IL-18 Drives ILC3 Proliferation and Promotes IL-22 Production via NF-κB.
J Immunol
; 199(7): 2333-2342, 2017 10 01.
Article
em En
| MEDLINE
| ID: mdl-28842466
ABSTRACT
Group 3 innate lymphoid cells (ILC3s) are important regulators of the immune system, maintaining homeostasis in the presence of commensal bacteria, but activating immune defenses in response to microbial pathogens. ILC3s are a robust source of IL-22, a cytokine critical for stimulating the antimicrobial response. We sought to identify cytokines that can promote proliferation and induce or maintain IL-22 production by ILC3s and determine a molecular mechanism for this process. We identified IL-18 as a cytokine that cooperates with an ILC3 survival factor, IL-15, to induce proliferation of human ILC3s, as well as induce and maintain IL-22 production. To determine a mechanism of action, we examined the NF-κB pathway, which is activated by IL-18 signaling. We found that the NF-κB complex signaling component, p65, binds to the proximal region of the IL22 promoter and promotes transcriptional activity. Finally, we observed that CD11c+ dendritic cells expressing IL-18 are found in close proximity to ILC3s in human tonsils in situ. Therefore, we identify a new mechanism by which human ILC3s proliferate and produce IL-22, and identify NF-κB as a potential therapeutic target to be considered in pathologic states characterized by overproduction of IL-18 and/or IL-22.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Linfócitos
/
Transdução de Sinais
/
NF-kappa B
/
Interleucinas
/
Interleucina-18
/
Proliferação de Células
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
J Immunol
Ano de publicação:
2017
Tipo de documento:
Article