IL-1α、IL-1β 和 TNF 对宿主抗结核分枝杆菌和减毒牛分枝杆菌的反应的相对贡献。

Relative contribution of IL-1α, IL-1β and TNF to the host response to Mycobacterium tuberculosis and attenuated M. bovis BCG.

机构信息

CNRS, UMR7355 Orleans, France ; University of Orleans, Experimental and Molecular Immunology and Neurogenetics Orleans, France.

Department of Pathology and Immunology, University of Geneva Medical School Geneva, Switzerland.

出版信息

Immun Inflamm Dis. 2013 Oct;1(1):47-62. doi: 10.1002/iid3.9. Epub 2013 Oct 30.

Abstract

TNF and IL-1 are major mediators involved in severe inflammatory diseases against which therapeutic neutralizing antibodies are developed. However, both TNF and IL-1 receptor pathways are essential for the control of Mycobacterium tuberculosis infection, and it is critical to assess the respective role of IL-1α, IL-1β, and TNF. Using gene-targeted mice we show that absence of both IL-1α and IL-1β recapitulates the uncontrolled M. tuberculosis infection with increased bacterial burden, exacerbated lung inflammation, high IFNγ, reduced IL-23 p19 and rapid death seen in IL-1R1-deficient mice. However, presence of either IL-1α or IL-1β in single-deficient mice is sufficient to control acute M. tuberculosis infection, with restrained bacterial burden and lung pathology, in conditions where TNF deficient mice succumbed within 4 weeks with overwhelming infection. Systemic infection by attenuated M. bovis BCG was controlled in the absence of functional IL-1 pathway, but not in the absence of TNF. Therefore, although both IL-1α and IL-1β are required for a full host response to virulent M. tuberculosis, the presence of either IL-1α or IL-1β allows some control of acute M. tuberculosis infection, and IL-1 pathway is dispensable for controlling M. bovis BCG acute infection. This is in sharp contrast with TNF, which is essential for host response to both attenuated and virulent mycobacteria and may have implications for anti-inflammatory therapy with IL-1β neutralizing antibodies.

摘要

TNF 和 IL-1 是参与严重炎症性疾病的主要介质,针对这些疾病开发了治疗性中和抗体。然而,TNF 和 IL-1 受体途径对于控制结核分枝杆菌感染都是必不可少的,评估 IL-1α、IL-1β 和 TNF 的各自作用至关重要。使用基因靶向小鼠,我们表明,缺乏 IL-1α 和 IL-1β 会重现不受控制的结核分枝杆菌感染,细菌负荷增加,肺部炎症加剧,IFNγ 升高,IL-23 p19 减少,IL-1R1 缺陷小鼠迅速死亡。然而,在单缺陷小鼠中存在任一 IL-1α 或 IL-1β 足以控制急性结核分枝杆菌感染,细菌负荷和肺部病理学受到限制,而 TNF 缺陷小鼠在 4 周内因感染过重而死亡。在缺乏功能性 IL-1 途径的情况下,减毒牛分枝杆菌的全身感染得到控制,但在缺乏 TNF 的情况下则不行。因此,尽管 IL-1α 和 IL-1β 对于宿主对毒力结核分枝杆菌的完全反应都是必需的,但 IL-1α 或 IL-1β 的存在允许对急性结核分枝杆菌感染进行一些控制,并且 IL-1 途径对于控制牛分枝杆菌 BCG 急性感染是可有可无的。这与 TNF 形成鲜明对比,TNF 对于宿主对减毒和毒力分枝杆菌的反应都是必需的,并且可能对使用 IL-1β 中和抗体进行抗炎治疗具有重要意义。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/954c/4217540/c5efbcc842f9/iid30001-0047-f1.jpg

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