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Comparative strategies to induce long-term graft acceptance in fully allogeneic renal versus cardiac allograft models by CD28-B7 T cell costimulatory blockade: role of thymus and spleen.

M Schaub, T H Stadlbauer, A Chandraker, J P Vella, L A Turka and M H Sayegh
JASN May 1998, 9 (5) 891-898;
M Schaub
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T H Stadlbauer
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A Chandraker
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J P Vella
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L A Turka
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M H Sayegh
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Abstract

Blocking CD28-B7 T cell costimulatory activation by the fusion protein CTLA4Ig prevents rejection and induces long-term graft acceptance in various experimental transplant models. There are reported differences in the efficacy of CTLA4Ig in renal and cardiac rodent allograft models, but it is not clear whether these are due to the strain or species differences investigated in the different studies reported. This study investigates the effect of blocking CD28-B7 T cell costimulation with murine CTLA4Ig in rat models of acute renal and cardiac allograft rejection models, using the same complete major histocompatibility complex-incompatible strain combination. A single injection of murine CTLA4Ig 2 d after engraftment was able to induce long-term graft acceptance (> 100 d) in 54% of Lewis rat recipients of Wistar-Furth kidneys. Transferring this protocol into the acute Wistar-Furth to Lewis heart allograft model resulted in a mean graft survival time of 24.7+/-16.9 d, and all grafts were ultimately rejected. Only concomitant injection of donor cells (4 x 10(7) splenocytes) plus a single injection of CTLA4Ig on the day of transplant could induce long-term graft acceptance in 50% of animals. In both the cardiac and renal transplant models, the thymus and spleen were required for induction of tolerance. The maintenance phase of tolerance, however, did not require an intact thymus but did require the presence of a spleen. These data have important clinical applicability because human studies with T cell costimulatory blockade are being planned.

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Journal of the American Society of Nephrology
Vol. 9, Issue 5
1 May 1998
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Comparative strategies to induce long-term graft acceptance in fully allogeneic renal versus cardiac allograft models by CD28-B7 T cell costimulatory blockade: role of thymus and spleen.
M Schaub, T H Stadlbauer, A Chandraker, J P Vella, L A Turka, M H Sayegh
JASN May 1998, 9 (5) 891-898;

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Comparative strategies to induce long-term graft acceptance in fully allogeneic renal versus cardiac allograft models by CD28-B7 T cell costimulatory blockade: role of thymus and spleen.
M Schaub, T H Stadlbauer, A Chandraker, J P Vella, L A Turka, M H Sayegh
JASN May 1998, 9 (5) 891-898;
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Cited By...

  • Cutting Edge: Pseudomonas aeruginosa Abolishes Established Lung Transplant Tolerance by Stimulating B7 Expression on Neutrophils
  • Pig Embryonic Pancreatic Tissue as a Source for Transplantation in Diabetes: Transient Treatment With Anti-LFA1, Anti-CD48, and FTY720 Enables Long-Term Graft Maintenance in Mice With Only Mild Ongoing Immunosuppression
  • Chronic Rejection: Insights from a Novel Immunosuppressive-Free Model of Kidney Transplantation
  • Regulation of Gene Expression of Murine MD-1 Regulates Subsequent T Cell Activation and Cytokine Production
  • Tolerance to Cardiac Allografts Via Local and Systemic Mechanisms After Adenovirus-Mediated CTLA4Ig Expression
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