The induction of operational tolerance is not prevented by simultaneous administration of cyclosporin A1 |
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Authors: | K Hamano Hiroshi Ito Andrew Bushell Kathryn J Wood Kensuke Esato |
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Institution: | (1) First Department of Surgery, Yamaguchi University, School of Medicine, 1144 Kogushi, Ube, Yamaguchi, 755, Japan Fax: + 8 18 36 22 22 60, JP;(2) Nuffield Department of Surgery, University of Oxford, John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK, GB |
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Abstract: | In this study, the effect of combining anti-CD4 monoclonal antibody (mAb) and cyclosporin (CyA) therapy at the time of transplantation
was examined. A mouse cardiac allograft model was used. Anti-CD4 mAb administered perioperatively induces long-term survival.
The addition of a short course of CyA given subcutaneously in a regimen of either a high-dose treatment or a standard dose
treatment to the anti-CD4 mAb treatment protocol did not have a detrimental effect on graft survival. Despite having no significant
effect on graft survival, the addition of CyA to the treatment protocol did result in a significant decrease in the level
of IL-2 present in the hearts 7 days after transplantation. The decrease in IL-2 production was directly related to the presence
of CyA in vivo. When CyA treatment was continued throughout the period during which unresponsiveness to the graft is induced
by anti-CD4 mAb therapy, 50 % of the grafted hearts were rejected once the CyA was discontinued. In conclusion, the combined
use of anti-CD4 mAb therapy and CyA did not have a negative effect on graft survival in this model when the two agents were
used concurrently at the time of transplantation.
Received: 2 October 1996 Received after revision: 31 January 1997 Accepted: 5 February 1997 |
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Keywords: | Cyclosporin heart transplantation mouse Heart transplantation cyclosporin mouse Tolerance anti-CD4 cyclosporin Anti-CD4 cyclosporin tolerance |
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