A novel EDA variant causing X-linked hypohidrotic ectodermal dysplasia: Case report

Baiba Alksere (Coresponding Author), Liene Kornejeva, Ieva Grinfelde, Aigars Dzalbs, Dace Enkure, Una Conka, Santa Andersone, Arita Blumberga, Liene Nikitina-Zake, Liga Kangare, Ilze Radovica-Spalvina, Inta Vasiljeva, Linda Gailite, Juris Erenpreiss, Violeta Fodina

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Abstract

Hereditary ectodermal dysplasias are a complex group of inherited disorders characterised by abnormalities in two or more ectodermal derivatives (skin, nails, sweat glands, etc.). There are two main types of these disorders – hidrotic and hypohidrotic/anhidrotic ectodermal dysplasias. Hypohidrotic ectodermal dysplasia (HED) or Christ-Siemens-Touraine syndrome (OMIM: 305100) occurs in 1 out of 5000–10,000 births [19] and has an X-linked recessive inheritance pattern (X-linked hypohydrotic ectodermal dysplasia – XLHED) [2]. The main cause of XLHED is a broad range of pathogenic variants in the EDA gene (HGNC:3157, Xq12-13) which encodes the transmembrane protein ectodysplasin-A [4]. We report here the case of a patient with a novel inherited allelic variant in the EDA gene – NM_001399.5:c.337C>T (p.Gln113*) – in the heterozygous state. Targeted family member screening was conducted and other carriers of this EDA gene pathogenic variant were identified and phenotypically characterised. The patient subsequently underwent in vitro fertilisation with preimplantation genetic testing for monogenic diseases (PGT-M).

Original languageEnglish
Article number100796
JournalMolecular Genetics and Metabolism Reports
Volume29
DOIs
Publication statusPublished - Dec 2021

Keywords*

  • Christ-Siemens-Touraine syndrome
  • Ectodermal dysplasia
  • EDA
  • PGT-M
  • X-linked recessive disorder
  • XLHED

Field of Science*

  • 1.6 Biological sciences
  • 3.1 Basic medicine
  • 3.2 Clinical medicine

Publication Type*

  • 1.1. Scientific article indexed in Web of Science and/or Scopus database

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