The Vaccine Adjuvant Chitosan Promotes Cellular Immunity via DNA Sensor cGAS-STING-Dependent Induction of Type I Interferons.
Immunity
; 44(3): 597-608, 2016 Mar 15.
Article
em En
| MEDLINE
| ID: mdl-26944200
ABSTRACT
The cationic polysaccharide chitosan is an attractive candidate adjuvant capable of driving potent cell-mediated immunity, but the mechanism by which it acts is not clear. We show that chitosan promotes dendritic cell maturation by inducing type I interferons (IFNs) and enhances antigen-specific T helper 1 (Th1) responses in a type I IFN receptor-dependent manner. The induction of type I IFNs, IFN-stimulated genes and dendritic cell maturation by chitosan required the cytoplasmic DNA sensor cGAS and STING, implicating this pathway in dendritic cell activation. Additionally, this process was dependent on mitochondrial reactive oxygen species and the presence of cytoplasmic DNA. Chitosan-mediated enhancement of antigen specific Th1 and immunoglobulin G2c responses following vaccination was dependent on both cGAS and STING. These findings demonstrate that a cationic polymer can engage the STING-cGAS pathway to trigger innate and adaptive immune responses.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Células Dendríticas
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Adjuvantes Imunológicos
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Células Th1
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Quitosana
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Proteínas de Membrana
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Mitocôndrias
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Nucleotidiltransferases
Limite:
Animals
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Female
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Humans
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article