Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (3): 568-578.DOI: 10.3969/j.issn.1004-1524.20240197

• Animal Science • Previous Articles     Next Articles

Clostridium butyricum affects muscle fiber type in mice by modulating colonic microbial structure and short-chain fatty acids content

WU Xingfeng1,2(), XIAO Yingping2, LYU Wentao2, MA Lingyan2, CHEN Qu2, WEN Yang2, XU E1,*()   

  1. 1. Key Laboratory of Genetics, Breeding and Reproduction of Plateau Mountain Animals, Ministry of Education, School of Animal Science, Guizhou University, Guiyang 550025, China
    2. State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:2024-02-29 Online:2025-03-25 Published:2025-04-02

Abstract:

In order to investigate the effects of Clostridium butyricum on muscle fiber types, colonic microbial structure and short-chain fatty acids content in mice, fourteen C57BL/6J male mice were selected and divided into CB and NC groups randomly with 7 mice in each group. The mice in CB group were treated by oral gavage with 200 μL C. butyricum suspension (108 CFU·mL-1) for 8 weeks, while the mice in the NC group were given an equal amount of saline. Real-time fluorescence quantitative PCR (RT-qPCR), 16S rRNA gene sequencing and gas chromatography were used to determine the changes of muscle fiber type gene expression, intestinal microflora structure and short-chain fatty acids content in gastrocnemius muscle of mice. It was shown that the difference in muscle fiber diameter between the NC and CB groups was not significant, yet the cross-sectional area of gastrocnemius muscle fibers was significantly (P<0.05) increased in the CB group than that in the NC group. Compared with the NC group, mRNA levels of MyHC I and MyHC IIa were significantly increased in the CB group, yet the mRNA level of MyHC IIb was significantly decreased. The abundance of Bacteroidota and Proteobacteria in the intestine of the CB group was significantly increased than that of the NC group, yet the abundance of Firmicutes in the CB group was significantly decreased. The abundance of Roseburia, Bacteroides, Parabacteroides were significantly increased in the CB group than that of the NC group. The interactions between the intestinal microflora of mice in the CB group were more closely related than those in the NC group. Metabolic pathways such as citrate cycle, pantothenate and coenzyme A (CoA) biosynthesis, fatty acid biosynthesis, and fatty acid metabolism were significantly activated in the intestinal microflora of the CB group as compared with the NC group. The contents of total short-chain fatty acids, acetic acid and butyric acid in the colon of CB group were significantly higher than those in the NC group. In conclusion, Clostridium butyricum treatment affected the expression of genes related to muscle fiber types in mice by regulating the intestinal microflora and short-chain fatty acids produced by the bacteria, hence promoted the transformation of muscle fiber types.

Key words: Clostridium butyricum, muscle fiber type, intestinal microflora, short-chain fatty acid

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