Pulmonary IFN-γ Causes Lymphocytic Inflammation and Cough Hypersensitivity by Increasing the Number of IFN-γ-Secreting T Lymphocytes.

Pulmonary IFN-γ Causes Lymphocytic Inflammation and Cough Hypersensitivity by Increasing the Number of IFN-γ-Secreting T Lymphocytes.
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DOI:
10.4168/aair.2022.14.6.653
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发表时间:
2022-11
期刊:
Allergy, asthma & immunology research
影响因子:
--
通讯作者:
Lai K
Lai K
中科院分区:
其他
文献类型:
--
作者:
Deng Z;Ding W;Li F;Shen S;Huang C;Lai K

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呼吸道病毒感染会增加肺内 T 淋巴细胞的数量,从而通过产生干扰素 γ (IFN-γ) 来增强咳嗽敏感性。目前尚不清楚为什么呼吸道病毒被清除后,分泌 IFN-γ 的 T 淋巴细胞仍能长期存在。采用重复肺部给予IFN-γ和腹腔注射不同抑制剂来研究肺部IFN-γ对小鼠和豚鼠的影响。 IFN-γ给药引起肺和血液中分泌IFN-γ的T淋巴细胞增加,进而导致肺中IFN-γ生理水平升高、气道炎症和气道上皮损伤。 IFN-γ给药还增强了豚鼠的咳嗽敏感性。 IFN-γ 激活肺组织中的 STAT1 和细胞外信号调节激酶 (ERK) 通路,释放 IFN-γ 诱导蛋白 10 (IP-10),并导致肺驻留淋巴细胞中 F-肌动蛋白积累。 CXC 趋化因子受体 3 (CXCR3) 抑制剂可有效抑制所有 IFN-γ 诱导的炎症变化。 STAT1抑制剂通过抑制T淋巴细胞增殖来减轻分泌IFN-γ的T淋巴细胞浸润。 F-肌动蛋白积累和 ERK1/2 通路导致肺部 IFN-γ 诱导的气道炎症加剧和血液中 IFN-γ 分泌 T 淋巴细胞的增加。肺部高生理水平的 IFN-γ 可能通过 IP-10 和 CXCR3 途径增加分泌 IFN-γ 的 T 淋巴细胞数量,从而导致肺部淋巴细胞炎症和咳嗽过敏。
Respiratory viral infection increases the number of lung-resident T lymphocytes, which enhance cough sensitivity by producing interferon-γ (IFN-γ). It is poorly understood why IFN-γ-secreting T lymphocytes persist for a long time when the respiratory viruses have been removed. Repeated pulmonary administration of IFN-γ and intraperitoneal injection with different inhibitors were used to study the effects of pulmonary IFN-γ in mice and guinea pigs. IFN-γ administration caused the increasing of IFN-γ-secreting T lymphocytes in both lung and blood, followed by the elevated physiological level of IFN-γ in the lung, the airway inflammation and the airway epithelial damage. IFN-γ administration also enhanced the cough sensitivity of guinea pigs. IFN-γ activated the STAT1 and extracellular signal-regulated kinase (ERK) pathways in lung tissues, released IFN-γ-inducible protein 10 (IP-10), and resulted in F-actin accumulation in lung-resident lymphocytes. The CXC chemokine receptor 3 (CXCR3) inhibitor potently suppressed all the IFN-γ-induced inflammatory changes. The STAT1 inhibitor mitigated IFN-γ-secreting T lymphocytes infiltration by inhibiting T lymphocytes proliferation. F-actin accumulation and the ERK1/2 pathway contributed to pulmonary IFN-γ-induced augmentation of the airway inflammation and increasing of IFN-γ-secreting T lymphocytes in blood. High physiological levels of IFN-γ in the lung may cause pulmonary lymphocytic inflammation and cough hypersensitivity by increasing the number of IFN-γ-secreting T lymphocytes through the IP-10 and CXCR3 pathways.
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