Activation of innate immunity in primary human cells using a plant virus derived nanoparticle TLR7/8 agonist.
Nanomedicine
; 14(7): 2317-2327, 2018 10.
Article
em En
| MEDLINE
| ID: mdl-29128662
ABSTRACT
Rod-shaped virus-like nanoparticles (VLNP) made of papaya mosaic virus (PapMV) coat proteins (CP) self-assembled around a single stranded RNA (ssRNA) were showed to be a TLR7 agonist. Their utilization as an immune modulator in cancer immunotherapy was shown to be promising. To establish a clinical relevance in human for PapMV VLNP, we showed that stimulation of human peripheral blood mononuclear cells (PBMC) with VLNP induces the secretion of interferon alpha (IFNα) and other pro-inflammatory cytokines and chemokines. Plasmacytoid dendritic cells (pDCs) were activated and secreted IFN-α upon VLNP exposure. Monocyte-derived dendritic cells upregulate maturation markers and produce IL-6 in response to PapMV VLNP stimulation, which suggests the activation of TLR8. Finally, when co-cultured with NK cells, PapMV induced pDCs promoted the NK cytolytic activity against cancer cells. These data obtained with primary human immune cells further strengthen the clinical relevance of PapMV VLNPs as a cancer immunotherapy agent.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Células Dendríticas
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Leucócitos Mononucleares
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Potexvirus
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Receptor 7 Toll-Like
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Receptor 8 Toll-Like
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Nanopartículas
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Imunidade Inata
Limite:
Humans
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article