Download MendeleyVirological characteristics of the SARS-CoV-2 Omicron BA.2.75 variant.
Saito, A., Tamura, T., Zahradnik, J., Deguchi, S., Tabata, K., Anraku, Y., Kimura, I., Ito, J., Yamasoba, D., Nasser, H., Toyoda, M., Nagata, K., Uriu, K., Kosugi, Y., Fujita, S., Shofa, M., Monira Begum, M., Shimizu, R., Oda, Y., Suzuki, R., Ito, H., Nao, N., Wang, L., Tsuda, M., Yoshimatsu, K., Kuramochi, J., Kita, S., Sasaki-Tabata, K., Fukuhara, H., Maenaka, K., Yamamoto, Y., Nagamoto, T., Asakura, H., Nagashima, M., Sadamasu, K., Yoshimura, K., Ueno, T., Schreiber, G., Takaori-Kondo, A., Shirakawa, K., Sawa, H., Irie, T., Hashiguchi, T., Takayama, K., Matsuno, K., Tanaka, S., Ikeda, T., Fukuhara, T., Sato, K.(2022) Cell Host Microbe 30: 1540-1555.e15
- PubMed: 36272413
- DOI: https://doi.org/10.1016/j.chom.2022.10.003
- Primary Citation of Related Structures:
8GS6 - PubMed Abstract:
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.
Organizational Affiliation:
Department of Veterinary Science, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan; Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, Miyazaki, Japan; Center for Animal Disease Control, University of Miyazaki, Miyazaki, Japan.
