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  • Title: A truncating DUOX2 mutation (R434X) causes severe congenital hypothyroidism.
    Author: Cangul H, Aycan Z, Kendall M, Bas VN, Saglam Y, Barrett TG, Maher ER.
    Journal: J Pediatr Endocrinol Metab; 2014 Mar; 27(3-4):323-7. PubMed ID: 24127536.
    Abstract:
    Mutations in DUOX2 have been reported to cause congenital hypothyroidism (CH), and our aim in this study was to determine the genetic basis of CH in two affected individuals coming from a consanguineous family. Because CH is usually inherited in autosomal recessive manner in consanguineous/multicase families, we adopted a two-stage strategy of genetic linkage studies and targeted sequencing of the candidate genes. First, we investigated the potential genetic linkage of the family to any known CH locus using microsatellite markers and then screened for mutations in linked genes by Sanger sequencing. The family showed potential linkage to DUOX2 locus and we detected a nonsense mutation (R434X) in both cases and the mutation segregated with disease status in the family. This study highlights the importance of molecular genetic studies in the definitive diagnosis and classification of CH, and it also suggests a new clinical testing strategy using next-generation sequencing in all primary CH cases.
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