Immune characterization of the HBHA-specific response in Mycobacterium tuberculosis-infected patients with or without HIV infection.

Immune characterization of the HBHA-specific response in Mycobacterium tuberculosis-infected patients with or without HIV infection.
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HBHA特异性反应在结核病感染或不感染HIV的患者中的免疫表征。

DOI:
10.1371/journal.pone.0183846
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发表时间:
2017
期刊:
影响因子:
3.7
通讯作者:
Goletti D
Goletti D
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Chiacchio T;Delogu G;Vanini V;Cuzzi G;De Maio F;Pinnetti C;Sampaolesi A;Antinori A;Goletti D

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基于 RD1 的干扰素-γ 释放测定 (IGRA) 无法区分潜伏性和活动性结核病 (TB)。相反,结核感染受试者对基于肝素结合血凝素 (HBHA) 的 IGRA 的阳性反应与结核分枝杆菌 (Mtb) 遏制和结核病进展的低风险相关。本研究的目的是表征患有活动性结核病或潜伏性结核病感染 (LTBI) 的 HIV 感染者和未感染者的 HBHA 免疫反应。前瞻性招募了 49 名受试者:22 名 HIV 未感染者(13 名 TB,9 名 LTBI)和 27 名 HIV 感染者(12 名 HIV-TB,15 名 HIV-LTBI)。用 HBHA 和 RD1 抗原刺激全血和外周血单核细胞。通过 ELISA 评估干扰素 (IFN)γ 释放,通过流式细胞术评估细胞因子谱 [IFNγ、肿瘤坏死 (TNF)α、白细胞介素 (IL)2] 和表型(CD45RA、CCR7)。在 LTBI 个体中,HBHA 刺激诱导所有未感染 HIV 的人释放 IFNγ,而只有 4/15 的 HIV 感染者有反应。在活动性结核病中,只有 5/13 未感染 HIV 的患者和 1/12 HIV-TB 患者有反应。有趣的是,通过细胞计数,我们发现,与未感染 HIV 的受试者相比,患有 TB 或 LTBI 的 HIV 感染受试者中 CD4+ T 细胞对 HBHA 的反应显着受损。 HBHA 特异性 CD4 T 细胞的表型主要表现为中枢记忆 (CM) 和效应记忆 (EM) 表型,各组之间没有差异。不同的是,HBHA 特异性 CD8+ T 细胞在 LTBI 组中主要表现出 CM 和幼稚表型,而 TB、HIV-LTBI 和 HIV-TB 组则以 EM 或终末分化表型为特征。有趣的是,与 RD1 观察到的不同,通过细胞计数评估的 HBHA 特异性 T 细胞的细胞因子谱显示 CD4+ T 细胞大多是单功能的。相反,CD8 特异性 T 细胞对于 HBHA 和 RD1 刺激大多具有单一功能。这些结果表征了 HIV 感染对 LTBI 和 TB 患者中 HBHA 的 CD4 和 CD8 特异性反应的影响。 HIV 感染会损害 CD4 对 HBHA 的反应,这可能会导致结核病控制受损。
RD1-based Interferon-γ Release Assays (IGRAs) cannot distinguish latent from active tuberculosis (TB) disease. Conversely, a positive response to heparin-binding haemagglutinin (HBHA)-based IGRAs, among TB-infected subjects, correlates with Mycobacterium tuberculosis (Mtb) containment and low risk of TB progression. The aim of this study was to characterize HBHA-immune responses in HIV-infected and uninfected subjects with active TB or latent TB infection (LTBI). 49 subjects were prospectively enrolled: 22 HIV-uninfected (13 TB, 9 LTBI) and 27 HIV-infected (12 HIV-TB, 15 HIV-LTBI). Whole blood and peripheral blood mononuclear cells were stimulated with HBHA and RD1 antigens. Interferon (IFN)γ release was evaluated by ELISA whereas cytokine profile [IFNγ, tumor necrosis (TNF)α, interleukin (IL)2] and phenotype (CD45RA, CCR7) by flow cytometry. Among LTBI individuals, HBHA stimulation induced IFNγ release in all the HIV-uninfected, while, only 4/15 HIV-infected responded. Within the active TB, only 5/13 HIV-uninfected and 1/12 HIV-TB patients responded. Interestingly, by cytometry we showed that CD4+ T-cells response to HBHA was significantly impaired in the HIV-infected subjects with TB or LTBI compared to the HIV-uninfected subjects. The phenotype of HBHA-specific CD4 T-cells showed a predominantly central memory (CM) and effector memory (EM) phenotype without differences among the groups. Differently, HBHA-specific CD8+ T-cells, showed mainly a CM and naïve phenotype in LTBI group while TB, HIV-LTBI and HIV-TB groups were characterized by EM or terminally differentiated phenotypes. Interestingly, differently than what observed for RD1, the cytokine profile of HBHA-specific T-cells evaluated by cytometry showed that the CD4+ T-cells were mostly monofunctional. Conversely, CD8-specific T-cells were mostly monofunctional for both HBHA and RD1 stimulations. These results characterize the impact of HIV infection in CD4- and CD8-specific response to HBHA in both LTBI and TB patients. HIV infection impairs the CD4 response to HBHA and likely this may lead to an impairment of TB control.
DOI: 10.1038/nm.2299
发表时间: 2011-03
期刊: Nature medicine
影响因子: 82.9
作者:
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