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Implications of Resident Memory T Cells for Transplantation #MMPMID27804207
Beura LK; Rosato PC; Masopust D
Am J Transplant 2017[May]; 17 (5): 1167-75 PMID27804207show ga
Recent studies have established resident memory T cells (TRM) as the dominant memory lymphocyte population surveying most non-lymphoid tissues. Unlike other memory T cell lineages, TRM do not recirculate through blood and are permanently confined to their tissue of residence. TRM orchestrate local immune responses and have been shown to accelerate local pathogen control in many experimental infection models. Here we briefly summarize recent advances in TRM differentiation, maintenance and their protective function. While little is known, we have speculated on the potential implications of TRM for transplantation biology. Areas of emphasis include the role of passenger TRM in controlling latent viral recrudescence in donor organs, donor TRM as a source of graft-versus-host disease (GVHD), the ability of TRM to potently induce inflammation through sensing and alarm functions and differentiation of host T cells into TRM in response to local cues inside the allograft. Further investigation of TRM in the context of transplantation might identify therapeutic targets to prolong graft survival.