在表达扩展CUG重复的转基因小鼠中的肌性缩症
A Mankodi1, E Logigian, L Callahan
1Department of Neurology, School of Medicine and Dentistry, University of Rochester, Box 673, 601 Elmwood Avenue, Rochester, NY 14642, USA.
Science (New York, N.Y.)
|September 8, 2000
概括
肌性缩症 (DM) 是由于DMPK基因mRNA中扩大CTG重复引起的. 表达这些扩展重复的转基因小鼠发展了DM症状,证实了RNA在疾病中的功能获取.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 神经学 神经学
背景情况:
- 肌性缩症 (DM) 是一种常见的成年肌肉缩症.
- 它源于CTG在DMPK基因的3'未翻译区域的重复扩张.
- 突变的mRNA在细胞核中积累起来.
研究的目的:
- 调查mRNA中扩展的CUG重复是否足以引起DM.
- 探索RNA功能增长在DM病变发生过程中的作用.
主要方法:
- 在转基因小鼠中表达的未翻译的CUG重复在无关的mRNA中.
- 扩展重复和非扩展重复的小鼠之间的表型比较.
主要成果:
- 表达扩展CUG重复的小鼠表现出肌和肌病.
- 没有扩展重复的小鼠没有出现这些症状.
结论:
- 扩展的CUG重复转录足以诱导一个DM表型.
- 这支持一种涉及RNA在DM病原发生过程中的功能增益机制.
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