Dkk3 dependent transcriptional regulation controls age related skeletal muscle atrophy.

Dkk3 dependent transcriptional regulation controls age related skeletal muscle atrophy.
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Dkk3 依赖性转录调控控制

DOI:
10.1038/s41467-018-04038-6
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发表时间:
2018-05-01
影响因子:
16.6
通讯作者:
Hu P
Hu P
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Yin J;Yang L;Xie Y;Liu Y;Li S;Yang W;Xu B;Ji H;Ding L;Wang K;Li G;Chen L;Hu P

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年龄相关性肌肉萎缩(肌肉减少症)是老年人致残的主要原因,但其潜在的分子机制尚不清楚。在这里,我们确定了分泌糖蛋白dickkopf3 (Dkk3)在肌肉减少症中的新作用。在幼鼠肌肉中强迫表达dkk3会导致肌肉萎缩。相反,减少它在老肌肉中的表达可以恢复肌肉大小和功能。Dkk3诱导β-catenin的核输入,增强其与FoxO3的相互作用,进而激活E3泛素连接酶efbxo32和trim63的转录,导致肌肉萎缩。这些发现表明,Dkk3可以作为年龄相关性肌肉萎缩的诊断标记和治疗靶点,并揭示了Fbxo32和Trim63的独特转录控制。
Age-related muscle atrophy (sarcopenia) is the leading cause for disability in aged population, but the underlying molecular mechanisms are poorly understood. Here we identify a novel role for the secreted glycoprotein Dickkopf 3 (Dkk3) in sarcopenia. Forced expression ofDkk3in muscles in young mice leads to muscle atrophy. Conversely, reducing its expression in old muscles restores both muscle size and function. Dkk3 induces nuclear import of β-catenin and enhances its interaction with FoxO3, which in turn activates the transcription of E3 ubiquitin ligaseFbxo32andTrim63, driving muscle atrophy. These findings suggest that Dkk3 may be used as diagnostic marker and as therapeutic target for age-related muscle atrophy, and reveal a distinct transcriptional control of Fbxo32 and Trim63.
DOI: 10.1083/jcb.201310035
发表时间: 2014-04-14
期刊: The Journal of cell biology
影响因子: --
作者:
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