title: IgA-mediated anti-glomerular basement membrane disease: an uncommon mechanism of Goodpasture's syndrome.
abstract: Goodpasture's (GP) disease is usually mediated by IgG autoantibodies. We describe a case of IgA-mediated GP, in a patient presenting with isolated rapidly progressive glomerulonephritis. The diagnosis was established on kidney biopsy, since routine enzyme-linked immunosorbent assay (ELISA) targeted at IgG circulating autoantibodies failed to detect the nephritogenic antibodies. Immunofluorescence microscopy showed intense linear deposition of IgA along the glomerular capillary walls. An elevated titre (1:80) of circulating IgA anti-glomerular basement membrane (GBM) antibodies was retrospectively demonstrated by indirect fluorescence. Despite immunosuppressive regimen, the disease progressed to end-stage renal failure (ESRF). Transplantation was not associated with recurrence in the kidney graft. We reviewed the 11 previously reported cases of IgA-mediated GP.
authors.affiliation: Néphrologie et Immunologie Clinique , CHU Rangueil , Toulouse , France ; Université de Toulouse , Toulouse , France ; Centre de Référence des Maladies Rénales Rares, Toulouse , France.
authors.forename: Guillaume
authors.initials: G
authors.lastname: Moulis
authors.affiliation: Néphrologie et Immunologie Clinique , CHU Rangueil , Toulouse , France ; Université de Toulouse , Toulouse , France ; Centre de Référence des Maladies Rénales Rares, Toulouse , France ; INSERM U 1048 (I2MR, Equipe 12) , Toulouse , France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Huart
authors.affiliation: Néphrologie et Immunologie Clinique , CHU Rangueil , Toulouse , France ; Université de Toulouse , Toulouse , France ; Centre de Référence des Maladies Rénales Rares, Toulouse , France.
authors.forename: Joëlle
authors.initials: J
authors.lastname: Guitard
authors.affiliation: Université de Toulouse , Toulouse , France ; Laboratoire d'Immunologie , CHU Rangueil , Toulouse , France.
authors.forename: Françoise
authors.initials: F
authors.lastname: Fortenfant
authors.affiliation: Néphrologie et Immunologie Clinique , CHU Rangueil , Toulouse , France ; Université de Toulouse , Toulouse , France ; Centre de Référence des Maladies Rénales Rares, Toulouse , France ; INSERM U 1048 (I2MR, Equipe 12) , Toulouse , France.
authors.forename: Dominique
authors.initials: D
authors.lastname: Chauveau
keywords: Goodpasture's disease; IgA; anti-glomerular basement membrane disease