Journals / Medeniyet Medical Journal / 2022 / Cilt: 37 - Sayı: 2

Genetic Etiology of Ichthyosis in Turkish Patients: Nextgeneration Sequencing Identified Seven Novel Mutations

Türk Hastalarda İktiyozisin Genetik Nedenleri: Yeni Nesil Dizileme Yedi Yeni Mutasyon Tanımladı

Pages
126–130
Publication Date
2022-10-19
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)

This study is the first and largest research from Turkey using NGS that highlights all ichthyosis subtypes.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Objective: Ichthyosis is a clinically heterogeneous group of genodermatoses characterized by widespread drying and scaling of the skin.
📊
Key Findings & Data:It is also a genetically heterogeneous disorder, and 67 genes associated with the disease have been identified to date.
💡
Conclusion & Impact:This study is the first and largest research from Turkey using NGS that highlights all ichthyosis subtypes.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: Ichthyosis is a clinically heterogeneous group of genodermatoses characterized by widespread drying and scaling of the skin. It is also a genetically heterogeneous disorder, and 67 genes associated with the disease have been identified to date. However, there are still undiscovered genes causing the disease. Methods: We investigated 19 Turkish patients from 17 unrelated families using clinical exome sequencing or multigene panel screening. Results: Sixteen likely pathogenic or pathogenic variants were detected in 13 unrelated patients. We identified “variant of unknown significance” alteration in only one patient. Seven novel variants were identified in ABCA12, ALOX12B, and ALOXE3. The most commonly mutated gene was TGM1, followed by ABCA12 and ALOX12B. Conclusions: Because of the wide genetic variability of ichthyosis, it is difficult to diagnose the disease quickly and definitively. The clinical use of next-generation sequencing (NGS) methodologies is beneficial in the diagnostic approach to ichthyosis and genetic counseling. This study highlights the underlying molecular cause of ichthyosis by determining the mutational spectrum in a cohort of 19 patients. This study is the first and largest research from Turkey using NGS that highlights all ichthyosis subtypes.

Özet

Amaç: İktiyozis, deride pullanma ve yaygın kuruma ile karakterize klinik olarak heterojen bir genodermatoz grubudur. Aynı zamanda genetik olarak heterojen bir hastalıktır ve bugüne kadar hastalıkla ilişkili 67 farklı gen tanımlanmıştır. Bununla birlikte, hastalığa neden olan hala keşfedilmemiş genler de bulunmaktadır. Yöntemler: Klinik ekzom dizileme veya çoklu gen paneli kullanarak, akraba olmayan 17 aileden 19 Türk hastayı araştırdık. Bulgular: Aralarında akrabalık bulunmayan 13 hastada 16 olası patojenik veya patojenik değişim tespit edildi. Sadece bir hastada “klinik önemi bilinmeyen” değişim saptadık. ABCA12, ALOX12B ve ALOXE3 genlerinde yedi yeni varyant tanımlandı. En yaygın mutasyona uğramış gen TGM1 olup, bunu ABCA12 ve ALOX12B genleri izlemektedir. Sonuçlar: İktiyozisin geniş genetik değişkenlik göstermesi nedeniyle, hastalığı hızlı ve kesin olarak teşhis etmek zordur. Yeni nesil dizi analizi (NGS) metodolojilerinin klinik kullanımı, iktiyozisin genetik danışmanlığı ve tanısal yaklaşımında faydalıdır. Bu araştırma, 19 hastadan oluşan bir kohortta mutasyon spektrumunu belirleyerek iktiyozisin altta yatan moleküler nedenlerini açıklamaktadır. Bu çalışma, NGS yöntemi ile tüm iktiyozis alt tiplerini araştıran, Türkiye’deki ilk ve en büyük araştırmadır.

🔖

Cite This Article

DÜZKALE, N., GÖNÜL, M., BAHŞİ, T., ŞAHİN, İ., SAAT, H. (2022). Genetic Etiology of Ichthyosis in Turkish Patients: Nextgeneration Sequencing Identified Seven Novel Mutations. Medeniyet Medical Journal, Cilt: 37 - Sayı: 2, 126–130. https://ajindex.com/articles/579130

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (14)

  1. Schmuth M, Martinz V, Janecke AR, et al. Inherited ichthyoses/ generalized Mendelian disorders of cornification. Eur J Hum Genet. 2013;21:12-33
  2. Akiyama M, Shimizu H. An update on molecular aspects of the non-syndromic ichthyoses. Exp Dermatol. 2008;17:373‑82
  3. Oji V, Tadini G, Akiyama M, et al. Revised nomenclature and classification of inherited ichthyoses: results of the First Ichthyosis Consensus Conference in Soreze 2009. J Am Acad Dermatol. 2010;63:607-41
  4. Akiyama M. FLG mutations in ichthyosis vulgaris and atopic eczema: spectrum of mutations and population genetics. Br J Dermatol. 2010;162:472-7
  5. Vahlquist A, Fischer J, Törmä H. Inherited Nonsyndromic Ichthyoses: An Update on Pathophysiology, Diagnosis and Treatment. Am J Clin Dermatol. 2018;19:51-66
  6. Diociaiuti A, Rosati E, Paglietti MG, et al. Ichthyosis Prematurity Syndrome due to a Novel SLC27A4 Homozygous Mutation in an Italian Patient. Acta Derm Venereol. 2018;98:803-4
  7. Kelsell DP, Norgett EE, Unsworth H, et al. Mutations in ABCA12 underlie the severe congenital skin disease harlequin ichthyosis. Am J Hum Genet. 2005;76:794-803
  8. Richard G. Autosomal Recessive Congenital Ichthyosis. 2001 Jan 10 [updated 2017 May 18]. In: Adam MP, Ardinger HH, Pagon RA, Wallace SE, Bean LJH, Gripp KW, Mirzaa GM, Amemiya A, editors. GeneReviews® [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2021
  9. Uitto J, Youssefian L, Saeidian AH, Vahidnezhad H. Molecular Genetics of Keratinization Disorders-What’s New About Ichthyosis. Acta Derm Venereol. 2020;100:adv00095
  10. Skaaby T, Husemoen LL, Thyssen JP, et al. Filaggrin loss-offunction mutations and incident cancer: a population-based study. Br J Dermatol. 2014;171:1407-14
  11. Richards S, Aziz N, Bale S, et al. Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology. Genet Med. 2015;17:405-24
  12. Kiener S, Wiener DJ, Hopke K, et al. ABHD5 frameshift deletion in Golden Retrievers with ichthyosis. G3 (Bethesda). 2022;12:jkab397
  13. Rodríguez-Pazos L, Ginarte M, Fachal L, Toribio J, Carracedo A, Vega A. Analysis of TGM1, ALOX12B, ALOXE3, NIPAL4 and CYP4F22 in autosomal recessive congenital ichthyosis from Galicia (NW Spain): evidence of founder effects. Br J Dermatol. 2011;165:906-11
  14. Lesueur F, Bouadjar B, Lefèvre C, et al. Novel mutations in ALOX12B in patients with autos