低氧与去铁敏对移植供肝作用的对比性研究

目的 对比研究低氧预处理及去铁敏预处理对移植供肝保护作用的特点,探索一种适合指导临床的供肝保护方法.方法 SD大鼠,随机分为假手术组(S组)、自体肝移植组(AT组)、去铁敏预处理组(DP组)与低氧预处理组(HP组).检测各组术后24 h血清中谷丙转氨酶(ALT),谷草转氨酶(AST),碱性磷酸酶(ALP)、肝组织形态学改变并检测肝组织中低氧诱导因子-1(HIF-1a)及丙二醛(MDA)的含量.结果 与S组相比AT组、DP组、HP组术后血清ALT、AST、ALP明显升高,DP组、HP组与AT组相比血清ALT、AST、ALP显著降低,肝形态异常变化减轻,肝组织中HIF-1a蛋白含量升高,MDA含量下降(P<0.05).结论 在肝移植术前行DP,可以起到与HP相似的供肝保护效果,但DP更适合指导临床.

Effect of hypoxia and deferoxamine on transplanted liver

Objective To compare the protecting effect of hypoxia preconditioning(HP) and deferoxam-ine preconditioning (DP)on transplanted livers and to search a protecting method which is suitable for clini-cal practice.Methods SD rats are randomly divided into four groups:sham operation group (S),analogic transplantation group (AT),deferoxamine preconditioning group (DP) and hypoxia preconditioning group (HP).Twenty-four hours after operation,several factors of each group were measured respectively,inclu-ding deterioration of histomorphology,hepatic zymogram in the serum,hypoxia inducing factor-1 (HIF-1α)and malonaldehyde (MDA) in hepatic tissue.Results The levels of alanine aminotransferase (ALT),glu-tamic oxalacetic transaminase (AST) and alkaline phosphatase (ALP) in AT group,DP group and HP group were higher than S group's.Levels of ALT,AST,ALP in AT group were dramatically high,hepatic tissue suffers from edema,degeneration even necrosis.By contrast,the pathological change is milder in DP group and HP group.HIF-1α in hepatic tissue of AT group was lower than that in DP group and HP group,MDA was higher than two latters (P < 0.05).Conclusion DP can protect transplanted liver as same as HP,however,DP is more suitable for clinical practice.