Local amplifiers of IL-4Rα-mediated macrophage activation promote repair in lung and liver.
Local amplifiers of IL-4Rα-mediated macrophage activation promote repair in lung and liver.
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DOI:
10.1126/science.aaj2067
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发表时间:
2017-06-09
期刊:
影响因子:
--
通讯作者:
Allen JE
中科院分区:
文献类型:
--
作者:
Minutti CM;Jackson-Jones LH;García-Fojeda B;Knipper JA;Sutherland TE;Logan N;Ringqvist E;Guillamat-Prats R;Ferenbach DA;Artigas A;Stamme C;Chroneos ZC;Zaiss DM;Casals C;Allen JE
The type 2 immune response controls helminth infection and maintains tissue homeostasis but can lead to allergy and fibrosis when improperly controlled. We reveal the existence of local tissue-specific enhancers of type 2 mediated-macrophage activation. In the lung, surfactant protein A (SP-A) enhanced IL-4-dependent proliferation and activation of alveolar macrophages, accelerating parasite clearance and reducing pulmonary injury following infection with a lung-migrating helminth. In the peritoneal cavity and liver, C1q enhancement of type 2 macrophage activation was required for liver repair following bacterial infection, but resulted in tissue fibrosis following peritoneal dialysis. Both SP-A and C1q generated their effects on macrophages via the unconventional myosin18A that acts as a cell surface receptor. We conclude that the structurally related defense collagens SP-A and C1q are tissue-specific factors that act through myosin18A to license local type 2 responses with consequences for parasite control, tissue repair, and fibrosis.
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