相关实验视频
Updated: Sep 16, 2025

06:37
Immunolabelling Myofiber Degeneration in Muscle Biopsies
Published on: December 5, 2019
9.0K
杜琴肌力发育不良的晚期骨肌肉转录组显示了BMP4诱导的分子签名
Hanna Sothers1,2, Xianzhen Hu3,4, David K Crossman5
1Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham (UAB), Birmingham, Alabama, USA.
Journal of cachexia, sarcopenia and muscle
|July 11, 2025
概括
杜氏肌肉发育不良 (DMD) 肌肉显示与骨形态基因蛋白4 (BMP4) 信号传递相关的基因表达变化. 这种BMP4/Smad8通路可能会驱动晚期DMD的转录组变化,提供治疗点.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- 杜申肌肉发育不良 (DMD) 涉及DYSTROPHIN基因的功能丧失变异,导致骨肌肉衰竭.
- 异常免疫反应,包括TGFβ细胞因子上调 (例如,TGFβ1,BMP4),是DMD肌肉病理的特征.
- 之前的研究表明,BMP4刺激会增加肌肉细胞中的Smad8转录.
研究的目的:
- 调查BMP4信号在晚期DMD骨肌中的作用.
- 在DMD中识别与BMP4信号相关的转录组签名.
- 测试BMP4信号驱动晚期DMD异常基因表达的假设.
主要方法:
- 用RNA-Seq从晚期DMD患者和非DMD对照的骨肌肉活检中生成转录组.
- 用BMP4刺激C2C12肌肉细胞,以比较转录组形状.
- 使用Ingenuity路径分析,WGCNA和GSEA来分析转录差异.
主要成果:
- 在DMD肌肉和BMP4刺激的C2C12细胞之间发现了1027个失调基因的显著重叠.
- 确定了SERPING1和Aff3作为关键的枢纽基因.
- 肌肉DMD表现出高调节的TGFβ信号传递,ECM重塑和原生物合成,并抑制了线粒体通路.
结论:
- DMD转录组的特征是免疫功能失调,ECM重塑和肌肉生物能代谢.
- 一个晚期的DMD骨肌肉转录组特征与BMP4诱导的C2C12细胞变化重叠.
- BMP4/Smad8通路被认为是晚期DMD的疾病驱动调节器,表明潜在的治疗点.
相关概念视频
Satellite Stem Cells and Muscular Dystrophy
2.0K
Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...
2.0K
Formation of Muscle Fibers from Myoblasts
5.2K
De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
5.2K

