Article ; Online: Regulation of pulmonary plasma cell responses during secondary infection with influenza virus.
The Journal of experimental medicine
2024 Volume 221, Issue 7
Abstract: During secondary infection with influenza virus, plasma cells (PCs) develop within the lung, providing a local source of antibodies. However, the site and mechanisms that regulate this process are poorly defined. Here, we show that while circulating ... ...
Abstract | During secondary infection with influenza virus, plasma cells (PCs) develop within the lung, providing a local source of antibodies. However, the site and mechanisms that regulate this process are poorly defined. Here, we show that while circulating memory B cells entered the lung during rechallenge and were activated within inducible bronchus-associated lymphoid tissues (iBALTs), resident memory B (BRM) cells responded earlier, and their activation occurred in a different niche: directly near infected alveoli. This process required NK cells but was largely independent of CD4 and CD8 T cells. Innate stimuli induced by virus-like particles containing ssRNA triggered BRM cell differentiation in the absence of cognate antigen, suggesting a low threshold of activation. In contrast, expansion of PCs in iBALTs took longer to develop and was critically dependent on CD4 T cells. Our work demonstrates that spatially distinct mechanisms evolved to support pulmonary secondary PC responses, and it reveals a specialized function for BRM cells as guardians of the alveoli. |
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MeSH term(s) | Animals ; Plasma Cells/immunology ; Orthomyxoviridae Infections/immunology ; Orthomyxoviridae Infections/virology ; Lung/immunology ; Lung/virology ; Lung/pathology ; Mice ; CD4-Positive T-Lymphocytes/immunology ; Mice, Inbred C57BL ; Killer Cells, Natural/immunology ; CD8-Positive T-Lymphocytes/immunology ; Cell Differentiation/immunology ; Memory B Cells/immunology ; Lymphocyte Activation/immunology ; Orthomyxoviridae/immunology ; Orthomyxoviridae/physiology |
Language | English |
Publishing date | 2024-04-25 |
Publishing country | United States |
Document type | Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural |
ZDB-ID | 218343-2 |
ISSN | 1540-9538 ; 0022-1007 |
ISSN (online) | 1540-9538 |
ISSN | 0022-1007 |
DOI | 10.1084/jem.20232014 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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