Details

Autor(en) / Beteiligte

• Englund, Davis A.
• Jolliffe, Alyssa
• Aversa, Zaira
• Zhang, Xu
• Sturmlechner, Ines
• Sakamoto, Ayumi E.
• Zeidler, Julianna D.
• Warner, Gina M.
• McNinch, Colton
• White, Thomas A.
• Chini, Eduardo N.
• Baker, Darren J.
• van Deursen, Jan M.
• LeBrasseur, Nathan K.

Titel

p21 induces a senescence program and skeletal muscle dysfunction

Ist Teil von

• Molecular metabolism (Germany), 2023-01, Vol.67, p.101652-101652, Article 101652

Ort / Verlag

Germany: Elsevier GmbH

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Recent work has established associations between elevated p21, the accumulation of senescent cells, and skeletal muscle dysfunction in mice and humans. Using a mouse model of p21 overexpression (p21OE), we examined if p21 mechanistically contributes to cellular senescence and pathological features in skeletal muscle. We show that p21 induces several core properties of cellular senescence in skeletal muscle, including an altered transcriptome, DNA damage, mitochondrial dysfunction, and the senescence-associated secretory phenotype (SASP). Furthermore, p21OE mice exhibit manifestations of skeletal muscle pathology, such as atrophy, fibrosis, and impaired physical function when compared to age-matched controls. These findings suggest p21 alone is sufficient to drive a cellular senescence program and reveal a novel source of skeletal muscle loss and dysfunction. •p21 induces a transcriptional program in skeletal muscle consistent with a senescence program.•p21 induces core properties of senescence in skeletal muscle, including DNA damage, mitochondrial dysfunction, and the SASP.•Mice that overexpress p21 exhibit signs of muscle pathology, such as atrophy, fibrosis, and impaired physical function.