract:

BACKGROUND: Taking effective measures for myocardial necrosis develops a trend in the clinical treatment of myocardial infarction.
OBJECTIVE: To investigate the mechanism of 5-azacytidine combined with angiotensin II in the differentiation of mouse adipose-derived mesenchymal stem cells into cardiomyocytes.
METHODS: Twenty ICR mice aged 4 weeks old were used to isolate adipose-derived mesenchymal stem cells using type I collagenase digestion method. Cell morphology was observed, cell proliferation was detected using MTT, and immunofluorescence technique was used to detect the expression of CD90, CD105, CD73 and CD45. Passage 4 adipose-derived mesenchymal stem cells were cultured for 24 hours, then induced by 15 μmol/L 5-azacytidine or 
15 μmol/L 5-azacytidine plus 0.1 μmol/L angiotensin II for another 24 hours, and finally cultured in a complete medium. The expression of cTnT protein in myocardial cells was detected by western blot assay.
RESULTS AND CONCLUSION: Primary adipose-derived mesenchymal stem cells with small nuclei were spindle-shaped or starlike. After passage, the cells were increased in size, with uniform shape and regular arrangement. Passage 3 mouse adipose-derived mesenchymal stem cells showed an S-shaped growth curve: days 1-3 was incubation period, the cells showed logarithmic growth at day 4, the cell growth reached the peak at days 5-7, and then entered stationary phase. The passage 4 cells were positive for CD90, CD105 and CD73, but negative for CD45. The expression of cTnT was significantly higher after cell induction with 5-azacytidine combined with angiotensin II than 5-azacytidine alone. In conclusion, the combined use of 5-azacytidine and angiotensin II is beneficial for the cardiomyocyte-like differentiation of adipose-derived mesenchymal stem cells.

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

Key words: Adipose Tissue, Mesenchymal Stem Cells, Angiotensin II, Myocytes, Cardiac, Tissue Engineering

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