Abstract
Homeostatic antigen presentation by hepatic antigen-presenting cells, which results in tolerogenic T-cell education, could be exploited to induce antigen-specific immunological tolerance. Here we show that antigens modified with polymeric forms of either N-acetylgalactosamine or N-acetylglucosamine target hepatic antigen-presenting cells, increase their antigen presentation and induce antigen-specific tolerance, as indicated by CD4+ and CD8+ T-cell deletion and anergy. These synthetically glycosylated antigens also expanded functional regulatory T cells, which are necessary for the durable suppression of antigen-specific immune responses. In an adoptive-transfer mouse model of type-1 diabetes, treatment with the glycosylated autoantigens prevented T-cell-mediated diabetes, expanded antigen-specific regulatory T cells and resulted in lasting tolerance to a subsequent challenge with activated diabetogenic T cells. Glycosylated autoantigens targeted to hepatic antigen-presenting cells might enable therapies that promote immune tolerance in patients with autoimmune diseases.
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Data availability
The authors declare that all data supporting the results in this study are available within the paper and its Supplementary Information. The datasets generated and analysed during the study are available from the corresponding author upon reasonable request.
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Acknowledgements
We thank the Flow Cytometry Core Facility of EPFL for technical assistance and E. Simeoni (EPFL) for helpful discussion on the research and guidance on animal work. D.S.W. was supported by a fellowship from the Whitaker Foundation. This study was supported by the School of Life Sciences, EPFL, the University of Chicago, the Juvenile Diabetes Research Foundation and Anokion.
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D.S.W. and J.A.H. designed the research; D.S.W. and M.M.R. performed synthesis; D.S.W., M.D., S.H., K.B., G.D. and X.Q.-T. performed biological research; D.S.W. analysed data and D.S.W. and J.A.H. wrote the paper.
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The EPFL has filed for patent protection on the p(GalNAc) and p(GluNAc) delivery platforms and D.S.W. and J.A.H. are named as inventors on the patents. Anokion and Kanyos Bio have licensed the patents and J.A.H. and D.S.W. participate in equity in these companies.
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Wilson, D.S., Damo, M., Hirosue, S. et al. Synthetically glycosylated antigens induce antigen-specific tolerance and prevent the onset of diabetes. Nat Biomed Eng 3, 817–829 (2019). https://doi.org/10.1038/s41551-019-0424-1
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DOI: https://doi.org/10.1038/s41551-019-0424-1
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