Abstract:
:Despite the prevalence and clinical importance of influenza, its long-term effect on lung immunity is unclear. Here we describe that following viral clearance and clinical recovery, at 1 month after infection with influenza, mice are better protected from Streptococcus pneumoniae infection due to a population of monocyte-derived alveolar macrophages (AMs) that produce increased interleukin-6. Influenza-induced monocyte-derived AMs have a surface phenotype similar to resident AMs but display a unique functional, transcriptional and epigenetic profile that is distinct from resident AMs. In contrast, influenza-experienced resident AMs remain largely similar to naive AMs. Thus, influenza changes the composition of the AM population to provide prolonged antibacterial protection. Monocyte-derived AMs persist over time but lose their protective profile. Our results help to understand how transient respiratory infections, a common occurrence in human life, can constantly alter lung immunity by contributing monocyte-derived, recruited cells to the AM population.
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Aegerter H,Kulikauskaite J,Crotta S,Patel H,Kelly G,Hessel EM,Mack M,Beinke S,Wack Adoi
10.1038/s41590-019-0568-xsubject
Has Abstractpub_date
2020-02-01 00:00:00pages
145-157issue
2eissn
1529-2908issn
1529-2916pii
10.1038/s41590-019-0568-xjournal_volume
21pub_type
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