在受体结合领域引起关注的SARS-CoV-2变异的抗体逃逸:一种计算方法
Dac-Nhan Nguyen1, Quoc-Thai Nguyen2, Thoai-My Dang1
1University of Health Sciences, Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Viet Nam; Research Center for Discovery and Development of Healthcare Products, Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Viet Nam; Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Viet Nam.
Journal of theoretical biology
|December 8, 2025
概括
像Omicron这样的SARS-CoV-2变种显示出由于尖端蛋白的突变而增加了免疫逃避.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 结构生物学 结构生物学
背景情况:
- SARS-CoV-2 尖端蛋白的受体结合域 (RBD) 介导病毒的进入和抗体结合.
- 了解SARS-CoV-2变种与中和抗体的相互作用对于治疗开发至关重要.
研究的目的:
- 为了评估SARS-CoV-2 Delta和Omicron变异突变对抗体结合和中和的影响.
- 评估针对这些变异的特定单克隆抗体的疗效.
主要方法:
- 使用HADDOCK 2.4进行分子对接模拟,以预测结合相互作用和亲和关系.
- 使用GROMACS进行分子动力学模拟,并使用gmx_MMPBSA进行结合自由能量计算.
- 从野生类型,三角形和Omicron变体中分析RBD结构,复杂化与九个RBD定向抗体.
主要成果:
- 特别突变在德尔塔 (L452R,T478K) 和奥米克朗 (K417N,E484A,S477N,Q493R) 显著影响抗体相互作用.
- 与三角洲变种相比,Omicron显示出更高的免疫逃避潜力.
- 索特罗维马布与三角形和奥米克朗两种变体都表现出强烈的结合,而埃塞维马布有效地与三角形结合,但对奥米克朗的结合较小.
结论:
- 奥米克朗的突变赋予了显著的免疫逃避特性,需要更新的治疗策略.
- 索特罗维马布和埃塞维马布是SARS-CoV-2变种的有希望的治疗候选者,需要进一步的体外和体内研究.
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