Human gut microbiome impacts skeletal muscle mass via gut microbial synthesis of the short‐chain fatty acid butyrate among healthy menopausal women

Journal of Cachexia, Sarcopenia and Muscle

Bo‐Yang Li¹  Hong‐Wen Deng¹  Hui‐Min Liu¹  Xiang Qiu¹  Wan‐Qiang Lv¹  Wen‐Di Shen¹  Hong‐Mei Xiao¹  Xu Lin²  Jie Shen²  Chang‐Li Ge³  Feng‐Ye Lv³  Hui Shen⁴ 

[1] Center for System Biology, Data Sciences, and Reproductive Health, School of Basic Medical Science Central South University Changsha Hunan China;Department of Endocrinology and Metabolism The Third Affiliated Hospital of Southern Medical University Guangzhou China;LC‐Bio Technologies Co., Ltd. Hangzhou China;Tulane Center of Biomedical Informatics and Genomics, Deming Department of Medicine Tulane University School of Medicine New Orleans LA USA;

关键词: Gut microbiome;    Host genetics;    Gut microbial synthesis of the SCFA butyrate;    Skeletal muscle mass;   

DOI  :  10.1002/jcsm.12788

来源: DOAJ

【 摘 要 】

Abstract Background Increasing evidence suggests that human gut microbiome plays an important role in variation of skeletal muscle mass (SMM). However, specific causal mechanistic relationship of human gut microbiome with SMM remains largely unresolved. Understanding the causal mechanistic relationship may provide a basis for novel interventions for loss of SMM. This study investigated whether human gut microbiome has a causal effect on SMM among Chinese community‐dwelling healthy menopausal women. Methods Estimated SMM was derived from whole‐body dual‐energy X‐ray absorptiometry. We performed integrated analyses on whole‐genome sequencing, shotgun metagenomic sequencing, and serum short‐chain fatty acids (SCFAs), as well as available host SMM measurements among community‐dwelling healthy menopausal women (N = 482). We combined the results with summary statistics from genome‐wide association analyses for human gut microbiome (N = 952) and SMM traits (N = 28 330). As a prerequisite for causality, we used a computational protocol that was proposed to measure correlations among gut metagenome, metabolome, and the host trait to investigate the relationship between human gut microbiome and SMM. Causal inference methods were applied to assess the potential causal effects of gut microbial features on SMM, through one‐sample and two‐sample Mendelian randomization (MR) analyses, respectively. Results In metagenomic association analyses, the increased capacity for gut microbial synthesis of the SCFA butyrate was significantly associated with serum butyrate levels [Spearman correlation coefficient (SCC) = 0.13, P = 0.02] and skeletal muscle index (SCC = 0.084, P = 0.002). Of interest was the finding that two main butyrate‐producing bacterial species were both positively associated with the increased capacity for gut microbial synthesis of butyrate [Faecalibacterium prausnitzii (SCC = 0.25, P = 6.6 × 10−7) and Butyricimonas virosa (SCC = 0.15, P = 0.001)] and for skeletal muscle index [F. prausnitzii (SCC = 0.16, P = 6.2 × 10−4) and B. virosa (SCC = 0.17, P = 2.4 × 10−4)]. One‐sample MR results showed a causal effect between gut microbial synthesis of the SCFA butyrate and appendicular lean mass (β = 0.04, 95% confidence interval 0.029 to 0.051, P = 0.003). Two‐sample MR results further confirmed the causal effect between gut microbial synthesis of the SCFA butyrate and appendicular lean mass (β = 0.06, 95% confidence interval 0 to 0.13, P = 0.06). Conclusions Our results may help the future development of novel intervention approaches for preventing or alleviating loss of SMM.

【 授权许可】

Unknown