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- W1993803325 abstract "Abstract Monoclonal antibody (mAb) 38C2 belongs to a group of catalytic antibodies that were generated by reactive immunization and contains a reactive lysine. 38C2 catalyzes aldol and retro‐aldol reactions, using an enamine mechanism, and mechanistically mimics natural aldolase enzymes. In addition, mAb 38C2 can be redirected to target integrins α v β 3 and α v β 5 through the formation of a covalent bond between a β‐diketone derivative of an arginine–glycine–aspartic acid (RGD) peptidomimetic and the reactive lysine residue in the antibody combining site to provide the chemically programmed mAb cp38C2. In this study, we investigated the potential of enhancing the activity of receptor‐binding small molecule drug (SCS‐873) through antibody conjugation. Using a M21 human melanoma xenograft model in nude mice, cp38C2 inhibited the growth of the tumor by ˜81%. The chemically programmed antibody was shown to be highly active at a low concentration while SCS‐873 alone was ineffective even at dosages ˜1,000‐fold higher than those used for the chemically programmed antibody. In vitro programming of the catalytic antibody was shown to be as effective as in vivo programming. In an experimental metastasis assay, treatment with mAb cp38C2 significantly prolonged overall survival of tumor‐bearing severe combined immuno‐deficient (SCID) mice when compared to treatment with unprogrammed mAb 38C2, SCS‐873 alone or the integrin‐specific monoclonal antibody LM609. In vitro, cp38C2 inhibited human and mouse endothelial and human melanoma cell adhesion, migration and invasion. Additionally, cp38C2 inhibited human and mouse endothelial cell proliferation and was active in complement‐dependent cytotoxicity assays. These studies establish the potential of chemically programmed monoclonal antibodies as a novel and effective class of immunotherapeutics that combine the merits of traditional small molecule drug design with immunotherapy. © 2006 Wiley‐Liss, Inc." @default.
- W1993803325 created "2016-06-24" @default.
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- W1993803325 date "2006-06-05" @default.
- W1993803325 modified "2023-10-18" @default.
- W1993803325 title "Small molecule drug activity in melanoma models may be dramatically enhanced with an antibody effector" @default.
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- W1993803325 doi "https://doi.org/10.1002/ijc.21924" @default.
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