title: Demonstration of specific detection of anti-HCV IgM core antibodies.
abstract: The specificity of IgM isotype response directed against the putative core of hepatitis C virus (HCV core IgM) was demonstrated in HCV IgM EIA reactive samples. No interference was noted when samples with increasing levels of rheumatoid factor (RF) alone, or in combination with graded concentrations of anti-HCV IgG (HCV IgG), were tested. No deterioration in assay specificity was seen in 30 sera from patients wih monoclonal gammapathies (all isotypes). With Protein G affinity chromatography, RF/HCV IgG immune complexes and HCV core IgM antibodies displayed different binding characteristics, HCV core IgM appeared in the buffer eluate while HCV IgG/RF remained bound. With sucrose density gradient centrifugation HCV core IgM sedimented at 17-19S.
authors.affiliation: Abbott GmbH Diagnostika, Wiesbaden, Germany.
authors.forename: H P
authors.initials: HP
authors.lastname: Kapprell
authors.forename: G
authors.initials: G
authors.lastname: Michel
authors.forename: H
authors.initials: H
authors.lastname: Hampl
authors.forename: F
authors.initials: F
authors.lastname: Bonino
authors.forename: J I
authors.initials: JI
authors.lastname: Esteban
mesh_terms: D000956:Antigens, Viral / Q000276:immunology*; D002499:Centrifugation, Density Gradient; D002846:Chromatography, Affinity; D016174:Hepacivirus / Q000276:immunology*; D006508:Hepatitis Antibodies / Q000097:blood / Q000276:immunology*; D007124:Immunoenzyme Techniques; D007075:Immunoglobulin M / Q000097:blood / Q000276:immunology*; D012680:Sensitivity and Specificity; D014758:Viral Core Proteins / Q000276:immunology*
chemical_list: D000956:Antigens, Viral; D006508:Hepatitis Antibodies; D007075:Immunoglobulin M; D014758:Viral Core Proteins; C069130:nucleocapsid protein, Hepatitis C virus