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ATAD2 is a Novel Regulator of Myogenesis and Autophagy in Skeletal Muscles

GSE328851 Mus musculus Expression profiling by high throughput sequencing 8 samples Submitted 2026/04/27 Platform GPL24247
Summary
MYTHO protein is a recently described novel regulator of autophagy and mass in skeletal muscles. Using immunoprecipitation assay, we found that the nuclear protein ATAD2 (ATPase family AAA domain containing 2) interacts with MYTHO protein in C2C12 myoblasts. The functional role of ATAD2 in skeletal muscle cells was assessed by using transient and stable Atad2 knockdown (KD) in C2C12 myoblasts. Atad2 KD significantly increased myoblast proliferation rate, S-phase entry, overall cell viability, and early differentiation into myotubes. However, Atad2 KD also elicited myotube atrophy and accumulation of autophagy-related proteins due to inhibition of autophagosome fusion with lysosomes and/or lysosome dysfunction. LAMP1 staining confirmed the presence of enlarged lysosomes in Atad2 KD cells. Additionally, genes involved in lysosome function and integrity including Rab7, Rab29, Nrbf2, and Cathepsin L were downregulated in Atad2 KD cells. Collectively, these results indicate that ATAD2 is a critical regulator of muscle cell proliferation, differentiation, and autophagy.
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Also filed as BioProject PRJNA1456867 and SRA study SRP694147. Searching any of these in the dataset finder brings you back here.

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