National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI089728
United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI110700
United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI171954
United States
Citation
Journal: PLoS Pathog / Year: 2024 Title: Discovery of Nanosota-9 as anti-Omicron nanobody therapeutic candidate. Authors: Gang Ye / Fan Bu / Divyasha Saxena / Hailey Turner-Hubbard / Morgan Herbst / Benjamin Spiller / Brian E Wadzinski / Lanying Du / Bin Liu / Jian Zheng / Fang Li / Abstract: Omicron subvariants of SARS-CoV-2 continue to pose a significant global health threat. Nanobodies, single-domain antibodies derived from camelids, are promising therapeutic tools against pandemic ...Omicron subvariants of SARS-CoV-2 continue to pose a significant global health threat. Nanobodies, single-domain antibodies derived from camelids, are promising therapeutic tools against pandemic viruses due to their favorable properties. In this study, we identified a novel nanobody, Nanosota-9, which demonstrates high potency against a wide range of Omicron subvariants both in vitro and in a mouse model. Cryo-EM data revealed that Nanosota-9 neutralizes Omicron through a unique mechanism: two Nanosota-9 molecules crosslink two receptor-binding domains (RBDs) of the trimeric Omicron spike protein, preventing the RBDs from binding to the ACE2 receptor. This mechanism explains its strong anti-Omicron potency. Additionally, the Nanosota-9 binding epitopes on the spike protein are relatively conserved among Omicron subvariants, contributing to its broad anti-Omicron spectrum. Combined with our recently developed structure-guided in vitro evolution approach for nanobodies, Nanosota-9 has the potential to serve as the foundation for a superior anti-Omicron therapeutic.
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