The histone code reader Spin1 controls skeletal muscle development.

The histone code reader Spin1 controls skeletal muscle development.
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组蛋白代码读取器SPIN1控制骨骼肌的发育。

DOI:
10.1038/cddis.2017.468
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发表时间:
2017-11-23
影响因子:
9
通讯作者:
Schüle R
Schüle R
中科院分区:
生物学1区
文献类型:
--
作者:
Greschik H;Duteil D;Messaddeq N;Willmann D;Arrigoni L;Sum M;Jung M;Metzger D;Manke T;Günther T;Schüle R

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虽然一些研究将组蛋白编码子Spin1的表达增加与肿瘤的形成或生长联系起来,但对该蛋白的生理功能知之甚少。我们使用Myf5-Cre缺失菌株去除成肌细胞前体中的Spin1,产生了Spin1M5小鼠。大多数Spin1M5小鼠在出生后不久死亡,表现为严重的肌节紊乱和坏死。存活的Spin1M5小鼠生长迟缓,在比目鱼肌、胫骨前肌和膈肌中表现出最突出的缺陷。胚胎日(E) 15.5、E16.5和三周龄肢体肌肉的转录组分析提供了异常胎儿肌肉发生的证据,并确定了骨胳肌(SkM)功能网络失调。对原代成肌细胞全基因组染色质占用率的测定揭示了Spin1的直接靶基因,并表明不受调节的基本螺旋-环-螺旋转录因子网络可解释Spin1M5胎儿的发育缺陷。此外,通过相关的组织学和转录组分析,我们发现titin相关蛋白的异常表达、糖原代谢异常和神经肌肉连接缺陷有助于Spin1M5小鼠SkM病理。总之,我们描述了组蛋白编码读取器控制小鼠SkM发育的第一个例子,这暗示了Spin1在人类SkM疾病中可能起作用。
While several studies correlated increased expression of the histone code reader Spin1 with tumor formation or growth, little is known about physiological functions of the protein. We generated Spin1M5 mice with ablation of Spin1 in myoblast precursors using the Myf5-Cre deleter strain. Most Spin1M5 mice die shortly after birth displaying severe sarcomere disorganization and necrosis. Surviving Spin1M5 mice are growth-retarded and exhibit the most prominent defects in soleus, tibialis anterior, and diaphragm muscle. Transcriptome analyses of limb muscle at embryonic day (E) 15.5, E16.5, and at three weeks of age provided evidence for aberrant fetal myogenesis and identified deregulated skeletal muscle (SkM) functional networks. Determination of genome-wide chromatin occupancy in primary myoblast revealed direct Spin1 target genes and suggested that deregulated basic helix-loop-helix transcription factor networks account for developmental defects in Spin1M5 fetuses. Furthermore, correlating histological and transcriptome analyses, we show that aberrant expression of titin-associated proteins, abnormal glycogen metabolism, and neuromuscular junction defects contribute to SkM pathology in Spin1M5 mice. Together, we describe the first example of a histone code reader controlling SkM development in mice, which hints at Spin1 as a potential player in human SkM disease.
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