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Anti-CfaE nanobodies provide broad cross-protection against major pathogenic enterotoxigenic Escherichia coli strains, with implications for vaccine design

Sci Rep. 2021-02; 
Alla Amcheslavsky, Aaron L Wallace, Monir Ejemel, Qi Li, Conor T McMahon, Matteo Stoppato, Serena Giuntini, Zachary A Schiller, Jessica R Pondish, Jacqueline R Toomey, Ryan M Schneider, Jordan Meisinger, Raimond Heukers, Andrew C Kruse, Eileen M Barry, Brian G Pierce, Mark S Klempner, Lisa A Cavacini, Yang Wang
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Mutant Libraries … Alanine mutants of CfaE residues were cloned individually by Genscript into pMAL-C5x vector, and the resulting constructs were transformed, expressed, and purified as described above. ELISA was performed to determine the binding of the nanobodies to the mutant proteins in … Get A Quote

摘要

Enterotoxigenic Escherichia coli (ETEC) is estimated to cause approximately 380,000 deaths annually during sporadic or epidemic outbreaks worldwide. Development of vaccines against ETEC is very challenging due to the vast heterogeneity of the ETEC strains. An effective vaccines would have to be multicomponent to provide coverage of over ten ETEC strains with genetic variabilities. There is currently no vaccine licensed to prevent ETEC. Nanobodies are successful new biologics in treating mucosal infectious disease as they recognize conserved epitopes on hypervariable pathogens. Cocktails consisting of multiple nanobodies could provide even broader epitope coverage at a lower cost compared to monoclonal antibodie... More

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