Protective effects of Guanxin Shutong capsule drug‑containing serum on tumor necrosis factor‑α‑induced endothelial dysfunction through nicotinamide adenine dinucleotide phosphate oxidase and the nitric oxide pathway

Cao,Yanjun; Liu,Feng; Huang,Zhuangzhuang; Zhang,Yanmin

doi:10.3892/etm.2014.1795

Protective effects of Guanxin Shutong capsule drug‑containing serum on tumor necrosis factor‑α‑induced endothelial dysfunction through nicotinamide adenine dinucleotide phosphate oxidase and the nitric oxide pathway

Authors:
- Yanjun Cao
- Feng Liu
- Zhuangzhuang Huang
- Yanmin Zhang
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Affiliations: School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China, Buchang Pharmaceuticals, Xi'an, Shaanxi 710075, P.R. China
Published online on: June 20, 2014 https://doi.org/10.3892/etm.2014.1795
Pages: 998-1004

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Abstract

The Chinese medicinal formula Guanxin Shutong capsule (GXSTC) has been used for almost 10 years as a clinical treatment for chest pain, depression, palpitation and cardiovascular diseases. The aim of this study was to investigate the effects of GXSTC drug‑containing serum on tumor necrosis factor‑α (TNF‑α)‑stimulated endothelial cells. Cell viability was measured by MTT assay, and nitric oxide (NO) levels and NO synthase (NOS) activity were measured as standards of endothelial dysfunction. Malondialdehyde (MDA) levels and superoxide dismutase (SOD) activity were evaluated using commercial kits. In addition, the protein expression of endothelial NOS (eNOS), AKT and nicotinamide adenine dinucleotide phosphate (NADPH) oxidase subunits was examined to evaluate the effect of GXSTC drug‑containing serum on ECV304 cells. GXSTC significantly reversed the decrease in NO production induced by TNF‑α (5 ng/ml) in ECV304 cells. The expression of NADPH oxidase subunits was increased by TNF‑α treatment, but markedly inhibited by treatment with GXSTC in TNF‑α‑stimulated cells. In summary, GXSTC increased the production of NO in ECV304 cells and exerted a protective effect on ECV304 cells stimulated with TNF‑α by upregulating the mRNA and protein expression of eNOS. This was accompanied by increased SOD activity and reduced MDA levels. These results suggested that GXSTC protects the endothelium via the NO pathway and exhibits antioxidant effects.

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