对CALM1/2相关疾病的表型扩展,包括没有心律失常的神经学表型
Hieu D Hoang1, Rebecca C Spillmann2, Daniel J Wegner1
1Edward Mallinckrodt Department of Pediatrics, Washington University in St. Louis School of Medicine, 660 South Euclid Avenue, St. Louis, MO 63110, United States.
新的calmodulin (CALM1/2) 变种引起神经症状,扩大已知的疾病表型超出心律失常. 这项研究确定了一种特定的CALM1/2变异,与发育迟缓和智力障碍有关,而不是心脏病.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 神经科学是一个神经科学.
背景情况:
- 卡尔莫杜林 (CALM) 是一个关键的细胞内传感器,调节细胞功能.
- CALM变异与长QT综合征,CPVT和最近的神经疾病有关.
- 三个人类的CALM类型 (CALM1,CALM2,CALM3) 编码相同的蛋白质.
研究的目的:
- 研究一种与神经现象型相关的新型CALM1/2 de novo变体 (c.419A>T).
- 确定CALM1/2 c.419A>T变体的功能后果.
- 探索CALM相关疾病的表型扩展.
主要方法:
- 报告了两名携带CALM1/2 c.419A>T变异的个人.
- 在CALM1探针的血液样本上进行RNA测序.
- 使用了C. elegans ortholog cmd-1来建模CALM1/2变种 (p.E140V和p.E141G).
主要成果:
- 这种CALM1/2 c.419A>T变异导致低血压,运动延迟,智力障碍和异常EEG.
- RNA-seq揭示了异常的拼接和框架移动的C端切断,有一些p.E140V错误的蛋白质生产.
- 在C. elegans的建模中,cmd-1 E140V和E141G之间有明显的表型差异.
结论:
- 这种CALM1/2 c.419A>T变异扩大了已知的CALM相关疾病表型,包括神经疾病.
- 这种变体主要导致神经症状,缺乏心律失常现象型.
- 不同的基因机制是不同CALM变异的基础,影响它们的相关表型.
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