title: IgE recognition of bullous pemphigoid (BP)180 and BP230 in BP patients and elderly individuals with pruritic dermatoses.
abstract: Bullous pemphigoid (BP) is the most common autoimmune bullous disease of the elderly and is associated with IgG and IgE autoantibodies against the hemidesmosomal proteins, BP180 and BP230. The purpose of this study was to characterize the epitope specificity of IgE against defined regions of BP180 and BP230 in 32 BP patients and 21 elderly patients with pruritic disorders who did not yet fulfill all the criteria of BP by immunoblot (IB), ELISA and indirect immunofluorescence microscopy. Our findings show that IgE from BP sera preferentially targets the COOH-terminus of BP230 (IB: 16/32, ELISA: 12/32) and, to a lesser extent, the BP180-NC16A domain (IB: 11/32, ELISA: 9/32). Noteworthy, a subgroup of elderly patients with pruritic dermatoses also showed IgE recognition of BP180-NC16A (IB: 1/21, ELISA: 4/21) and less frequently of BP230 (IB: 2/21, ELISA: 2/21). Thus, IgE recognition of the BP autoantigens is presumably an early pathogenetic event in BP.
authors.affiliation: Department of Dermatology and Allergology, Philipps University of Marburg, Marburg, Germany.
authors.forename: Luca
authors.initials: L
authors.lastname: Fania
authors.forename: Giacomo
authors.initials: G
authors.lastname: Caldarola
authors.forename: Ralf
authors.initials: R
authors.lastname: Müller
authors.forename: Oliver
authors.initials: O
authors.lastname: Brandt
authors.forename: Riccardo
authors.initials: R
authors.lastname: Pellicano
authors.forename: Claudio
authors.initials: C
authors.lastname: Feliciani
authors.forename: Michael
authors.initials: M
authors.lastname: Hertl
mesh_terms: D000368:Aged; D001323:Autoantibodies / Q000097:blood / Q000276:immunology; D001324:Autoantigens / Q000097:blood / Q000276:immunology*; D002352:Carrier Proteins; D003598:Cytoskeletal Proteins; D000071821:Dystonin; D000939:Epitopes / Q000097:blood / Q000276:immunology; D005260:Female; D006801:Humans; D006967:Hypersensitivity / Q000097:blood / Q000276:immunology; D007073:Immunoglobulin E / Q000097:blood / Q000276:immunology*; D008297:Male; D008562:Membrane Glycoproteins / Q000276:immunology*; D008875:Middle Aged; D009419:Nerve Tissue Proteins; D024041:Non-Fibrillar Collagens / Q000276:immunology*; D010391:Pemphigoid, Bullous / Q000097:blood / Q000276:immunology*; D011537:Pruritus / Q000097:blood / Q000276:immunology*; D000097805:Collagen Type XVII
chemical_list: D001323:Autoantibodies; D001324:Autoantigens; D002352:Carrier Proteins; D003598:Cytoskeletal Proteins; D000071821:Dystonin; D000939:Epitopes; D007073:Immunoglobulin E; D008562:Membrane Glycoproteins; D009419:Nerve Tissue Proteins; D024041:Non-Fibrillar Collagens; D000097805:Collagen Type XVII; C486268:DST protein, human