[Effect of ischemic preconditioning on adenine nucleotide levels of graft lung from canine donor].

Twelve canine left lung allotransplantation were performed. In the ischemic preconditioning group (Group IP, n = 6), left donor lung was preconditioned with 10 min ischemia followed by 15 min reperfusion using the occuluding left hilum before resection and cold perfusion. The control group (Group C, n = 6) underwent the same treatment but without ischemic preconditioning. Adenine nucleotides (ATP, ADP, AMP) of the donor lung tissue were measured using rHPLC after 2 hr of resection and cold perfusion with Euro-Collins solution (ECS). The results showed that contents of ATP and total adenine nucleotides (TAN) were much higher in Group IP than in Group C (322.9 +/- 61.2, 942.9 +/- 134.5 and 200.0 +/- 50.0, 668.4 +/- 59.6 mumol.g-1 respectively, P < 0.05). Histologic examination of the donor lung in Group IP showed less damage than in Group C after 2 hr of transplantation. The results suggest that IP combined with cold ECS perfusion can reduce the energy metabolism in canine donor lung.