Carcinogenesis, Teratogenesis & Mutagenesis

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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。

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