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中国临床药理学与治疗学 ›› 2019, Vol. 24 ›› Issue (5): 496-502.doi: 10.12092/j.issn.1009-2501.2019.05.003

• 基础研究 • 上一篇    下一篇

白介素12A对CD4+CD25+Foxp3+Treg增殖分化的促进作用

张晓玲1,官俏兵1,杨 毅2,郭 丽3,韩晨阳2   

  1. 1嘉兴市第二医院神经内科,2药学部,3中心实验室,嘉兴 314001,浙江
  • 收稿日期:2018-11-12 修回日期:2018-12-27 出版日期:2019-05-26 发布日期:2019-05-28
  • 通讯作者: 韩晨阳,男,硕士,药师,研究方向:神经药理学。 Tel:0573-82795090 E-mail:691513770@qq.com
  • 作者简介:张晓玲,女,硕士,主任医师,研究方向:神经免疫。 Tel:0573-82795090 E-mail:xiaoling-zhang66@163.com
  • 基金资助:

    浙江省自然科学基金项目(LYY19H280003);浙江省科技厅项目(2017C37174);浙江省卫生厅项目(2018KY804)

Effect of interleukin 12A on proliferation and differentiation of CD4+CD25+Foxp3+Treg

ZHANG Xiaoling1,GUAN Qiaobin1,YANG Yi2, GUO Li3,HAN Chenyang2   

  1. 1 Department of Neurology, 2 Pharmacy, 3 Central Laboratory, the Second Hospital of Jiaxing, Jiaxing 314001, Zhejiang, China
  • Received:2018-11-12 Revised:2018-12-27 Online:2019-05-26 Published:2019-05-28

摘要:

目的: 研究白介素12A(IL-12A)促进CD4+CD25-T细胞向CD4+CD25+Foxp3+Treg(iTreg)增殖分化的作用。方法: 采用免疫磁珠分选法分选出脐带血中CD4+CD25-T细胞,实验组和对照组均采用抗CD3和抗CD28单克隆抗体活化,并加入10 ng/mL的TGF-β1诱导,而实验组加入5 ng/mL的IL-12A同时诱导。细胞培养72 h后,采用流式细胞术(FACS)检测CD4+CD25+Foxp3+Treg(iTreg)细胞的比例,蛋白免疫印迹(Western-Blot)法检测细胞中Foxp3、Smad2、Smad3、Smad6的表达,实时荧光定量PCR检测TGF-β1、Foxp3、Smad2、Smad3、Smad6的mRNA表达。体外共培养诱导后iTreg和CD4+CD25-T细胞,CCK-8法评价淋巴细胞活性。体外加入5 ng/mL的IL-12A与iTreg、CD4+CD25-T细胞共培养检测IL-12A协同iTreg对于CD4+CD25-T细胞活性的影响。结果:FACS检测,IL-12A可以促进CD4+CD25-T向iTreg的分化,CCK-8结果显示,iTreg可以以浓度依赖方式抑制CD4+CD25-T细胞活性。而IL-12A可以协同iTreg对于CD4+CD25-T细胞活性的抑制作用。Western-Blot和RT-QPCR结果显示,iTreg分化过程中Foxp3、Smad2、Smad3、Smad6的表达水平增高,且相关mRNA的水平也增高。结论:IL-12A可以促进iTreg的诱导分化,对于效应T细胞的抑制有着一定的协同作用。

关键词: 白介素12A, 调节性T细胞, 效应T细胞, TGF-β1

Abstract:

AIM: To study the role of interleukin 12A (IL-12A) in promoting proliferation and differentiation of CD4+CD25-T cells into CD4+CD25+Foxp3+Treg(iTreg). METHODS: CD4+CD25-T cells in umbilical cord blood were selected by immunomagnetic beads. Both the experimental group and the control group were activated by anti-CD3 and anti-CD28 monoclonal antibodies, and induced by adding 10 ng/mL of TGF-1, while the experimental group was simultaneously induced by adding 5 ng/mL of IL-12A.After the cells were cultured for 72 h, the ratio of CD4+CD25+Foxp3+Treg (iTreg) cells was detected by flow cytometry (FACS). The expression of Foxp3, Smad2, Smad3 and Smad6 in the cells was detected by protein immunoblotting (Western-Blot), and the expression of TGF-β1 was detected by real time fluorescence quantitative PCR.iTreg and CD4+CD25-T cells were induced by co-culture in vitro, and lymphocyte activity was assessed by CCK-8.The co-culture of 5 ng/mL IL-12A with iTreg and CD4+CD25-T cells in vitro was used to detect the effect of IL-12A and iTreg on the activity of CD4+CD25-T cells.RESULTS:IL-12A could promote the differentiation of CD4+CD25-T into iTreg by FACS detection. CCK-8 showed that iTreg could inhibit the activity of CD4+CD25-T cells in a concentration-dependent manner. IL-12A can synergize the inhibitory effect of iTreg on CD4+CD25-T cell activity.Western-Blot and RT-QPCR results showed that Foxp3, Smad2, Smad3 and Smad6 expression levels were increased during iTreg differentiation, and related mRNA levels also was increased. CONCLUSION: IL-12A can promote the differentiation of iTreg and synergistic effect on the inhibition of effector T cells.

Key words: interleukin 12A, regulatory T cells, effect T cells, TGF-β1

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