A novel mutation in ST14 at a functionally significant amino acid residue expands the spectrum of ichthyosis-hypotrichosis syndrome.

Authors

Leila Youssefian, Thomas Jefferson University; Tehran University of Medical SciencesFollow
Andrew Touati, Thomas Jefferson UniversityFollow
Amir Hossein Saeidian, Thomas Jefferson UniversityFollow
Omid Zargari, Dana Clinic
Sirous Zeinali, Pasteur Institute of Iran; Kawsar Human Genetics Research Center
Hassan Vahidnezhad, Thomas Jefferson University; Pasteur Institute of IranFollow
Jouni Uitto, Thomas Jefferson UniversityFollow

Document Type

Article

Publication Date

12-6-2017

Comments

This article has been peer reviewed. It is the author’s final published version in Orphanet Journal of Rare Diseases

Volume 12, Issue 1, December 2017, Article number 176

The published version is available at DOI: 10.1186/s13023-017-0728-8. Copyright © Youssefian et al.

Abstract

BACKGROUND: Mutations in the ST14 gene, encoding the serine protease matriptase, have been associated with ichthyosis-hypotrichosis syndrome (IHS), a Mendelian disorder with skin and hair manifestations which include, in addition to ichthyosis and hypotrichosis, hypohidrosis and follicular atrophoderma. However, the understanding of the specific consequences of mutations in ST14 on the development of this syndrome is incomplete.

RESULTS: Using a targeted next-generation sequencing array of 38 ichthyosis-associated genes on a large cohort of 180 ichthyosis patients from a primarily consanguineous background, a previously unreported homozygous p.Asp482Asn mutation in ST14 was identified in a patient with IHS. This mutation affects an essential site within a ligand-binding domain of matriptase. Comparison with previous reports of IHS allowed further delineation of the phenotype of IHS in correlation with mutations present in these patients. Histological and ultrastructural analysis of skin and hair identified novel features in this disorder.

CONCLUSIONS: This study correlates genotypic and phenotypic features of the rare disorder, IHS, expands the spectrum of pathology associated with the disorder, and provides clinical evidence of the importance of the Asp482 amino acid, previously shown to have an essential role in matriptase activation.

Recommended Citation

Youssefian, Leila; Touati, Andrew; Saeidian, Amir Hossein; Zargari, Omid; Zeinali, Sirous; Vahidnezhad, Hassan; and Uitto, Jouni, "A novel mutation in ST14 at a functionally significant amino acid residue expands the spectrum of ichthyosis-hypotrichosis syndrome." (2017). Department of Dermatology and Cutaneous Biology Faculty Papers. Paper 85.
https://jdc.jefferson.edu/dcbfp/85

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 License.

PubMed ID

29208051