Functional gap junctions facilitate melanoma antigen transfer and cross-presentation between human dendritic cells.

作者: Ariadna Mendoza-Naranjo , Pablo J. Saéz , C. Christian Johansson , Marcos Ramírez , Dinka Mandaković

DOI: 10.4049/JIMMUNOL.178.11.6949

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摘要: Previously, we found that human dendritic cells (hDCs) pulsed with a melanoma cell lysate (MCL) and stimulated TNF-alpha (MCL/TNF) acquire mature phenotype in vitro are able to trigger tumor-specific immune responses when they used immunotherapy patients. In this study, describe MCL/TNF induces gap junction (GJ)-mediated intercellular communications promotes Ag transfer between ex vivo produced hDCs from also exhibit increased expression of the GJ-related protein connexin 43, which contributes GJ plaque formation after stimulation. The addition inhibitors suppresses tumor hDCs, thus reducing melanoma-specific T activation. summary, demonstrate MCL/TNF-stimulated can establish functional channels participate transfer, facilitating cross-presentation an effective cell-mediated response. These results suggest GJs formed cancer vaccination protocols could be essentials for establishment more efficient antitumor

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