TCR/CD3-based synthetic antigen receptors (TCC) convey superior antigen sensitivity combined with high fidelity of activation

Vanessa Mühlgrabner, Timo Peters, Rubí M.H. Velasco Cárdenas, Benjamin Salzer, Janett Göhring, Angelika Plach, Maria Höhrhan, Iago Doel Perez, Vasco Dos Reis Goncalves, Jesús Siller Farfán, Manfred Lehner, Hannes Stockinger, Wolfgang W. Schamel, Kilian Schober, Dirk H. Busch, Michael Hudecek, Omer Dushek, Susana Minguet, René Platzer, Johannes B. Huppa

Research output: Contribution to journalArticlepeer-review

Abstract

Low antigen sensitivity and a gradual loss of effector functions limit the clinical applicability of chimeric antigen receptor (CAR)–modified T cells and call for alternative antigen receptor designs for effective T cell–based cancer immunotherapy. Here, we applied advanced microscopy to demonstrate that TCR/CD3-based synthetic constructs (TCC) outperform second-generation CAR formats with regard to conveyed antigen sensitivities by up to a thousandfold. TCC-based antigen recognition occurred without adverse nonspecific signaling, which is typically observed in CAR–T cells, and did not depend—unlike sensitized peptide/MHC detection by conventional T cells—on CD4 or CD8 coreceptor engagement. TCC-endowed signaling properties may prove critical when targeting antigens in low abundance and aiming for a durable anticancer response.

Original languageEnglish
Article numbereadj4632
JournalScience Advances
Volume10
Issue number36
DOIs
StatePublished - 6 Sep 2024

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