Effect of Different Components of Acorus tatarinowii and Polygala tenuifolia on p-Ser396 and Tau-5 Expression in the Hippocampus of Rats with Alzheimer′s Disease / 医药导报

ABSTRACT

Objective To investigate the different components of Acorus tatarinowii and Polygala tenuifolia(volatile oil, aqueous extract)on the expression of phosphorylated Tau protein at site Ser396 and Tau-5 in the hippocampus of rats with Alzheimer′s disease(AD). Methods Male Sprague Dawley rats were randomly divided into 8 groupsnormal control group, model control group,low-,middle-,and high-dose groups of volatile oil of Acorus tatarinowii and Polygala tenuifolia,and low-, middle-,and high-dose groups of aqueous extract of Acorus tatarinowii and Polygala tenuifolia. The subacute aging model was established by intraperitoneal injection of D-galactose( D-gal). Rats were given different components of Acorus tatarinowii and Polygala tenuifolia(crude drug dosage,0.6,1.2,1.8 g·kg-1 )in experimental groups,and 0.9% sodium chloride solution in normal control group and model control group,by gavage for 28 days.The levels of phosphorylated Tau protein at site Ser396 and Tau-5 were detected in hippocampal tissues by Western blotting and immunohistochemistry. Results The levels of phosphorylated Tau protein at site Ser396 were significantly enhanced in the model control group,as compared with those in normal control group (P0.05). Conclusion Acorus tatarinowii and Polygala tenuifolia could promote the dephosphorylation of Ser396 site of Tau protein in the hippocampus of AD rats,with the aqueous extract component having better effects.