遗传 ›› 2012, Vol. 34 ›› Issue (6): 695-704.doi: 10.3724/SP.J.1005.2012.00695

• 研究报告 • 上一篇    下一篇

浙江省非综合征型耳聋患者12S rRNA突变频谱分析

郑斌娇1, 彭光华2, 陈波蓓3, 方芳1, 郑静1, 伍越1, 梁玲芝1, 南奔宇3, 唐霄雯1, 朱翌4, 吕建新1, 管敏鑫1, 5   

  1. 1. 温州医学院, Attardi线粒体生物医学研究院和浙江省医学遗传学重点实验室, 温州 325035 2. 余姚市人民医院耳鼻咽喉科, 宁波 315400 3. 温州医学院附属第二医院附属育英儿童医院耳鼻喉科, 温州 325027 4. 温州医学院附属第一医院耳鼻喉科, 温州 325027 5. 浙江大学生命科学学院, 杭州 310058
  • 收稿日期:2011-10-19 修回日期:2011-11-28 出版日期:2012-06-20 发布日期:2012-06-25
  • 通讯作者: 管敏鑫 E-mail:gminxin88@gmail.com
  • 基金资助:

    国家重点基础研究发展规划(973计划)项目(编号:2004CCA02200), 国家自然科学基金项目(编号:81070794), 浙江省重大科技专项社会发展项目(编号:2007C13021), 浙江省卫生厅项目(编号:2009A135), 浙江省研究生创新科研项目(编号:YK2010084)和温州市科技局项目(编号:Y20080122)资助

Spectrum and frequency of mitochondrial 12S rRNA variants in the Chinese subjects with nonsynrdomic hearing loss in Zhejiang Province

ZHENG Bin-Jiao1, PENG Guang-Hua2, CHEN Bo-Bei3, FANG Fang1, ZHENG Jing1, WU Yue1, LIANG Ling-Zhi1, NAN Ben-Yu3, TANG Xiao-Wen1, ZHU Yi4, LU Jian-Xin1, GUAN Min-Xin1,5   

  1. 1. Attardi Institute of Mitochondrial Biomedicine and Zhejiang Provincial Key Laboratory of Medical Genetics, School of Life Sciences, Wenzhou Medical College, Wenzhou 325035, China 2. Department of Otolaryngology, Yuyao People’s Hospital, Ningbo 315400, China 3. Department of Otolaryngology, the Second Affiliated Hospital & Yuying Children’s Hospital of Wenzhou Medical College, Wenzhou 325027, China 4. Department of Otolaryngology, the First Affiliated Hospital of Wenzhou Medical College, Wenzhou 325027, China 5. College of Life Sciences, Zhejiang University, Hangzhou 310058, China
  • Received:2011-10-19 Revised:2011-11-28 Online:2012-06-20 Published:2012-06-25

摘要: 线粒体DNA (Mitochondrial DNA , mtDNA)突变是引起耳聋的重要原因之一。尤其是12S rRNA基因是药物性耳聋与非综合征型耳聋相关的突变热点区域。文章收集了浙江省各地区非综合征型及药物性耳聋患者标本318例, 对其进行临床和分子遗传学评估。12S rRNA基因突变分析发现34个变异位点, 已知的1555A>G、1494C>T和1095T>C突变分别占9.1%、0.6%和1.25%。结构和种系发生分析显示, 839A>G和1452T>C突变位于12S rRNA基因的高度保守区域且未在449例正常对照组中发现, 可能增加了耳毒性药物的敏感性。其他变异位点为多态性位点。文章数据支持了12S rRNA基因是耳毒性药物的作用靶点之一这一理论, 为预测个体耳毒性的发生风险, 提高氨基糖甙类药物治疗安全性提供了有价值的信息, 以期降低耳聋的发生。

关键词: 线粒体12S rRNA基因, 非综合征型耳聋, 氨基糖甙类药物, 突变频谱听力损失

Abstract: Mitochondrial DNA (mtDNA) mutations are one of the important causes of deafness. In particular, the 12S rRNA gene is the hot spots for mutations associated with both aminoglycoside ototoxicity and nonsyndromic deafness. In this report, a total of 318 Chinese pediatric hearing-impaired subjects were recruited from otology clinics in the Zhejiang Province, China. These subjects underwent clinical, genetic evaluation and molecular analysis of 12S rRNA gene. Mutational analysis identified 34 variants in the 12S rRNA gene in this cohort. The incidences of the known deafness-associated 1555A>G, 1494C>T and 1095T>C mutations were 9.1%, 0.6% and 1.25% in this cohort, respectively. Other mtDNA variants were evaluated by structural and phylogenetic analysis. Of these, the 839A>G and 1452T>C variants could confer increased sensitivity to aminoglycosides or nonsyndromic deafness as they were not present in 449 Chinese controls and localized at highly conserved nucleotides of the 12S rRNA. However, other variants appeared to be polymorphisms. These data further support the idea that mitochondrial 12S rRNA is one of major targets for aminoglycoside ototoxicity. These data have been providing valuable information to predict which individuals are at risk for ototoxicity, to improve the safety of aminoglycoside antibiotic therapy, and eventually to decrease the incidence of deafness.

Key words: hearing loss, mitochondrial 12S rRNA gene, non-syndromic deafness, aminoglycoside antibiotics, mutation spectrum