Epidermolysis bullosa simplex due to bi-allelic DST mutations: Case series and review of the literature

Dalit Ganani, Kiril Malovitski, Ofer Sarig, Andrea Gat, Eli Sprecher, Liat Samuelov*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Epidermolysis bullosa simplex (EBS) is a heterogeneous group of inherited disorders characterized by skin fragility due to intraepidermal separation. Most cases result from heterozygous mutations in KRT5 or KRT14; however, a minority of affected individuals carry mutations in non-keratin genes including DST encoding an epithelial isoform of dystonin. DST-associated EBS is transmitted as an autosomal recessive trait. Here, we report a series of EBS patients carrying bi-allelic DST mutations and review previously reported cases aiming to delineate phenotype-genotype correlations. Methods: Whole-exome and direct sequencing were used for variant analysis. Review of previously reported cases was performed. Results: Mutation analysis revealed DST mutations in five patients belonging to three families. Two variants have not been previously reported: c.7097dupA (p.Tyr2366X) and c.7429delC (p.Leu2477Serfs*13). We identified an additional six cases in the literature, bringing the total number of individuals affected with EBS due to DST variants to 11. Patients displayed distinctive phenotypes regardless of the causative variant. Conclusions: The current study expands the clinical and genetic spectrum of DST-associated EBS subtype.

Original languageEnglish
Pages (from-to)436-441
Number of pages6
JournalPediatric Dermatology
Volume38
Issue number2
DOIs
StatePublished - 1 Mar 2021

Keywords

  • BPAG1-e
  • DST
  • epidermolysis bullosa

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