解码交叉免疫压力:登革热在SARS-CoV-2演变中的作用
Abinash Mallick1, Rudra Chhajer1, Subhajit Biswas1,2
1Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, West Bengal 700032, India.
Computational and structural biotechnology journal
|December 26, 2025
概括
登革热病毒抗体显示与SARS-CoV-2的交叉反应,影响尖端蛋白突变. 这些登革热病毒抗体可能会对SARS-CoV-2的进化产生选择压力.
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:
- 已经观察到登革热病毒 (DV) 抗体 (Abs) 和SARS-CoV-2 Abs之间的交叉反应,表明潜在的交叉保护.
- 新出现的SARS-CoV-2变种在尖端蛋白中表现出突变,可能是为了逃避与DV Abs的相互作用.
- 了解这些相互作用对于理解共同流行地区的病毒进化和免疫反应至关重要.
研究的目的:
- 为了研究交叉反应性DV Abs对SARS-CoV-2尖端蛋白突变的影响.
- 用计算方法分析这些交叉相互作用的结构基础.
- 评估DV Abs对SARS-CoV-2施加选择压力的潜力.
主要方法:
- 分析SARS-CoV-2主要变种 (如肯特,三角形,奥米克朗) 中的尖端蛋白的突变.
- 结构研究和分子对接模拟使用登革热病毒2型 (DV-2) 封面 (E) 绝对.
- 酶链接免疫吸收试验 (ELISA) 检测大流行前的DV Ab阳性血清与SARS-CoV-2尖端受体结合域 (RBD) 的交叉结合.
- 替代病毒中和试验,以评估交叉中和潜力.
主要成果:
- 大多数SARS-CoV-2尖端变体的特征突变似乎主要受到DV Abs的影响.
- 在大流行前的DV Ab-阳性血清和野生型SARS-CoV-2 RBD之间观察到特定的交叉结合.
- 对接模拟显示了DV E Abs和特定RBD区域之间的最大交叉相互作用.
- 交叉反应性DV Abs证明了对SARS-CoV-2的交叉中和潜力.
- 较晚的SARS-CoV-2变种 (Omicrons) 与早期的菌株相比,与DV的交叉反应性显著降低.
结论:
- 登革热病毒抗体在塑造SARS-CoV-2尖端蛋白突变方面发挥着重要作用.
- 交叉反应性DV Abs可以对SARS-CoV-2施加选择压力,影响其进化轨迹.
- 在最近的变体中观察到的交叉反应性减少表明SARS-CoV-2正在进行的进化适应,以逃避DV Ab介导的压力.
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