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

Identifieur interne : 002D98 ( Ncbi/Checkpoint ); précédent : 002D97; suivant : 002D99

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

Auteurs : Jean Francois Fonteneau [France] ; Fabienne Brilot [Australie] ; Christian Münz [Suisse] ; Monique Gannagé [Suisse]

Source :

RBID : PMC:4683358

Descripteurs français

English descriptors

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.


Url:
DOI: 10.4049/jimmunol.1402664
PubMed: 26608910
PubMed Central: 4683358


Affiliations:


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PMC:4683358

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<term>Antigens, Neoplasm (immunology)</term>
<term>Autophagy (immunology)</term>
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<term>CD4-Positive T-Lymphocytes (immunology)</term>
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<term>Lymphocyte Activation (immunology)</term>
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<term>Membrane Proteins</term>
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<term>CD4-Positive T-Lymphocytes</term>
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<div type="abstract" xml:lang="en">
<p>NY-ESO-1–specific CD4
<sup>+</sup>
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
<sup>+</sup>
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
<sup>+</sup>
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
<sup>+</sup>
T cells and should be explored during immunotherapy of melanoma.</p>
</div>
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