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New roles of N6-methyladenosine methylation system regulating the occurrence of non-alcoholic fatty liver disease with N6-methyladenosine-modified MYC

文献类型： 外文期刊

作者： Cheng, Wenli 1 ; Li, Min 1 ; Zhang, Luyun 1 ; Zhou, Cheng 1 ; Yu, Susu 1 ; Peng, Xinyue 1 ; Zhang, Wenji 2 ; Zhang, Wenjuan 1 ;

作者机构： 1.Jinan Univ, Sch Med, Dept Publ Hlth & Prevent Med, Guangzhou, Peoples R China

2.Guangdong Acad Agr Sci, Crops Res Inst, Guangdong Prov Engn & Technol Res Ctr Tobacco Bree, Guangzhou, Peoples R China

关键词： non-alcoholic fatty liver disease (NAFLD); non-alcoholic steatohepatitis (NASH); N6-methyladenosine (m6A); RNA methylation; MYC

期刊名称：FRONTIERS IN PHARMACOLOGY （ 影响因子：5.988； 五年影响因子：6.455 ）

ISSN：

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： Non-alcoholic fatty liver disease (NAFLD) has become a major chronic disease in contemporary society, affected by N6-methyladenosine (m6A) RNA methylation, one of the most common RNA modifications. Compared with healthy control, m6A RNA methyltransferase 3 (METTL3) and METTL14 increased, while Wilms tumor 1-associated protein (WTAP) and RNA-binding motif protein 15 (RBM15) decreased significantly in NAFLD, and the m6A demethylases fat mass and obesity-associated protein (FTO) elevated. Meanwhile, the m6A binding proteins, YT521-B homology (YTH) domain-containing 1 (YTHDC1), YTHDC2, insulin-like growth factor 2 mRNA binding protein 1 (IGF2BP1), heterogeneous nuclear ribonucleoprotein C (HNRNPC), and HNRNPA2B1 were decreased, while eukaryotic translation initiation factor 3 subunit H (EIF3H) was increased significantly. All these changes of m6A regulators had significant differences between healthy control and NAFLD, but no differences between the NAFL and NASH group. The expression level of RBM15, HNRNPC, and HNRNPA2B1 were related to body fat index. RBM15, YTHDC2, HNRNPC, HNRNPA2B1, and EIF3H were related to steatosis. Also, KIAA1429 and YTH domain family 1 (YTHDF1) were related to lobular inflammation. Taken together, m6A regulators were involved in the occurrence of NAFLD. More importantly, abnormal MYC was determined as a key link to m6A regulation of NAFLD. The higher MYC mRNA level was accompanied by higher HDL cholesterol and unsaturated fatty acid proportions, as well as lower fat mass, glucose, and transaminase. Taken together, dysregulation of m6A methylation caused steatosis and fibrosis, affecting the occurrence of NAFLD, and MYC might be its potential target.

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