Hypolipidemic effect and mechanism of Semen Astragali Complanati on hyperlipidemia rats with kidney-yang deficiency pattern
10.3969/j.issn.1006-2157.2016.12.006
- VernacularTitle:沙苑子对肾阳虚高脂血症大鼠的降脂作用及机制研究
- Author:
Jing LIU
1
;
Jingxia WANG
;
Fei GAO
;
Xiaoran TANG
;
Siming LI
;
Tianheng SUN
;
Chunguang ZHANG
;
Jianjun ZHANG
Author Information
1. 北京中医药大学 北京 100029
- Keywords:
Semen Astragali Complanati;
estrogen;
estrogen receptor;
blood lipid metabolism;
rats
- From:
Journal of Beijing University of Traditional Chinese Medicine
2016;39(12):998-1005
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the effect of water extracts from Semen Astragali Complanati (Flatstem Milkvetch Seed,hereinafter“SAC”)on lipid metabolism in hyperlipidemia model rats with kidney-yang deficiency pattern,so as to try to discover the mechanism.Methods Female 10-week-old SD rats were randomly divided into six groups (each n =10):normal group,model group,estrogen group,SAC low-dose group,SAC mid-dose group and SAC high-dose group.The rat model was induced by bilateral ovariectomization combined with high-fat diet feeding.And rats of normal group and model group were in-tragastrically (i.g.)administered with saline,those of estrogen group were i.g.with estradiol valerate (0.2 mg/kg),and three SAC groups were i.g.with SAC extract at the dose of 34,68 and 136 mg/kg for consecutive 8 weeks.The body weight of rats were recorded,serum TC,TG,HDL-C and LDL-C were measured and serum E2 ,FSH and estrogen receptors (ERα,ERβ)mRNA in liver tissue were de-tected.Results Compared with the normal group,the body weight of rats of model group increased sig-nificantly after three weeks’high-fat feeding (P <0.001 );from Week 5 the level of total cholesterol (TC)and low density lipoprotein cholesterol(LDL-C)increased significantly (P <0.001 or P <0.01), and from Week 7 triglyceride(TG)and high density lipoprotein cholesterol(HDL-C)also did (P <0.001 or P <0.05);serum E2 significantly decreased (P <0.01),and follicle stimulating hormone(FSH)in-creased (P <0.05),the expression of ER-αmRNA in liver significantly decreased(P <0.05).High dose of SAC significantly reduced the serum level of TG and TC from Week 7 (P <0.05 or P <0.001), middle dose of SAC reduced the level of LDL-C and increased HDL-C significantly at the same time point (P <0.05,P <0.01),and a more week later,the low dose increased the serum level of HDL-C (P <0.05).Despite the levels of E2 and FSH of model rats showed no significant difference after treatment by SAC (P >0.05),the expression of ER-αmRNA in liver tissue increased in all SAC groups (P <0. 05).Conclusion The effect of regulating blood lipid metabolism of SAC had been proved.The poten-tial mechanism could be via upregulating the expression of estrogen receptors to amplify the signals trans-mitted by the receptors,which may make up the low estrogen level to direct at the disorder of lipid metab-olism during peri-menopausal period.
