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- Title
Characterization of the Anti-Inflammatory Capacity of IL-10-Producing Neutrophils in Response to Streptococcus pneumoniae Infection.
- Authors
González, Liliana A.; Melo-González, Felipe; Sebastián, Valentina P.; Vallejos, Omar P.; Noguera, Loreani P.; Suazo, Isidora D.; Schultz, Bárbara M.; Manosalva, Andrés H.; Peñaloza, Hernán F.; Soto, Jorge A.; Parker, Dane; Riedel, Claudia A.; González, Pablo A.; Kalergis, Alexis M.; Bueno, Susan M.
- Abstract
Neutrophils are immune cells classically defined as pro-inflammatory effector cells. However, current accumulated evidence indicates that neutrophils have more versatile immune-modulating properties. During acute lung infection with Streptococcus pneumoniae in mice, interleukin-10 (IL-10) production is required to temper an excessive lung injury and to improve survival, yet the cellular source of IL-10 and the immunomodulatory role of neutrophils during S. pneumoniae infection remain unknown. Here we show that neutrophils are the main myeloid cells that produce IL-10 in the lungs during the first 48 h of infection. Importantly, in vitro assays with bone-marrow derived neutrophils confirmed that IL-10 can be induced by these cells by the direct recognition of pneumococcal antigens. In vivo , we identified the recruitment of two neutrophil subpopulations in the lungs following infection, which exhibited clear morphological differences and a distinctive profile of IL-10 production at 48 h post-infection. Furthermore, adoptive transfer of neutrophils from WT mice into IL-10 knockout mice (Il10-/-) fully restored IL-10 production in the lungs and reduced lung histopathology. These results suggest that IL-10 production by neutrophils induced by S. pneumoniae limits lung injury and is important to mediate an effective immune response required for host survival.
- Subjects
MYELOID cells; STREPTOCOCCUS pneumoniae; NEUTROPHILS; CELLULAR recognition
- Publication
Frontiers in Immunology, 2021, Vol 11, pN.PAG
- ISSN
1664-3224
- Publication type
Article
- DOI
10.3389/fimmu.2021.638917