线粒体DNA 12SrRNA A1555G突变在中国西北地区的流行病学研究  

Molecular epidemiology of mitochondrial DNA A1555G mutation in Northwest China

作　　者：徐百成[1] 郭玉芬[1] 关静[1] 翟喜平[1] 兰兰[2] 程世红[1] 陈之慧[2] 王秋菊[2] 

机构地区：[1]兰州大学第二医院耳鼻咽喉-头颈外科,兰州730030 [2]解放军总医院耳鼻咽喉-头颈外科,解放军耳鼻咽喉科研究所,北京100853

出　　处：《中华耳科学杂志》2007年第1期56-59,共4页Chinese Journal of Otology

基　　金：国家自然基金面上项目(编号:30370782;30470956;30572016);北京市重大科技项目课题(编号H020220020610);高等学校全国优秀博士学位论文作者专项资金资助项目(编号200463);军队"十一五"杰出人才项目(06J018)联合资助。

摘　　要：目的调查中国西北地区非综合征感音神经性耳聋患者群体中线粒体DNA 12SrRNA A1555G突变的流行情况,评估开展这一突变检测的临床价值。方法收集中国西北地区共612例感音神经性聋患者外周静脉血,从白细胞中提取DNA,多聚酶链反应(PCR)扩增线粒体DNA目的片断,Alw26I限制性内切酶检测A1555G点突变,而后对阳性病例的PCR产物进行DNA测序验证。结果在612例感音神经性聋患者中,共发现56例A1555G突变患者:其中217例为药物性耳聋患者,有47例为A1555G点突变阳性;在其余395例非药物性耳聋患者中,检出9例A1555G突变。结论中国西北地区的药物性耳聋较为常见,A1555G突变在本地区感音神经性耳聋人群中有较高的检出率(9.15%),在该地区开展线粒体DNA 12SrRNA A1555G突变检测有重要意义。Objective To explore the incidence of the mitochondrial 12S ribosomal RNA A1555G mutation in Northwest Chinese populations with nonsyndromic sensorineural hearing loss, and to estimate the clinical value of this molecular diagnosis. Methods Blood samples were obtained from 612 patients with nonsyndromoc sensorineural hearing loss in Northwest China. Genomic DNA was extracted from isolated leukocytes. The mitochondrial DNA fragments were amplified by polymerase chain reaction. MtDNA 12SrRNA A1555G mutation was detected using Alw26I restriction endonuclease digestion, followed by direct sequencing to identify the A1555G mutation. Results Forty-seven individuals from 217 patients with aminoglycoside antibiotic-induced deafness （AAID） had homoplasmic mtDNA 12SrRNA A1555G mutation, furthermore, this mutation was found in 9 individuals from other 395 patients without a history of aminoglycoside antibiotic use. Conclusion The aminoglycoside antibiotic-induced deafness is one of the main types of deafness in this region; also, there is a high prevalence of the mtDNA A1555G mutation in this region. Thus screening for mtDNA 12SrRNA A1555G mutation is useful to molecular diagnosis for AAID.

关 键 词：分子流行病学 聋 线粒体DNA 突变 氨基糖甙类抗生素 

分 类 号：R764.43[医药卫生—耳鼻咽喉科] R181.26[医药卫生—临床医学]