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Natural Killer-like B Cells Prime Innate Lymphocytes against Microbial Infection

机译:自然杀手样B细胞引发针对微生物感染的先天淋巴细胞。

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Natural killer (NK) cells and non-cytotoxic interferon-gamma (IFN-gamma)-producing group I innate lymphoid cells (ILC1s) produce large amounts of IFN-gamma and cause activation of innate and adaptive immunity. However, how NKs and ILC1s are primed during infection remains elusive. Here we have shown that a lymphocyte subpopulation natural killer-like B (NKB) cells existed in spleen and mesenteric lymph nodes (MLNs). NKBs had unique features that differed from T and B cells, and produced interleukin-18 (IL-18) and IL-12 at an early phase of infection. NKB cells played a critical role in eradication of microbial infection via secretion of IL-18 and IL-12. Moreover, IL-18 deficiency abrogated the antibacterial effect of NKBs. Upon bacterial challenge, NKB precursors (NKBPs) rapidly differentiated to NKBs that activated NKs and ILC1s against microbial infection. Our findings suggest that NKBs might be exploited to develop effective therapies for treatment of infectious diseases.
机译:天然杀伤(NK)细胞和产生非细胞毒性干扰素-γ(IFN-γ)的I类先天淋巴样细胞(ILC1s)产生大量IFN-γ,并引起先天性和适应性免疫的激活。但是,如何在感染过程中引发NK和ILC1尚不清楚。在这里,我们显示了脾和肠系膜淋巴结(MLN)中存在淋巴细胞亚群的自然杀手样B(NKB)细胞。 NKB具有与T细胞和B细胞不同的独特特征,并在感染的早期产生白介素18(IL-18)和IL-12。 NKB细胞通过分泌IL-18和IL-12在根除微生物感染中起关键作用。此外,IL-18缺乏消除了NKBs的抗菌作用。受到细菌攻击后,NKB前体(NKBP)迅速分化为激活NK和ILC1抵抗微生物感染的NKB。我们的发现表明,可以利用NKB来开发有效的疗法来治疗传染病。

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