RESUMO
Objective: To observe the changes of behavior and mitochondria in Alzheimer's disease(AD) rats, and to explore the mechanism of Sijunzi Tang in the treatment of AD rats' behavior and the changes of mitochondrial energy metabolism in hippocampal neurons. Method: The 60 male SPF grade rats were randomly divided into normal group, model group, low, medium and high dose group of Sijunzi Tang(3.24, 6.48,12.56 g·kg-1), and dihydroergot group (0.27 mg·kg-1), 10 rats in each group. The normal group received no intervention and had a normal diet. The rest of the rats were injected with D-galactose to the abdomen at a dose of 200 mg·kg-1 once a day for 6 weeks. Morris water maze experiment was used to detect the cognitive function of rats. Tm-Vision behavioral experiment system was used to observe the behavioral changes of rats, and the hippocampal neuronal line structure was observed by transmission electron microscope. Mitochondrial complex colorimetry was adopted to detect rats CⅠ, CⅡ, CⅢ, CⅣ activity.Western blot was used to detect the expression of mitochondrial adenosine monophosphate-activated protein kinase(AMPK) protein in the hippocampus. Result: Compared with normal group, model group rats latent escape period time increasing, through fewer, movement distance, movement time increasing, center residence time increased (PPPPPPPPPPPPConclusion: The abnormal behavior of AD rats may be related to the decrease of central hippocampal energy metabolism and mitochondrial function. Sijunzi Tang has therapeutic effect.