Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (7): 3357-3367.doi: 10.11843/j.issn.0366-6964.2025.07.028

• Animal Nutrition and Feeds • Previous Articles     Next Articles

Effects of Selenium Polysaccharides on Oxidative Damage of Equine Skeletal Muscle Satellite Cell

LIU Yumeng(), GAO Xing, ZHAO Yali, CAO Di, MANG Lai, ZHANG Xinzhuang*()   

  1. Key Laboratory of Equine Animal Industry Innovation, Ministry of Agriculture, Inner Mongolia Agricultural University, Hohhot 010018, China
    Rural Affairs/Inner Mongolia Key Laboratory of Equine Animal Scientific Research, Inner Mongolia Agricultural University, Hohhot 010018, China
    Technological Innovation/Inner Mongolia Agricultural University, Equine Animal Research Center, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China
  • Received:2024-08-29 Online:2025-07-23 Published:2025-07-25
  • Contact: ZHANG Xinzhuang E-mail:1622969534@qq.com;ZhangXinZhuang@126.com

Abstract:

The aim of this study was to investigate the protective effect and mechanism of selenium (Se) polysaccharide (Sepol) preprotection on H2O2-induced oxidative stress in Mongolian horse skeletal muscle satellite cells, and to provide a reference for the development of antioxidants to alleviate exercise injury in horse skeletal muscle.The oxidative injury model of Mongolian horse skeletal muscle satellite cells was induced by H2O2 and used to perform the experiment. The experiment was divided into control group, H2O2 injury group and selenium polysaccharide protection groups (concentrations of selenium polysaccharide protection group were 50, 150, 250, 350, 450, 550 nmol ·L-1, respectively). Cell viability, antioxidant activity, antioxidant gene expression and mitochondrial function were measured.The results showed that: Cell viability, total antioxidant capacity (T-AOC), activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) increased first and then decreased with the increase of pre-protective concentration of seleniumpolysaccharide. The cell survival rate of 350 nmol ·L-1 Se polysaccharide preprotection group was significantly higher than that of injury group (P < 0.05) and there was no significant difference between 350 nmol ·L-1 Se polysaccharide preprotection group and control group, but the activity of antioxidant enzymes was significantly higher than that of injury group and control group (P < 0.05). The content of malondialdehyde (MDA) in cells decreased first and then increased with the increase of Se polysaccharide. The content of MDA in 350 nmol ·L-1 Se polysaccharide preprotection group was the lowest, which was significantly lower than that in control group and injury group (P < 0.05).The mRNA expression of proto-oncogene RELA(RELA proto-oncogene, RELA), glutathione peroxidase (probable phospholipid hydroperoxide glutathione peroxidase, GPX), thioredoxin reductase 1 (TRXR 1 ) and superoxide dismutase 1 (SOD 1 ) in the 350 nmol ·L-1 selenium polysaccharide pre-protected group was highly significant higher than that of the injured group (P < 0.01). The mRNA expression of RELA was significantly higher than that of the control group (P < 0.05), the mRNA expression of GPX, TRXR1 and SOD1 was extremely significantly higher than those of the control group (P < 0.01). mRNA expression of the nuclear factor-like erythroid 2-related factor 2 (Nrf2 ) in the 350 nmol ·L-1 selenium polysaccharide preprotected group was significantly higher than that of the other two selenium polysaccharide preprotected groups (P < 0.05).The oxygen consumption rate (OCR) of 350 nmol ·L-1selenosaccharide group was significantly higher than that of H2O2injury group (P < 0.05).The basal respiration, ATP consumption, proton leak and maximal respiration were 34.86, 26.06, 8.80 and 32.41, respectively, which were significantly higher than those of H2O2 injury group (P < 0.01). The non-mitochondrial respiration value was significantly higher than that of the injury group (P < 0.05).In conclusion, selenium polysaccharide can alleviate oxidative damage of horse skeletal muscle satellite cells by activating Nrf2 signaling pathway and up-regulating the expression of downstream antioxidant genes, thereby improving antioxidant enzyme activity, reducing MDA content, promoting mitochondrial respiratory function, and improving cell activity. Under the current experimental conditions, 350 nmol ·L-1 selenium polysaccharide had the best effect.

Key words: selenium polysaccharide, horse, skeletal muscle satellite cells, oxidative damage

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