Pendred syndrome and DFNB4-mutation screening of SLC26A4 by denaturing high-performance liquid chromatography and the identification of eleven novel mutations

Authors

  • Sai Prasad,

    1. Molecular Otolaryngology Research Laboratories, Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa
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  • Karen A. Kölln,

    1. Molecular Otolaryngology Research Laboratories, Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa
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  • Robert A. Cucci,

    1. Molecular Otolaryngology Research Laboratories, Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa
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  • Richard C. Trembath,

    1. Department of Genetics and Medicine, University of Leicester, Leicester, United Kingdom
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  • Guy Van Camp,

    1. Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
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  • Richard J.H. Smith

    Corresponding author
    1. Molecular Otolaryngology Research Laboratories, Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa
    • Molecular Otolaryngology Research Laboratories, Department of Otolaryngology-Head and Neck Surgery, 200 Hawkins Dr., Iowa City, IA 52242.
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Abstract

Mutations in SLC26A4 cause Pendred syndrome, an autosomal-recessive disorder characterized by sensorineural deafness and goiter, and DFNB4, a type of autosomal recessive nonsyndromic deafness in which, by definition, affected persons do not have thyromegaly. The clinical diagnosis of these two conditions is difficult, making mutation screening of SLC26A4 a valuable test. Although screening can be accomplished in a variety of ways, all techniques are not equally accurate, timely or cost effective. We found single-strand conformational polymorphism analysis (SSCP) to be 63% effective in detecting mutations a panel of different SLC26A4 allele variants when compared to data from direct sequencing. Because direct sequencing can be time consuming and expensive, especially for a gene with 21 exons, we studied DHPLC as an alternative screening method. We found DHPLC as accurate and reliable as direct sequencing but to be more rapid and cost effective. In addition, we report 11 novel disease-causing allele variants of SLC26A4. © 2003 Wiley-Liss, Inc.

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