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Feng ML, Huang SS, Tang FZ, Zhang X, Li XH, Qiu SW, Yuan YY. [Phenotype and genotype analysis of recessive hereditary moderate sensorineural hearing loss caused by new mutations in OTOGL gene]. Zhonghua Yi Xue Za Zhi 2021; 101:115-121. [PMID: 33455126 DOI: 10.3760/cma.j.cn112137-20200912-02628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To perform the phenotype and genetic analysis on two families with moderate sensorineural hearing impairment and determine the cause of deafness. Methods: The phenotype and genetic analysis was performed on the two hearing impairment pedigrees coming to Chinese PLA General Hospital from January 2014 to August 2020. DNA samples of the proband from family 1 and the parents from family 2 were collected and tested through next generation sequencing on all deafness genes, and Sanger sequencing was performed to verify the mutation sites. The reported pathogenic variants of the otogelin-like (OTOGL) gene, the autosomal recessive inherited deafness genes that cause moderate sensorineural hearing loss and the clinical manifestations of the deafness genes that have the similar expression location as the OTOGL gene were summarized and analyzed. Results: The pathogenic variants in the families were compound heterozygous variants in the OTOGL gene c.2773C>T/c.2826C>G (p.Arg925*/p.Tyr942*) and c.4455G>A/c.875C>G (Trp1485*/p.Ser292*), respectively. c.2773C>T was an already reported pathogenic variant causing hearing impairment in the literature, while c.2826C>G, c.4455G>A and c.875C>G were novel reported variant sites. The above four variants were classified as pathogenic variants according to the variant interpretation standards and guideline of the Amercian College of Medical Genetics and Genomics. Conclusions: Pathogenic variants in OTOGL gene is an important genetic factor leading to moderate sensorineural hearing loss. The newly discovered variant sites c.2826C>G, c.4455G>A and c.875C>G enrich the variant spectrum of OTOGL gene. The results of the current study provide a basis for genetic counseling of the related families and a new target for the treatment of hereditary hearing loss in the future.
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Affiliation(s)
- M L Feng
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital, Chinese PLA Medical School / National Clinical Research Center for Otolaryngologic Diseases / State Key Lab of Hearing Science, Ministry of Education / Beijing Key Lab of Hearing Impairment Prevention and Treatment, Beijing 100853, China
| | - S S Huang
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital, Chinese PLA Medical School / National Clinical Research Center for Otolaryngologic Diseases / State Key Lab of Hearing Science, Ministry of Education / Beijing Key Lab of Hearing Impairment Prevention and Treatment, Beijing 100853, China
| | - F Z Tang
- Department of Otolaryngology-Head and Neck Surgery, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - X Zhang
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital, Chinese PLA Medical School / National Clinical Research Center for Otolaryngologic Diseases / State Key Lab of Hearing Science, Ministry of Education / Beijing Key Lab of Hearing Impairment Prevention and Treatment, Beijing 100853, China
| | - X H Li
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital, Chinese PLA Medical School / National Clinical Research Center for Otolaryngologic Diseases / State Key Lab of Hearing Science, Ministry of Education / Beijing Key Lab of Hearing Impairment Prevention and Treatment, Beijing 100853, China
| | - S W Qiu
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital, Chinese PLA Medical School / National Clinical Research Center for Otolaryngologic Diseases / State Key Lab of Hearing Science, Ministry of Education / Beijing Key Lab of Hearing Impairment Prevention and Treatment, Beijing 100853, China
| | - Y Y Yuan
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital, Chinese PLA Medical School / National Clinical Research Center for Otolaryngologic Diseases / State Key Lab of Hearing Science, Ministry of Education / Beijing Key Lab of Hearing Impairment Prevention and Treatment, Beijing 100853, China
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