在MARVELD2中出现的新型组合异合体变体,导致两个中国家庭的自体逆行性听力损失
Xinyu Shi1, Xiaozhou Liu1, Yanjun Zong1
1Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China.
Molecular genetics & genomic medicine
|July 30, 2024
概括
MARVELD2基因的突变与遗传性听力损失有关. 这项研究确定了三种变异,包括一种致病突变,扩大了对非综合征性听力损失的理解.
科学领域:
- 遗传学 是一个遗传学.
- 耳鼻喉科 耳鼻喉科 耳鼻喉科
- 分子生物学分子生物学
背景情况:
- 遗传性听力损失是先天性听力损失的一个重要原因.
- 编码三细胞蛋白的MARVELD2基因对内耳屏障功能至关重要,并与听力损失有关.
- MARVELD2位于DFNB49位点,可能会导致非综合征性自体逆性遗传性听力损失.
研究的目的:
- 调查MARVELD2变种在汉族中国血统中遗传性听力损失中的作用.
- 识别和描述与非综合征性听力损失相关的MARVELD2基因突变.
主要方法:
- 对两个听力损失的汉族家庭进行了临床和遗传分析.
- 针对性下一代测序用于检测MARVELD2基因中的变异.
- 使用生物信息工具 (RDDC,SpliceAI,REVEL) 来预测已识别的变种的病原性.
主要成果:
- 两个探头都呈现了感官神经听力损失,未能接受新生儿查.
- 确定了三种MARVELD2突变:c.1331+1G>A (致病性),c.1325A>G (不确定的意义),和c.782G>A (不确定的意义).
- 变种分类遵循ACMG/AMP指南.
结论:
- 鉴定到的MARVELD2变种有助于了解它们与遗传性听力损失的关联.
- 这项研究扩大了已知的聋症基因突变谱.
- 这些发现有助于遗传性听力损失患者的管理和遗传咨询.
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