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ATP诱导胸腺Treg细胞表型改变的研究

刘澜涛,刘建香,苏  旭   

  1. 辐射防护与核应急中国疾病预防控制中心重点实验室,中国疾病预防控制中心辐射防护与核安全医学所,北京  100088
  • 收稿日期:2013-12-17 修回日期:2014-02-27 出版日期:2014-03-30 发布日期:2014-03-30
  • 通讯作者: 苏 旭,E-mail:suxu@nirp.cn
  • 作者简介:刘澜涛(1980- ),男,山东省泰安市人,助理研究员,研究方向:辐射免疫。
  • 基金资助:

    卫生行业科研专项(201002009)

The phenotypic changes of thymic regulatory T cells induced by ATP

LIU Lan-tao,LIU Jian-xiang,SU Xu   

  1. China CDC Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China
  • Received:2013-12-17 Revised:2014-02-27 Online:2014-03-30 Published:2014-03-30
  • Contact: 苏 旭,E-mail:suxu@nirp.cn
  • About author:刘澜涛(1980- ),男,山东省泰安市人,助理研究员,研究方向:辐射免疫。

摘要:

目的: 研究外源ATP对Treg细胞特异性及其表型的影响。方法:制备胸腺单细胞悬液,分别加入0、0.01、 0.1、0.5和1 mmol/L浓度的外源性ATP,作用24 h后利用荧光检测法分析胞外ATP浓度,然后利用流式细胞仪分析作用72 h后胸腺细胞中Treg细胞比例的变化及其FOXP3和CD39表达的变化。结果:ATP作用72 h后,与对照组比较,胸腺细胞数减少,Treg细胞比例下调,以1 mmol/L作用组下调显著(t=5.260,P=0.034);Treg细胞中FOXP3和CD39的平均荧光强度(MFI) 上调,以较高浓度(0.5和1 mmol/L)ATP作用组上调显著(P均<0.05)。结论:较高浓度ATP会导致Treg细胞数减少,但存活Treg细胞特异性和功能相关表型因子表达增强。

关键词: ATP, 调节性T细胞, 表型, 胸腺

Abstract:

OBJECTIVE: To analyze the effect of exogenous ATP exposure on the expression of phenotype factors in thymic regulatory T cells(Treg). METHODS:Thymocytes were separated and exposed to 0,0.01,0.1,0.5, 1 mmol/L of exogenous ATP in vitro,then at 72 h the percentage of Treg in thymocytes and their expressions of FOXP3,CD39 were analyzed using FACS. RESULTS:Both the number of thymocytes and the percentage of its Treg subset decreased,particularly in 1 mmol/L ATP exposure groups(t=5.260,P=0.034) and the mean fluorescence intensity of both FOXP3 and CD39 increased in the higher dosage ATP exposure group(0.5 and 1 mmol/L). CONCLUSION:Treg cell numbed decreased but the specificity and function-associated phenotypes of the viable Treg were enhanced after exposure to higher concentration of ATP.

Key words: ATP, regulatory T cell, phenotype, thymus