Virological characteristics of the SARS-CoV-2 Omicron BA.2.75 variant

The SARS-CoV-2 Omicron BA.2.75 variant emerged in May 2022. BA.2.75 is a BA.2 descendant but is phylogenetically distinct from BA.5, the currently predominant BA.2 descendant. Here, we show that BA.2.75 has a greater effective reproduction number and different immunogenicity profile than BA.5. We de...

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Detalles Bibliográficos
Autores principales: Saito, Akatsuki, Tamura, Tomokazu, Zahradnik, Jiri, Deguchi, Sayaka, Tabata, Koshiro, Anraku, Yuki, Kimura, Izumi, Ito, Jumpei, Yamasoba, Daichi, Nasser, Hesham, Toyoda, Mako, Nagata, Kayoko, Uriu, Keiya, Kosugi, Yusuke, Fujita, Shigeru, Shofa, Maya, Monira Begum, MST, Shimizu, Ryo, Oda, Yoshitaka, Suzuki, Rigel, Ito, Hayato, Nao, Naganori, Wang, Lei, Tsuda, Masumi, Yoshimatsu, Kumiko, Kuramochi, Jin, Kita, Shunsuke, Sasaki-Tabata, Kaori, Fukuhara, Hideo, Maenaka, Katsumi, Yamamoto, Yuki, Nagamoto, Tetsuharu, Asakura, Hiroyuki, Nagashima, Mami, Sadamasu, Kenji, Yoshimura, Kazuhisa, Ueno, Takamasa, Schreiber, Gideon, Takaori-Kondo, Akifumi, Shirakawa, Kotaro, Sawa, Hirofumi, Irie, Takashi, Hashiguchi, Takao, Takayama, Kazuo, Matsuno, Keita, Tanaka, Shinya, Ikeda, Terumasa, Fukuhara, Takasuke, Sato, Kei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Author(s). Published by Elsevier Inc. 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9578327/
https://www.ncbi.nlm.nih.gov/pubmed/36272413
http://dx.doi.org/10.1016/j.chom.2022.10.003
Descripción
Sumario:The SARS-CoV-2 Omicron BA.2.75 variant emerged in May 2022. BA.2.75 is a BA.2 descendant but is phylogenetically distinct from BA.5, the currently predominant BA.2 descendant. Here, we show that BA.2.75 has a greater effective reproduction number and different immunogenicity profile than BA.5. We determined the sensitivity of BA.2.75 to vaccinee and convalescent sera as well as a panel of clinically available antiviral drugs and antibodies. Antiviral drugs largely retained potency, but antibody sensitivity varied depending on several key BA.2.75-specific substitutions. The BA.2.75 spike exhibited a profoundly higher affinity for its human receptor, ACE2. Additionally, the fusogenicity, growth efficiency in human alveolar epithelial cells, and intrinsic pathogenicity in hamsters of BA.2.75 were greater than those of BA.2. Our multilevel investigations suggest that BA.2.75 acquired virological properties independent of BA.5, and the potential risk of BA.2.75 to global health is greater than that of BA.5.

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