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• 基础研究 • 上一篇    下一篇

结核分枝杆菌诱导巨噬细胞产生的条件培养基对γ-干扰素信号转导系统的抑制作用

王 珂1,李然伟2, 顾莲芝3,马忠森1*   

  1. 1. 吉林大学第二医院呼吸内科, 吉林 长春130041; 2. 吉林大学第二医院泌尿外科, 吉林 长春130041;3. 吉林大学第二医院血液内科, 吉林 长春130041
  • 收稿日期:2005-04-20 修回日期:1900-01-01 出版日期:2006-01-28 发布日期:2006-01-28
  • 通讯作者: 马忠森

Inhibitory effect of Mycobacterium tuberculosis induced condition medium on macrophage response to IFN-γ

WANG Ke1, LI Ran-wei2, GU Lian-zhi3, MA Zhong-sen1*   

  1. 1. Department of Respiratory Medicine, Second Hospital, Jilin University, Changchun 130041, China; 2. Department of Urinary Surgery, Second Hospital, Jilin University,Changchun 130041, China; 3. Department of Hematology, Second Hospital, Jilin University,Changchun 130041, China
  • Received:2005-04-20 Revised:1900-01-01 Online:2006-01-28 Published:2006-01-28
  • Contact: MA Zhong-sen

摘要: 目的:探讨结核分枝杆菌对γ-干扰素 (IFN-γ)信号转导的作用。方法:体外分离及培养人和鼠类巨噬细胞,感染结核分枝杆菌并收集条件培养基( Mtb-CM) ;流式细胞仪测定Mtb-CM对人及鼠巨噬细胞的表面标志FcγRI(CD64)和组织相容性Ⅱ类分子(MHC Ⅱ)的表达。结果:与Mtb-CM共同培养的人巨噬细胞FcγRI的表达明显低于未加Mtb-CM的对照组(P<0.05);同样,与Mtb-CM共同培养的鼠巨噬细胞MHCⅡ的表达亦明显低于对照组(P<0.05);加入抗IL-6抗体的Mtb-CM可使巨噬细胞对IFN-γ的应答反应提高,其表面标志的表达 明显高于未加IL-6抗体的对照组(P<0.05)。结论:结核分枝杆菌诱导巨噬细胞产生的Mtb-CM可抑制由IFN-γ介导的巨噬细胞表面标志的表达; Mtb-CM中所含的刺激因子可能为IL-6,揭示了IL-6在结核菌感染中的新作用。

关键词: 结核, 巨噬细胞, 干扰素Ⅱ型, 白细胞介素

Abstract: Objective Objective To study the effect of Mycobacterium tuberculosis (Mtb) on IFN-γ signaling pathway in macrophages. Methods Humans and mice macrophages were isolated and infected by Mtb, condition medium were collected after a few days culture; Macrophage surface expression of FcγRI (human) or MHC Ⅱ (mouse) was measured by flow cytometry to explore the effect of condition medium on macrophage response to IFN-γ. Results Surface expression of FcγRI in human macrophages cultured in condition medium was significantly decreased compared to those without condition medium (P<0.05); Similarly, surface expression of MHC Ⅱ in mouse macro phages cultured in the condition medium was significantly decreased compared to those without condition medium (P<0.05); Condition medium cultured with ant i IL-6 antibody improved macrophage response to IFN-γ; Surface expression of MHC Ⅱ in mouse macrophages cultured in condition medium with anti IL-6 antibody was significantly increased compared to those cultured in condition medium alone (P<0.05).   Conclusion Mtb induced condition medium can inhibit macrophage surface expression of FcγRI or MHC initiated by IFN-γ;At meanwhile, the results also show that IL-6 may play an important role in condition medium which c an inhibits macrophage response to IFN-γ, and indicate that IL-6 may have a novel function in the Mtb infection.

Key words: macrophages, IFN type Ⅱ, interleukin-6

中图分类号: 

  • Q939.131