中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (9): 1426-1431.doi: 10.3969/j.issn.2095-4344.2017.09.021

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

鹿茸多肽对心肌干细胞凋亡和线粒体膜稳定性的影响

黄晓巍,徐  岩,刘玥欣,李智萌,曲晓波   

  1. 长春中医药大学中医药与生物工程研究开发中心,吉林省长春市  130117
  • 出版日期:2017-03-28 发布日期:2017-03-31
  • 通讯作者: 曲晓波,教授,长春中医药大学中医药与生物工程研究开发中心,吉林省长春市 130117
  • 作者简介:黄晓巍,女,1972年生,吉林省长春市人,汉族,2004年长春中医学院毕业,硕士,主任药师,主要从事中药药理方面的研究。
  • 基金资助:

    吉林省卫生计生科研计划项目(2015Z062)

Effect of pilose antler polypeptides on apoptosis and membrane stability of mitochondria in cardiac stem cells

Huang Xiao-wei, Xu Yan, Liu Yue-xin, Li Zhi-meng, Qu Xiao-bo   

  1. Center for the Study of Chinese Medicine and Bio-engineering, Changchun University of Chinese Medicine, Changchun 130117, Jilin Province, China
  • Online:2017-03-28 Published:2017-03-31
  • Contact: Qu Xiao-bo, Professor, Center for the Study of Chinese Medicine and Bio-engineering, Changchun University of Chinese Medicine, Changchun 130117, Jilin Province, China
  • About author:Huang Xiao-wei, Master, Chief pharmacist, Center for the Study of Chinese Medicine and Bio-engineering, Changchun University of Chinese Medicine, Changchun 130117, Jilin Province, China
  • Supported by:

    the Scientific Research Plan for the Health and Family Plan of Jilin Province, No. 2015Z062

摘要:

文章快速阅读:

文题释义:
5-氮胞苷:
是一种胞嘧啶核苷类似物,同时也是一种经典的干细胞诱导剂,多见于骨髓间充质干细胞、胚胎干细胞等向心肌细胞分化实验。但5-氮胞苷作为一种化学诱导剂,具有一定的毒性,长期使用可能诱导细胞变异或死亡。
鹿茸多肽:是从新鲜鹿茸中提取的一类多肽类物质,主要含有缬氨酸、丙氨酸、赖氨酸和甘氨酸等,对多种组织损伤修复有明显的促进作用。研究表明,鹿茸多肽可以诱导心肌干细胞分化为心肌细胞,且未见毒性报道。 

 

摘要
背景:心肌干细胞在体外经鹿茸多肽诱导后可以分化为心肌细胞这一研究成果为其治疗心肌损伤提供了新思路。
目的:观察鹿茸多肽对心肌干细胞凋亡和线粒体膜稳定性的影响,探讨其作用机制。
方法:选取出生2 d的雄性Wistar大鼠,提取心肌干细胞,以培养皿作为实验单位,共计分为以下4组(n=12):鹿茸多肽组:使用鹿茸多肽(质量浓度为800 mg/L)进行诱导;联合组:使用5-氮胞苷(浓度为3 μmol/L)和鹿茸多肽(质量浓度为800 mg/L)联合诱导;5-氮胞苷组:使用5-氮胞苷(浓度为3 μmol/L)进行诱导;空白对照组:加入等量缓冲液进行诱导。诱导48 h后流式细胞仪检测心肌干细胞的凋亡率,免疫荧光检测心肌干细胞的线粒体膜电位,Western blotting方法检测心肌干细胞Nkx 2.5、GATA4、ATF-2、MEF-2C的表达水平。

结果与结论:①细胞培养2周后,出现大量的小、圆、亮细胞,心肌干细胞集落形成;②与空白对照组比较,5-氮胞苷组心肌干细胞凋亡率明显升高(P < 0.05),线粒体膜电位明显降低(P < 0.05);与5-氮胞苷组比较,鹿茸多肽组、联合组心肌干细胞凋亡率明显降低(P < 0.05,P < 0.01),线粒体膜电位明显升高(P < 0.05,P < 0.01);③与5-氮胞苷组比较,鹿茸多肽组及联合组Nkx2.5的表达水平明显升高(P < 0.05),各组GATA4、ATF-2表达水平不高,且差异无显著性意义(P > 0.05),MEF-2C表达在中等水平,各组间差异无显著性意义(P > 0.05);④结果表明,鹿茸多肽可降低心肌干细胞凋亡率,提高线粒体膜稳定性,其作用机制在一定程度上与提高Nkx 2.5表达有关,是否与GATA4、ATF-2、MEF-2C有关尚待进一步研究。

 

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: 0000-0002-9678-0704(黄晓巍)

关键词: 干细胞, 分化, 鹿茸多肽, 心肌干细胞, 线粒体, 凋亡率, 膜稳定性

Abstract:

BACKGROUND: Cardiac stem cells can differentiate into cardiomyocytes in vitro under induction of pilose antler polypeptides, which provides a new therapeutic idea for myocardial injury.

OBJECTIVE: To explore the effect of pilose antler polypeptides on the apoptosis rate and membrane stability of mitochondria in cardiac stem cells.
METHODS: We chose healthy male Wistar rats born 2 days to extract cardiac stem cells. The culture dish was used as the experimental unit, and extracted cells were divided into the following four groups (n=12). Blank control group: The same amount of buffer was added for induction; 5-azacytidine group: induced with 5-azacytidine (3 μmol/L); pilose antler polypeptides group: induced with pilose antler polypeptides (800 mg/L); combined group: induced with pilose antler polypeptides (800 mg/L) and 5-azacytidine (3 μmol/L). After 48 hours induction, apoptosis rate of cardiac stem cells in each group was detected with flow cytometry. The membrane potential of mitochondria in cardiac stem cells was detected with immunofluorescence. The expression level of Nkx 2.5, GATA4, ATF-2, and MEF-2C in cardiac stem cells was detected using western blot assay.

RESULTS AND CONCLUSION: There were small, round and bright cells after 2 weeks culture, and cell colonies of cardiac stem cells formed. The apoptosis rate of cardiac stem cells in the 5-azacytidine group increased significantly (P < 0.05) and its membrane potential decreased significantly compared with the blank control group (P < 0.05). The apoptosis rate of cardiac stem cells in the pilose antler polypeptides group and combined group decreased significantly compared with the 5-azacytidine group (P < 0.05, P < 0.01), and their membrane potential increased significantly (P < 0.05, P < 0.01). The results of western blot showed that the expression level of Nkx2.5 increased significantly in the pilose antler polypeptides group and combined group compared with the 5-azacytidine group (P < 0.05), while the expression levels of GATA4 and ATF-2 in each group were low and there were no significant differences among groups (P > 0.05). The expression level of MEF-2C in each group was at a middle level, and there were no significant differences among groups (P > 0.05). To conclude, our experimental findings indicate that pilose antler polypeptides could decrease the apoptosis rate and improve membrane stability of mitochondria in cardiac stem cells. The mechanism may be related to the increased expression of Nkx 2.5, but whether the mechanism is related to GATA4, ATF-2 and MEF-2C needs to be further studied.

 

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: Deer, Antlers, Myocytes, Cardiac, Mitochondria, Tissue Engineering

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