title: Lack of significant differences in association rates and affinities of antibodies from short-term and long-term responses to hen egg lysozyme.
abstract: The affinities (Ka) and association rate constants (kon) of 23 mouse (BALB/c) anti-lysozyme mAbs obtained after short and prolonged immunizations have been measured by plasmon resonance techniques. The affinities for the 23 Abs, measured using their Fab, range from Ka = 1.1 x 10(7) to 1.4 x 10(10) M-1. There is no significant correlation between time or dose of immunization and affinity or association rates, indicating no time- or dose-dependent maturation of the response within the doses and times that were explored. IgMs are produced early and late in the response, with intrinsic affinities <10(5) M-1. Two independently derived mAbs, D44.1 (short term) and F10.6.6 (from a longer term response), result from identical or nearly identical somatic recombination events of germline gene segments. F10.6.6 has more mutations and a higher affinity constant (Ka = 1.4 x 10(10) M-1) than D44.1 (Ka = 1.1 x 10(7) M-1). Although higher affinities may result from an accumulation of mutations, they do not correlate with the length and dose of immunogenic challenge.
authors.affiliation: Instituto de Investigaciones Bioquímicas, Fundación Campomar, and Cátedra de Immunología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina.
authors.forename: F A
authors.initials: FA
authors.lastname: Goldbaum
authors.forename: A
authors.initials: A
authors.lastname: Cauerhff
authors.forename: C A
authors.initials: CA
authors.lastname: Velikovsky
authors.forename: A S
authors.initials: AS
authors.lastname: Llera
authors.forename: M M
authors.initials: MM
authors.lastname: Riottot
authors.forename: R J
authors.initials: RJ
authors.lastname: Poljak
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D000915:Antibody Affinity; D002645:Chickens; D007140:Immunoglobulin Fab Fragments / Q000276:immunology; D007074:Immunoglobulin G / Q000276:immunology; D007075:Immunoglobulin M / Q000276:immunology; D007700:Kinetics; D051379:Mice; D008807:Mice, Inbred BALB C; D009113:Muramidase / Q000276:immunology*; D020349:Surface Plasmon Resonance; D013997:Time Factors
chemical_list: D000911:Antibodies, Monoclonal; D007140:Immunoglobulin Fab Fragments; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D009113:Muramidase