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Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, U.S. Gov't, P.H.S.
Rabbits immunized with a peptide encoded for by the 230-kD bullous pemphigoid antigen cDNA develop an enhanced inflammatory response to UVB irradiation: a potential animal model for bullous pemphigoid.
Journal of Investigative Dermatology 1993 July
Previous attempts to develop an animal model of bullous pemphigoid (BP) have failed to result in inflammatory disease in the skin. P1-2 is an 18-amino acid peptide encoded for by the 230-kD BP antigen cDNA that has been shown to contain an epitope recognized by circulating antibodies from patients with BP. The purpose of this study was to determine if ultraviolet B irradiation of rabbits after immunization with the P1-2 peptide would result in an enhanced inflammatory response in the skin to that injury. Three rabbits were immunized with either P1-2 or a control peptide. All rabbits immunized with P1-2, and none of the control rabbits, developed antibodies against P1-2 that bound in vitro to both human and rabbit skin in a linear pattern at the basement membrane zone. Immunized rabbits were irradiated on the flank with ultraviolet light. Rabbits immunized with P1-2 developed an enhanced inflammatory reaction to ultraviolet B irradiation leading to epidermal necrosis and sloughing of some sites in 6-9 d. Control rabbits showed only mild erythema without sloughing, which healed in 4-6 d. Histology in the P1-2 immunized rabbits at 24 h revealed an inflammatory infiltrate of neutrophils at the dermal-epidermal junction, whereas control rabbits showed only mild edema and a sparse inflammatory infiltrate. All the rabbits immunized with P1-2 had linear deposits of immunoglobulin G and C3 at the basement membrane zone of healed skin compared to none of the controls. These findings demonstrate that antibodies against a synthetic peptide encoded by the BP antigen 1 sequence can lead to an enhanced inflammatory response after epithelial injury in rabbit skin.
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