title: Pathogenic significance of interleukin-6 in a patient with antiglomerular basement membrane antibody-induced glomerulonephritis with multinucleated giant cells.
abstract: We report a patient with anti-glomerular basement membrane disease who developed renal failure associated with systemic manifestations, including acute-phase inflammatory reactions and plasmacytosis. Renal tissue obtained by an open surgical biopsy showed circumferential cellular crescents, multinucleated giant cells, and exudation of fibrin in all glomeruli. Immunofluorescence microscopy demonstrated deposition of immunoglobulin G, C3, and membrane attack complex along glomerular capillary walls. Multinucleated giant cells were suggested to be macrophage-monocyte lineage because they were CD68 positive. Bone marrow aspiration showed an increase of plasma cells. Immunostaining showed intensive expression of interleukin-6 (IL-6) in practically every part of the renal sites involving multinucleated cells, crescents, tubules, and infiltrating cells, suggesting that one of the sources of systemically elevated IL-6 was the kidney. Serum IL-6, anti-glomerular basement membrane antibody, and acute-phase proteins were markedly elevated, and returned dramatically to the normal level after corticosteroid therapy and plasmapheresis. We believe that IL-6 played an important role in the development of many symptoms in the present case.
authors.affiliation: Department of Internal Medicine, Chubu Rousai Hospital, Nagoya, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Ito
authors.forename: A
authors.initials: A
authors.lastname: Fukatsu
authors.forename: M
authors.initials: M
authors.lastname: Baba
authors.forename: M
authors.initials: M
authors.lastname: Mizuno
authors.forename: S
authors.initials: S
authors.lastname: Ichida
authors.forename: Y
authors.initials: Y
authors.lastname: Sado
authors.forename: S
authors.initials: S
authors.lastname: Matsuo
mesh_terms: D000368:Aged; D000906:Antibodies / Q000276:immunology* / Q000378:metabolism; D001323:Autoantibodies; D001485:Basement Membrane / Q000276:immunology; D001853:Bone Marrow / Q000473:pathology; D003176:Complement C3 / Q000378:metabolism; D015938:Complement Membrane Attack Complex / Q000378:metabolism; D005260:Female; D005455:Fluorescent Antibody Technique; D015726:Giant Cells / Q000473:pathology*; D005921:Glomerulonephritis / Q000276:immunology* / Q000378:metabolism / Q000473:pathology; D006801:Humans; D007074:Immunoglobulin G / Q000378:metabolism; D015850:Interleukin-6 / Q000378:metabolism / Q000502:physiology*; D007678:Kidney Glomerulus / Q000276:immunology* / Q000473:pathology; D010950:Plasma Cells / Q000473:pathology
chemical_list: D000906:Antibodies; D001323:Autoantibodies; D003176:Complement C3; D015938:Complement Membrane Attack Complex; D007074:Immunoglobulin G; D015850:Interleukin-6; C051951:antiglomerular basement membrane antibody