Fas-activated serine/threonine phosphoprotein promotes immune-mediated pulmonary inflammation.

Fas-activated serine/threonine phosphoprotein promotes immune-mediated pulmonary inflammation.
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DOI:
10.4049/jimmunol.1000104
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发表时间:
2010-05-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Anderson P
Anderson P
中科院分区:
其他
文献类型:
--
作者:
Simarro M;Giannattasio G;De la Fuente MA;Benarafa C;Subramanian KK;Ishizawar R;Balestrieri B;Andersson EM;Luo HR;Orduña A;Boyce J;Anderson P

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我们已经产生了Fas激活的丝氨酸苏氨酸磷蛋白缺陷型小鼠(FAST-/-),以研究FAST在免疫系统功能中的体内作用。在屋尘螨(HDM)诱导的过敏性肺部炎症模型中,野生型小鼠出现由嗜酸性粒细胞、淋巴细胞和中性粒细胞组成的混合细胞浸润。FAST−/−小鼠发生气道炎症,其特征在于几乎不存在中性粒细胞。同样,与野生型对照组相比,FAST−/−小鼠中LPS诱导的肺泡中性粒细胞募集显著减少。这伴随着支气管肺泡灌洗液中细胞因子(TNF-α、IL-6和IL-23)和化学引诱物(MIP-2和KC)浓度降低。由于FAST−/−中性粒细胞表现出正常的趋化性和存活,中性粒细胞募集受损可能是由于肺实质内趋化因子的产生减少。使用骨髓嵌合体的研究表明,肺驻留造血细胞(如肺树突状细胞和/或肺泡巨噬细胞)在这一过程中。总之,我们的研究结果介绍FAST作为一种促炎因子,调节肺驻留造血细胞的功能,以促进中性粒细胞募集和肺部炎症。
We have generated Fas activated serine threonine phosphoprotein-deficient mice (FAST−/−) to study the in vivo role of FAST in immune system function. In a model of house dust mite (HDM)-induced allergic pulmonary inflammation, wild type mice develop a mixed cellular infiltrate composed of eosinophils, lymphocytes and neutrophils. FAST−/− mice develop airway inflammation that is distinguished by the near absence of neutrophils. Similarly, LPS-induced alveolar neutrophil recruitment is markedly reduced in FAST−/− mice compared to wild type controls. This is accompanied by reduced concentrations of cytokines (TNF-α, IL-6 and IL-23) and chemoattractants (MIP-2 and KC) in bronchoalveolar lavage fluids. As FAST−/− neutrophils exhibit normal chemotaxis and survival, impaired neutrophil recruitment is likely to be due to reduced production of chemoattractants within the pulmonary parenchyma. Studies using bone marrow chimeras implicate lung resident hematopoietic cells (e.g. pulmonary dendritic cells and/or alveolar macrophages) in this process. In conclusion, our results introduce FAST as a pro-inflammatory factor that modulates the function of lung resident hematopoietic cells to promote neutrophil recruitment and pulmonary inflammation.
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