Transglutaminase-1 mutations in Omani families with lamellar ichthyosis

Aisha Al-Naamani, Ahmed Al-Waily, Mohammed Al-Kindi, Maha Al-Awadi, Said Ali Al-Yahyaee

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Objective: To determine the molecular basis of familial ichthyosis in three Omani families. Subjects and Methods: Nine patients from three consanguineous families, A, B, and C, were born with typical features of lamellar ichthyosis subtype including collodion membrane and maintained ectropion, and epidermal scaling through their childhood. The 4 patients from family B had more severe symptoms requiring neonatal critical care and subsequent regular treatment with emollients, eye lubricants, and low-dose acitretin. DNA was extracted from peripheral blood by standard methods. The samples were initially genotyped to screen known loci linked to recessive ichthyosis on chromosomes 2q33-32 (ABCA12), 14q11 (TGM1), and 19p12-q12 using commercially supplied polymorphic fluorescent microsatellite markers. TGM1 was analyzed by direct sequencing for disease-associated mutations. Results: Two known pathogenic mutations in TGM1 were detected: p.Gly278Arg in families A and B and p.Arg396His in family C. These two mutations were segregating in an autosomal recessive mode of inheritance. Conclusion: Two known pathogenic TGM1 mutations were detected in three large consanguineous Omani families with lamellar ichthyosis. This study confirmed the geographic distribution of known mutations to an apparently unrelated population.

Original languageEnglish
Pages (from-to)438-443
Number of pages6
JournalMedical Principles and Practice
Issue number5
Publication statusPublished - Sept 2013


  • Collodion baby
  • Oman
  • Scaly skin
  • TGM1

ASJC Scopus subject areas

  • General Medicine


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