Zymosan by-passes the requirement for pulmonary antigen encounter in lung tissue-resident memory CD8+ T cell development.
Mucosal Immunol
; 12(2): 403-412, 2019 03.
Article
en En
| MEDLINE
| ID: mdl-30664708
ABSTRACT
Tissue-resident memory T cells (Trm) in the lung provide a frontline defence against respiratory pathogens. Vaccination models that lodge CD8+ Trm populations in the lung have been developed, all of which incorporate the local delivery of antigen plus adjuvant into the airways; a necessary approach as local cognate antigen recognition is required for optimal lung Trm development. Although pulmonary delivery of antigen is important for lung Trm development, the impact the co-administered adjuvant has on Trm differentiation is unclear. We show that while altering the adjuvant co-administered with the pulmonary delivered antigen does not impact the size of the lung Trm population, a particular adjuvant, zymosan, when administered into the airways without antigen can drive effector CD8+ T cells to differentiate into lung Trm. Zymosan signalling via dectin-1 receptor was sufficient to promote antigen-independent lung Trm development. When combined with an injectable influenza vaccination regime, intranasal zymosan delivery significantly boosted the size of the influenza virus-specific lung Trm population. Our results highlight that eliciting the appropriate local inflammatory milieu can by-pass the requirement for local antigen recognition in lung Trm development and emphasises that the appropriate selection of adjuvant can greatly improve vaccines that aim to elicit pulmonary Trm.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Virus de la Influenza A
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Zimosan
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Vacunas contra la Influenza
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Linfocitos T Reguladores
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Infecciones por Orthomyxoviridae
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Linfocitos T CD8-positivos
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Gripe Humana
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Pulmón
Límite:
Animals
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Humans
Idioma:
En
Año:
2019
Tipo del documento:
Article