中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (1): 79-84.doi: 10.3969/j.issn.2095-4344.1528

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

人胎盘间充质干细胞CD200+亚群细胞的免疫特性

刘 婷,马晓娜,马海滨,杨婷婷,金毅然,梁雪云   

  1. 宁夏医科大学总医院宁夏人类干细胞研究所,宁夏回族自治区银川市 750004
  • 修回日期:2018-10-16 出版日期:2019-01-08 发布日期:2018-11-28
  • 通讯作者: 梁雪云,副研究员,硕士生导师,宁夏医科大学总医院宁夏人类干细胞研究所,宁夏回族自治区银川市 750004
  • 作者简介:刘婷,女,1982年生,宁夏回族自治区银川市人,回族,2007年兰州大学毕业,硕士,助理研究员,主要从事干细胞基础及临床应用研究。
  • 基金资助:

    国家自然科学基金(81460186),项目负责人:梁雪云

Immune properties of human CD200+ sub-population from human placenta-derived mesenchymal stem cells

Liu Ting, Ma Xiaona, Ma Haibin, Yang Tingting, Jin Yiran, Liang Xueyun   

  1. Ningxia Human Stem Cell Institute, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • Revised:2018-10-16 Online:2019-01-08 Published:2018-11-28
  • Contact: Liang Xueyun, Associate researcher, Master’s supervisor, Ningxia Human Stem Cell Institute, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • About author:Liu Ting, Master, Assistant researcher, Ningxia Human Stem Cell Institute, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81460186 (to LXY)

摘要:

文章快速阅读:

文题释义:
免疫调节:
是指免疫系统中的免疫细胞和免疫分子之间,以及与其他系统如神经内分泌系统之间的相互作用,使得免疫应答以最恰当的形式维持在最适当的水平。
间充质干细胞亚群细胞:间充质干细胞是一群复合细胞,2006年国际细胞治疗协会(ISCT)制定了间充质干细胞的最低标准,即CD73、CD90、CD105均≥95%,CD34、CD45≤2%。有研究报道从间充质干细胞中分离出具有某些更强特性的亚群细胞,例如STRO-1、ALDH、IGFR,该课题则是分离出具有较强免疫特性的CD200+亚群细胞。

摘要
背景:
在不同的研究中,间充质干细胞表现出相悖的免疫特性,这可能是因为间充质干细胞是一群复合细胞,不同的亚群细胞表现出不同的免疫特性。  
目的:从人胎盘间充质干细胞中分选获得CD200+亚群细胞,探讨该亚群细胞的免疫特性。
方法:采用流式细胞方法从人胎盘间充质干细胞中分选出CD200+亚群细胞,对其进行细胞表型、多向分化潜能鉴定;ELISA方法检测CD200+亚群细胞的白细胞介素6、白细胞介素8因子分泌量;混合淋巴细胞共培养体系检测CD200+亚群细胞的免疫调节功能。
结果与结论:①流式细胞术成功从人胎盘间充质干细胞中分选获得CD200+亚群细胞,该亚群细胞高表达CD44、CD73、CD105和CD90,而CD34、CD45、CD80和CD86为阴性,具有典型的间充质干细胞表面标志,可诱导分化为脂肪细胞和成骨细胞,分泌高水平的白细胞介素6和白细胞介素8;②淋巴细胞共培养体系中,与人胎盘间充质干细胞和CD200-亚群细胞相比,CD200+亚群细胞能够显著抑制被活化的淋巴细胞增殖,下调干扰素γ、白细胞介素2水平,而白细胞介素10水平明显上调;③该研究发现,从人胎盘间充质干细胞中分离获得的CD200+亚群细胞具有优于胎盘间充质干细胞和CD200-亚群细胞的免疫调节功能,为其临床应用提供了一定的理论依据。

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:
0000-0002-9945-9094(刘婷)

关键词: 胎盘, 间充质干细胞, CD200, 细胞亚群, 免疫特性, 免疫调节功能, 混合淋巴细胞共培养, 白细胞介素2, 白细胞介素10, 干扰素γ, 国家自然科学基金

Abstract:

BACKGROUND: In different studies, mesenchymal stem cells exhibit contradictory immune characteristics. This may be because mesenchymal stem cells are a group of complex cells and different subgroups exhibit different immune characteristics. 
OBJECTIVE: To isolate and identify a sub-population of placenta-derived mesenchymal stem cells with high positive surface antigen of CD200, and to investigate the immune characteristics of this sub-population. 
METHODS: Flow cytometry was utilized to sort CD200+ placenta-derived mesenchymal stem cells. Phenotypic characterization and multilineage differentiation of the sorted cells were determined. Cytokine secretion, involving interleukin-6 and interleukin-8, was measured by ELISA. Mixed lymphocyte proliferation assay was used to determine the immune characteristics of CD200+ placenta-derived mesenchymal stem cells. 
RESULTS AND CONCLUSION: The CD200+ placenta-derived mesenchymal stem cells exhibited homogeneous spindle shape, and highly expressed CD44, CD73, CD90 and CD105, negatively expressed CD34, CD45, CD80 and CD86. After induced differentiation, the cells were positively stained by oil red O staining and alizarlin red staining, which were the markers of adipocytes and osteoblasts. The results of ELISA indicated that the expression level of interleukin-6 and interleukin-8 in the CD200+ placenta-derived mesenchymal stem cells was strikingly higher than placenta-derived mesenchymal stem cells and CD200- placenta-derived mesenchymal stem cells. Compared with normal and CD200- placenta-derived mesenchymal stem cells, CD200+ placenta-derived mesenchymal stem cells inhibited T cell proliferation significantly, lowered the levels of interferon-γ and interleukin-2, and upregulated the level of interleukin-10. We found that CD200+ placenta-derived mesenchymal stem cells have better immunoregulatory capability compared with normal and CD200- placenta-derived mesenchymal stem cells, which may provide an ideal theoretical basis for clinical use.

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: Placenta, Mesenchymal Stem Cells, Immunomodulation, Tissue Engineering

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