中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (1): 107-112.doi: 10.3969/j.issn.2095-4344.2016.01.019

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

间充质干细胞对再生障碍性贫血患者造血支持及T淋巴细胞分泌功能的影响

李罡灿,宋艳萍,张韵洁,李 光,王 浩,谢 佳   

  1. 西安市中心医院西安市血液病研究所,陕西省西安市 710003
  • 收稿日期:2015-11-30 出版日期:2016-01-01 发布日期:2016-01-01
  • 通讯作者: 谢佳,硕士,副主任医师,西安市中心医院西安市血液病研究所,陕西省西安市
  • 作者简介:李罡灿,男,1966年生,河南省许昌市人,1997年郑州大学医学院毕业,硕士,主任医师,主要从事造血干细胞移植和细胞治疗方面的研究。
  • 基金资助:

    西安市科技计划项目(SF1021(2))

Effects of mesenchymal stem cells on hematopoietic support and secretory function of T lymphocytes in patients with aplastic anemia

Li Gang-can, Song Yan-ping, Zhang Yun-jie, Li Guang, Wang Hao, Xie Jia   

  1. Xi’an Institute of Hematology, Xi'an Central Hospital, Xi’an 710003, Shaanxi Province, China
  • Received:2015-11-30 Online:2016-01-01 Published:2016-01-01
  • Contact: Xie Jia, Master, Associate chief physician, Xi’an Institute of Hematology, Xi’an Central Hospital, Xi’an 710003, Shaanxi Province, China
  • About author:Li Gang-can, Master, Chief physician, Xi’an Institute of Hematology, Xi’an Central Hospital, Xi’an 710003, Shaanxi Province, China
  • Supported by:

    the Science and Technology Plan of Xi’an, No. SF1021(2)

摘要:

文章快速阅读:

 

文题释义:
T淋巴细胞:T淋巴细胞是具有迟发型过敏反应和移植免疫等细胞免疫功能的细胞,对产生抗体前体细胞(B细胞)起促进作用、对免疫细胞起抑制调整作用的细胞所组成的细胞群。在实验动物小鼠和大鼠或在人体中,骨髓干细胞迁移到胸腺,并经过特殊的分化而成为T淋巴细胞,是胸腺产生细胞和胸腺依赖细胞,可与抗原进行反应,但不产生抗体,所以被称为抗原反应性细胞。
造血微环境:机体内造血过程中造血细胞周围所必须的特殊环境,包括基质细胞、细胞外基质和多种造血调节因子,以及神经和血管。造血干细胞必须黏附于基质细胞上才能存活,而基质细胞分泌的胶原、纤维连接蛋白、层素、造血连接蛋白及蛋白多糖等都与造血细胞的黏附有关。因此,造血细胞必须在造血微环境中才能定居、存活、增殖、分化与成熟。 

 

背景:近年来,间充质干细胞在再生障碍性贫血中的作用受到广泛关注,但是其作用机制尚不清楚。

目的:观察脐血间充质干细胞和骨髓间充质干细胞对再生障碍性贫血患者造血支持及T淋巴细胞分泌功能的影响。
方法:收集48例再生障碍性贫血患者和48例健康者的骨髓和健康产妇脐血,采用流式细胞法分离骨髓间充质干细胞和脐血间充质干细胞;将2种间充质干细胞分别与脐血单个核细胞共培养,计数红系爆式集落形成单位和粒-巨噬细胞集落形成单位数目;将间充质干细胞与植物血凝素刺激的再生障碍性贫血患者T淋巴细胞共培养,ELISA检测T细胞分泌的白细胞介素2、白细胞介素4和γ-干扰素水平。
结果与结论:①正常骨髓间充质干细胞和脐血间充质干细胞与脐血单个核细胞共培养后,其红系爆式集落形成单位和粒-巨噬细胞集落形成单位数目明显增多(P < 0.05)。②再生障碍性贫血患者骨髓间充质干细胞与脐血单个核细胞共培养后,其刺激红系爆式集落形成单位和粒-巨噬细胞集落形成单位形成的能力明显减弱(P < 0.05)。③与植物血凝素诱导的T细胞对照组相比,正常骨髓间充质干细胞共培养可明显抑制T细胞分泌白细胞介素2、白细胞介素4和γ-干扰素(P < 0.05)。正常脐血干细胞共培养组也显示出了相似的抑制效果。④与正常骨髓间充质干细胞和脐血间充质干细胞共培养组相比,再生障碍性贫血患者骨髓间充质干细胞共培养组抑制T细胞分泌白细胞介素2、白细胞介素4和γ-干扰素的能力明显降低(P < 0.05)。⑤结果表明再生障碍性贫血患者骨髓间充质干细胞存在功能缺陷,且对造血功能支持及对T细胞分泌功能的抑制作用明显弱于正常的骨髓间充质干细胞和脐血间充质干细胞,提示再生障碍性贫血患者间充质干细胞可能通过减弱其造血支持及抑制T细胞的功能来影响病理进程。 
ORCID: 0000-0002-3540-1344(谢佳)

关键词: 干细胞, 培养, 再生障碍性贫血, 脐血, 骨髓, 间充质干细胞, T淋巴细胞

Abstract:

BACKGROUND: Recently, the role of mesenchymal stem cells in aplastic anemia has been widely explored. However, its underlying mechanism remains unclearly.
OBJECTIVE: To study the effect of umbilical cord blood and bone marrow mesenchymal stem cells on hematopoietic support and secretory function of T lymphocytes in patients with aplastic anemia.
METHODS: Cord blood and bone marrow samples from 48 cases of aplastic anemia and 48 healthy lying-in women to isolate mesenchymal stem cells using flow cytometry. Mesenchymal stem cells from the cord blood and bone marrow were respectively co-cultured with cord blood mononuclear cells to count burst forming units-erythroid and colony forming units-granulocyte/macrophage. Mesenchymal stem cells were co-cultured with T lymphocytes from aplastic anemia patients undergoing phytohemagglutinin stimulation, and ELISA was used to detect interleukin-2, interleukin-4 and interferon-γ levels secreted from T lymphocytes.
RESULTS AND CONCLUSION: The number of burst forming units-erythroid and colony forming units-granulocyte/macrophage significantly increased in normal bone marrow or umbilical cord blood mesenchymal stem cells co-cultured with cord blood mononuclear cells (P < 0.05), but reduced remarkably in umbilical cord blood mesenchymal stem cells from aplastic anemia patients co-cultured with cord blood mononuclear cells (P < 0.05). Levels of interleukin-2, interleukin-4 and interferon-γ from T lymphocytes were inhibited significantly after co-culture with normal bone marrow mesenchymal stem cells compared with phytohemagglutinin-induced T lymphocytes (P < 0.05). There was a similar inhibitory effect after co-culture with normal umbilical cord blood mesenchymal stem cells. There was a significantly reduction in the capacity of inhibiting interleukin-2, interleukin-4 and interferon-γ levels from T lymphocytes after co-culture with bone marrow mesenchymal stem cells from aplastic anemia patients (P < 0.05). Aplastic anemia patients show some functional defects in their bone marrow mesenchymal stem cells that have a weaker inhibitory role than normal bone marrow or umbilical cord blood mesenchymal stem cells in the hematopoietic support and secretory function of T lymphocytes. These findings indicate that mesenchymal stem cells from aplastic anemia patients can influence the pathological progress through weakening hematopoietic support and secretory function of T lymphocytes. 

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