In vitro and in vivo application of anti-cotinine antibody and cotinine-conjugated compounds.
The combination of a high-affinity antibody to a hapten, and hapten-conjugated compounds, can provide an alternative to the direct chemical cross-linking of the antibody and compounds. An optimal hapten for in vitro use is one that is absent in biological systems. For in vivo applications, additional characteristics such as pharmacological safety and physiological inertness would be beneficial. Additionally, methods for cross-linking the hapten to various chemical compounds should be available. Cotinine, a major metabolite of nicotine, is considered advantageous in these aspects. A high-affinity anti-cotinine recombinant antibody has recently become available, and can be converted into various formats, including a bispecific antibody. The bispecific anti-cotinine antibody was successfully applied to immunoblot, enzyme immunoassay, immunoaffinity purification, and pre-targeted in vivo radioimmunoimaging. The anti-cotinine IgG molecule could be complexed with aptamers to form a novel affinity unit, and extended the in vivo half-life of aptamers, opening up the possibility of applying the same strategy to therapeutic peptides and chemical compounds.
Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul 110-799; Cancer Research Institute, Seoul National University, Seoul 110-799, Korea.
Hyori
H
Kim
Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul 110-799, Korea.
Soomin
S
Yoon
Department of Biochemistry and Molecular Biology, Seoul National University College of Medicine, Seoul 110-799; Cancer Research Institute, Seoul National University, Seoul 110-799, Korea.
Junho
J
Chung
D000818:Animals; D000906:Antibodies / Q000737:chemistry* / Q000276:immunology*; D000936:Antigen-Antibody Complex / Q000737:chemistry / Q000276:immunology; D052158:Aptamers, Peptide / Q000737:chemistry / Q000276:immunology; D003367:Cotinine / Q000737:chemistry* / Q000276:immunology*; D006241:Haptens / Q000737:chemistry* / Q000276:immunology; D006801:Humans; D018796:Immunoconjugates / Q000737:chemistry* / Q000276:immunology*; D016719:Radioimmunodetection
D000906:Antibodies; D000936:Antigen-Antibody Complex; D052158:Aptamers, Peptide; D006241:Haptens; D018796:Immunoconjugates; D003367:Cotinine