Type VII collagen is expressed but anchoring fibrils are defective in dystrophic epidermolysis bullosa inversa

L BRUCKNER‐TUDERMAN, KM NIEMI… - British Journal of …, 1990 - academic.oup.com
L BRUCKNER‐TUDERMAN, KM NIEMI, M KERO, URSW SCHNYDER, T REUNALA
British Journal of Dermatology, 1990academic.oup.com
SUMMARY A patient with dystrophic epidermolysis bullosa inversa was studied using
electron microscopy and indirect immunofluorescence using antibodies to matrix
macromolecules of the dermo‐epidermal junction zone. There was splitting below the
lamina densa with an apparently normal basement membrane, but a lack of intact anchoring
fibrils and with a disarranged papillary connective tissue. Indirect immunofluorescence
examination with antibodies to type VII collagen, the major structural protein of anchoring …
Summary
A patient with dystrophic epidermolysis bullosa inversa was studied using electron microscopy and indirect immunofluorescence using antibodies to matrix macromolecules of the dermo‐epidermal junction zone. There was splitting below the lamina densa with an apparently normal basement membrane, but a lack of intact anchoring fibrils and with a disarranged papillary connective tissue. Indirect immunofluorescence examination with antibodies to type VII collagen, the major structural protein of anchoring fibrils, showed a normal linear staining pattern. Synthesis of type VII collagen which is unable to form stable, resistant anchoring fibrils may be a distinct feature of this subtype of recessive dystrophic epidermolysis bullosa.
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