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Iranian Journal of Public Health، جلد ۴۹، شماره ۱۱، صفحات ۲۱۲۸-۲۱۳۵
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عنوان انگلیسی Gjb3 Gene Mutations in Non-Syndromic Hearing Loss of Bloch, Kurd, and Turkmen Ethnicities in Iran
چکیده انگلیسی مقاله Background: Hearing loss (HL) is one of the most common heterogeneous congenital disabilities worldwide. Gap junction protein β-3 (GJB3) gene encodes Connexin31 protein (Cx31). The hereditary type of hearing impairment in this gene are known to cause both autosomal recessive and autosomal dominant form. In addition, GJB3 mutations have been involved in sensorineural deafness, erythrokeratodermia variabilis (EKV), and neuropathy diseases. We aimed to investigate GJB3 mutations in people suffering from HL among three different ethnicities of Iranian population (Baloch, Kurd, and Turkmen). Methods: In this descriptive study, 50 GJB2-negative non-syndromic hearing loss (NSHL) Iranian individuals from 3 ethnic groups of Baloch (n=17), Kurd (n =15) and Turkmen (n=18) were enrolled.  DNA extractions, PCR, and mutation detection was carried out for the two large deletions of the GJB6, del (GJB6 -D13S1830,) and del (GJB6 -D13S1854) followed by direct DNA sequencing method for the GJB3. Results: DNA sequencing of GJB3 was shown a missense heterozygous mutation rs199689484 (NM_024009.3) GJB3: c.340G>A (p.Ala114Thr) in a Baloch patient, and a polymorphism rs35983826 (NM_024009.3) GJB3: c.798C>T (p.Asn266=) in a Turkman patient, in coding region of the GJB3. We did not detect del (GJB6 -D13S1830) and del (GJB6 -D13S1854) among these three ethnicities in Iran. Conclusion: Deafness is a heterogeneous disorder. Specific genes and mutations contribute to hearing loss that varies from locus to locus as well as from population to population.
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نویسندگان مقاله | Farnoush ALIAZAMI
Department of Genetics, Tehran Medical Branch, Islamic Azad University, Tehran, Iran AND Applied Biotechnology Research Center, Tehran Medical Branch, Islamic Azad University, Tehran, Iran


| Dariush D. FARHUD
School of Public Health, Tehran University of Medical Sciences, Tehran, Iran AND Department of Basic Sciences, Iranian Academy of Medical Sciences, Tehran, Iran


| Marjan ZARIF-YEGANEH
Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran


| Siamak SALEHI
Institute of Liver Studies, King's College Hospital, London, United Kingdom


| Azam HOSSEINIPOUR
Department of Exceptional Children, Ministry of Education and Training of the Islamic Republic of Iran, Tehran, Iran


| Roxana SASANFAR
Psychiatric and Neurodevelopmental Genetic Unit, Massachusetts General Hospital, Harvard Medical School, Boston, USA


| Maryam Eslami
Department of Genetics, Tehran Medical Branch, Islamic Azad University, Tehran, Iran AND Applied Biotechnology Research Center, Tehran Medical Branch, Islamic Azad University, Tehran, Iran
نشانی اینترنتی https://ijph.tums.ac.ir/index.php/ijph/article/view/19049
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