Determination of the Rituximab Binding Site to the CD20 Epitope Using SPOT Synthesis and Surface Plasmon Resonance Analyses

Antibodies not only play a major role in clinical diagnostics and biopharmaceutical analysis but also are a class of drugs that are regularly used to treat numerous diseases. The identification of antibody–epitope binding sites is then of great interest to many emerging medical and bioanalytical app...

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Veröffentlicht in:Analytical chemistry (Washington) 2021-05, Vol.93 (17), p.6865-6872
Hauptverfasser: Bar, Laure, Nguyen, Christophe, Galibert, Mathieu, Santos-Schneider, Francisco, Aldrian, Gudrun, Dejeu, Jérôme, Lartia, Rémy, Coche-Guérente, Liliane, Molina, Franck, Boturyn, Didier
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container_issue 17
container_start_page 6865
container_title Analytical chemistry (Washington)
container_volume 93
creator Bar, Laure
Nguyen, Christophe
Galibert, Mathieu
Santos-Schneider, Francisco
Aldrian, Gudrun
Dejeu, Jérôme
Lartia, Rémy
Coche-Guérente, Liliane
Molina, Franck
Boturyn, Didier
description Antibodies not only play a major role in clinical diagnostics and biopharmaceutical analysis but also are a class of drugs that are regularly used to treat numerous diseases. The identification of antibody–epitope binding sites is then of great interest to many emerging medical and bioanalytical applications, particularly to design monoclonal antibodies (mAb) mimics taking advantage of amino acid residues involved in the binding. Among relevant antibodies, the monoclonal antibody rituximab has received significant attention as it is exploited to treat several cancers including non-Hodgkin’s lymphoma and chronic lymphocytic leukemia, as well as some autoimmune disorders such as rheumatoid arthritis. The binding of rituximab to the targeted cells occurs via the recognition of the CD20 epitope. A crystallographic study has shown that the binding area, named paratope, is located at the surface of rituximab. Combining the SPOT method and the complementary surface plasmon resonance technique allowed us to detect an extended recognition domain buried in the pocket of the rituximab Fab formed by four β-sheets. More generally, the present study offers a comprehensive approach to identify antibody–epitope binding sites.
doi_str_mv 10.1021/acs.analchem.1c00960
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subjects Amino acids
Analytical chemistry
Antibodies
Arthritis
Autoimmune diseases
Binding sites
Biopharmaceuticals
CD20 antigen
Chemical Sciences
Chemistry
Chemistry, Analytical
Chronic lymphocytic leukemia
Crystallography
Epitopes
Immunotherapy
Leukemia
Lymphatic leukemia
Lymphoma
Monoclonal antibodies
Non-Hodgkin's lymphoma
Physical Sciences
Recognition
Resonance
Rheumatoid arthritis
Rituximab
Science & Technology
Surface plasmon resonance
Targeted cancer therapy
title Determination of the Rituximab Binding Site to the CD20 Epitope Using SPOT Synthesis and Surface Plasmon Resonance Analyses
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