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pubmed-article:10037196pubmed:abstractTextThe clinical impact of dendritic cells (DCs) in the treatment of human cancer depends on their unique role as the most potent antigen-presenting cells that are capable of priming an antitumor T-cell response. Here, we demonstrate that functional DCs can be generated from peripheral blood of patients with metastatic renal cell carcinoma (RCC) by culture of monocytes/macrophages (CD14+) in autologous serum containing medium (RPMI) in the presence of granulocyte macrophage colony-stimulating factor and interleukin (IL) 4. For testing the capability of RCC-antigen uptake and processing, we loaded these DCs with autologous tumor lysate (TuLy) using liposomes, after which cytometric analysis of the DCs revealed a markedly increased expression of HLA class I antigen and a persistent high expression of class II. The immunogenicity of DC-TuLy was further tested in cultures of renal tumor infiltrating lymphocytes (TILs) cultured in low-dose IL-2 (20 Biologic Response Modifier Program units/ml). A synergistic effect of DC-TuLy and IL-2 in stimulating a T cell-dependent immune response was demonstrated by: (a) the increase of growth expansion of TILs (9.4-14.3-fold; day 21); (b) the up-regulation of the CD3+ CD56- TcR+ (both CD4+ and CD8+) cell population; (c) the augmentation of T cell-restricted autologous tumor lysis; and (d) the enhancement of IFN-gamma, tumor necrosis factor-alpha, granulocyte macrophage colony-stimulating factor, and IL-6 mRNA expression by TILs. Taken together, these data implicate that DC-TuLy can activate immunosuppressed TIL via an induction of enhanced antitumor CTL responses associated with production of Thl cells. This indicates a potential role of DC-TuLy vaccines for induction of active immunity in patients with advanced RCC.lld:pubmed
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pubmed-article:10037196pubmed:pagination445-54lld:pubmed
pubmed-article:10037196pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:10037196pubmed:articleTitlePresentation of renal tumor antigens by human dendritic cells activates tumor-infiltrating lymphocytes against autologous tumor: implications for live kidney cancer vaccines.lld:pubmed
pubmed-article:10037196pubmed:affiliationUniversity of California at Los Angeles, Department of Urology, 90095-1738, USA.lld:pubmed
pubmed-article:10037196pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:10037196pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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