N6-methyladenosine modification is regulated by methylase and demethylase, resulting in a dynamic and reversible process. Changes in m6A levels are involved in a wide range of cellular processes, including nuclear RNA output, mRNA metabolism, protein translation, and RNA splicing, and have strong associations with various diseases. The purpose of this paper is to generalize and summarize the role and mechanism of the change of m6A expression level in mRNA in three common diseases, as well as the research trend based on the change of m6A level in mRNA as a drug intervention target.

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