06 March 2016 : Animal Research
Effect and Mechanism of QiShenYiQi Pill on Experimental Autoimmune Myocarditis Rats
Shichao LvABCE, Meifang WuBF, Meng LiBE, Qiang WangBF, Ling XuBF, Xiaojing WangBC, Junping ZhangADGDOI: 10.12659/MSM.895655
Med Sci Monit 2016; 22:752-756
Abstract
BACKGROUND: To observe the effect of QiShenYiQi pill (QSYQ) on experimental autoimmune myocarditis rats, and to explore its mechanism of action.
MATERIAL AND METHODS: Lewis rats underwent the injection of myocardial myosin mixed with Freund’s complete adjuvant were randomized into 3 groups: model, valsartan, and QSYQ groups. Rats injected with phosphate-buffered saline (PBS) mixed with Freund’s complete adjuvant were used as the control group. Rats were euthanized at 4 and 8 weeks, and we weighed rat body mass, heart mass, and left ventricular mass. Myocardium sections were stained with hematoxylin and eosin (H&E) and Masson trichrome. Myocardial TGF-β1 and CTGF protein expression was detected by immunohistochemistry, and myocardial TGF-β1 and CTGF mRNA expression was detected by real-time qPCR.
RESULTS: QSYQ reduced HMI and LVMI, as well as the histological score of hearts and CVF, which further decreased over time, and its effect was significantly greater than that of valsartan at 4 and 8 weeks. After 4 weeks, QSYQ inhibited the protein and mRNA expression of TGF-β1 and CTGF, and its effect on lowering CTGF was significantly greater than that of valsartan. In addition, after 8 weeks, QSYQ also inhibited the protein and mRNA expression of CTGF, whereas there was no significant difference in the expression of myocardial TGF-β1.
CONCLUSIONS: This study provides evidence that QSYQ can improve cardiac remodeling of experimental autoimmune myocarditis rats. It also effectively improved the degree of myocardial fibrosis, which is related to the mechanism of regulation of TGF-β1 CTGF.
Keywords: Autoimmune Diseases - pathology, Connective Tissue Growth Factor - metabolism, Drugs, Chinese Herbal - therapeutic use, Gene Expression Regulation - drug effects, Heart Ventricles - pathology, Myocarditis - pathology, Myocardium - pathology, Organ Size, RNA, Messenger - metabolism, Rats, Inbred Lew
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