The effect of butylphthalide on expression of VEGF and P38MAPK in hippocampus of Alzheimer's disease rats

Objective To explore the roles of vascular endothelial growth factor (VEGF) and P38MAPK in the pathogenesis of Alzheimer's disease(AD) rats,and the effects of butyIphthalide on the influence of VEGF and P38MAPK in hippocampus of AD rats.Methods SD rats were randomly divided into blank group,AD model group,butylphthalide low-dose group and high dose group (n =8 rats per group).Aggregated Aβ1-42 was injected into the bilateral hippocampus of rats by stereotaxic coordinates method to induce AD.Morris water maze test was used to determine the abilities of learning and memory.Western blotting combined with Gel Doc imagine systems were used to investigate the expression of VEGF and P-P38MAPK in hippocampus of AD rats.Results The result of Morris water maze experiment showed that one week after modeling,escape latency was different(F =66.658,P ＜ 0.05),and either dose the frequency of crossing platform (F =6.884,P ＜0.05).Compared with the blank group,the other three groups'latent period of escape was extended significantly(P ＜ 0.05),and frequency of crossing platform was significantly less (P ＜ 0.05).After drug intervention for 4 weeks,the expression of VEGF was difference(F =171.064,P ＜0.05),it was decreased obviously in the model group than blank group(P ＜=0.05),but it was increased in the drug intervention groups than model group (P ＜ 0.05),and increased more significantly in the high dose group than low dose group (P ＜ 0.05).The expression of P38MAPK had no obvious change among four groups (P ＞ 0.05),however,the expression of P-P38MAPK showed difference(F =104.395,P ＜ 0.05),it was increased in drug intervention and model group than blank group (P ＜ 0.05),it was increased in drug intervention and model group than blank group (P ＜ 0.05),reduced significantly in drug intervention groups than model group (P ＜ 0.05),and decreased more significantly in high dose groups than low dose group (P ＜ 0.05).Conclusions Butylphthalide could obviously enhance the expression of VEGF,reduce the expression of P-P38MAPK in hippocampus of AD rats. Key words: Propiophenones/pharmacology;  Alzheimer disease;  Vascular endothelial growth factors; p38 mitogen-activated protein kinases