对ORFV吸收到宿主细胞的抗体依赖增强
Xidian Tang1,2, Chenyibo Zhang1, Qingru Geng1
1Veterinary Immunology Laboratory, College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling, Shaanxi Province, China.
Virulence
|February 15, 2025
概括
Orf病毒 (ORFV) 通过由Fc受体介导的抗体依赖增强 (ADE) 进入山羊免疫细胞. 相比之下,ORFV通过一种补体依赖的途径感染上皮细胞,揭示出不同的病毒进入机制.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 甲状病毒 (ORFV) 感染各种山羊细胞类型,包括上皮细胞和免疫细胞.
- 之前的研究已经确定了克拉斯林介导的内细胞和巨细胞作为ORFV进入山羊上皮细胞的途径.
- ORFV进入山羊免疫细胞的进入机制仍然没有被描述.
研究的目的:
- 为了阐明ORFV在山羊免疫细胞中的病毒内化途径.
- 研究抗体依赖增强 (ADE) 在ORFV感染免疫细胞中的潜在作用.
- 为了比较ORFV在山羊免疫和上皮细胞中的进入机制.
主要方法:
- 用抗体阻断实验来确定Fc受体 (FcRs) 和补充受体 (CRs) 的作用.
- 对ORFV感染的山羊免疫细胞和山羊上皮细胞进行了实验.
- 对不同细胞类型的病毒内化途径进行比较分析.
主要成果:
- 证实ORFV进入山羊免疫细胞是通过抗体依赖增强 (ADE) 途径调解的,涉及Fc受体 (FcRs).
- 在山羊上皮细胞中也观察到ADE效应,但它不依赖于FcRs.
- 在上皮细胞中,ADE效应似乎涉及与补充因子和补充受体 (CRs) 相关的替代机制.
结论:
- 根据山羊细胞类型,ORFV使用不同的进入途径.
- 由FcRs介导的抗体依赖增强 (ADE) 途径对于ORFV感染山羊免疫细胞至关重要.
- 补充因子和CRs可能在ORFV进入山羊上皮细胞方面发挥作用,突出了ORFV病变的新方面.
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