Regulation of antigen presentation machinery in human dendritic cells by recombinant adenovirus

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• 作者：Lazar Vujanovic ; Theresa L. Whiteside ; Douglas M. Potter ; Jessica Chu ; Soldano Ferrone and Lisa H. Butterfield
• 关键词：Dendritic cells ; Human ; Antigen presentation/processing ; Gene therapy ; Tumor immunity
• 刊名：Cancer Immunology, Immunotherapy
• 出版年：2009
• 出版时间：January, 2009
• 年：2009
• 卷：58
• 期：1
• 页码：121-133
• 全文大小：735.2 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Biomedicine
  Cancer Research
  Immunology
  Oncology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-0851

文摘

Recombinant adenoviral vectors (AdV) are potent vehicles for antigen engineering of dendritic cells (DC). DC engineered with AdV to express full length tumor antigens are capable stimulators of antigen-specific polyclonal CD8+ and CD4+ T cells. To determine the impact of AdV on the HLA class I antigen presentation pathway, we investigated the effects of AdV transduction on antigen processing machinery (APM) components in human DC. Interactions among AdV transduction, maturation, APM regulation and T cell activation were investigated. The phenotype and cytokine profile of DC transduced with AdV was intermediate, between immature (iDC) and matured DC (mDC). Statistically significant increases in expression were observed for peptide transporters TAP-1 and TAP-2, and HLA class I peptide-loading chaperone ERp57, as well as co-stimulatory surface molecule CD86 due to AdV transduction. AdV transduction enhanced the expression of APM components and surface markers on mDC, and these changes were further modulated by the timing of DC maturation. Engineering of matured DC to express a tumor-associated antigen stimulated a broader repertoire of CD8+ T cells, capable of recognizing immunodominant and subdominant epitopes. These data identify molecular changes in AdV-transduced DC (AdV/DC) that could influence T cell priming and should be considered in design of cancer vaccines.