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Publications

Journal Article Research Support, Non-U.S. Gov't Epublish 1 citation

PubMed: 39500906 DOI: 10.1038/s41392-024-02007-8

A protein vaccine of RBD integrated with immune evasion mutation shows broad protection against SARS-CoV-2.

Signal Transduct Target Ther 9(1):301

Authors: Ran An, Hao Yang, Cong Tang, Qianqian Li, Qing Huang, Haixuan Wang, Junbin Wang, Yanan Zhou, Yun Yang, Hongyu Chen, Wenhai Yu, Bai Li, Daoju Wu, Yong Zhang, Fangyu Luo, Wenqi Quan, Jingwen Xu, Dongdong Lin, Xiaoming Liang, Yuhuan Yan, Longhai Yuan, Xuena Du, Yuxia Yuan, Yanwen Li, Qiangming Sun, Youchun Wang, Shuaiyao Lu

Affiliations

  • Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.
  • Key Laboratory of Pathogen Infection Prevention and Control (Peking Union Medical College), Ministry of Education, Beijing, China.
  • State Key Laboratory of Respiratory Health and Multimorbidity, Beijing, China.
  • Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.
  • Key Laboratory of Pathogen Infection Prevention and Control (Peking Union Medical College), Ministry of Education, Beijing, China.
  • State Key Laboratory of Respiratory Health and Multimorbidity, Beijing, China.
  • Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Kunming, China.
  • Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.
  • Key Laboratory of Pathogen Infection Prevention and Control (Peking Union Medical College), Ministry of Education, Beijing, China.
  • State Key Laboratory of Respiratory Health and Multimorbidity, Beijing, China.
  • Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.
  • Key Laboratory of Pathogen Infection Prevention and Control (Peking Union Medical College), Ministry of Education, Beijing, China.
  • State Key Laboratory of Respiratory Health and Multimorbidity, Beijing, China.
  • Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Kunming, China.

Abstract

Variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) continue to emerge and evade immunity, resulting in breakthrough infections in vaccinated populations. There is an urgent need for the development of vaccines with broad protective effects. In this study, we selected hotspot mutations in the receptor-binding domain (RBD) that contribute to immune escape properties and integrated them into the original RBD protein to obtain a complex RBD protein (cRBD), and we found cRBDs have broad protective effects against SARS-CoV-2 variants. Three cRBDs were designed in our study. Compared with the BA.1 RBD protein, the cRBDs induced the production of higher levels of broader-spectrum neutralizing antibodies, suggesting stronger and broader protective efficacy. In viral challenge experiments, cRBDs were more effective than BA.1 RBD in attenuating lung pathologic injury. Among the three constructs, cRBD3 showed optimal broad-spectrum and protective effects and is a promising candidate for a broad-spectrum SARS-CoV-2 vaccine. In conclusion, immunization with cRBDs triggered immunity against a wide range of variants, including those that emerged after we had completed designing the cRBDs. This study preliminarily explores and validates the feasibility of incorporating hotspot mutations that contribute to immune evasion into the RBD to expand the activity spectrum of antigen-induced antibodies.

MeSH

Sars-Cov-2, Staphylococcal Protein A, Vaccines, Antibodies, Signal Transduction, Immunity, Severe Acute Respiratory Syndrome-Related Coronavirus, Mutation, Immune Evasion

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