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- W3147250012 abstract "The traditional Chinese medicine Shensong Yangxin(SSYX) can improve the clinical symptoms of arrhythmia in an integrated manner. This study aimed to investigate the electrophysiological effect of SSYX on the hearts of myocardial-infarcted rabbits and further explore the mechanism by which SSYX alleviates myocardial fibrosis. Myocardial infarction(MI) was established in rabbits by ligation of the left circumflex coronary. The rabbits were treated with SSYX(0.5 g/kg/d) or saline for 8 weeks by oral administration. Microelectrode array(MEA) technology was used in vivo for extracellular electrophysiological recordings of the infarct border zone. Masson’s trichrome staining was used to observe myocardial fibrosis. Western blotting was performed to evaluate the protein expression levels of collagen Ⅰ(COL Ⅰ) and collagen Ⅲ(COL Ⅲ). Quantitative real-time polymerase chain reaction(real-time PCR) was performed to evaluate the TGF-β1 and MMP-2 m RNA expression levels. The results showed that the total activation time(TAT) and the dispersion of TAT were significantly increased and the excitation propagation markedly disordered after MI. SSYX could significantly decrease TAT and the dispersion of TAT, and significantly ameliorate the chaotic spread pattern of excitation. Furthermore, SSYX treatment could significantly decrease COL Ⅰ and COL Ⅲ protein levels and down-regulate TGF-β1 and MMP-2 m RNA expression levels in MI rabbits. It was concluded that SSYX may ameliorate cardiac electrophysiological abnormalities in infarcted hearts by decreasing the protein levels of COL Ⅰ and COL Ⅲ, down-regulating the m RNA expression levels of TGF-β1 and MMP2, and thereby reducing adverse cardiac remodeling." @default.
- W3147250012 created "2021-04-13" @default.
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- W3147250012 date "2016-01-01" @default.
- W3147250012 modified "2023-09-22" @default.
- W3147250012 title "Shensong Yangxin （SSYX） Ameliorates Disordered Excitation Transmission by Suppressing Cardiac Collagen Hyperplasia in Rabbits with Chronic Myocardial Infarction" @default.
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