Gut microbiota-mediated betaine regulates skeletal muscle fiber type transition by affecting m6A RNA methylation and Myh7 expression
文献类型： 外文期刊
作者： Yan, Chao 1 ; Yao, Yilong 2 ; Zhang, Zhaobo 1 ; Li, Fanqinyu 1 ; Fan, Danyang 1 ; Liu, Wen 5 ; Fan, Xinhao 1 ; Xu, Lingna 1 ; Liu, Yanwen 1 ; Wang, Shilong 1 ; Hu, Mengling 1 ; Yang, Yalan 1 ; Tang, Zhonglin 1 ;
作者机构： 1.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Key Lab Livestock & Poultry Multiomics MARA, Shenzhen Branch,Guangdong Lab Lingnan Modern Agr, Shenzhen, Peoples R China
2.Chinese Acad Agr Sci, Kunpeng Inst Modern Agr Foshan, Agr Genom Inst, Foshan, Peoples R China
3.Huazhong Agr Univ, Key Lab Agr Anim Genet Breeding & Reprod, Minist Educ, Wuhan, Peoples R China
4.Huazhong Agr Univ, Key Lab Swine Genet & Breeding, Minist Agr & Rural Affairs, Wuhan, Peoples R China
5.Univ Connecticut, Dept Mol Biol & Biophys, Hlth Ctr, Farmington, CT USA
关键词： Betaine; gut microbiota; myofiber-type transition; Myh7; m(6)A RNA methylation
期刊名称：GUT MICROBES （ 影响因子：11.0； 五年影响因子：13.4 ）
ISSN： 1949-0976
年卷期： 2025 年 17 卷 1 期
页码：
收录情况： SCI
摘要： Skeletal muscle fiber composition is essential for maintaining muscle function and overall health. Growing evidence underscores the pivotal role of the gut-muscle axis in mediating the influence of gut microbiota on skeletal muscle development. However, the mechanisms underlying microbiota-mediated regulation of skeletal muscle fiber type remain unclear. Here, we employed multi-omics approaches, including RNA-seq, MeRIP-seq, 16S rRNA gene sequencing, and metabolomics, to investigate the causal relationship between the gut microbiota and skeletal muscle fiber transition. Our results demonstrate that the gut microbiota modulates skeletal muscle fiber transition by influencing N6-methyladenosine (m(6)A) methylation to regulate the expression of the slow-twitch fiber marker Myh7. Specifically, METTL3-dependent m(6)A methylation enhances Myh7 gene expression, leading to an increased proportion of slow-twitch fibers and a reduction in fast-twitch fibers. Furthermore, the microbiota-derived methyl donor betaine promotes Myh7 expression and Akkermansia muciniphila (AKK) abundance, and facilitates fast-to-slow fiber conversion via m(6)A modification. The transplantation of AKK significantly altered betaine levels and m(6)A modification, thereby promoting muscle fiber remodeling. In conclusion, these findings reveal that AKK-coordinated betaine drives skeletal muscle fiber conversion by modulating Myh7 mRNA expression. This study provides novel insights into the role of m(6)A RNA methylation in the gut-muscle crosstalk, highlighting potential therapeutic targets for muscle-related disorders.
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