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| 論文調査委員 |
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| 本文言語 |
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| 学位授与年度 |
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| 学位授与大学 |
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| 学位 |
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| 概要 |
Myogenic progenitor/stem cells retain their skeletal muscle differentiation potential by maintaining myogenic transcription factors such as MyoD. However, the mechanism of how MyoD expression is maint...ained in proliferative progenitor cells has not been elucidated. Here, we found that MyoD expression was reduced at the mRNA level by cell cycle arrest in S and G2 phases, which in turn led to the absence of skeletal muscle differentiation. The reduction of MyoD mRNA was correlated with the reduced expression of factors regulating RNA metabolism, including methyltransferase like 3 (Mettl3), which induces N6-methyladenosine (m6A) modifications of RNA. KnockdownofMettl3 revealed thatMyoDRNAwas specificallydownregulated and that this was caused by a decrease in processed, but not unprocessed, mRNA. Potential m6A modification sites were profiled by m6A sequencing and identified within the 50 untranslated region (UTR) of MyoD mRNA. Deletion of the 50 UTR revealed that it has a role in MyoD mRNA processing. These data showed that Mettl3 is required for MyoD mRNA expression in proliferative myoblasts.続きを見る
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Mendeley出力
med3069