Single Tri-Epitopic Antibodies (TeAbs) to Botulinum Neurotoxin Serotypes B, E, and F Recapitulate the Full Potency of a Combination of Three Monoclonal Antibodies in Toxin Neutralization.

ABSTRACT: Recombinant monoclonal antibody (mAb) botulinum neurotoxin (BoNT) antitoxins, consisting of three mAbs that bind non-overlapping epitopes, are highly potent. However, the three-mAb mixtures pose unique development and manufacturing challenges. Combining even more mAbs to create multivalent antitoxin drugs multiplies those challenges. We previously reported that a single tri-epitopic IgG1-based mAb (TeAb) containing the variable domains of the three parental BoNT/A mAbs and an Fc was as potent as the combination of three IgGs in the mouse neutralization assay (MNA). Here, we extended the tri-epitopic strategy to three other BoNT serotypes. Each TeAb (TeAb-B for BoNT/B, TeAb-E for BoNT/E, and TeAb-F for BoNT/F) binding was measured using fluorescence-activated cell sorting and flow fluorimet

SUBMITTER: Lou J 

PROVIDER: S-EPMC12197607 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature