一种CXCR4/CD4伪型的rhabdovirus,可以选择性地感染HIV-1包膜蛋白表达细胞
T Mebatsion1, S Finke, F Weiland
1Department of Clinical Virology, Federal Research Center for Virus Diseases of Animals, Tübingen, Germany.
Cell
|September 23, 1997
概括
研究人员对狂犬病病毒 (RV) 进行了基因工程,以向表达特定蛋白质的细胞. 这种病毒载体方法显示出选择性感染细胞的前景,有可能用于体内治疗应用.
科学领域:
- 病毒学和分子生物学
- 细胞和分子免疫学 细胞和分子免疫学
- 基因治疗和病毒载体设计
背景情况:
- 细胞受体对于病毒进入和感染至关重要.
- 狂犬病病毒 (RV) 是一种包裹式病毒,利用其G蛋白进入细胞.
- 用病毒载体向特定的细胞群体需要精确控制病毒热带.
研究的目的:
- 调查细胞受体在狂犬病病毒病毒包裹中的功能整合.
- 为了确定伪型狂犬病病毒是否可以选择性地感染表达特定连接体的细胞.
- 探索工程病毒载体在体内有针对性传递的潜力.
主要方法:
- 构建G缺陷狂犬病病毒的伪型,具有嵌合式受体蛋白 (CD4和CXCR4).
- 感染测定使用被设计成表达HIV-1包膜蛋白或特定受体的细胞.
- 使用包膜蛋白或CD4抗体对病毒进入阻断的分析.
- 研究伪型病毒形成效率和蛋白质结合机制.
主要成果:
- 伪型狂犬病病毒选择性地感染了表达目标HIV-1包膜蛋白的细胞.
- 病毒的进入被针对信封蛋白或CD4的抗体有效地阻止.
- 化学受体蛋白与RV G尖端蛋白的细胞质尾巴增强了伪型的形成.
- 嵌合蛋白的差异性结合表明了寡合蛋白在病毒包裹中分类的机制.
结论:
- 细胞受体可以在功能上集成到狂犬病病毒包裹中,以赋予特定的细胞热带性.
- 显示特定受体的工程病毒载体为选择性病毒向提供了一种战略.
- 这种方法有可能开发新的治疗试剂,以向体内感染病毒的细胞.
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