广泛中和SARS-CoV-2抗体的功能和结构调查
Yi-Hsuan Chang1,2, Min-Feng Hsu3, Wei-Nan Chen1
1Genomics Research Center, Academia Sinica, Taipei, Taiwan.
JCI insight
|May 22, 2024
概括
一种新的抗体O5C2可以中和SARS-CoV-2变种,如Omicron EG.5.1,并通过向一个大的尖端蛋白区域来保护感染,为广泛的COVID-19保护提供了希望.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 结构生物学 结构生物学
背景情况:
- 随着SARS-CoV-2的演变,需要针对COVID-19进行广泛的保护性治疗.
- 单克隆抗体 (mAbs) 为严重的COVID-19提供了治疗策略.
- 由于正在进行的病毒突变,开发泛保护性mAbs至关重要.
研究的目的:
- 确定针对SARS-CoV-2变种的广泛中和的单克隆抗体 (mAbs).
- 描述新型 mAbs. 的保护机制.
- 了解抗体相互作用与不断演变的尖端蛋白质表观.
主要方法:
- 从使用单B细胞查的Omicron亚变体突破性感染的捐赠者中分离mAbs.
- 对抗SARS-CoV-2变种的中和和抗体依赖细胞介导细胞毒性 (ADCC) 的评估.
- 电子显微镜 (cryo-EM) 用于对mAb-表皮质相互作用的结构分析.
- 在小鼠模型和转录基因分析中的体内疗效研究.
主要成果:
- 鉴定出一种新的mAb,O5C2,具有广泛的中和和ADCC活性,对抗包括EG.5.1.1.在内的变种.
- 结冷EM显示O5C2准了尖端蛋白的受体结合域 (RBD) 上的一个大型表位,重叠了ACE2接口.
- 在体内,O5C2证明了对BA.5 Omicron感染的保护,调节与亡和干扰素反应相关的宿主基因表达.
结论:
- O5C2代表了针对SARS-CoV-2的泛保护性治疗药物的有前途的候选者.
- 由O5C2准的广泛表位可能会对病毒逃逸产生抵抗力.
- 了解O5C2的机制为设计下一代COVID-19治疗方法提供了洞察力.
相关概念视频
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Antibodies, also known as immunoglobulins, are produced by B cells in response to foreign substances, such as bacteria and viruses. These proteins are critical for recognizing and neutralizing these substances, protecting the body from potential harm.
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Antibodies consist of four polypeptide chains: two identical heavy...
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
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