功能上完好无损但抗原上不同的DENV融合循环的演化.
Rita M Meganck1, Deanna Zhu2, Stephanie Dong2
1Department of Molecular Microbiology and Immunology, Saint Louis University, Saint Louis, United States.
eLife
|September 19, 2023
概括
研究人员设计了一种突变的登革热病毒 (DENV) 变种,以逃避抗体依赖增强,这是DENV疫苗面临的主要挑战. 这种修改后的DENV可能会为没有先前接触DENV的人提供更安全的疫苗.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 抗体依赖增强 (ADE) 复杂化登革热病毒 (DENV) 疫苗开发,并与严重的二次登革热病毒感染有关.
- ADE与针对DENV包膜蛋白的保存融合循环 (FL) 动机的抗体相关,这对病毒进入至关重要.
研究的目的:
- 设计一种具有突变FL的DENV变体,可以逃避FL向抗体.
- 评估工程DENV变体对不同类型抗体的中和灵敏度.
主要方法:
- 利用和突变和定向进化来创造一个具有突变FL (D2-FL) 的DENV变体.
- 结合FL突变与修改的prM裂部位生成一个成熟的DENV变体 (D2-FLM).
- 使用来自DENV感染非人类灵长类动物 (NHP) 血清的评估中和度.
主要成果:
- 工程 DENV 变种 (D2-FL 和 D2-FLM) 并没有被 FL 向抗体中和.
- D2-FLM回避了prM和FL向抗体,但对其他抗体仍然敏感.
- 与野生型DENV2相比,异型 (DENV4) NHP血清显示D2-FL和D2-FLM的中和减少,而同型 (DENV2) NHP血清显示类似的中和.
结论:
- D2-FL和D2-FLM是鉴定交叉反应 (CR) 抗体亚型的宝贵工具.
- 这些工程DENV变种代表了开发更安全的活体减弱DENV疫苗的有希望的平台,特别是对于天真的人和儿童.
关键词:
登革热病毒感染者进化 演化 演化 演化 演化 演化 演化 演化融合循环中的融合循环.传染病是一种传染性疾病.微生物学的微生物.和突变发生的原因是和突变.血液中的血清是血清.疫苗 疫苗 疫苗 疫苗病毒病毒病毒病毒.更多相关视频
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