中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (29): 4657-4662.doi: 10.3969/j.issn.2095-4344.0623

• 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外泌体可抑制Th22细胞的表达及功能

李伟伟,李晓丰,侯 萍,李剑平   

  1. 沈阳中心血站(辽宁省血液中心),辽宁省沈阳市 110044
  • 修回日期:2018-05-17 出版日期:2018-10-18 发布日期:2018-10-18
  • 通讯作者: 李剑平,博士,主任医师,沈阳中心血站(辽宁省血液中心),辽宁省沈阳市 110044
  • 作者简介:李伟伟,女,1983年生,山东省禹城市人,汉族,博士,主管技师,主要从事分子免疫与免疫治疗等方面的研究。
  • 基金资助:

    2017年辽宁省博士科研启动基金指导计划项目(21070520339)

Exosomes derived from human umbilical cord mesenchymal stem cells suppress Th22 expression and function

Li Wei-wei, Li Xiao-feng, Hou Ping, Li Jian-ping   

  1. Shenyang Blood Center (Liaoning Provincial Blood Center), Shenyang 110044, Liaoning Province, China
  • Revised:2018-05-17 Online:2018-10-18 Published:2018-10-18
  • Contact: Li Jian-ping, MD, Chief physician, Shenyang Blood Center (Liaoning Provincial Blood Center), Shenyang 110044, Liaoning Province, China
  • About author:Li Wei-wei, PhD, Technician in charge, Shenyang Blood Center (Liaoning Provincial Blood Center), Shenyang 110044, Liaoning Province, China
  • Supported by:

    Liaoning Provincial Doctoral Research Foundation Project in 2017, No. 21070520339

摘要:

文章快速阅读:

文题释义:
人脐带间充质干细胞外泌体:
是由人脐带间充质干细胞分泌的内含细胞相关活性分泌物的细胞间重要信息传递物质,参与人脐带间充质干细胞介导的免疫调节。该研究收集第4代人脐带间充质干细胞培养上清液,采用试剂盒法提取外泌体并用其培养人外周血单核细胞,检测其对T细胞的调节能力。
Th22细胞:是一种新型CD4+辅助T细胞,分泌白细胞介素22和肿瘤坏死因子α。该研究为探讨人脐带间充质干细胞外泌体对Th22细胞功能及免疫调节功能的影响及作用方式,制备人脐带间充质干细胞外泌体和外周血单个核细胞的共培养体系。采用流式细胞术等实验技术,观察细胞表面膜分子表达,证实人脐带间充质干细胞外泌体抑制了Th22细胞的表达比例并降低其主要细胞因子白细胞介素22的表达含量。

 

摘要
背景:
Th22细胞是一种新型CD4+辅助T细胞,人脐带间充质干细胞外泌体具有T细胞免疫调节功能。
目的:探讨人脐带间充质干细胞分泌的外泌体对Th22细胞免疫调节功能的影响。  
方法:分离培养人脐带间充质干细胞,STR基因分型鉴定细胞株特性。收集第4代人脐带间充质干细胞上清,提取外泌体,透射电镜观察形态与粒径,Western blot检测表面特异标志CD63、CD81的表达,BCA法测定外泌体浓度;人脐带间充质干细胞外泌体与淋巴细胞刺激剂活化的正常人外周血单个核细胞共培养6 h,流式细胞术检测Th22细胞的比例以及对CD3+CD4+T、CD3+CD8+T细胞增殖能力的影响;共培养72 h,流式细胞术检测白细胞介素22的含量。
结果与结论:成功建立人脐带间充质干细胞原代细胞系且可稳定传代。人脐带间充质干细胞外泌体具有典型的外泌体形态及标识性蛋白,可明显抑制CD3+CD4+T细胞(P < 0.05)和CD3+CD8+T细胞(P < 0.01)的增殖,抑制Th22细胞的表达比例并降低其主要细胞因子白细胞介素22的表达含量(P < 0.01)。结果表明,人脐带间充质干细胞分泌的外泌体可以抑制Th22细胞的表达及功能,具有免疫调节能力,有望成为一种免疫治疗的新选择。

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: 0000-0002-7254-1266(李伟伟)

关键词: 脐带间充质干细胞, 外泌体, Th22, 白细胞介素22, 免疫, 流式细胞术, 干细胞

Abstract:

BACKGROUND: Th22 cells are a novel type of CD4+ helper T cells. Exosomes derived from human umbilical cord mesenchymal stem cells (hUCMSCs) have T cell immunomodulatory function.
OBJECTIVE: To investigate the Th22 cell immunomodulatory ability of exosomes secreted from hUCMSCs.
METHODS: hUCMSCs were isolated and cultured, and cell line was authenticated using short tandem repeat (STR) analysis. Exosomes were extracted from the supernatant of passage 4 hUCMSCs. Morphology and particle size of the exosomes were detected under transmission electron microscope. The expression of specific surface marker CD63 and CD81 were detected by western blot. The concentration of exosomes was evaluated by BCA assay. Cell activation cocktail stimulated peripheral blood mononuclear cells from healthy donors were co-cultured with exosomes for 6 hours. The percentage of Th22 cells and the proliferation of CD3+CD4+T cells and CD3+CD8+T cells were detected by flow cytometry. Flow cytometry was also used to test the level of interleukin 22 at 72 hours of co-culture.
RESULTS AND CONCLUSION: Successfully established hUCMSCs primary cell line could stably passage. Exosomes secreted from hUCMSCs had typical exosomal morphology and marker proteins, and significantly inhibited the proliferation of CD3+CD4+T cells (P < 0.05) and CD3+CD8+T cells (P < 0.01). These exosomes also inhibited the proliferation of Th22 cells, and reduced the level of interleukin 22 in the cells (P < 0.01). These findings indicate that exosomes secreted from hUCMSCs inhibit Th22 cell expression and function, and have the immunomodulatory function of Th22 cells in vitro, which can be a new therapeutic agent for the treatment of immune disorders.

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: Umbilical Cord, Mesenchymal Stem Cells, Exosomes, Immunomodulation, Tissue Engineering

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