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  • Title: A novel WNT10A mutation causes non-syndromic hypodontia in an Egyptian family.
    Author: Abdalla EM, Mostowska A, Jagodziński PP, Dwidar K, Ismail SR.
    Journal: Arch Oral Biol; 2014 Jul; 59(7):722-8. PubMed ID: 24798981.
    Abstract:
    OBJECTIVE: Tooth agenesis is the most common dental anomaly, whose aetiology still remains to be fully elucidated. The aim of this study was to investigate the genetic cause of non-syndromic hypodontia with clinical variability in an Egyptian family. DESIGN: The entire coding regions including exon-intron boundaries of the MSX1, PAX9 and WNT10A genes were investigated by direct sequencing in all affected family members. RESULTS: Novel heterozygous mutation inherited in an autosomal dominant manner was identified in the WNT10A gene. This 21-bp deletion combined with 1-bp insertion, c.-14_7delinsC, eliminates the translation initiation codon leading to either no protein production or translation of alternative open reading frames. None of the control subjects (400 chromosomes) were carriers of this novel WNT10A mutation. No pathogenic mutations were found in the MSX1 and PAX9 genes. CONCLUSIONS: The novel c.-14_7delinsC mutation might be the etiological variant of the WNT10A gene responsible for the permanent tooth agenesis in the Egyptian family. WNT10A is a major candidate gene for non-syndromic hypodontia.
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