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Innate lymphoid cells promote lung-tissue homeostasis after infection with influenza virus
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Innate lymphoid cells promote lung-tissue homeostasis after infection with influenza virus
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Journal Article
Innate lymphoid cells promote lung-tissue homeostasis after infection with influenza virus
2011
Overview
Cytokine-producing innate lymphoid cells are found at mucosal surfaces. Artis and Wherry and their colleagues show that innate 'nuocyte-like' cells accumulate in virus-infected lungs and contribute to the repair of tissues.
Innate lymphoid cells (ILCs), a heterogeneous cell population, are critical in orchestrating immunity and inflammation in the intestine, but whether ILCs influence immune responses or tissue homeostasis at other mucosal sites remains poorly characterized. Here we identify a population of lung-resident ILCs in mice and humans that expressed the alloantigen Thy-1 (CD90), interleukin 2 (IL-2) receptor α-chain (CD25), IL-7 receptor α-chain (CD127) and the IL-33 receptor subunit T1-ST2. Notably, mouse ILCs accumulated in the lung after infection with influenza virus, and depletion of ILCs resulted in loss of airway epithelial integrity, diminished lung function and impaired airway remodeling. These defects were restored by administration of the lung ILC product amphiregulin. Collectively, our results demonstrate a critical role for lung ILCs in restoring airway epithelial integrity and tissue homeostasis after infection with influenza virus.
