title: Isolation characterization and idiotype of Lewis rat antibodies against peptide 68-88 of guinea pig myelin basic protein.
abstract: Antibodies against the 19 amino acid encephalitogenic peptide )residues 68-88) of guinea pig myelin basic protein (GPBP) were raised in Lewis (Le) rats. Anti-peptide antibodies were isolated from immune ascitic fluids by affinity chromatography using peptide 43-88-Sepharose 4B. The purified antibodies were characterized by sodium dodecyl sulphate-polyacrylamide gel electrophoresis and isoelectric focusing. Immunoglobulin class was determined by radioimmunoassay. Anti-idiotypic (anti-ID) antibodies were raised in a rabbit using purified anti-peptide antibodies from a single rat. The results of these experiments showed antibody heterogeneity both within an individual anti-peptide antiserum and between antisera from different rats. Antibody activity was found in IgG1, IgG2, and IgE immunoglobulin classes. Isoelectric focusing revealed multiple bands within a population of purified antibodies with significant pattern variation from one antiserum to another. Idiotypic characterization showed various levels of cross-reactive idiotypes present in some sera while these were absent in others.
mesh_terms: D000818:Animals; D000888:Antibodies, Anti-Idiotypic / Q000276:immunology; D002846:Chromatography, Affinity; D003429:Cross Reactions; D005260:Female; D006168:Guinea Pigs; D007073:Immunoglobulin E / Q000276:immunology; D007074:Immunoglobulin G / Q000276:immunology; D007130:Immunoglobulin Idiotypes / Q000276:immunology* / Q000302:isolation & purification; D007525:Isoelectric Focusing; D004676:Myelin Basic Protein / Q000276:immunology*; D010446:Peptide Fragments / Q000276:immunology*; D051381:Rats; D011917:Rats, Inbred Lew
chemical_list: D000888:Antibodies, Anti-Idiotypic; D007074:Immunoglobulin G; D007130:Immunoglobulin Idiotypes; D004676:Myelin Basic Protein; D010446:Peptide Fragments; D007073:Immunoglobulin E