线粒体型天门冬氨酸氨基转移酶在大鼠肝移植术后的变化意义

目的 探讨线粒体型天门冬氨酸氨基转移酶(m-ASI)以及m-AST与天门冬氨酸氨基转移酶(AST)比值在大鼠自体原位肝移植手术中的变化意义.方法 采用大鼠门静脉灌注的自体原位肝移植模型,A组:自体原位肝移植组;B组:正常大鼠假手术对照组.测定两组大鼠术后各时间段血清中m-AST、AST及ALT,计算出m-AST/AST...

Significance of the change in mitochondrial aspartate aminotransferase after rat's liver transplantation

Objective To investigate the change of the mitochondrial aspartate aminotransferase (mAST), and the ratio of m-AST and aspartate aminotransferase (AST) in rat orthotopic liver transplantation.Methods We used the rat autologous orthotopic liver transplantation modelin which liver was infused by portal vein. Group A: Autologous orthotopic liver transplantation. Group B: Sham control group of normal rats. To measure the m-AST, AST and ALT in rat serum at each time, the ratio of m-AST/AST was calculated to observe the changes after surgery. Results The ALT of group A after 1 h was 1149.2 U/L, while the ALT of group B was 111.3 U/L; The AST of group A ofter 1 h was 819.5 U/L, while the AST of group B was 128.2 U/L; The m-AST of group After 1 h was 290.8 U/L, while the m-AST of group B was 40.5 U/L. The levels of m-AST, AST and ALT in group A were significantly higher than group B (P ＜ 0. 05).Group A significantly increased the degree of liver damage compared with group B. The ratio of m-AST/AST in group A changed with time obviously. Because the haff-life of m-AST in serum was shorter than that of AST, and AST in this study returned to normal slowly, the ratio of m- AST/AST in A group decreased after 6 h and the number is 0. 12. It indicating that the damage of mitochondria in rat liver cells has been restored after 6h. Conclusions It will be better to judge the prognosis of liver transplantation from the changes of serum m-AST in rats. And it seems earlier to reflect the injury or recovery of liver cell compared with AST.It also has the guiding values to diagnose and treat the damage of liver cells and mitochondrial in the rat liver transplantation.