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Mutation analysis in the family of a Taiwanese boy with with epidermolysis bullosa simplex dowling-meara.

Authors: C C, Ning; S C, Chao; J, Uitto; C C, Shieh; J Y, Lee;

Mutation analysis in the family of a Taiwanese boy with with epidermolysis bullosa simplex dowling-meara.

Abstract

Epidermolysis bullosa simplex (EBS) is a group of hereditary bullous diseases characterized by intraepidermal blistering due to mechanical stress-induced degeneration of basal keratinocytes. The major subtypes of EBS, including EBS Dowling-Meara (EBS-DM), are caused by mutations of the basal keratin genes, keratin 5 (KRT5) or keratin 14 (KRT14). Here, we describe the first reported pedigree of EBS-DM in Taiwan. The proband was a 5-day-old newborn, who presented with numerous blisters of various sizes, some of which were hemorrhagic, as well as erosions on the extremities and hard palate since birth. Biopsy of a new vesicle showed subepidermal and basal cleavage with infiltration of eosinophils and neutrophils. Electron microscopy revealed cytolysis of basal cells and clumping of tonofilaments forming thick bundles and peculiar electron-dense round or oval basket-weave bodies. These features are characteristic of EBS-DM. The proband's mother had also suffered from a similar blistering disorder since birth, with gradual appearance of mottled pigmentation on the trunk, diffuse irregular or linear palmoplantar hyperkeratosis, and nail dystrophy. Mutation analysis revealed a heterozygous point mutation (R125C) in helix 1A of keratin 14 in the proband and his mother. The detection of this pathogenic point mutation enables future prenatal diagnosis in this family.

Keywords

Male, Epidermolysis Bullosa Simplex, DNA Mutational Analysis, Infant, Newborn, Humans, Keratins, Point Mutation, Pedigree, Skin

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
5
Average
Average
Average
gold