新的误解变异导致SLC5A6相关疾病的表型谱中的中间表型
Yasuhiro Utsuno1,2, Keisuke Hamada3, Kohei Hamanaka1
1Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
Journal of human genetics
|November 27, 2023
概括
一个日本家庭的新型SLC5A6基因变异导致了新的疾病,自发地缓解了脑囊 (SRDDBC) 的发育延迟. 这种情况呈现出SMVTD和COMNB之间的现型严重程度中间,对营养疗法有反应.
科学领域:
- 遗传学 是一个遗传学.
- 生物化学 生物化学
- 神经学 神经学
背景情况:
- SLC5A6编码了一个生物素,泛多酸和脂酸的载体.
- 在SLC5A6的变体导致依赖的多维生素载体缺乏症 (SMVTD) 和童年开始的生物素反应性外围运动神经病变 (COMNB).
- 现有的SMVTD和COMNB具有不同的神经和全身症状,对营养替代疗法有反应.
研究的目的:
- 报告一家日本家庭的三名患者患有SLC5A6.6中的新型化合物异合误解变体.
- 描述这些患者的临床表型和遗传发现.
- 根据观察到的中间表型,提出一种新的SLC5A6相关疾病.
主要方法:
- 基因测序以识别SLC5A6变体 (NM_021095.4:c.[221C>T];[642G>C] p.[(Ser74Phe)];[(Gln214His) ]). 基因测序可以用于识别SLC5A6变体.
- 在 silico 预测和 Drosophila 分析以评估变体的致病性.
- 临床评估包括新生儿头骨成像和发育评估.
主要成果:
- 三名患者出现了先天性脑囊和轻微的运动发育迟缓.
- 发育延迟在没有治疗的情况下显著自发消失.
- 患者的表型在严重程度上介于SMVTD和COMNB之间.
结论:
- 这些发现表明一种新的与SLC5A6相关的疾病:与脑囊 (SRDDBC) 自发缓解的发育迟缓.
- SRDDBC表现出SMVTD和COMNB之间的表型严重程度.
- 需要进一步的研究来确认SRDDBC作为一个独立的临床实体.
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