A Unified Atlas of T cell Glycophysiology
Izzati, F. N.; Choksi, H.; Giuliana, P.; Abd-Rabbo, D.; Elsaesser, H.; Blundell, A.; Affe, V.; Kannen, V.; Jame-Chenarboo, Z.; Schmidt, E.; Kuypers, M.; Avila, D. B.; Chiu, E. S. Y.; Badmaev, D.; Cui, H.; Matthews, J.; Mallevaey, T.; Macauley, M. S.; Brooks, D. G.; Edgar, L. J.
Show abstract
Glycans are emerging as important regulators of T cell function but remain poorly characterized across the functionally distinct populations that exist in vivo. Here, we couple single-cell analysis technologies with soluble lectins and chemical probes to interrogate glycosylation patterns on major T cell populations across multiple mouse and human tissues. Our analysis focused on terminal glycan epitopes with immunomodulatory functions, including sialoglycan ligands for Siglecs. We demonstrate that glycosylation patterns are diverse across the resting murine T cell repertoire and dynamically remodelled in response to antigen-specific stimulation. Surprisingly, we find that human T cell populations do not share the same glycoprofiles or glycan remodelling dynamics as their murine counterparts. We show that these differences can be explained by divergent regulation of glycan biosynthesis pathways between the species. These results highlight fundamental glycophysiological differences between mouse and human T cells and reveal features that are critical to consider for glycan-targeted therapies.
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