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Stimulation of Innate Immune Cells by Light-Activated TLR7/8 Agonists #MMPMID25029205
Ryu KA; Stutts L; Tom JK; Mancini RJ; Esser-Kahn AP
J Am Chem Soc 2014[Aug]; 136 (31): 10823-5 PMID25029205show ga
The innate immune response is controlled, in part, by the synergistic interaction of multiple Toll-like receptors (TLRs). This multi-receptor cooperation is responsible for the potent activity of many vaccines, but few tools have been developed to understand the spatio-temporal elements of TLR synergies. In this Communication, we present photo-controlled agonists of TLR7/8. By strategically protecting the active agonist moiety based on an agonist-bound crystal structure, TLR activity is suppressed and then regained upon exposure to light. We confirmed NF-?B production upon light exposure in a model macrophage cell line. Primary cell activity was confirmed by examining cytokine and cell surface marker production in bone-marrow-derived dendritic cells. Finally, we used light to activate dendritic cell sub-populations within a larger population.