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Updated: Jun 21, 2026

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Highly Sensitive Assay for Measurement of Arenavirus-cell Attachment
Published on: March 2, 2016
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从结构预测到功能:定义非洲猪瘟病毒 CD2v 蛋白质的域,该蛋白质需要与红细胞结合
Ana Luisa Reis1, Anusyah Rathakrishnan1, Vlad Petrovan1
1The Pirbright Institute, Woking, Pirbright, Surrey, United Kingdom.
mBio
|December 17, 2024
概括
非洲猪瘟病毒 (ASFV) 使用其CD2v蛋白质结合红细胞,帮助病毒的持久性. 研究人员创建了一个修改后的ASFV缺乏这种结合能力,导致一个有希望的新活体疫苗候选猪.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 兽医医学 兽医医学 兽医医学
背景情况:
- 非洲猪瘟病毒 (ASFV) 是对全球粮食安全的重大威胁,导致猪群的毁灭性损失.
- 该ASFV EP402R基因编码CD2v糖蛋白,对于红细胞结合和血液中的病毒持久性至关重要.
- 了解ASFV与宿主相互作用对于开发疫苗等有效控制策略至关重要.
研究的目的:
- 描述ASFV CD2v蛋白与宿主红细胞之间的相互作用.
- 为了确定参与CD2v-红细胞结合的特定氨基酸残留物.
- 通过废除红细胞结合,开发一种改性活体ASFV疫苗候选物.
主要方法:
- 蛋白质结构建模和位点定向突变发生,以确定CD2v上的红细胞结合残留物.
- 通过将野生型EP402R基因替换为缺乏红细胞结合能力的突变基因,构建一个减弱的ASFV.
- 用重组病毒免疫猪和随后的挑战研究.
主要成果:
- 鉴定出CD2v的N端Ig类域是红细胞结合区域.
- 一个单一的氨基酸替代取消了CD2v与红细胞的结合.
- 用修改后的病毒免疫接种的猪表现出早期免疫反应,减少病毒性病,轻微的症状,以及对毒性ASFV挑战的高保护.
结论:
- 这项研究阐明了ASFV通过CD2v结合红细胞的机制.
- 废除红细胞结合产生了一个有前途的改性活体ASFV疫苗候选人.
- 这项研究促进了对ASFV与宿主相互作用和疫苗开发策略的理解.
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