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病理学与免疫反应性:理解肺结核的多维性

Pathology and immune reactivity: understanding multidimensionality in pulmonary tuberculosis.

作者信息

Dorhoi Anca, Kaufmann Stefan H E

机构信息

Department of Immunology, Max Planck Institute for Infection Biology, Charitéplatz 1, 10117, Berlin, Germany.

出版信息

Semin Immunopathol. 2016 Mar;38(2):153-66. doi: 10.1007/s00281-015-0531-3. Epub 2015 Oct 5.

Abstract

Heightened morbidity and mortality in pulmonary tuberculosis (TB) are consequences of complex disease processes triggered by the causative agent, Mycobacterium tuberculosis (Mtb). Mtb modulates inflammation at distinct stages of its intracellular life. Recognition and phagocytosis, replication in phagosomes and cytosol escape induce tightly regulated release of cytokines [including interleukin (IL)-1, tumor necrosis factor (TNF), IL-10], chemokines, lipid mediators, and type I interferons (IFN-I). Mtb occupies various lung lesions at sites of pathology. Bacteria are barely detectable at foci of lipid pneumonia or in perivascular/bronchiolar cuffs. However, abundant organisms are evident in caseating granulomas and at the cavity wall. Such lesions follow polar trajectories towards fibrosis, encapsulation and mineralization or liquefaction, extensive matrix destruction, and tissue injury. The outcome is determined by immune factors acting in concert. Gradients of cytokines and chemokines (CCR2, CXCR2, CXCR3/CXCR5 agonists; TNF/IL-10, IL-1/IFN-I), expression of activation/death markers on immune cells (TNF receptor 1, PD-1, IL-27 receptor) or abundance of enzymes [arginase-1, matrix metalloprotease (MMP)-1, MMP-8, MMP-9] drive genesis and progression of lesions. Distinct lesions coexist such that inflammation in TB encompasses a spectrum of tissue changes. A better understanding of the multidimensionality of immunopathology in TB will inform novel therapies against this pulmonary disease.

摘要

肺结核(TB)发病率和死亡率的升高是由病原体结核分枝杆菌(Mtb)引发的复杂疾病过程导致的后果。Mtb在其细胞内生命周期的不同阶段调节炎症反应。识别与吞噬、在吞噬体中复制以及胞质溶胶逃逸会诱导细胞因子[包括白细胞介素(IL)-1、肿瘤坏死因子(TNF)、IL-10]、趋化因子、脂质介质和I型干扰素(IFN-I)的严格调控释放。Mtb在病理部位占据各种肺部病变。在脂质性肺炎病灶或血管周围/细支气管袖套中几乎检测不到细菌。然而,在干酪样肉芽肿和空洞壁处有大量微生物。此类病变沿着极化轨迹发展为纤维化、包囊化和矿化或液化、广泛的基质破坏和组织损伤。结果由协同作用的免疫因素决定。细胞因子和趋化因子(CCR2、CXCR2、CXCR3/CXCR5激动剂;TNF/IL-10、IL-1/IFN-I)的梯度、免疫细胞上激活/死亡标志物(TNF受体1、PD-1、IL-27受体)的表达或酶[精氨酸酶-1、基质金属蛋白酶(MMP)-1、MMP-8、MMP-9]的丰度驱动病变的发生和发展。不同的病变共存,使得结核病中的炎症包括一系列组织变化。更好地理解结核病免疫病理学的多维度性将为针对这种肺部疾病的新疗法提供依据。

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