想法:副本数变异在2个C57BL/6J小鼠模型和人类中没有影响中风的严重性:一项探索性研究
Marco Foddis1, Sonja Blumenau1, Susanne Mueller1,2
1Department of Experimental Neurology, Center for Stroke Research Berlin (CSB), Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (M.F., S.B., S.M., K.W., M.E., A.M., U.D., C.S.).
Stroke
|January 27, 2025
概括
在C57BL/6J小鼠中,Ide基因的遗传变异,包括副本数变异,是罕见的,并且不会显著影响后部沟通动脉通透性. 这些Ide变种似乎也不会在人类中引起血管表型.
科学领域:
- 遗传学和基因组学 遗传学和基因组学
- 心血管生物学 心血管生物学
- 神经科学是一个神经科学.
背景情况:
- 在研究中广泛使用的C57BL/6J小鼠菌株表现出显著的遗传和表型变异性,其基因型-表型联系往往不清楚.
- 大脑附带可塑性对中风生存至关重要,其遗传模式,特别是后部通讯动脉 (PcomA) 穿透性,被观察到在小鼠模型中遵循孟德尔式遗传.
- 据报道,胰岛素降解酶 (Ide) 位点的拷贝数变异 (CNV) 在C57BL/6J小鼠群体中同样分离,这促使人们对其在PcomA变异性中的作用进行了调查.
研究的目的:
- 调查Ide CNV是否解释了在C57BL/6J杂交小鼠中观察到的PcomA通透率的变异性.
- 确定IDE结构变异 (CNV,功能增益/损失突变) 对小鼠模型和人类群体中大脑血管表型的影响.
主要方法:
- 在C57BL/6J小鼠中使用先进的成像 (MRI,血管造影,脑血流) 和不同实验组 (缩小,闭塞,天真,假) 的组织学来表征附带体.
- 基因型 (Taqman),外基因组测序和RNA测序在小鼠样本上进行.
- 在一个大型人类队列 (英国生物银行,英格兰基因组学) 中研究IDE变异,包括454,040例病例和对照.
主要成果:
- 在具有专利PcomA的小鼠模型中检测到一个Ide CNV,但它没有与PcomA专利表型分离.
- 在人类个体中发现了两种具有功能丧失效应的异合体IDE CNV,包括遗传性动力不良和先天性心脏病患者,以及健康个体.
- 在对照群和患者群中发现了四种IDE功能丧失点突变,其中一些是从健康的父母遗传的.
结论:
- 在被研究的人群中,CNV和功能丧失变异很少见.
- 这些Ide变异似乎不是C57BL/6J小鼠PcomA变异的主要驱动因素.
- 已识别的IDE变体在人类血管表型中没有显著的因果作用.
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