Abstract:
:Junctional epidermolysis bullosa (JEB) is a heterogeneous autosomal recessively inherited blistering skin disorder associated with fragility at the dermal-epidermal junction. Characteristic ultrastructural findings in JEB are abnormalities in the hemidesmosome-anchoring filament complexes. These focal attachment structures, which extend from the intracellular compartment of the basal keratinocytes to the underlying basement membrane, have been shown to be hypoplastic or rudimentary in different forms of JEB. Previously, in different JEB phenotypes, mutations have been found in the three genes for the anchoring filament component laminin 5 (LAMA3, LAMB3, and LAMC2) and in the gene for the hemidesmosome-associated integrin beta 4 subunit. Here, we describe the first mutations in the gene encoding the 180-kD bullous pemphigoid antigen (BPAG2), a transmembranous hemidesmosomal collagen, also known as type XVII collagen (COL17A1). The patient is affected with generalized atrophic benign epidermolysis bullosa (GABEB), a rare variant of JEB, and is a compound heterozygote for premature termination codons on both alleles. These novel findings emphasize the molecular heterogeneity of this group of genodermatoses, and attest to the importance of BPAG2 in maintaining adhesion between the epidermis and the dermis.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
McGrath JA,Gatalica B,Christiano AM,Li K,Owaribe K,McMillan JR,Eady RA,Uitto Jdoi
10.1038/ng0995-83subject
Has Abstractpub_date
1995-09-01 00:00:00pages
83-6issue
1eissn
1061-4036issn
1546-1718journal_volume
11pub_type
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