Chinese medicinal formula Guanxin Shutong capsule protects the heart against oxidative stress and apoptosis induced by ischemic myocardial injury in rats

Cao,Yanjun; He,Xu; Lui,Feng; Huang,Zhuangzhuang; Zhang,Yanmin

doi:10.3892/etm.2014.1540

Chinese medicinal formula Guanxin Shutong capsule protects the heart against oxidative stress and apoptosis induced by ischemic myocardial injury in rats

Authors:
- Yanjun Cao
- Xu He
- Feng Lui
- Zhuangzhuang Huang
- Yanmin Zhang
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Affiliations: School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China, School of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712046, P.R. China
Published online on: February 13, 2014 https://doi.org/10.3892/etm.2014.1540
Pages: 1033-1039

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Abstract

Guanxin Shutong capsule (GXSTC) is a Chinese medicinal formula that has been used clinically for the treatment of chest pain, depression, palpitation and cardiovascular diseases in China for almost 10 years. The aim of the present study was to investigate the protective mechanisms against oxidative stress and apoptosis that GXSTC exhibits in the hearts of rats with myocardial ischemia (MI). Infarct size and the levels of marker enzymes, including serum creatine kinase‑isoenzyme (CK‑MB), lactate dehydrogenase (LDH) and glutamate oxaloacetic transaminase (GOT), as well as the levels of nitric oxide (NO) and NO synthase (NOS) in the heart were measured by biochemical analysis assays. Levels of the antioxidants superoxide dismutase (SOD), catalase (CATA), and glutathione (GSH), and the oxidative stress marker malondialdehyde (MDA), were also determined. Following a 6‑week period of ischemia, myocardial apoptosis, as well as the protein and mRNA expression of NADPH oxidase, was evaluated. Myocardial NADPH oxidase activity was measured by protein expression of p47phox and gp91phox using western blot analysis and mRNA expression of p22phox, p47phox, p67phox and gp91phox using reverse transcription polymerase chain reaction. The results showed that daily oral treatment of the rats with GXSTC reduced infarct size, myocardial apoptosis, the levels of serum MDA, LDH, CK‑MB and GOT and heart GOT, and increased the activities of total SOD, CATA, NOS and the levels of NO and GSH compared with those in vehicle‑treated MI model rats. Administration of GXSTC for 6 weeks also reduced the mRNA expression of the NADPH oxidase subunits p47phox and gp91phox protein, as well as the expression of Bax and caspase‑3 proteins. By contrast, Bcl‑2 protein expression increased. In conclusion, the results demonstrate that GXSTC attenuates myocardial injury via antioxidative and antiapoptotic effects.

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