Journals / Kulak Burun Boğaz İhtisas Dergisi / 2010 / Cilt: 20 - Sayı: 5

Genetic constitution analysis of idiopathic sudden hearing loss

İdyopatik ani işitme kayıplı olguların genetik yapılarının analizi

Pages
219–225
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

These studies should be performed on larger series, and should include family members of patients with sudden hearing loss.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Objectives: The purpose of this research is to understand the etiology of sudden hearing loss due to genetic factors in Turkish people.
📊
Key Findings & Data:Patients and Methods: Forty patients (Group 1; 19 males, 21 females; mean age 37.9±15.6 years; range 9 to 76 years) who presented with sudden hearing loss to the Ear, Nose and Throat Clinic of Medical Faculty Hospital of Cumhuriyet University between January 2008 and June 2009, and were diagnosed with sudden hearing loss through history, physical examination and review of audiometric findings, and 20 healthy volunteers (Group 2; 14 males, 6 females; mean age 31.7±4.4 years; range 24 to 43 years) for the control group were included in this study.
💡
Conclusion & Impact:These studies should be performed on larger series, and should include family members of patients with sudden hearing loss.
🔬Design:Review & Systematic Survey
📍Scope:2008 Verileri
⚙️Variables:Domain Parameters

Abstract

Objectives: The purpose of this research is to understand the etiology of sudden hearing loss due to genetic factors in Turkish people. Determination of these genetic factors and better understanding of molecular pathogenesis may guide more realistic planning and treatment recommendations. Patients and Methods: Forty patients (Group 1; 19 males, 21 females; mean age 37.9±15.6 years; range 9 to 76 years) who presented with sudden hearing loss to the Ear, Nose and Throat Clinic of Medical Faculty Hospital of Cumhuriyet University between January 2008 and June 2009, and were diagnosed with sudden hearing loss through history, physical examination and review of audiometric findings, and 20 healthy volunteers (Group 2; 14 males, 6 females; mean age 31.7±4.4 years; range 24 to 43 years) for the control group were included in this study. All Patients were evaluated by the genetic clinic for the GJB2, GJB3, GJB6 and WFS1 gene using multiplex ligation-dependent probe amplification (MLPA) method mutation analysis. Results: No difference was found in the peripheral blood sample analyses of the two groups at WFS1 exon 8 and connexin 26, 30 and 31 gene zones using the MLPA method with respect to heterozygous mutation (p=0.291, p>0.05). In four patients in group 1 heterozygous mutation was detected at the target gene zone. Heterozygous mutation was in the WFS1 exon 8 zone in two patients; and in the WFS1 exon 1 zone in other two patients. Conclusion: Sudden hearing loss studies in the future should include connexin 26, connexin 30 and other gene mutations that may affect the function of the gap-junction located in the region of the cochlea stria vascularis (stV), basal membrane (BM), spiral limbus (Li) and spiral ligament (SL). These studies should be performed on larger series, and should include family members of patients with sudden hearing loss.

Özet

Amaç: Bu araştırmada Türk toplumunda ani işitme kaybına yol açan genetik faktörlerin nedeninin belirlenmesi amaçlandı. Bu genetik etmenlerin bilinmesi, toplumumuzda görülen ani işitme kaybının moleküler patogenezinin daha iyi anlaşılabilmesini ve tedavisi için daha gerçekçi yaklaşımların bulunabilmesini sağlayacaktır. Hastalar ve Yöntemler: Cumhuriyet Üniversitesi Tıp Fakültesi Hastanesi Kulak Burun Boğaz Kliniğine Ocak 2008 - Haziran 2009 tarihleri arasında ani işitme kaybı ile başvuran, öykü, fizik muayene ve odyolojik inceleme sonucunda ani işitme kaybı tanısı konulan 40 hasta (Grup 1; 19 erkek, 21 kadın; ort. yaş 37.9±15.6 yıl; dağılım 9-76 yıl) ve işitme kaybı öyküsü olmayan 20 sağlıklı gönüllü (Grup 2: Kontrol grubu; 14 erkek, 6 kadın; ort. yaş 31.7±4.4 yıl; dağılım 24-43 yıl) çalışmaya dahil edildi. Hastaların tümü Genetik kliniği tarafından değerlendirildi ve MLPA (Multiplex ligation-dependent probe amplification) yöntemi ile GJB2, GJB3, GJB6 ve WFS1 genlerine yönelik mutasyon analizi yapıldı. Bulgular: Hastaların periferik kan örneklerinin WFS1 ekson 8 ve konneksin 26, 30 ve 31 gen bölgelerinde heterozigot mutasyon açısından MLPA yöntemi kullanılarak yapılan analizlerinde iki grup arasında istatistiksel açıdan bir fark saptanmadı (p=0.291, p>0.05). Grup 1’deki dört hastada (%10) değerlendirilen hedef gen bölgelerinde heterozigot mutasyon saptandı. Heterozigot mutasyon bu hastaların ikisinde WFS1 ekson 8 bölgesinde; ikisinde ise WFS1 ekson 1 bölgesinde idi. Sonuç: Gelecekte yapılacak ani işitme kaybı çalışmaları kokleada stria vascularis (stV), bazal membran (BM), spiral limbus (Li) ve spiral ligament (SL) bölgelerinde yer alan konneksin 26, konneksin 30 ve diğer gap-junction fonksiyonlarını etkileyebilecek gen mutasyonlarını içermelidir. Bu çalışmalar geniş katılımlı hasta gruplarıyla ve ani işitme kayıplı bireylerin aile fertlerinin de bu çalışmalara katılımıyla yapılmalıdır.

🔖

Cite This Article

BORA, A., ALTUNTAŞ, E. E., ÖZDEMİR, Ö., UYSAL, İ. Ö., MÜDERRİS, S. (2010). Genetic constitution analysis of idiopathic sudden hearing loss. Kulak Burun Boğaz İhtisas Dergisi, Cilt: 20 - Sayı: 5, 219–225. https://ajindex.com/articles/343266

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (16)

  1. Duckert LG. Anatomy of the skull base, temporal bone, external ear, and middle ear. In: Cummings CW, Frederickson JM, Harker LA, Krause CJ, Richardson MA, Schüller DE, editors. Otolaryngology head & neck surgery. 3rd ed. St. Louis: Mosby; 1998. p. 2533-46
  2. Shikowitz MJ. Sudden sensorineural hearing loss. Med Clin North Am 1991;75:1239-50
  3. Nomura Y. Diagnostic criteria for sudden deafness, mumps deafness and perilymphatic fistula. Acta Otolaryngol Suppl 1988;456:7-8
  4. Gürsan Ö, Akçay A. Ani işitme kayıpları. Türk ORL Arşivi 1992;30:17-9
  5. Moskowitz D, Lee KJ, Smith HW. Steroid use in idiopathic sudden sensorineural hearing loss. Laryngoscope 1984;94:664-6
  6. Lamm K, Lamm H, Arnold W. Effect of hyperbaric oxygen therapy in comparison to conventional or placebo therapy or no treatment in idiopathic sudden hearing loss, acoustic trauma, noise-induced hearing loss and tinnitus. A literature survey. Adv Otorhinolaryngol 1998;54:86-99
  7. Özkarataş H. İşitme kaybı ve genetik. In: Koç C, editör. Kulak burun boğaz hastalıkları ve baş ve boyun cerrahisi. Bölüm 4.4, 1. Baskı. Ankara: Güneş Kitapevi; 2004. s. 89-108
  8. Fetterman BL, Saunders JE, Luxford WM. Prognosis and treatment of sudden sensorineural hearing loss. Am J Otol 1996;17:529-36
  9. Vasama JP, Linthicum FH Jr. Idiopathic sudden sensorineural hearing loss: temporal bone histopathologic study. Ann Otol Rhinol Laryngol 2000; 109:527-32
  10. Lazarini PR, Camargo AC. Idiopathic sudden sensorineural hearing loss: etiopathogenic aspects. Braz J Otorhinolaryngol 2006;72:554-61
  11. Rauch SD. Intratympanic steroids for sensorineural hearing loss. Otolaryngol Clin North Am 2004; 37:1061-74
  12. Penido NO, Cruz OL, Zanoni A, Inoue DP. Classification and hearing evolution of patients with sudden sensorineural hearing loss. Braz J Med Biol Res 2009;42:712-6
  13. Lingala HB; Sankarathi, Penagaluru PR. Role of connexin 26 (GJB2) & mitochondrial small ribosomal RNA (mt 12S rRNA) genes in sporadic & aminoglycosideinduced non syndromic hearing impairment. Indian J Med Res 2009;130:369-78
  14. Jacobs HT, Hutchin TP, Käppi T, Gillies G, Minkkinen K, Walker J, et al. Mitochondrial DNA mutations in patients with postlingual, nonsyndromic hearing impairment. Eur J Hum Genet 2005;13:26-33
  15. Loughran S. Management of sudden sensorineural hearing loss: a consultant survey. J Laryngol Otol 2000; 114:837-9
  16. Lefebvre PP, Van De Water TR. Connexins, hearing and deafness: clinical aspects of mutations in the conn