Nontransgenic hyperexpression of a complement regulator in donor kidney modulates transplant ischemia/reperfusion damage, acute rejection, and chronic …

JR Pratt, ME Jones, J Dong, W Zhou… - The American journal of …, 2003 - Elsevier
JR Pratt, ME Jones, J Dong, W Zhou, P Chowdhury, RAG Smith, SH Sacks
The American journal of pathology, 2003Elsevier
Complement activation during ischemia and reperfusion contributes to the development of
tissue injury with severe negative impact on outcomes in transplantation. To counter the
effect of complement, we present a strategy to deliver a novel complement regulator
stabilized on cell surfaces within donor organs. The membrane-bound complement
regulator is able to inhibit complement activation when the donor organ is revascularized
and exposed to host-circulating complement. Application of this construct to donor kidneys …
Complement activation during ischemia and reperfusion contributes to the development of tissue injury with severe negative impact on outcomes in transplantation. To counter the effect of complement, we present a strategy to deliver a novel complement regulator stabilized on cell surfaces within donor organs. The membrane-bound complement regulator is able to inhibit complement activation when the donor organ is revascularized and exposed to host-circulating complement. Application of this construct to donor kidneys protected transplanted tissues from ischemia/reperfusion injury and reduced the deposition of activated complement and histological signs of damage under conditions in which a nontargeted control construct was ineffective. Treatment of donor organs in this way improved graft performance in the short and long term. An analysis of the immune response in allograft recipients showed that reducing graft damage at the time of transplantation through complement regulation also modulated the alloresponse. Additionally, the results of perfusion studies with human kidneys demonstrated the feasibility of targeting endothelial and epithelial surfaces with this construct, to allow investigation in clinical transplantation.
Elsevier