Biosensor analysis of antigen-antibody interactions as a priority step in the generation of monoclonal bispecific antibodies

Alberto Horenstein, Claudio Poiesi, Maria Camagna, Lucia De Monte, Massimo Mariani, Alberto Albertini, Fabio Malavasi

Research output: Contribution to journalArticlepeer-review

Abstract

A biosensor system aimed at real-time measuring molecular interactions among label-free reactants has been used for a comparative analysis of the binding features (i.e., association-dissociation rates and affinity constants) as well as epitope mapping between bivalent monoclonal antibodies and the derived monovalent bispecific monoclonal antibody. The results show that observed different affinities between parental and derived bispecific antibodies concern the association rate constant, whereas the dissociation rate constants are unaltered. The apparent affinity-constant values determined by solid-phase radioimmunoassay yielded figures almost overlapping with those obtained with the biosensor instrument. The results of the present work indicate that the biosensor system has gained a key role not only as a tool for the study of antigen-antibody interactions, but also for setting up the reference parameters for the selection of the best candidates in the generation of bispecific monoclonal antibodies.

Original languageEnglish
Pages (from-to)109-117
Number of pages9
JournalCell Biophysics
Volume24-25
Issue number1-3
DOIs
Publication statusPublished - Jan 1994

Keywords

  • affinity constant
  • Bispecific monoclonal antibody
  • real-time kinetics
  • tumor targeting

ASJC Scopus subject areas

  • Cell Biology
  • Biophysics

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