暴发性肝损伤肝性脑病大鼠血浆及脑游离氨基酸变化的相关分析

本文测定了D-氨基半乳糖所致暴发性肝损伤肝性脑病大鼠血浆及脑勺浆游离氨基酸含量的变化,并作相应的相关分析。结果表明,正常大鼠血浆及脑内各种氨基酸含量间均无相关。肝性脑病大鼠血浆及脑勺浆多种氨基酸水平均有增高,脑内大多数氨基酸含量与血浆相应氨基酸的变化无相关关系,但一些与肝性脑病发生相关的氨基酸水平与其相应的血浆含量呈显著相关。提示肝性脑病的发生与血脑屏障氨基酸转运功能选择性改变有关。

Correlative analysis of free amino acid changes in plasma and brain in hepatic encephalopathy of fulminant hepatic failure in rats

Changes of free amino acids in plasma and brain of rats with fulminanthepatic failure were measured with a Beckman 6300 amino acid analyzer.Results indicat-ed that as hepatic encephalopathy developed, concentrations of almost all amino acids inplasma and brain were increased.The levels of most amino acids in brain showed no cor-relation with their changes in the plasma.However,changes of concentrations of theseamino acids in brain that were related to the development of hepatic encephalopathy wereclosely correlated with their concentrations in plasma.Not any correlations between chan-ges of any amino acids in plasma and brain were found in normal control rats.Theseresults suggested that amino acid transport mechanisms appeared to be specific in the blo-cd-brain barrier during fulminant hepatic failure,a phenomenon that could contribute tothe neural disturbance of hepatic encephalopathy.