Volume 62, Issue 50 e202314588
Research Article

T Cell Antigen Recognition and Discrimination by Electrochemiluminescence Imaging

Yajuan Yan

Yajuan Yan

Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou, 310058 China

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Dr. Ping Zhou

Dr. Ping Zhou

Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou, 310058 China

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Lurong Ding

Lurong Ding

Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou, 310058 China

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Dr. Wei Hu

Corresponding Author

Dr. Wei Hu

Kidney Disease Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310058 China

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Prof. Dr. Wei Chen

Corresponding Author

Prof. Dr. Wei Chen

Department of Cardiology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058 China

Liangzhu Laboratory, Zhejiang University, Hangzhou, 311121 China

Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Ministry of Education Frontier Science Center for Brain Science & Brain-machine Integration, State Key Laboratory for Modern Optical Instrumentation, Key Laboratory for Biomedical Engineering of the Ministry of Education, College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, Zhejiang 310012 China

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Prof. Dr. Bin Su

Corresponding Author

Prof. Dr. Bin Su

Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou, 310058 China

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First published: 30 October 2023
Citations: 22

Graphical Abstract

We report a label-free approach for imaging immune synapses of T cells by electrochemiluminescence microscopy, which allows us to discriminate specific T cell receptor (TCR)/peptide-loaded major histocompatibility complex (pMHC) recognition, as well as the role of auxiliary molecules (costimulatory and adhesion molecules). The results would be useful in the development of tumour vaccines and adoptive T cell transfer immunotherapy.

Abstract

Adoptive T lymphocyte (T cell) transfer and tumour-specific peptide vaccines are innovative cancer therapies. An accurate assessment of the specific reactivity of T cell receptors (TCRs) to tumour antigens is required because of the high heterogeneity of tumour cells and the immunosuppressive tumour microenvironment. In this study, we report a label-free electrochemiluminescence (ECL) imaging approach for recognising and discriminating between TCRs and tumour-specific antigens by imaging the immune synapses of T cells. Various T cell stimuli, including agonistic antibodies, auxiliary molecules, and tumour-specific antigens, were modified on the electrode's surface to allow for their interaction with T cells bearing different TCRs. The formation of immune synapses activated by specific stimuli produced a negative (shadow) ECL image, from which T cell antigen recognition and discrimination were evaluated by analysing the spreading area and the recognition intensity of T cells. This approach provides an easy way to assess TCR-antigen specificity and screen both of them for immunotherapies.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

author upon reasonable request.

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