IL-10-producing NK cells exacerbate sublethal Streptococcus pneumoniae infection in the lung.
IL-10-producing NK cells exacerbate sublethal Streptococcus pneumoniae infection in the lung.
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DOI:
10.1016/j.trsl.2020.07.001
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发表时间:
2020-12
期刊:
影响因子:
--
通讯作者:
Lenz LL
中科院分区:
文献类型:
--
作者:
Clark SE;Schmidt RL;Aguilera ER;Lenz LL
Lung inflammation is tightly controlled to balance microbial clearance with the tissue damage that accompanies this response. Bacterial pathogens including Streptococcus pneumoniae modulate immune regulation by promoting secretion of the anti-inflammatory cytokine IL-10. The important cellular sources of IL-10 that impact protection against different bacterial infections are not well characterized. We find that S. pneumoniae activates IL-10 secretion from natural killer (NK) cells in the lung, which restrict host protection in a mouse model of sublethal infection. Direct transfer of wild-type NK cells into the lungs of IL-10-deficient mice drives bacterial expansion, identifying NK cells as a critical source of IL-10 promoting S. pneumoniae infection. The S. pneumoniae virulence protein Spr1875 was found to elicit NK cell IL-10 production in purified cells and in the lungs of live animals. These findings reveal therapeutic targets to combat bacterial-driven immune regulation in the lung.
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