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  • Title: Specific affinity between fibronectin and the epidermolysis bullosa acquisita antigen.
    Author: Woodley DT, O'Keefe EJ, McDonald JA, Reese MJ, Briggaman RA, Gammon WR.
    Journal: J Clin Invest; 1987 Jun; 79(6):1826-30. PubMed ID: 3584471.
    Abstract:
    Autoantibodies in the skin and sera of patients with epidermolysis bullosa acquisita bind to a large matrix molecule within the lamina densa region of skin basement membrane. At the site of these immune complexes, the epidermis separates from the dermis, which creates a subepidermal blister just below the lamina densa. The target molecule for the autoantibodies is in close apposition to fibronectin, a major extracellular matrix molecule that is abundant in the upper dermis of skin. In this report, we show specific affinity between fibronectin and the 290,000-D chain of the epidermolysis bullosa acquisita antigen, and that this affinity is mediated by the gelatin/collagen-binding domain of fibronectin (Mr = 60,000). Since blistering in epidermolysis bullosa acquisita often occurs in the absence of clinical and histological inflammation, a direct interruption in the fibronectin-epidermolysis bullosa acquisita antigen bond may be involved in the pathogenesis of epidermal-dermal disadherence that occurs in this bullous disease.
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