一个迟发性非综合征型常染色体显性遗传性聋家系表型特征及致病基因初步探讨

A Preliminary Study of Phenotypic Characteristics and Causative Genes in a Family with Late-onset Nonsyndromic Autosomal Dominant Hereditary Hearing Loss

王鸿涵;冯永;王行炜;梅凌云;陈红胜;蒋璐;门美超;张华;李海波;刘亚兰;卢焰梅;贺楚峰;

1:中南大学湘雅医院耳鼻咽喉头颈外科

2:耳鼻咽喉重大疾病研究湖南省重点实验室

3:中南大学医学遗传学国家重点实验室

摘要
目的分析一个迟发性遗传性聋大家系的临床表型,探讨该家系耳聋患者的致病基因。方法对一个湖南籍耳聋大家系成员进行详细的病史资料采集、体格检查、听力学检查,其中两名患者做了颞骨CT检查。绘制家系图。以先证者外周血基因组DNA为模板对候选致病基因进行涵盖全部编码序列聚合酶链反应(polymer-ase chain reaction,PCR)扩增,对扩增产物进行酶切纯化后用ABI 3730测序仪直接测序,用DNASTAR-Laser-gene SeqMan Pro软件对测序结果进行分析。结果系谱分析得知该家系是一个常染色体显性遗传性非综合征型聋家系。患者临床表现高度一致,均表现为在9~25岁时首先出现"嗡嗡样"耳鸣,然后自觉双耳听力下降,纯音测听显示早期为以高频听力下降为主的神经性聋,之后听力下降程度逐步加重并波及低频。对候选致病基因进行突变检测,未发现致病突变。结论该家系符合常染色体显性遗传的特征,其致病基因还有待于进一步探索。
关键词
遗传性聋;常染色体显性遗传;非综合征型;基因;家系
基金项目(Foundation):
“卫生部部属(管)医院临床学科重点项目”;; “国家自然科学基金面上项目”(30971589,81170923,30970958,81070481);; “中央高校基本科研业务费专项资金”;; “湖南省研究生科研创新项目”(CX2011B057)共同资助
作者
王鸿涵;冯永;王行炜;梅凌云;陈红胜;蒋璐;门美超;张华;李海波;刘亚兰;卢焰梅;贺楚峰;
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