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- W2004262726 abstract "Uncarinic acid C (URC) is triterpene isolated from Uncaria rhynchophylla and modulates human DC function in a fashion that favors Th1 cell polarization depending on TLR4 signaling. The induction of dendritic cells (DC) is critical for the induction of Ag-specific T lymphocyte responses and may be essential for the development of human vaccines relying on T cell immunity. Monocyte-derived DC used as adjuvant cells in cancer immunotherapy and have shown promising results. We studied the effect of interferon’s (IFN-α and IFN-γ) and TNF-α on phenotypic and functional maturation, and cytokine production of URC-primed DC in vitro. Human monocytes were exposed to either URC alone, or in combination with TNF-α, IFN-α or IFN-γ, and thereafter co-cultured with naïve T cells. We found that the expression levels of CD1a, CD83 and HLA-DR on URC-primed DC were influenced by IFN-γ and IFN-γ augmented the T cell stimulatory capacity in allo MLR to URC-primed DC. Moreover, the production of IL-12p70 by URC-primed DC was enhanced by IFN-γ. IL-12p70 production by URC-primed DC alone was influenced following treatment with anti-TLR4 mAb, but not DC differentiated with URC plus IFN-γ. URC plus IFN-γ-primed DC induced a substantial increase in the secretion of IFN-γ by T cells, which is dependent on IL-12 secretion. DC maturated with URC plus IFN-γ had an intermediate migratory capacity towards CCL19 and CCL21. In addition, the expression levels of CCR7 on URC-primed DC were enhanced by IFN-γ. In contrast, surface molecule up-regulation and function of URC-primed DC were slightly enhanced by TNF-α, and IFN-α. These results suggest that the enhancement of Th1 cells polarization to URC-primed DC induced by IFN-γ depends on the activation of IL-12p70 and independent on TLR4. DC differentiated with URC in combination with IFN-γ might be used on DC-based vaccine for cancer immunotherapy." @default.
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- W2004262726 date "2004-01-01" @default.
- W2004262726 modified "2023-10-01" @default.
- W2004262726 title "Expression of the unspliced tenascin-C isoform (Tn-CL) in urothelial carcinoma of the urinary bladder (UC)" @default.
- W2004262726 doi "https://doi.org/10.1016/s0344-0338(04)80497-7" @default.
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