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2016 ; 196
(1
): 64-71
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gab.com Text
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The Tumor Antigen NY-ESO-1 Mediates Direct Recognition of Melanoma Cells by CD4+
T Cells after Intercellular Antigen Transfer
#MMPMID26608910
Fonteneau JF
; Brilot F
; Münz C
; Gannagé M
J Immunol
2016[Jan]; 196
(1
): 64-71
PMID26608910
show ga
NY-ESO-1-specific CD4(+) T cells are of interest for immune therapy against
tumors, because it has been shown that their transfer into a patient with
melanoma resulted in tumor regression. Therefore, we investigated how NY-ESO-1 is
processed onto MHC class II molecules for direct CD4(+) T cell recognition of
melanoma cells. We could rule out proteasome and autophagy-dependent endogenous
Ag processing for MHC class II presentation. In contrast, intercellular Ag
transfer, followed by classical MHC class II Ag processing via endocytosis,
sensitized neighboring melanoma cells for CD4(+) T cell recognition. However,
macroautophagy targeting of NY-ESO-1 enhanced MHC class II presentation.
Therefore, both elevated NY-ESO-1 release and macroautophagy targeting could
improve melanoma cell recognition by CD4(+) T cells and should be explored during
immunotherapy of melanoma.