The impact of celastrol on cognitive function and the expression of Cdk5, p25 and p35 in hippocampus in APPswe/PS1dE9 double transgenic mouse after partial hepatectomy / 临床麻醉学杂志

ABSTRACT

Objective To investigate the impact of celastrol on cognitive function and the ex-pression of Cdk5/p25 in hippocampus in APPswe/PS1dE9 double transgenic mouse after partial hepa-tectomy.Methods Three-month-old APPswe/PS1dE9 double transgenic mice (n=96)were randomly divided into surgery group (partial hepatectomy,group S),celastrol group (celastrol and partial hepa-tectomy,group C)and DMSO group (DMSO and partial hepatectomy,group O).Eight mice were se-lected randomly in each group and were Morris-water maze trained for 5 continuous days.Their learn-ing and memory abilities were evaluated at 1,3,7 and 14 d after the surgery,respectively.For the remaining mice in each group,the hippocampus were collected and the changes of Cdk5,p35 and p25 in hippocampus were measured by western blot at the time 1,3,7,14 d after partial hepatectomy. Six mice were killed at each time for data collection.Results The average escape latency of group C was significantly shorter than those of groups S and O at 3,7 and 14 d after partial hepatectomy (P <0.05).The percentages of time in target quadrant of groups S and O decreased significantly than that in group C (P <0.05).Western blot showed the expression of Cdk5 in group C was significantly low-er than that in groups S and O at 3,7 and 14 d after partial hepatectomy (P <0.05),and the same re-sult was also found in the expression of p25 at 1,3,7 and 14 d after partial hepatectomy (P <0.05). There was no significant difference in the expression of p35 between each group.Conclusion Celas-trol can improve the learning and memory ability in APPswe/PS1dE9 the double transgenic mouse, with the mechanism may be related to the decrease of Cdk5 and p25 in hippocampus.