TY - JOUR JF - KAUMS JO - Feyz VL - 26 IS - 6 PY - 2022 Y1 - 2022/12/01 TI - Study of genes and mutations spectrum causing non-syndromic hearing loss in Iran: A review study TT - بررسی طیف ژن‌ها و جهش‌های عامل ناشنوایی غیرسندرومی در ایران: یک مطالعه مروری N2 - Background: Hearing loss (HL) is known as the most common sensorineural disorder. The frequency of hearing impairment is one in every 500 infants born, worldwide. In Iran, due to the high prevalence of consanguineous marriages, this amount is estimated to be two to three times higher. The high locus and allelic heterogeneity of hereditary hearing loss in different populations of Iran and distribution of studies are the main reasons for conducting this review. Materials and Methods: Published articles were collected and reviewed in Google scholar, Scopus, Web of Science and PubMed databases from 1989 to 2022 based on the keywords of Iran, non-syndromic, hearing loss, gene, mutation and pathogenic variants. Results: So far, more than 130 genes causing non-syndromic hearing loss (NSHL) have been known in the world, of which 57 genes including 430 pathogenic and likely pathogenic mutations have been reported in NSHL patients in Iran. Based on the literature, GJB2, SLC26A4, MYO15A, MYO7A, CDH23, and TMC1 genes are among the most common causes of NSHL in Iran, respectively, and their distribution is different in various populations. In addition, missense mutation is the most common reported mutation. Conclusion: This study while confirming the high genetic heterogeneity of NSHL in Iran, emphasizes the importance and revolutionary impact of next generation sequencing (NGS) techniques in diagnosing the genetic cause of hearing impairment in different populations of Iran. Such an approach can play a significant role in genetic counseling, prenatal diagnosis and clinical management of hearing impairment in affected families. SP - 722 EP - 738 AU - Ajam-Hossieni, Mobarakeh AU - Parvini, Farshid AU - Angaji, Abdolhamid AD - Department of Biology, Faculty of Basic Sciences, Semnan University, Semnan, I.R. Iran. KW - Hearing impairment KW - Sensorineural hearing loss KW - Genetics of deafness KW - Genetic heterogeneity KW - Nonsyndromic hearing loss UR - http://feyz.kaums.ac.ir/article-1-4691-en.html DO - 10.48307/FMSJ.2022.26.6.722 ER -