Effects of tanshinone B regulating LRP6/Wntl/p-catenin pathway on cognitive function of mice with vascular dementia
10.3969/j.issn.1001-1978.2022.02.018
- Author:
Ming-Deng YE
1
;
Jing-Ying WANG
1
;
Fei YU
1
;
Yuan ZHOU
2
;
Yu-Jie CHENG
2
;
Ming CHEN
2
Author Information
1. Nanjing Second Hospital Affiliated to Nanjing University of Traditional Chinese Medicine, Dept of Pharmacy
2. School of Basic Medical Sciences, Anhui Medical University, Dept of Pharmacology
- Publication Type:Journal Article
- Keywords:
cognitive function;
donepezil;
LRP6/Wnt1/β-catenin;
MDA;
tanshinone B;
vascular dementia
- From:
Chinese Pharmacological Bulletin
2022;38(2):255-260
- CountryChina
- Language:Chinese
-
Abstract:
Aim To explore the protective mechanism of tanshinone B on cognitive dysfunction in mice with vascular dementia.Methods C57BL/6 male mice were divided into control group, vascular dementia model group(VD group), tanshinone B group(TSB 2,4,8 mg·kg-1), donepezil hydrochloride group(1 mg·kg-1), according to the random number table method.The VD model was constructed by the coarctation of bilateral common carotid arteries in mice.Ten days after the successful modeling, the low, medium, and high-dose tanshinone B groups were intraperitoneally injected with tanshinone B, the positive control medicine group was intraperitoneally injected with donepezil hydrochloride, once a day, and the mice in control group and VD group were injected intraperitoneally with the same amount of normal saline for 20 d.Morris water maze test was used to detect the learning and memory ability of mice in each group; the cortex and hippocampus of each group were separated, and MDA, SOD and GSH-Px were determined by spectrophotometry; the pathological changes in the hippocampus of each group were observed by HE staining.The expression of p-LRP6, LRP6, Wnt1 and β-catenin protein in the hippocampus of each group of mice were detected by Western blot.Results Compared with control group, the ability of memory was reduced, the content MDA increased(P<0.01), SOD and GSH-Px activities decreased(P<0.01), and significant pathological damage in hippocampus, the expression of p-LRP6, Wnt1, and β-catenin protein was significantly reduced in VD group(P<0.01).Compared with VD group, the learning and memory abilities of the mice were improved, the content of MDA decreased(P<0.01), the activities of SOD and GSH-Px increased(P<0.01), and the pathological damage in hippocampus was significantly improved.The expression of Wnt1 and β-catenin protein increased significantly in TSB treatment group(P<0.01).Conclusions TSB can improve the cognitive dysfunction of VD mice, and its mechanism may be related to the activation of the LRP6/Wnt1/β-catenin pathway in hippocampus.
