ANKYLOBLEPHARON-ECTODERMAL DEFECTS-CLEFT LIP-PALATE SYNDROME DUE TO A NOVEL MISSENSE MUTATION IN THE SAM DOMAIN OF THE TP63 GENE
Tajir M1,2,3,*, Lyahyai J1,2, Guaoua S1,2, El Alloussi M4, Sefiani A1,2
*Corresponding Author: Dr. Mariam Tajir, Medical genetics laboratory, Faculty of Medicine and Pharmacy, Mohamed Premier University, B.P 4867 Oujda l’Université, 60049 Oujda, Morocco. Tel: +212(0)-536-531-414. Fax: +212(0)-536-531-919. E-mail: mariam_tajir@yahoo.fr
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Abstract

Ankyloblepharon-ectodermal defects-cleft lip/palate (AEC) syndrome is a rare genetic disease with an autosomal dominant transmission, characterized by several congenital anomalies. Clinical features include ectodermal defects affecting the skin, hair, teeth, nails and sweat glands, associated with typical eyelid fusion in addition to a cleft lip and/or palate. The diagnosis is based on clinical criteria and molecular genetic testing of TP63 gene, the gene related to AEC syndrome. In this context, most reported mutations induce an amino acid change in the sterile alpha motif (SAM) domain, and are predicted to disrupt protein-protein interactions. We here describe the case of a 2-year-old Moroccan girl diagnosed with AEC syndrome on the basis of clinical features. The molecular studies and bioinformatics tools revealed a novel heterozygous missense mutation c.1798G>C (p.Gly600Arg) in exon 14 of the TP63 gene, that was not found in her parents. The molecular analysis and the early diagnosis of this syndrome are important to offer appropriate genetic counseling and management to patients and their families.



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