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Abstract
Despite current immunosuppressive strategies, long-term lung transplant outcomes remain poor due to rapid allogenic responses. Using a stringent mouse model of allo-airway transplantation, we identified the CCR4-ligand axis as a central node driving secondary lymphoid tissue homing and activation of the allogeneic T cells that prevent long-term allograft survival. CCR4 deficiency on transplant recipient T cells diminished allograft injury and when combined with CTLA4-Ig led to lung allograft accommodation lasting longer than in any previous study to our knowledge. Thus, we identify CCR4-ligand interactions as a central mechanism driving allogeneic transplant rejection and suggest it as a potential target to enhance long-term lung transplant survival.
Authors
Vyacheslav Palchevskiy, Ying Ying Xue, Rita Kern, Stephen S. Weigt, Aric L. Gregson, Sophie X. Song, Michael C. Fishbein, Cory M. Hogaboam, David M. Sayah, Joseph P. Lynch III, Michael P. Keane, David G. Brooks, John A. Belperio
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