在皮层发育的焦点形中,mTOR路径体性致病变体:新型变体,地形绘图和临床结果
Eric Krochmalnek1, Andrea Accogli1, Judith St-Onge1
1From the Research Institute of the McGill University Health Centre (E.K., J.S.-O., N.A.-B., L.M., E.B., K.A.M., J.L.-L., J.-B.R., R.W.D., M.S.); Integrated Program in Neuroscience (E.K.), McGill University; Department of Specialized Medicine (A.A.), McGill University Health Centre; Department of Human Genetics (A.A., J.-B.R.), Faculty of Medicine; Goodman Cancer Centre (G.P., S.-H.K., N.S.), Department of Biochemistry, McGill University; Department of Pediatric Neurosurgery (T.B.-C., A.W.), Centre Hospitalier Universitaire Sainte-Justine, University of Montreal; Division of Pediatric Neurology (G.A., K.A.M., C.C.P., M.S.), Department of Pediatrics, McGill University, Montreal, Quebec, Canada; Department of Pediatrics (G.A.), Unaizah College of Medicine and Medical Sciences, Qassim University, Saudi Arabia; Department of Neurology and Neurosurgery (K.A.M., F.D., J.H., C.C.P., M.S.), McGill University Health Centre; Department of Pathology (J.K., S.A.), McGill University; Division of Neurosurgery (J.-P.F., J.A., R.W.D.), Department of Pediatric Surgery, McGill University Health Center; McGill University (B.R.); Department of Pathology (C.F.-B.), Centre Hospitalier Universitaire Sainte-Justine, University of Montreal, Quebec, Canada.
哺乳动物目标拉巴胺素 (mTOR) 途径的体质变异驱动皮层发育的焦点形 (FMCDs). 变异性等位基因的频率与mTORpathie的疾病严重程度和外科手术结果相关.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 病理学 病理学 病理学
背景情况:
- 哺乳动物目标拉巴胺素 (mTOR) 信号通路中的体和生殖系变异是皮层发育焦点形 (FMCDs) 的关键驱动因素,称为mTORpathie.
- 这些包括焦点皮质发育不良 (FCD) 类型II,多微症和半巨脑症.
研究的目的:
- 在mTOR通路基因中选体变异的mTORpathic特征的切除的FMCD标本.
- 描述新的致病变体,并分析它们与神经成像,组织病理学和临床结果相关的分布.
主要方法:
- 21个切除的FMCD标本的超深测序 (FCD类型II,结核性硬化综合体,半大脑).
- 使用针对性的超深度测序,在脑组织中绘制变异性等位基因频率 (AAF) 的映射.
- 候选体质MTOR变异的功能验证和用于DEPDC5变异分析的RNA测序.
主要成果:
- 在66.7% (14/21) 的患者中发现了因果 mTOR 途径基因变异,其中有13种体质变异 (AAF 0.6%-12.0%).
- 身体变异AAF与地形分布,组织病理学和术后结果相关.
- 在MTOR和DEPDC5中发现了新的致病变体,扩大了mTOR病变的遗传谱.
结论:
- 在特定的FMCD中,mTOR通路基因的体性致病变体普遍存在,并且与疾病特征相关.
- 变异基频率是疾病严重程度的潜在生物标志物,可以为外科手术策略提供信息.
- 鉴定新型变异扩大了对mTORpathie的遗传理解,并强调需要进行全面的遗传查.
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