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Published in: Cancer Immunology, Immunotherapy 5/2009

01-05-2009 | Original Article

Characterization of MHC class-I restricted TCRαβ+ CD4 CD8 double negative T cells recognizing the gp100 antigen from a melanoma patient after gp100 vaccination

Authors: Simon Voelkl, Tamson V. Moore, Michael Rehli, Michael I. Nishimura, Andreas Mackensen, Karin Fischer

Published in: Cancer Immunology, Immunotherapy | Issue 5/2009

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Abstract

The immune attack against malignant tumors require the concerted action of CD8+ cytotoxic T lymphocytes (CTL) as well as CD4+ T helper cells. The contribution of T cell receptor (TCR) αβ+ CD4 CD8 double-negative (DN) T cells to anti-tumor immune responses is widely unknown. In previous studies, we have demonstrated that DN T cells with a broad TCR repertoire are present in humans in the peripheral blood and the lymph nodes of healthy individuals. Here, we characterize a human DN T cell clone (T4H2) recognizing an HLA-A2-restricted melanoma-associated antigenic gp100-peptide isolated from the peripheral blood of a melanoma patient. Antigen recognition by the T4H2 DN clone resulted in specific secretion of IFN-γ and TNF. Although lacking the CD8 molecule the gp100-specifc DN T cell clone was able to confer antigen-specific cytotoxicity against gp100-loaded target cells as well as HLA-A2+ gp100 expressing melanoma cells. The cytotoxic capacity was found to be perforin/granzymeB-dependent. Together, these data indicate that functionally active antigen-specific DN T cells recognizing MHC class I-restricted tumor-associated antigen (TAA) may contribute to anti-tumor immunity in vivo.
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Metadata
Title
Characterization of MHC class-I restricted TCRαβ+ CD4− CD8− double negative T cells recognizing the gp100 antigen from a melanoma patient after gp100 vaccination
Authors
Simon Voelkl
Tamson V. Moore
Michael Rehli
Michael I. Nishimura
Andreas Mackensen
Karin Fischer
Publication date
01-05-2009
Publisher
Springer-Verlag
Published in
Cancer Immunology, Immunotherapy / Issue 5/2009
Print ISSN: 0340-7004
Electronic ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-008-0593-3

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