Targeted massive parallel sequencing: the effective detection of novel causative mutations associated with hearing loss in small families

Orphanet Journal of Rare Diseases

Sang-Heun Lee¹  Kyu-Yup Lee¹  Un-Kyung Kim²  Soo-Young Choi²  Dong-Bin Kim²  Se-Kyung Oh²  Jeong-In Baek² 

[1]Department of Otolaryngology, College of Medicine, Kyungpook National University, Daegu, 700-721, South Korea

[2]Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, 702-701, South Korea

关键词: Gene;    Mutation;    Next-generation sequencing;    Heterogeneous;    Hearing loss;   

Others  :  864241
DOI  :  10.1186/1750-1172-7-60

 received in 2012-03-30, accepted in 2012-08-21,  发布年份 2012

【 摘 要 】

Background

Hereditary hearing loss is one of the most common heterogeneous disorders, and genetic variants that can cause hearing loss have been identified in over sixty genes. Most of these hearing loss genes have been detected using classical genetic methods, typically starting with linkage analysis in large families with hereditary hearing loss. However, these classical strategies are not well suited for mutation analysis in smaller families who have insufficient genetic information.

Methods

Eighty known hearing loss genes were selected and simultaneously sequenced by targeted next-generation sequencing (NGS) in 8 Korean families with autosomal dominant non-syndromic sensorineural hearing loss.

Results

Five mutations in known hearing loss genes, including 1 nonsense and 4 missense mutations, were identified in 5 different genes (ACTG1, MYO1F, DIAPH1, POU4F3 and EYA4), and the genotypes for these mutations were consistent with the autosomal dominant inheritance pattern of hearing loss in each family. No mutational hot-spots were revealed in these Korean families.

Conclusion

Targeted NGS allowed for the detection of pathogenic mutations in affected individuals who were not candidates for classical genetic studies. This report is the first documenting the effective use of an NGS technique to detect pathogenic mutations that underlie hearing loss in an East Asian population. Using this NGS technique to establish a database of common mutations in Korean patients with hearing loss and further data accumulation will contribute to the early diagnosis and fundamental therapies for hereditary hearing loss.

【 授权许可】

   
2012 Baek et al.; licensee BioMed Central Ltd.

【 图 表 】

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