Abstract
To investigate the role of the liver in immune responses after small bowel transplantation, donor-specific splenocytes were infused perioperatively, via the portal vein, in a rat heterotopic small bowel transplant model. Heterotopic small bowel transplantation between the fully allogenic Brown Norway (BN) (RT1n) and Lewis (RT1[1]) strain rats were performed. We prepared donor splenocytes from BN or third-party WKA (RT1k) rat spleens for Lewis hosts and injected the splenocytes perioperatively via the host portal vein or the systemic vein. The hosts were treated with a short course of the immunosuppressive agent, FK506 (0.5 mg/kg, 0-3 days postoperatively), following the experimental protocols. Untreated Lewis hosts rejected BN small bowel grafts at 5.4+/-0.9 days (n=8). BN splenocytes given alone caused fatal graft-versus-host disease in six of eight animals, and two others died from graft rejection. FK506 alone did not significantly prolong graft survival (6.3+/-1.0 days, n=10). However, BN splenocytes injected via the portal vein, combined with FK506, prolonged graft survival to 12.7+/-2.1 days (n=12, P < 0.01) and 10 of 12 rats survived more than 70 days. This was donor antigen specific. BN splenocytes administered systemica...Continue Reading
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Sep 19, 2003·The Journal of Surgical Research·Brett Levay-YoungRainer W G Gruessner
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