Abstract
T cells play a determining role in the immunomodulation and prognostic evaluation of cancer treatments relying on immune activation. While specific biomarkers determine the population and distribution of T cells in tumours, the in situ activity of T cells is less studied. Here we designed T-cell-targeting fusogenic liposomes to regulate and quantify the activity of T cells by exploiting their surface redox status as a chemical target. The T-cell-targeting fusogenic liposomes equipped with 2,2,6,6-tetramethylpiperidine (TEMP) groups neutralize reactive oxygen species protecting T cells from oxidation-induced loss of activity. Meanwhile, the production of paramagnetic 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) radicals allows magnetic resonance imaging quantification of the T cell activity. In multiple mouse models, the T-cell-targeting fusogenic liposomes led to efficient tumour inhibition and to early prediction of radiotherapy outcomes. This study uses a chemical targeting strategy to measure the in situ activity of T cells for cancer theranostics and may provide further understanding on engineering T cells for cancer treatment.
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Data availability
The main data that support the findings of this study are available within the Article, Supplementary Information and Supplementary Data 1. Other relevant data during the study are available for research purposes from the corresponding authors upon reasonable request. Source data are provided with this paper.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (grant no. 82272136, Z.Z.; no. 31971302, W.G.), the Special Project from the National Science and Technology Program for Central Guided Local Development (grant no. 2021L3010075, Z.Z.), the Start-up Programme from Xiamen University (Z.Z.), the project funded by China Postdoctoral Science Foundation (grant no. 2022M722654, C.S.), the National University of Singapore Start-up Grant (NUHSRO/2020/133/Startup/08, X.C.), National University of Singapore School of Medicine Nanomedicine Translational Research Program (NUHSRO/2021/034/TRP/09/Nanomedicine, X.C.) and National Medical Research Council Centre Grant Programme (CG21APR1005, X.C.). We cordially thank G. Liu and C. Liu for fruitful discussions, Z. Huang for her support in MRI scanning and D. Guo and X. Zhang from the School of Public Health at Xiamen University for their support in using the microscope and flow cytometer.
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Z.Z., C.S., W.G. and X.C. conceived and designed the project. C.S., F.Z., C.D., Q.Z. and H.Y. performed the material synthesis and characterizations. C.S. and Q.Z. prepared the samples. C.S. and Q.Z. acquired and analysed all the MRI data. C.S., Q.Z., Y.Y., Xinyi Zhang, S.N., F.Z., C.D. and H.C. performed the animal study. X.W., Z.G., Xianzhong Zhang and J.G. analysed and discussed the results. C.S., Z.Z., W.G. and X.C. analysed the results and cowrote the paper. All the authors discussed and approved the final version.
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Shi, C., Zhang, Q., Yao, Y. et al. Targeting the activity of T cells by membrane surface redox regulation for cancer theranostics. Nat. Nanotechnol. 18, 86–97 (2023). https://doi.org/10.1038/s41565-022-01261-7
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DOI: https://doi.org/10.1038/s41565-022-01261-7
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