Superior induction of anti-tumor CTL immunity by extended peptide vaccines involves prolonged, DC-focused antigen presentation.
Eur J Immunol
; 38(4): 1033-42, 2008 Apr.
Article
em En
| MEDLINE
| ID: mdl-18350546
ABSTRACT
Anti-tumor vaccines consisting of extended CTL peptides in combination with CpG-ODN were shown to be superior to those comprising minimal CTL epitopes and CpG-ODN, in that they elicit stronger effector CTL responses with greater tumoricidal potential. We now demonstrate that this improved performance is primarily due to the focusing of CTL epitope presentation onto activated DC in the inflamed lymph nodes draining the vaccination site. In the case of vaccination with minimal peptides, additional APC including T and B cells are also loaded with CTL epitopes. Our data suggest that circulation of these peptide-loaded lymphocytes leads to epitope presentation in non-inflamed lymphoid organs distal from the vaccination site, in the absence of potent costimulatory signals required for efficient CTL priming. The resulting blend of pro-immunogenic and tolerogenic signals, which results in suboptimal activation of the CTL response, is avoided by vaccinating with extended CTL peptides. An additional advantage of extended CTL peptide vaccines is an increased duration of in vivo epitope presentation.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Células Dendríticas
/
Linfócitos T Citotóxicos
/
Apresentação de Antígeno
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Vacinas Anticâncer
/
Vacinas de Subunidades Antigênicas
Limite:
Animals
Idioma:
En
Revista:
Eur J Immunol
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Holanda