Identification of differentially recognized T cell epitopes in the spectrum of tuberculosis infection.

Identification of differentially recognized T cell epitopes in the spectrum of tuberculosis infection.
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DOI:
10.1038/s41467-024-45058-9
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发表时间:
2024-01-26
影响因子:
16.6
通讯作者:
Lindestam Arlehamn, Cecilia S.
Lindestam Arlehamn, Cecilia S.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Panda, Sudhasini;Morgan, Jeffrey;Cheng, Catherine;Saito, Mayuko;Gilman, Robert H.;Ciobanu, Nelly;Crudu, Valeriu;Catanzaro, Donald G.;Catanzaro, Antonino;Rodwell, Timothy;Perera, Judy S. B.;Chathuranga, Teshan;Gunasena, Bandu;Desilva, Aruna D.;Peters, Bjoern;Sette, Alessandro;Lindestam Arlehamn, Cecilia S.

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对于哪种结核分枝杆菌(Mtb)抗原可以在感染的不同阶段触发不同的T细胞应答,仍然存在不完整的知识。在此,对21名活动性结核病(ATB)治疗中期患者的20,610种Mtb衍生肽进行蛋白质组范围筛选,揭示了针对137个独特表位的IFNγ特异性T细胞应答。其中,16%被两个或多个参与者识别,主要来自细胞壁和细胞过程抗原。ATB参与者和干扰素-γ释放试验(IGRA + /−)个体之间对抗原(包括TB疫苗候选抗原)的识别存在差异。我们开发了ATB特异性肽池(ATB 116),由ATB参与者唯一识别的表位组成。该样本库可以区分来自不同地理位置的肺ATB患者和IGRA + /−个体,灵敏度超过60%,特异性超过80%。这种T细胞反应性的蛋白质组范围的筛选鉴定了感染阶段特异性表位和抗原,用于诊断和测量Mtb特异性免疫应答的潜在用途。T细胞在结核病的免疫病理学中起关键作用。在这里,作者在感染的不同阶段对T细胞抗原和对结核分枝杆菌的反应性进行了蛋白质组范围的筛选。
There is still incomplete knowledge of which Mycobacterium tuberculosis (Mtb) antigens can trigger distinct T cell responses at different stages of infection. Here, a proteome-wide screen of 20,610 Mtb-derived peptides in 21 patients mid-treatment for active tuberculosis (ATB) reveals IFNγ-specific T cell responses against 137 unique epitopes. Of these, 16% are recognized by two or more participants and predominantly derived from cell wall and cell processes antigens. There is differential recognition of antigens, including TB vaccine candidate antigens, between ATB participants and interferon-gamma release assay (IGRA + /−) individuals. We developed an ATB-specific peptide pool (ATB116) consisting of epitopes exclusively recognized by ATB participants. This pool can distinguish patients with pulmonary ATB from IGRA + /− individuals from various geographical locations, with a sensitivity of over 60% and a specificity exceeding 80%. This proteome-wide screen of T cell reactivity identified infection stage-specific epitopes and antigens for potential use in diagnostics and measuring Mtb-specific immune responses. T cells play critical roles in the immune pathology of tuberculosis. Here the authors perform a proteome-wide screen of T cell antigens and reactivity to mycobacterium tuberculosis at different stages of infection.
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