Japan Agency for Medical Research and Development (AMED)
JP21am0101093
日本
Japan Agency for Medical Research and Development (AMED)
JP22ama121037
日本
Japan Science and Technology
JPMJCR20H8
日本
Japan Society for the Promotion of Science (JSPS)
JPJSCCA20190008
日本
Japan Society for the Promotion of Science (JSPS)
20H05773
日本
Japan Society for the Promotion of Science (JSPS)
JP20H05873
日本
引用
ジャーナル: Nat Commun / 年: 2024 タイトル: Virological characteristics of the SARS-CoV-2 Omicron XBB.1.5 variant. 著者: Tomokazu Tamura / Takashi Irie / Sayaka Deguchi / Hisano Yajima / Masumi Tsuda / Hesham Nasser / Keita Mizuma / Arnon Plianchaisuk / Saori Suzuki / Keiya Uriu / Mst Monira Begum / Ryo Shimizu ...著者: Tomokazu Tamura / Takashi Irie / Sayaka Deguchi / Hisano Yajima / Masumi Tsuda / Hesham Nasser / Keita Mizuma / Arnon Plianchaisuk / Saori Suzuki / Keiya Uriu / Mst Monira Begum / Ryo Shimizu / Michael Jonathan / Rigel Suzuki / Takashi Kondo / Hayato Ito / Akifumi Kamiyama / Kumiko Yoshimatsu / Maya Shofa / Rina Hashimoto / Yuki Anraku / Kanako Terakado Kimura / Shunsuke Kita / Jiei Sasaki / Kaori Sasaki-Tabata / Katsumi Maenaka / Naganori Nao / Lei Wang / Yoshitaka Oda / / Terumasa Ikeda / Akatsuki Saito / Keita Matsuno / Jumpei Ito / Shinya Tanaka / Kei Sato / Takao Hashiguchi / Kazuo Takayama / Takasuke Fukuhara / 要旨: Circulation of SARS-CoV-2 Omicron XBB has resulted in the emergence of XBB.1.5, a new Variant of Interest. Our phylogenetic analysis suggests that XBB.1.5 evolved from XBB.1 by acquiring the S486P ...Circulation of SARS-CoV-2 Omicron XBB has resulted in the emergence of XBB.1.5, a new Variant of Interest. Our phylogenetic analysis suggests that XBB.1.5 evolved from XBB.1 by acquiring the S486P spike (S) mutation, subsequent to the acquisition of a nonsense mutation in ORF8. Neutralization assays showed similar abilities of immune escape between XBB.1.5 and XBB.1. We determine the structural basis for the interaction between human ACE2 and the S protein of XBB.1.5, showing similar overall structures between the S proteins of XBB.1 and XBB.1.5. We provide the intrinsic pathogenicity of XBB.1 and XBB.1.5 in hamsters. Importantly, we find that the ORF8 nonsense mutation of XBB.1.5 resulted in impairment of MHC suppression. In vivo experiments using recombinant viruses reveal that the XBB.1.5 mutations are involved with reduced virulence of XBB.1.5. Together, our study identifies the two viral functions defined the difference between XBB.1 and XBB.1.5.