中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (31): 4945-4949.doi: 10.12307/2021.134

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

人脐带间充质干细胞来源外泌体抑制髓母细胞瘤Daoy细胞增殖并促其凋亡

衣志爽1 ,王植海2,李  明3,周清安1 ,杨保胜1    

  1. 新乡医学院三全学院,1临床学院诊断学教研室,3生命科学系,河南省新乡市  453000;2新乡市第二人民医院神经外科,河南省新乡市  453002

  • 收稿日期:2020-10-29 修回日期:2020-10-30 接受日期:2020-12-14 出版日期:2021-11-08 发布日期:2021-04-25
  • 通讯作者: 杨保胜,教授,新乡医学院三全学院临床学院诊断学教研室,河南省新乡市 453000
  • 作者简介:衣志爽,女,1982年生,黑龙江省哈尔滨市人,汉族,2009年新乡医学院毕业,硕士,主治医师,讲师,主要从事儿科疾病诊疗研究。
  • 基金资助:
    国家自然科学基金面上项目(82072802),项目负责人:李明;新乡医学院三全学院科学研究培育基金(XJKT201922),项目负责人:衣志爽

Exosomes from human umbilical cord-derived mesenchymal stem cells suppress the proliferation and promote the apoptosis of medulloblastoma Daoy cells

Yi Zhishuang1, Wang Zhihai2, Li Ming3, Zhou Qingan1, Yang Baosheng1   

  1. 1Department of Diagnostics, Clinical College, Xinxiang Medical University Sanquan College, Xinxiang 453000, Henan Province, China; 2Department of Neurosurgery, Xinxiang Second People’s Hospital, Xinxiang 453002, Henan Province, China; 3Academy for Life Science, Xinxiang Medical University Sanquan College, Xinxiang 453000, Henan Province, China 
  • Received:2020-10-29 Revised:2020-10-30 Accepted:2020-12-14 Online:2021-11-08 Published:2021-04-25
  • Contact: Yang Baosheng, Professor, Department of Diagnostics, Clinical College, Xinxiang Medical University Sanquan College, Xinxiang 453000, Henan Province, China
  • About author:Yi Zhishuang, Master, Attending physician, Lecturer, Department of Diagnostics, Clinical College, Xinxiang Medical University Sanquan College, Xinxiang 453000, Henan Province, China
  • Supported by:
    the National Natural Science Foundation of China (General Program), No. 82072802 (to LM); the Scientific Research Cultivation Fund of Xinxiang Medical University Sanquan College, No. XJKT201922 (to YZS)

摘要:

文题释义
外泌体:是指含有复杂RNA和蛋白质,直径在40-100 nm的盘状囊泡。1983年,外泌体首次于绵羊网织红细胞中被发现,多种细胞在正常及病理状态下均可分泌外泌体,其主要来源于细胞内溶酶体微粒内陷形成的多囊泡体,经多囊泡体外膜与细胞膜融合后释放到胞外基质中。

CFSE:是一种可对活细胞进行荧光标记的细胞染色剂,CFSE进入细胞后可以不可逆地与细胞内的氨基结合偶联到细胞蛋白质上。在细胞分裂增殖过程中,CFSE标记荧光可平均分配至2个子代细胞中,因此其荧光强度是亲代细胞的一半,用流式细胞仪在490 nm激发光处可对其进行分析。
背景:间充质干细胞能够产生大量的与其生物学功能相似的外泌体,但间充质干细胞来源外泌体对髓母细胞瘤Daoy细胞的影响仍不清楚。
目的:探讨人脐带间充质干细胞来源外泌体对髓母细胞瘤Daoy细胞增殖、凋亡的影响以及可能机制。
方法:分离、培养人脐带间充质干细胞,提取第4代人脐带间充质干细胞来源外泌体,Western blot检测外泌体标志蛋白CD9和CD81的表达。将人脐带间充质干细胞来源外泌体与Daoy细胞共培养96 h,采用流式细胞术、克隆形成实验检测Daoy细胞的增殖情况;流式细胞术检测Daoy细胞的凋亡情况;Western blot检测凋亡相关蛋白的表达水平。
结果与结论:Western blot检测人脐带间充质干细胞来源外泌体CD9和CD81呈阳性表达。与对照组比较,人脐带间充质干细胞来源外泌体抑制Daoy细胞增殖和克隆形成(P < 0.05,P < 0.01);促进Daoy细胞凋亡(P < 0.01);凋亡相关蛋白Cyclin D1和Bcl-2表达下调(P < 0.05),Caspase-3表达上调(P < 0.01)。结果表明,人脐带间充质干细胞来源外泌体可能通过调节细胞周期以及凋亡相关蛋白表达来抑制髓母细胞瘤Daoy细胞的增殖,并促进其凋亡。
https://orcid.org/0000-0001-9359-0596(衣志爽)

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

关键词: 干细胞, 人脐带间充质干细胞, 外泌体, 髓母细胞瘤, Daoy细胞, 增殖, 凋亡, 蛋白

Abstract: BACKGROUND:  Mesenchymal stem cells can produce a large number of exosomes, which has similar biological activity to mesenchymal stem cells. However, the effect of mesenchymal stem cell-derived exosomes on Daoy cells of medulloblastoma has yet to be determined.
OBJECTIVE: To investigate the effect of exosomes derived from human umbilical cord-derived mesenchymal stem cells on the proliferation and apoptosis of medulloblastoma Daoy cells and its potential mechanism.
METHODS:  Human umbilical cord-derived mesenchymal stem cells were isolated and cultured. Passage 4 of human umbilical cord-derived mesenchymal stem cells was collected. The expression of exosome markers CD9 and CD81 was detected by western blot assay. Exosomes extracted from human umbilical cord-derived mesenchymal stem cells were cocultured with Daoy cells for 96 hours. The proliferation of Daoy cells was detected by flow cytometry and colony formation assay. The apoptosis of Daoy cells was detected by flow cytometry. The expression levels of apoptosis related proteins were detected by western blot assay.  
RESULTS AND CONCLUSION: Western blot assay results showed that exosomes from human umbilical cord-derived mesenchymal stem cells were positive for CD9 and CD81. Compared with the control group, exosomes from human umbilical cord-derived mesenchymal stem cells inhibited the proliferation of Daoy cells and the formation of colonies (P < 0.05, P < 0.01), and promoted Daoy cell apoptosis (P < 0.01). Apoptosis related proteins Cyclin D1 and Bcl-2 were down regulated (P < 0.05), but expression level of Caspase-3 was up-regulated (P < 0.01). The results confirm that human umbilical cord-derived mesenchymal stem cells derived exosomes can suppress the proliferation of Daoy cells and promote its apoptosis possibly by regulating cell cycle and apoptosis related protein expression. 


Key words: stem cells, human umbilical cord-derived mesenchymal stem cells, exosomes, medulloblastoma, Daoy cells, apoptosis, protein

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