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PHF2 regulates sarcomeric gene transcription in myogenesis
Taku Fukushima1, Yuka Hasegawa2, Sachi Kuse2
1Department of Physiology, School of Medicine, Aichi Medical University, Nagakute, Aichi, Japan.
Plos One
|May 3, 2024
Summary
The enzyme PHF2 regulates skeletal muscle development by demethylating histone H3 lysine 9 dimethyl (H3K9me2). PHF2 knockout impairs sarcomeric gene expression, crucial for muscle fiber formation.
Area of Science:
- Epigenetics
- Molecular Biology
- Muscle Development
Background:
- Myogenesis, the process of skeletal muscle formation, is primarily controlled by Myogenic Regulatory Factors (MRFs).
- Epigenetic modifications significantly influence MRF transcription, but their specific roles in myogenesis remain unclear.
- PHF2, an epigenomic modification enzyme, is known to demethylate histone 3 lysine 9 dimethyl (H3K9me2).
Purpose of the Study:
- To investigate the role of the epigenomic modification enzyme PHF2 in myogenesis.
- To elucidate the mechanism by which PHF2 regulates skeletal muscle gene expression via H3K9me2 demethylation.
Main Methods:
- Utilized CRISPR/Cas9 to generate Phf2 knockout (KO) C2C12 myoblasts.
- Performed RNA sequencing to analyze global transcriptional changes in Phf2 KO cells post-differentiation.
- Conducted Gene Ontology (GO) analysis to identify affected biological pathways.
Main Results:
- Phf2 mRNA expression and PHF2 protein localization in myoblasts and myotubes were confirmed.
- Phf2 KO significantly impaired the expression of genes involved in skeletal muscle fiber formation and development.
- Expression of key sarcomeric genes (e.g., Myhs, Mybpc2) was reduced in Phf2 KO cells, with increased H3K9me2 modification observed on specific sarcomeric and muscle development genes (Mybpc2, Mef2c, Myh7).
Conclusions:
- PHF2 plays a critical role in regulating gene expression during myogenesis.
- PHF2-mediated demethylation of H3K9me2 is essential for the proper expression of sarcomeric genes.
- These findings highlight PHF2 as a key epigenetic regulator in skeletal muscle development.
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