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Abstract
Skin biopsies from four patients with similar clinical phenotypes of non-lethal junctional
epidermolysis bullosa (JEB) were investigated by electron microscopy and immunohistochemistry.
Electron microscopy revealed cleavage within the lamina lucida in each case, but in
addition, there was considerable variability in the number and ultrastructure of hemidesmosome-anchoring
filament complexes. Immunohistochemical staining of the dermal-epidermal junction,
using monoclonal antibodies to laminin 5 and the 180-kDa bullous pemphigoid antigen,
showed reduced laminin 5 staining with normal 180-kDa bullous pemphigoid antigen labelling
in two cases, and reduced or absent 180-kDa bullous pemphigoid antigen staining with
normal laminin 5 labelling in the other two cases. Whereas electron microscopy is
invaluable for the diagnosis of JEB as a group of diseases, immunohistochemistry is
able to provide insight into the molecular pathology of non-lethal JEB and reveal
abnormalities in candidate genes and proteins underlying this group of genetic blistering
disorders.
Keywords
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Article info
Publication history
Accepted:
April 22,
1996
Received in revised form:
March 26,
1996
Received:
January 30,
1996
Identification
Copyright
© 1997 Published by Elsevier Inc.