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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Rep 2016 ; 15 (6): 1214-27 Nephropedia Template TP
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Augmentation of Recipient Adaptive Alloimmunity by Donor Passenger Lymphocytes within the Transplant #MMPMID27134179
Harper I; Ali J; Harper S; Wlodek E; Alsughayyir J; Negus M; Qureshi M; Motalleb-Zadeh R; Saeb-Parsy K; Bolton E; Bradley J; Clatworthy M; Conlon T; Pettigrew G
Cell Rep 2016[May]; 15 (6): 1214-27 PMID27134179show ga
Chronic rejection of solid organ allografts remains the major cause of transplant failure. Donor-derived tissue-resident lymphocytes are transferred to the recipient during transplantation, but their impact on alloimmunity is unknown. Using mouse cardiac transplant models, we show that graft-versus-host recognition by passenger donor CD4 T cells markedly augments recipient cellular and humoral alloimmunity, resulting in more severe allograft vasculopathy and early graft failure. This augmentation is enhanced when donors were pre-sensitized to the recipient, is dependent upon avoidance of host NK cell recognition, and is partly due to provision of cognate help for allo-specific B cells from donor CD4 T cells recognizing B cell MHC class II in a peptide-degenerate manner. Passenger donor lymphocytes may therefore influence recipient alloimmune responses and represent a therapeutic target in solid organ transplantation.