Cutting Edge: Neutrophils License the Maturation of Monocytes into Effective Antifungal Effectors.

Cutting Edge: Neutrophils License the Maturation of Monocytes into Effective Antifungal Effectors.
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DOI:
10.4049/jimmunol.2200430
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发表时间:
2022-11-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Rivera A
Rivera A
中科院分区:
其他
文献类型:
--
作者:
Espinosa V;Dutta O;Heung LJ;Wang K;Chang YJ;Soteropoulos P;Hohl TM;Siracusa MC;Rivera A

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Neutrophils are critical for the direct eradication of Aspergillus fumigatus conidia, but whether they mediate antifungal defense beyond their role as effectors is unclear. Here, we demonstrate that neutrophil depletion impairs the activation of protective antifungal CCR2+ inflammatory monocytes. In the absence of neutrophils, monocytes displayed limited differentiation into monocyte-derived-DCs (Mo-DC), reduced formation of reactive oxygen species (ROS), and diminished conidiacidal activity. Upstream regulator analysis of the transcriptional response in monocytes predicted a loss of STAT1-dependent signals as the potential basis for the dysfunction seen in neutrophil-depleted mice. We find that conditional removal of STAT1 on CCR2+ cells results in diminished antifungal monocyte responses while exogenous administration of IFN-γ to neutrophil-depleted mice restores Mo-DC maturation and ROS production. Altogether, our findings support a critical role for neutrophils in antifungal immunity not only as effectors but also as important contributors to antifungal monocyte activation, in part by regulating STAT1-dependent functions.
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