ILC3s integrate glycolysis and mitochondrial production of reactive oxygen species to fulfill activation demands.
J Exp Med
; 216(10): 2231-2241, 2019 10 07.
Article
em En
| MEDLINE
| ID: mdl-31296736
ABSTRACT
Group 3 innate lymphoid cells (ILC3s) are the innate counterparts of Th17 that require the transcription factor RORγt for development and contribute to the defense against pathogens through IL-22 and IL-17 secretion. Proliferation and effector functions of Th17 require a specific mTOR-dependent metabolic program that utilizes high-rate glycolysis, while mitochondrial lipid oxidation and production of reactive oxygen species (mROS) support alternative T reg cell differentiation. Whether ILC3s employ a specific metabolic program is not known. Here, we find that ILC3s rely on mTOR complex 1 (mTORC1) for proliferation and production of IL-22 and IL-17A after in vitro activation and Citrobacter rodentium infection. mTORC1 induces activation of HIF1α, which reprograms ILC3 metabolism toward glycolysis and sustained expression of RORγt. However, in contrast to Th17, ILC3 activation requires mROS production; rather than inducing an alternative regulatory fate as it does in CD4 T cells, mROS stabilizes HIF1α and RORγt in ILC3s and thereby promotes their activation. We conclude that ILC3 activation relies on a metabolic program that integrates glycolysis with mROS production.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ativação Linfocitária
/
Espécies Reativas de Oxigênio
/
Citrobacter rodentium
/
Infecções por Enterobacteriaceae
/
Células Th17
/
Glicólise
/
Mitocôndrias
Limite:
Animals
Idioma:
En
Revista:
J Exp Med
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Macau