Japan Agency for Medical Research and Development (AMED)
20fk0108268
日本
Japan Agency for Medical Research and Development (AMED)
20fk018517
日本
Japan Agency for Medical Research and Development (AMED)
20fk018413
日本
Japan Science and Technology
日本
Japan Society for the Promotion of Science (JSPS)
日本
引用
ジャーナル: Commun Biol / 年: 2022 タイトル: A panel of nanobodies recognizing conserved hidden clefts of all SARS-CoV-2 spike variants including Omicron. 著者: Ryota Maeda / Junso Fujita / Yoshinobu Konishi / Yasuhiro Kazuma / Hiroyuki Yamazaki / Itsuki Anzai / Tokiko Watanabe / Keishi Yamaguchi / Kazuki Kasai / Kayoko Nagata / Yutaro Yamaoka / Kei ...著者: Ryota Maeda / Junso Fujita / Yoshinobu Konishi / Yasuhiro Kazuma / Hiroyuki Yamazaki / Itsuki Anzai / Tokiko Watanabe / Keishi Yamaguchi / Kazuki Kasai / Kayoko Nagata / Yutaro Yamaoka / Kei Miyakawa / Akihide Ryo / Kotaro Shirakawa / Kei Sato / Fumiaki Makino / Yoshiharu Matsuura / Tsuyoshi Inoue / Akihiro Imura / Keiichi Namba / Akifumi Takaori-Kondo / 要旨: We are amid the historic coronavirus infectious disease 2019 (COVID-19) pandemic. Imbalances in the accessibility of vaccines, medicines, and diagnostics among countries, regions, and populations, ...We are amid the historic coronavirus infectious disease 2019 (COVID-19) pandemic. Imbalances in the accessibility of vaccines, medicines, and diagnostics among countries, regions, and populations, and those in war crises, have been problematic. Nanobodies are small, stable, customizable, and inexpensive to produce. Herein, we present a panel of nanobodies that can detect the spike proteins of five SARS-CoV-2 variants of concern (VOCs) including Omicron. Here we show via ELISA, lateral flow, kinetic, flow cytometric, microscopy, and Western blotting assays that our nanobodies can quantify the spike variants. This panel of nanobodies broadly neutralizes viral infection caused by pseudotyped and authentic SARS-CoV-2 VOCs. Structural analyses show that the P86 clone targets epitopes that are conserved yet unclassified on the receptor-binding domain (RBD) and contacts the N-terminal domain (NTD). Human antibodies rarely access both regions; consequently, the clone buries hidden crevasses of SARS-CoV-2 spike proteins that go undetected by conventional antibodies.