通过使用非中和抗体构建的双特异性抗体克服抗体耐药的SARS-CoV-2变体
Tetsuya Inoue1, Yuichiro Yamamoto1, Kaoru Sato1
1Laboratory of Molecular Targeted Therapy, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Yamazaki 2641, Noda, Chiba 278-8510, Japan.
iScience
|March 19, 2024
概括
新的双特异性抗体可以克服SARS-CoV-2变种的免疫逃避. 将现有的抗体与抗S2抗体结合起来,可以恢复对抗BQ.1.1.1.1.等耐药变体的治疗效果.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 生物技术是生物技术.
背景情况:
- SARS-CoV-2 变种的出现 (例如,BQ.1.1,XBB.1.5) 是由于免疫逃避而带来的挑战,降低了抗体药物疗效.
- 现有的紧急使用抗体治疗药物,如贝贝洛维马布,对这些不断发展的变体变得越来越无效.
研究的目的:
- 设计新的中和双特异性抗体,以对抗逃避免疫防御的SARS-CoV-2变种.
- 恢复免疫逃避SARS-CoV-2菌株受损抗体治疗药物的有效性.
主要方法:
- 在IgG-scFv格式中使用最初非中和抗体CvMab-6 (抗受体结合域[RBD]) 和CvMab-62 (抗S2子单元) 编制双特异性抗体.
- 结合了bebtelovimab的scFv与抗S2抗体,以创建一个新的双特异性抗体.
主要成果:
- 成功设计了能够向不同的SARS-CoV-2表位体的中和双特异抗体.
- 使用工程双特异性抗体,对抗抗贝贝洛维马布耐药的BQ.1.1变体显著恢复治疗效果.
结论:
- 中和双特异性抗体结合抗RBD和抗S2向提供了一个有希望的策略来恢复抗体疗法.
- 这种方法可以克服SARS-CoV-2变种的免疫逃避,并保持治疗疗效.
相关概念视频
Cross-reactivity
31.1K
Overview
31.1K
Antibody Actions
1.1K
Antibodies, or immunoglobulins, are critical players in the immune system's arsenal against invading pathogens. Produced by B cells and plasma cells, their primary role is to detect and bind to specific antigens, molecules found on the surface of pathogens like bacteria or viruses. Beyond antigen recognition, antibodies perform several vital functions that contribute to immune defense.
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
1.1K
Hybridoma Technology
14.7K
Hybridoma technology is used for the large-scale production of monoclonal antibodies. Monoclonal antibodies bind to only a single antigenic determinant or epitope. Such antibodies are used in research, diagnostics, and disease therapy. The hybridoma technology established in 1975 by Georges Köhler and Cesar Milstein was awarded the Nobel Prize in Medicine in 1984 for revolutionizing research and therapy.
Hybridoma Selection
Commonly used fusion techniques — electroporation,...
Hybridoma Selection
Commonly used fusion techniques — electroporation,...
14.7K


