Download MendeleyBroad neutralization of SARS-CoV-2 variants by an inhalable bispecific single-domain antibody.
Li, C., Zhan, W., Yang, Z., Tu, C., Hu, G., Zhang, X., Song, W., Du, S., Zhu, Y., Huang, K., Kong, Y., Zhang, M., Mao, Q., Gu, X., Zhang, Y., Xie, Y., Deng, Q., Song, Y., Chen, Z., Lu, L., Jiang, S., Wu, Y., Sun, L., Ying, T.(2022) Cell 185: 1389-1401.e18
- PubMed: 35344711
- DOI: https://doi.org/10.1016/j.cell.2022.03.009
- Primary Citation of Related Structures:
7WHI, 7WHJ, 7WHK - PubMed Abstract:
The effectiveness of SARS-CoV-2 vaccines and therapeutic antibodies have been limited by the continuous emergence of viral variants and by the restricted diffusion of antibodies from circulation into the sites of respiratory virus infection. Here, we report the identification of two highly conserved regions on the Omicron variant receptor-binding domain recognized by broadly neutralizing antibodies. Furthermore, we generated a bispecific single-domain antibody that was able to simultaneously and synergistically bind these two regions on a single Omicron variant receptor-binding domain as revealed by cryo-EM structures. We demonstrated that this bispecific antibody can be effectively delivered to lung via inhalation administration and exhibits exquisite neutralization breadth and therapeutic efficacy in mouse models of SARS-CoV-2 infections. Importantly, this study also deciphered an uncommon and highly conserved cryptic epitope within the spike trimeric interface that may have implications for the design of broadly protective SARS-CoV-2 vaccines and therapeutics.
Organizational Affiliation:
MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology, Shanghai Institute of Infectious Disease and Biosecurity, The Fifth People's Hospital of Shanghai, Institutes of Biomedical Sciences, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China.
