title: Estimation of IgG subclasses of anti-HCV (C100-3) in non-A, non-B fulminant, acute and chronic hepatitis and it's significance.
abstract: To determine whether identification of subclasses of anti-HCV IgG would help distinguish between acute and fulminant hepatitis, we assayed serum IgG subclasses of anti-HCV (C100-3) in non-A, non-B hepatitis. Anti-HCV IgG was restricted to two subclasses in different diagnostic conditions; anti-HCV IgG1 and anti-HCV IgG3. Anti-HCV IgG1 was the main subclass in acute hepatitis (AH), and was positive in all the cases and only one case was positive for anti-HCV IgG3. Anti-HCV IgG3 was the dominant subclass in fulminant hepatitis (FH). Out of the total 12 cases of FH, who were positive for either anti-HCV IgG or for any of it's subclasses, in 10 cases (83%), anti-HCV IgG3 had higher optical density (OD) values than anti-HCV IgG1 and in 6 cases (50%) was the only subclass of anti-HCV IgG being positive. In 5 cases with FH, anti-HCV IgG3 became positive even when anti-HCV IgG was negative. These findings from the basis of a new observation and are likely to be helpful in the diagnosis of non-A, non-B fulminant hepatitis.
authors.affiliation: Third Department of Internal Medicine, Ehime University School of Medicine, Japan.
authors.forename: S M
authors.initials: SM
authors.lastname: Akbar
authors.forename: M
authors.initials: M
authors.lastname: Onji
authors.forename: Y
authors.initials: Y
authors.lastname: Ohta
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D002908:Chronic Disease; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D016174:Hepacivirus / Q000276:immunology*; D006526:Hepatitis C / Q000276:immunology*; D006521:Hepatitis, Chronic / Q000276:immunology*; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis*; D008297:Male; D008875:Middle Aged
chemical_list: D007074:Immunoglobulin G