title: Detection of hepatitis C virus antibody in patients with autoimmune hepatitis and other chronic liver diseases.
abstract: To clarify the relationship between autoimmune hepatitis (AIH) and the hepatitis C virus (HCV), we investigated the prevalence of antibodies to HCV (anti-HCV) by an enzyme-linked immunosorbent assay in patients with AIH, primary biliary cirrhosis (PBC), rheumatoid arthritis and multiple myeloma. The antibody was detected in 9 out of 18 patients with AIH (50%), in 3 out of 23 with PBC (23%), in 2 out of 10 with rheumatoid arthritis (20%), and in 5 out of 9 with multiple myeloma (56%). However, the optical density values in these patients were lower than those observed in non-A, non-B hepatitis (NANBH). Anti-HCV became negative immediately after the initiation of glucocorticoid therapy in all four antibody-positive AIH patients tested. The extracted immunoglobulin G fraction from sera of 5 anti-HCV negative AIH patients became positive for the antibody. This phenomenon was not observed in 5 normal volunteer sera. The 9 family members of three anti-HCV positive AIH patients showed no anti-HCV positivity. These results suggest that autoantibodies in AIH patients may cross-react with the HCV-related antigen. Direct association of the HCV influencing the development of AIH is unlikely. Therefore, care should be taken in the evaluation of anti-HCV positivity in patients with autoimmune diseases and multiple myeloma.
authors.affiliation: Third Department of Internal Medicine, Ehime University School of Medicine, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Onji
authors.forename: T
authors.initials: T
authors.lastname: Kikuchi
authors.forename: K
authors.initials: K
authors.lastname: Michitaka
authors.forename: I
authors.initials: I
authors.lastname: Saito
authors.forename: T
authors.initials: T
authors.lastname: Miyamura
authors.forename: Y
authors.initials: Y
authors.lastname: Ohta
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000382:microbiology*; D001327:Autoimmune Diseases / Q000382:microbiology*; D003429:Cross Reactions; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D016174:Hepacivirus / Q000276:immunology / Q000302:isolation & purification*; D006505:Hepatitis / Q000382:microbiology*; D006508:Hepatitis Antibodies / Q000032:analysis*; D006801:Humans; D008105:Liver Cirrhosis, Biliary / Q000382:microbiology*; D008875:Middle Aged; D009101:Multiple Myeloma / Q000382:microbiology*
chemical_list: D006508:Hepatitis Antibodies