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J Immunol. 2016 Jan 1;196(1):64-71. doi: 10.4049/jimmunol.1402664. Epub 2015 Nov 25.

The Tumor Antigen NY-ESO-1 Mediates Direct Recognition of Melanoma Cells by CD4+ T Cells after Intercellular Antigen Transfer.

Author information

1
INSERM UMR892, CNRS UMR6299, Université de Nantes, Nantes 44007, France;
2
Neuroimmunology Group, Institute for Neuroscience and Muscle Research, The Kids Research Institute at the Children's Hospital at Westmead, St. Westmead, New South Wales 2145, Australia;
3
Viral Immunobiology, Institute of Experimental Immunology, University of Zürich, Zürich 8006, Switzerland;
4
Viral Immunobiology, Institute of Experimental Immunology, University of Zürich, Zürich 8006, Switzerland; Department of Pathology and Immunology, School of Medicine, University of Geneva, Geneva 1211, Switzerland; and Division of Rheumatology, Department of Internal Medicine, University Hospital, Geneva 1205, Switzerland monique.ghannage@unige.ch.

Abstract

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.

PMID:
26608910
PMCID:
PMC4683358
DOI:
10.4049/jimmunol.1402664
[Indexed for MEDLINE]
Free PMC Article

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