IL-4-Secreting NKT Cells Prevent Hypersensitivity Pneumonitis by Suppressing IFN-γ-Producing Neutrophils1

IL-4-Secreting NKT Cells Prevent Hypersensitivity Pneumonitis by Suppressing IFN-γ-Producing Neutrophils1
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分泌 IL-4 的 NKT 细胞通过抑制产生 IFN-γ 的中性粒细胞来预防过敏性肺炎1

DOI:
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发表时间:
2006
影响因子:
4.4
通讯作者:
D. Chung
D. Chung
中科院分区:
医学2区
文献类型:
--
作者:
S. Hwang;Sanghee Kim;W. Park;D. Chung

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过敏性肺炎(HP)是由Th 1免疫应答介导的。NKT细胞通过调节Th 1/Th 2平衡来调节免疫应答。因此,我们推测NKT细胞通过调节Th 1/Th 2应答在HP的发展中起关键作用。为了解决这个问题,我们探讨了NKT细胞在直枝多孢菌(SR)诱导的HP中的功能作用。在CD 1d −/−小鼠中,HP在组织学变化、羟脯氨酸水平、支气管肺泡灌洗液中的CD 4:CD 8比率和SR特异性免疫应答方面比对照小鼠更差。CD 1d −/−小鼠在HP期间肺中IFN-γ的产生增加,这主要是由Gr-1+中性粒细胞产生的。阻断IFN-γ可使HP减弱,而rIFN-γ可使HP加重,并且在HP过程中,Gr-1+中性粒细胞的耗竭减少了支气管肺泡灌洗液中的CD 8 + T细胞数量。IL-4−/−小鼠NKT细胞的过继转移没有减弱HP,而野生型或IFN-γ−/−小鼠NKT细胞抑制HP。总之,产生IL-4的NKT细胞通过抑制产生IFN-γ的中性粒细胞(诱导肺中CD 8 + T细胞的活化和增殖),在SR诱导的HP中发挥保护作用。
Hypersensitivity pneumonitis (HP) is mediated by Th1 immune response. NKT cells regulate immune responses by modulating the Th1/Th2 balance. Therefore, we postulated that NKT cells play a critical role in the development of the HP by modulating the Th1/Th2 response. To address this issue, we explored the functional roles of NKT cells in Saccharopolyspora rectivirgula (SR)-induced HP. In CD1d−/− mice, the HP was worse in terms of histological changes, hydroxyproline levels, the CD4:CD8 ratio in bronchoalveolar lavage fluid, and SR-specific immune responses than in control mice. CD1d−/− mice showed elevated IFN-γ production in the lung during the HP, and this was produced mainly by Gr-1+ neutrophils. The blockade of IFN-γ in CD1d−/− mice attenuated the HP, whereas the injection of rIFN-γ aggravated it. Moreover, the depletion of Gr-1+ neutrophils reduced CD8+ T cell numbers in bronchoalveolar lavage fluid during the HP. The adoptive transfer of IL-4−/− mouse NKT cells did not attenuate the HP, whereas wild-type or IFN-γ−/− mouse NKT cells suppressed the HP. In conclusion, NKT cells producing IL-4 play a protective role in SR-induced HP by suppressing IFN-γ-producing neutrophils, which induce the activation and proliferation of CD8+ T cells in the lung.
DOI: 10.1016/s1074-7613(00)80290-3
发表时间: 1997-04-01
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影响因子: 32.4
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发表时间: 1998-11-01
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