Transcriptomics

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γδ T cells orchestrate the induction of protective type 2 immunity in neonatal influenza infection


ABSTRACT: Influenza infection causes high rates of hospitalization and mortality in infants. γδ T cells are critical for immune responses against pathogens as regulators and effectors, especially in infants, and yet the roles of neonatal γδ T cells in influenza remain to be investigated. Here we report that γδ T cells were protective against mortality associated with neonatal influenza infection. Infection induced the accumulation and activation of γδ T cells, which transiently expressed IL-17a to enhance early IL-33 production by lung epithelial cells via STAT3 phosphorylation. Subsequently, this led to type 2 immune responses with elicited infiltration of ILC2s and Tregs resulting in increased amphiregulin secretion and tissue repair. Loss of γδ T cells did not alter viral clearance or IFN-γ production. Thus, our results identify a specific requirement for γδ T cells in influenza-infected neonates by initiating type 2 immune responses, mediating tissue homeostasis, and promoting lung integrity.

ORGANISM(S): Mus musculus

PROVIDER: GSE99683 | GEO | 2018/06/20

REPOSITORIES: GEO

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