title: Selective suppression of IgG2a subclass in LEC rats during development.
abstract: The LEC rat is a mutant strain that has been established as a model of hepatitis and hepatoma. In addition to hepatic disorders, it has been found that this strain has a defect in T cell maturation, and has low levels of serum IgG. Sodium dodecylsulfate polyacrylamide gel electrophoresis (SDS-PAGE) and immunoblot analysis showed that low levels of serum IgG were largely due to reduction of the IgG2a subclass. Quantitative determination of IgG subclasses by enzyme-linked immunosorbent assay (ELISA) using subclass-specific antibodies indicated that IgG2b and IgG2c subclasses were increased during development in this strain, whereas the IgG2a subclass was markedly decreased. These results suggest that dysfunction of some helper T cells in LEC rats selectively suppress synthesis of the IgG2a subclass during development but not affect production of IgG2b and IgG2c.
authors.affiliation: Department of Biochemistry, Osaka University Medical School, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Ikeda
authors.forename: T
authors.initials: T
authors.lastname: Sugiyama
authors.forename: M
authors.initials: M
authors.lastname: Takahashi
authors.forename: N
authors.initials: N
authors.lastname: Taniguchi
mesh_terms: D000818:Animals; D015153:Blotting, Western; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay; D017099:IgG Deficiency / Q000097:blood* / Q000276:immunology; D007074:Immunoglobulin G / Q000097:blood*; D051381:Rats; D011922:Rats, Mutant Strains; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D007074:Immunoglobulin G