A single TCR alpha-chain with dominant peptide recognition in the allorestricted HER2/neu-specific T cell repertoire
| Autor: | Luise U. Weigand, Andreas Moosmann, Daniel Sommermeyer, Joachim W. Ellwart, Xiaoling Liang, Andrea Schub, Yanyan Han, Angela M. Krackhardt, Judith C. van der Griendt, Matthias Leisegang, Ingrid G. Schuster, Florian Anderl, Christian Peschel, Dirk H. Busch, Wolfgang Uckert, Elfriede Eppinger |
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| Rok vydání: | 2010 |
| Předmět: |
Adoptive cell transfer
Isoantigens Receptor ErbB-2 CD3 T cell Receptors Antigen T-Cell alpha-beta Immunology Molecular Sequence Data Epitopes T-Lymphocyte chemical and pharmacologic phenomena Hybrid Cells Jurkat cells Epitope Jurkat Cells Antigen T-Lymphocyte Subsets Cell Line Tumor HLA-A2 Antigen medicine Immunology and Allergy Humans Amino Acid Sequence Cell Line Transformed Antigen Presentation biology Immunodominant Epitopes T-cell receptor hemic and immune systems Peptide Fragments Cell biology Clone Cells medicine.anatomical_structure biology.protein K562 Cells CD8 |
| Zdroj: | Journal of immunology (Baltimore, Md. : 1950). 184(3) |
| ISSN: | 1550-6606 |
| Popis: | T cells can recognize tumor cells specifically by their TCR and the transfer of TCR-engineered T cells is a promising novel tool in anticancer therapies. We isolated and characterized four allorestricted TCRs with specificity for the HER2/neu-derived peptide 369 (HER2369) demonstrating high peptide specificity. PBMCs transduced with especially one TCR, HER2-1, mediated specific tumor reactivity after TCR optimization suggesting that this TCR represents a potential candidate for targeting HER2 by TCR-transduced effector cells. Another TCR showed high-peptide specificity without tumor reactivity. However, the TCRα-chain of this TCR specifically recognized HER2369 not only in combination with the original β-chain but also with four other β-chains of the same variable family deriving from TCRs with diverse specificities. Pairing with one β-chain derived from another HER2369-specific TCR potentiated the chimeric TCRs in regard to functional avidity, CD8 independency, and tumor reactivity. Although the frequency of such TCR single chains with dominant peptide recognition is currently unknown, they may represent interesting tools for TCR optimization resulting in enhanced functionality when paired to novel partner chains. However, undirected mispairing with novel partner chains may also result in enhanced cross-reactivity and self-reactivity. These results may have an important impact on the further design of strategies for adoptive transfer using TCR-transduced T cells. |
| Databáze: | OpenAIRE |
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