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Cancer Immunol Immunother ; 58(11): 1831-41, 2009 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-19330330

RESUMO

BACKGROUND: Alloreaction is known to accumulate several theoretical advantages that can improve dendritic cell (DC)-based anti-infective or antitumour strategies. Allogeneic DC have already been tested in experimental and clinical studies, but their efficacy compared with their autologous counterparts was rarely investigated and conclusions diverge. OBJECTIVE: This study compared antigen-specific T cell responses following priming with autologous versus allogeneic DC and examined the possibility of screening these responses in order to select allogeneic DC that lead to a great amplification. RESULTS: Allogeneic DC obtained from donors matched with the single HLA-A2 allele were efficient in generating in vitro peptide-specific T cell responses. When randomly chosen, allogeneic DC generated a broad range of antigen-specific T cell responses in comparison with autologous DC. When screened and selected, allogeneic DC markedly enhanced peptide-specific T cell priming and allowed a more efficient boosting of resulting T cells. These selected allogeneic DC provided a favourable cytokinic and cellular environment that can help concurrent antigen-specific responses. CONCLUSION: Ex vivo selected allogeneic DC provide adjuvant effects that lead to amplification of concomitant antigen-specific T cell responses.


Assuntos
Antígenos de Neoplasias/imunologia , Células Dendríticas/imunologia , Linfócitos T/imunologia , Células Apresentadoras de Antígenos/imunologia , Células Cultivadas , Citocinas/biossíntese , Antígeno HLA-A2/imunologia , Humanos , Linfócitos T Citotóxicos/imunologia
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