A Novel Cyclopropenyl Fatty Acid Library Reveals Tissue-Specific Preferences for Regulatory T Cell Uptake Through Click-Chemistry
Heieis, G.; Reinalda, L.; Bogue, L. I.; Steuten, K.; Corrigan, C.; Wang, X.; Bertheussen, K.; el Boujadayni, M.; Sinclair, L. V.; van der Stelt, M.; Everts, B.; Finlay, D. K.; Van Kasteren, S. I.
Show abstract
The activation of T-cells is heavily shaped by the nutrients that are available during activation. Fatty acids can have highly pleiotropic effects in this process. On the one hand, they are essential for driving T-cell activation, yet on the other hand they can affect curtailed T-cell activation. These differences are likely dependent on the nature and absolute uptake of the fatty acids. Quantifying the uptake of specific FAs by individual cells and studying the effect on the phenotype of the cell is currently not possible with existing tools. Here we therefore use the live-cell compatible Inverse Electron-Demand Diels-Alder reaction combined with the synthesis of saturated, unsaturated and polyunsaturated fatty acids carrying the 1-carbon cyclopropene click group. Single cell uptake studies of these various clickable FAs in primary immune cell mixtures show highly divergent uptake behaviour between different immune cells, with polyunsaturated fatty acids markedly preferred by all immune cells tested.
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