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Vaccination with trifunctional nanoparticles that address CD8 + dendritic cells inhibits growth of established melanoma.
Nanomedicine 2016 October
AIM: We wanted to assess the potency of a trifunctional nanoparticle (NP) that targeted and activated CD8+ dendritic cells (DC) and delivered an antigen to induce antitumor responses.
MATERIALS & METHODS: The DC targeting and activating properties of ferrous NPs conjugated with immunostimulatory CpG-oligonucleotides, anti-DEC205 antibody and ovalbumin (OVA) as a model antigen to induce antigen-specific T-cell responses and antitumor responses were analyzed.
RESULTS: OVA-loaded NP conjugated with immunostimulatory CpG-oligonucleotides and anti-DEC205 antibody efficiently targeted and activated CD8+ DC in vivo, and induced strong OVA-specific T-cell activation. Vaccination of B16/OVA tumor-burdened mice with this NP formulation resulted in tumor growth arrest.
CONCLUSION: CD8+ DC-targeting trifunctional nanocarriers bear significant potential for antitumor immunotherapy.
MATERIALS & METHODS: The DC targeting and activating properties of ferrous NPs conjugated with immunostimulatory CpG-oligonucleotides, anti-DEC205 antibody and ovalbumin (OVA) as a model antigen to induce antigen-specific T-cell responses and antitumor responses were analyzed.
RESULTS: OVA-loaded NP conjugated with immunostimulatory CpG-oligonucleotides and anti-DEC205 antibody efficiently targeted and activated CD8+ DC in vivo, and induced strong OVA-specific T-cell activation. Vaccination of B16/OVA tumor-burdened mice with this NP formulation resulted in tumor growth arrest.
CONCLUSION: CD8+ DC-targeting trifunctional nanocarriers bear significant potential for antitumor immunotherapy.
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