Utility of droplet digital PCR and NGS-based CNV clinical assays in hearing loss diagnostics: current status and future prospects

被引:11
作者
Rentas, Stefan [1 ]
Abou Tayoun, Ahmad [2 ,3 ]
机构
[1] Univ N Carolina, Dept Pathol & Lab Med, Chapel Hill, NC 27515 USA
[2] Al Jalila Childrens Specialty Hosp, Al Jalila Genom Ctr, Dubai, U Arab Emirates
[3] Mohammed Bin Rashid Univ Med & Hlth Sci, Dept Genet, Dubai, U Arab Emirates
关键词
GJB2; STRC; hearing loss; diagnostic testing; copy number variant; droplet digital PCR; genome sequencing; NGS; COPY-NUMBER VARIANTS; GENE; MUTATIONS;
D O I
10.1080/14737159.2021.1887731
中图分类号
R36 [病理学];
学科分类号
100104 ;
摘要
Introduction: Genetic variants in over 100 genes can cause non-syndromic hearing loss (NSHL). Comprehensive diagnostic testing of these genes requires detecting pathogenic sequence and copy number alterations with economical, scalable and sensitive assays. Here we discuss best practices and effective testing algorithms for hearing-loss-related genes with special emphasis on detection of copy number variants. Areas covered: We review studies that used next-generation sequencing (NGS), chromosomal microarrays, droplet digital PCR (ddPCR), and multiplex ligation-dependent probe amplification (MLPA) for the diagnosis of NSHL. We specifically focus on unique and recurrent copy number changes that affect the GJB2 and STRC genes, two of the most common causes of NSHL. Expert opinion: NGS panels and exome sequencing can detect most pathogenic sequence and copy number variants that cause NSHL; however, GJB2 and STRC currently require additional assays to capture all pathogenic copy number variants. Adoption of genome sequencing may simplify diagnostic workflows, but further investigational studies will be required to evaluate its clinical efficacy.
引用
收藏
页码:213 / 221
页数:9
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