新型双丁基因变异中的表型变异与皮下带异质相关的新型双丁基因变异
Radha Procopio1, Francesco Fortunato2, Monica Gagliardi1
1Department of Medical and Surgical Sciences, Neuroscience Research Center, Magna Graecia University, 88100 Catanzaro, Italy.
International journal of molecular sciences
|May 25, 2024
概括
双丁 (DCX) 基因中的遗传变异会导致皮下带异位 (SBH),这是一个lissencephaly谱系障碍. 这项研究确定了新的DCX变体,并扩大了对SBH基因型-表型相关性的理解.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
背景情况:
- 双皮质素 (DCX) 在大脑发育过程中对神经元迁移至关重要.
- 在DCX基因的致病变体是lissencephaly (LIS) 谱系障碍的主要原因.
- 皮下带异位 (Subcortical Band Heterotopia,SBH) 代表了LIS谱内的较温和的表型,特别是在异质合体雌性中.
研究的目的:
- 在三个无关的女性病例中调查皮下带异质 (SBH) 的遗传基础.
- 识别和描述与SBH相关的DCX基因中的新型和已知的致病变体.
- 扩大对在lissencephaly频谱内的基因型-表型相关性的理解.
主要方法:
- 针对性测序在三个被诊断患有SBH的无关女性患者身上进行.
- 已识别的变异被分析到它们对双丁 (DCX) 蛋白的影响.
- 包括临床表现和神经成像在内的表型数据与已识别的遗传变异相关.
主要成果:
- 确定了三种DCX变体:一种新型错误变体 (c.601A>G:p.Lys201Glu) 和两个无意义变体 (c.210C>G:p.Tyr70*和c.907C>T:p.Arg303*).
- 这种新型的误解变异证明了四代人间的母女传播,并具有不同的发作表型.
- 鉴定到的变种与前端中心的SBH,混合性发,在某些情况下,严重的耐药性和智力障碍有关.
结论:
- 已发现的新型DCX变体有助于基因型谱的lissencephaly疾病.
- 受影响家族的详细表型描述为DCX相关的SBH提供了宝贵的见解.
- 对DCX-SBH病例进行进一步的研究和讨论是有必要的,以改善诊断和管理.
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