中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (5): 754-760.doi: 10.3969/j.issn.2095-4344.2014.05.017

• 移植与免疫 transplantation and Immunology • 上一篇    下一篇

小干扰RNA抑制成熟树突细胞表面抗原CD80/CD86的表达

严志东1,闫  佳2,颛孙永勋1,陈  瑞1,张  蔚1,冯素玲1,李建国1   

  1. 1中山大学孙逸仙纪念医院呼吸内科,广东省广州市  510120;2天津医科大学总医院重症医学科,天津市  300052
  • 修回日期:2013-11-22 出版日期:2014-01-29 发布日期:2014-01-29
  • 通讯作者: 李建国,博士,教授,硕士生导师,中山大学呼吸疾病研究所,中山大学孙逸仙纪念医院呼吸内科,广东省广州市510120
  • 作者简介:严志东,男,1985年生,广西壮族自治区贺州市人,汉族,中山大学孙逸仙纪念医院在读硕士,主要从事哮喘和干细胞方面的研究。
  • 基金资助:

    呼吸疾病国家重点实验室开放课题(2007DA80154F1107)

Small interfering RNA inhibits the expression of surface antigens CD80/CD86 from mature dendritic cells

Yan Zhi-dong1, Yan Jia2, Zhuansun Yong-xun1, Chen Rui1, Zhang Wei1, Feng Su-ling1, Li Jian-guo1   

  1. 1Department of Respiratory Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou  510120, Guangdong Province, China; 2Department of Intensive Care Unit, Tianjin Medical University General Hospital, Tianjin 300052, China
  • Revised:2013-11-22 Online:2014-01-29 Published:2014-01-29
  • Contact: Li Jian-guo, M.D., Professor, Master’s supervisor, Department of Respiratory Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
  • About author:Yan Zhi-dong★, Studying for master’s degree, Department of Respiratory Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
  • Supported by:

     the Open Program of National Key Laboratory of Respiratory Disease, No. 2007DA80154F1107

摘要:

背景:成熟树突细胞可通过其表面抗原CD80/CD86来启动Th细胞活化,促使Th细胞向Th1细胞分化减少、向Th2 细胞方向分化增多。

目的:探讨小干扰RNA抑制哮喘小鼠成熟树突细胞表面抗原CD80/CD86表达后对Th1及Th2型细胞因子干扰素γ、白细胞介素4分泌的影响。
方法:建立哮喘小鼠模型,分离哮喘小鼠骨髓成熟树突细胞,流式细胞术检测表面标记物CD11c、CD80、CD86的阳性表达率;设计合成CD80/CD86相关小干扰RNA转染哮喘小鼠成熟树突细胞,荧光定量PCR、流式细胞术检测干扰前后成熟树突细胞中CD80/CD86 mRNA和相应蛋白的表达,将干扰组、未干扰组、转染试剂对照组的成熟树突细胞分别与小鼠T淋巴细胞共培养,ELISA检测上清液中Th1及Th2型细胞因子干扰素γ、白细胞介素4分泌水平。

结果与结论:①正常组成熟树突细胞的CD80/CD86的表达与哮喘组相比均明显降低(均P < 0.05)。②小干扰RNA转染哮喘小鼠成熟树突细胞后,干扰组CD80/CD86 mRNA及其蛋白表达水平较其他组均明显降低(均 P < 0.05)。③小干扰RNA转染后干扰组共培养体系中干扰素γ水平明显高于其他组(均P < 0.05),白细胞介素4水平则明显低于其他组(均P < 0.05)。提示哮喘小鼠成熟树突细胞高表达CD80/CD86,小干扰RNA特异性抑制哮喘小鼠成熟树突细胞中CD80/CD86的表达,能增加干扰素γ并减少白细胞介素4的分泌,从而纠正Th1/Th2失衡。



中国组织工程研究
杂志出版内容重点:肾移植肝移植移植;心脏移植;组织移植;皮肤移植;皮瓣移植;血管移植;器官移植组织工程


全文链接:

关键词: 实验动物, 组织构建, 小干扰RNA, 树突细胞, 表面抗原, CD80, CD86, T淋巴细胞, 干扰素γ, 白细胞介素4, 哮喘小鼠

Abstract:

BACKGROUND: The surface antigen CD80/CD86 on mature dendritic cells can activate helper T (Th) cells, reduce the differentiation of Th cells toward Th1 cells, and promote the differentiation of Th cells toward Th2 cells.

OBJECTIVE: To investigate the effect of small interfering RNA (siRNA) inhibiting the expression of surface antigens CD80/CD86 from asthmatic murine mature dendritic cells on Th1/Th2 type cytokines, interferon-γ and interleukin-4.
METHODS: Asthmatic model of mice was established; then bone marrow-derived mature dendritic cells were separated and cultured. The expression of CD11c, CD80 and CD86 on mature dendritic cells were examined by flow cytometry. The siRNA was transferred into mature dendritic cells of asthmatic mice, and the CD80/CD86 mRNA and protein expression before and after interference were determined by fluorescent quantitative PCR and flow cytometry. The mature dendritic cells in non-siRNA group, siRNA group and negative siRNA group were co-cultured with T cells. The interferon-γ and interleukin-4 productions were measured by enzyme-linked immunosorbent assay.

RESULTS AND CONCLUSION: (1) The expression of CD80/CD86 on the mature dendritic cells of asthmatic group was significantly higher than that in normal control group (all P < 0.05). (2) After siRNA was transferred into mature dendritic cells, the expression level of CD80/CD86 mRNA and protein in siRNA group was significantly lower than other groups (all P < 0.05). (3) After siRNA transfection, the level of interferon-γ from the supernatant of mature dendritic cells and T cells co-culture system was significantly increased in the siRNA group compared with other groups (all P < 0.05), while interleukin-4 production in the siRNA group was significantly decreased (all P < 0.05). These findings suggest that high expression of CD80/CD86 on mature dendritic cells of asthmatic mice is observed, specific siRNA can effectively inhibit the expression of CD80/CD86, thus increasing interferon-γ production and decreasing interleukin-4 production, which contributes to regulate the Th1/Th2 imbalance.



中国组织工程研究
杂志出版内容重点:肾移植肝移植移植;心脏移植;组织移植;皮肤移植;皮瓣移植;血管移植;器官移植组织工程


全文链接:

Key words: dendritic cells, RNA, small interfering, antigens, surface, bone marrow, interferon-gamma, interleukin-4, asthma

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