细胞生物学
生物
干细胞
祖细胞
下调和上调
激酶
细胞凋亡
癌症研究
程序性细胞死亡
衰老
遗传学
基因
作者
Tatsufumi Mori,Yuta Onodera,Mansho Itokazu,Toshiyuki Takehara,Kanae Shigi,Natsumi Iwawaki,Masao Akagi,Takeshi Teramura
标识
DOI:10.1016/j.mad.2022.111619
摘要
Frailty of the locomotory organs has become a widespread problem in the geriatric population. The major factor leading to frailty is an age-associated decrease in muscular mass and a reduced number of muscular cells and myofibers. In aged muscular tissues, muscular satellite cells (MuSCs) are reduced due to abnormalities in their self-renewal and the induction of apoptosis. However, the molecular mechanisms connecting aging-associated physiological changes and the reduction of MuSCs are largely unknown. NIMA-related kinase 2 (Nek2), a member of the Nek family of serine/threonine kinases, was found to be downregulated in aged MuSCs/progenitors. Further, Nek2 downregulation was found to inhibit self-renewal and apoptotic cell death by activating the p53-dependent checkpoint. Attenuated NEK2 expression was also observed in the muscular tissues of elderly donors, and its function was confirmed to be conserved in humans. Overall, this study proposes a novel mechanism for inducing muscular atrophy to understand aging-associated muscular diseases.
科研通智能强力驱动
Strongly Powered by AbleSci AI