小说AIFM1在2个兄弟姐妹的变体中出现了感觉神经听力损失和大脑小叶缩症
Alejandra Vasquez1, Lisa A Schimmenti1, Nadir Demirel1
1From the Department of Neurology (A.V., M.V.P., D.S.); Department of Clinical Genomics (L.A.S.); Division of Pediatric Pulmonology (N.D., R.P.B.), Department of Pediatrics and Adolescent Medicine; Division of Pediatric Rehabilitation Medicine, Department of Physical Medicine and Rehabilitation (A.E.R.); and Department of Pediatrics and Adolescent Medicine (C.R.F.), Mayo Clinic.
Neurology. Genetics
|November 27, 2024
概括
我们发现了一种新的AIFM1基因变异,导致兄弟姐妹的早期听力损失和渐进式小脑动症. 这一发现扩大了对AIFM1相关疾病及其各种症状的理解.
科学领域:
- 遗传学 是一个遗传学.
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
背景情况:
- 诱导亡因子线粒体相关的1 (AIFM1) 基因编码了一种对编程细胞死亡至关重要的蛋白质.
- 虽然AIFM1变种参与了各种细胞过程,但它们在神经系统疾病中的作用仍在被阐明.
研究的目的:
- 调查在两个兄弟姐妹中发现的一种新型AIFM1变异,该变异呈现出早期发病的听力损失和渐进的小脑动症.
- 描述与这种新型AIFM1变异相关的临床,成像和遗传特征.
主要方法:
- 临床评估受影响的兄弟姐妹,包括神经学检查和听力损失的评估.
- 大脑磁共振成像 (MRI) 和肌电图 (EMG) 研究,以评估神经系统的参与.
- 全基因组测序 (WGS) 用于确定观察到的表型的遗传原因.
主要成果:
- 两名兄弟姐妹出现了听觉神经病变,渐进的小脑动力衰竭和外围神经病变,具有家族内表型变异性.
- 电生理学研究表明轴突神经病变,在一个兄弟姐妹中,前角细胞障碍.
- 全基因组测序发现了一种新型的,X链接的,母系遗传的AIFM1变体 (c.1299C>G p. Ile433Met).
结论:
- 在遗传性小脑动症和听力神经病变的差异诊断中,应考虑AIFM1变异.
- 这项研究扩大了AIFM1相关疾病的已知遗传谱,并突出了表型的家族内变异性.
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