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Relationship between the in vivo localization and the immunoblotting pattern of anti-basement membrane zone antibodies in patients with bullous pemphigoid. 1997

P Joly, and D Gilbert, and E Thomine, and A Delpech, and P Courville, and P Young, and C Le Corvaisier, and P Lauret, and F Tron
Dermatology Clinic, Hôpital Charles-Nicolle, Rouen, France.

OBJECTIVE To compare the localization of anti-basement membrane zone (BMZ) antibodies bound in vivo with the antigenic specificities of circulating anti-BMZ antibodies in patients with bullous pemphigoid (BP). METHODS Comparison of the results of an examination of the skin specimens of the patients using direct immunoelectron microscopy and direct immunofluorescence on 1-mol/L sodium chloride-split skin with the results of an analysis of the corresponding serum samples using the immunoblot technique. METHODS Immunodermatology department in a teaching hospital. METHODS Thirty-six patients with typical BP and circulating anti-BMZ antibodies. RESULTS Serum samples from 22 patients with BP indicated only BP antigen 1 in the results of immunoblot analysis. Using direct immunofluorescence, an analysis of the peribullous skin samples obtained from these 22 patients showed deposits of IgG exclusively located along the epidermal side of sodium chloride-split skin; the results of direct immunoelectron microscopic examination showed deposits of IgG located on the intracellular portion of hemidesmosomes in 18 (82%) of these 22 specimens, whereas 4 biopsy specimens had linear IgG deposits located both intracellularly and extracellularly along the keratinocyte plasma membrane. The results of immunoblot analysis of the serum samples from 5 patients with BP indicated BP antigen 2 alone; the results of direct immunoelectron microscopic examination of peribullous skin samples from these 5 patients showed linear intracellular and extracellular deposits along the keratinocyte membrane, corresponding to an epidermal fluorescence labeling pattern of peribullous sodium chloride-split skin in 2 patients and a combined (dermal and epidermal) pattern in 3 patients. CONCLUSIONS The 2 different patterns of reactivity of anti-BMZ antibody deposits bound in vivo closely corresponded to the antigenic specificities indicated in the corresponding serum samples of the patients. These results are in accordance with those previously obtained in vitro and argue for identical binding profiles of circulating antibodies that are bound in vivo in BP.

UI MeSH Term Description Entries
D010391 Pemphigoid, Bullous A chronic and relatively benign subepidermal blistering disease usually of the elderly and without histopathologic acantholysis. Pemphigoid,Bullous Pemphigoid,Pemphigoids
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001323 Autoantibodies Antibodies that react with self-antigens (AUTOANTIGENS) of the organism that produced them. Autoantibody
D001485 Basement Membrane A darkly stained mat-like EXTRACELLULAR MATRIX (ECM) that separates cell layers, such as EPITHELIUM from ENDOTHELIUM or a layer of CONNECTIVE TISSUE. The ECM layer that supports an overlying EPITHELIUM or ENDOTHELIUM is called basal lamina. Basement membrane (BM) can be formed by the fusion of either two adjacent basal laminae or a basal lamina with an adjacent reticular lamina of connective tissue. BM, composed mainly of TYPE IV COLLAGEN; glycoprotein LAMININ; and PROTEOGLYCAN, provides barriers as well as channels between interacting cell layers. Basal Lamina,Basement Lamina,Lamina Densa,Lamina Lucida,Lamina Reticularis,Basement Membranes,Densas, Lamina,Lamina, Basal,Lamina, Basement,Lucida, Lamina,Membrane, Basement,Membranes, Basement,Reticularis, Lamina
D015151 Immunoblotting Immunologic method used for detecting or quantifying immunoreactive substances. The substance is identified by first immobilizing it by blotting onto a membrane and then tagging it with labeled antibodies. Dot Immunoblotting,Electroimmunoblotting,Immunoelectroblotting,Reverse Immunoblotting,Immunoblotting, Dot,Immunoblotting, Reverse,Dot Immunoblottings,Electroimmunoblottings,Immunoblottings,Immunoblottings, Dot,Immunoblottings, Reverse,Immunoelectroblottings,Reverse Immunoblottings

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