1. Camelid-derived Tcell engagers harnessing human γδ T cells as promising antitumor immunotherapeutic agents.
- Author
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Boutin L, Barjon C, Chauvet M, Lafrance L, Senechal E, Bourges D, Vigne E, and Scotet E
- Subjects
- Humans, Animals, Immunotherapy methods, Neoplasms immunology, Neoplasms therapy, Single-Domain Antibodies immunology, Cell Line, Tumor, T-Lymphocytes, Cytotoxic immunology, Receptors, Antigen, T-Cell, alpha-beta immunology, Carcinoembryonic Antigen immunology, Receptors, Antigen, T-Cell, gamma-delta immunology, Antibodies, Bispecific immunology, Lymphocyte Activation immunology
- Abstract
In the last decade, there has been a surge in developing immunotherapies to enhance the immune system's ability to eliminate tumor cells. Bispecific antibodies known as T cell engagers (TCEs) present an attractive strategy in this pursuit. TCEs aim to guide cytotoxic T cells toward tumor cells, thereby inducing a strong activation and subsequent tumor cell lysis. In this study, we investigated the activity of different TCEs on both conventional alpha-beta (αβ) T cells and unconventional gamma delta (γδ) T cells. TCEs were built using camelid single-domain antibodies (VHHs) targeting the tumor-associated antigen CEACAM5 (CEA), together with T cell receptor chains or a CD3 domain. We show that Vγ9Vδ2 T cells display stronger in vitro antitumor activity than αβ T cells when stimulated with a CD3xCEA TCE. Furthermore, restricting the activation of fresh human peripheral T cells to Vγ9Vδ2 T cells limited the production of protumor factors and proinflammatory cytokines, commonly associated with toxicity in patients. Taken together, our findings provide further insights that γδ T cell-specific TCEs hold promise as specific, effective, and potentially safe molecules to improve antitumor immunotherapies., (© 2024 The Authors. European Journal of Immunology published by Wiley‐VCH GmbH.)
- Published
- 2024
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