病毒表面显示了一种仿真免疫球蛋白Fc域,以促进抗原呈现细胞的吸收
Sayuri Seki1, Prince Kofi Parbie2, Hiroyuki Yamamoto3
1AIDS Research Center, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan.
Journal of biotechnology
|June 8, 2024
概括
研究人员设计了类似病毒的粒子 (VLPs),在它们的表面上显示抗体碎片 (Fc),增强抗原呈现细胞 (APC) 的吸收,如巨细胞和树突细胞,以改善免疫反应.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 抗原呈现细胞 (APC),包括巨细胞和树突细胞 (DC),通过弥合先天性和适应性免疫反应,对抗病毒免疫是至关重要的.
- 在某些情况下,通过Fc受体相互作用,APCs通过抗体介导的吸收增强了病原体清除.
- 直接在病毒颗粒上显示Fc域以增强APC fagocytosis的潜力仍然在很大程度上未被探索.
研究的目的:
- 研究在逆转录病毒病毒和病毒样粒子 (VLP) 上显示功能Fc域的可行性.
- 评估Fc显示病毒/VLP是否可以增强APCs的抗原吸收.
- 评估这种策略作为改善抗原呈现的分子辅助剂的潜力.
主要方法:
- 一个融合蛋白的表达向量的构建,该向量将小鼠Fc片段与逆转录病毒跨膜 (TM) 区域连接起来.
- 同传染产生具有Fc-TM融合蛋白的逆转录病毒颗粒.
- 化表现Fc的猿类免疫缺陷病毒 (SIV) 和基于小鼠白血病病毒 (MLV) 的VLP (携带流感HA抗原) 与小鼠巨细胞和骨髓衍生的DCs.
- 使用成像细胞计量对Fc受体依赖吸收的评估.
主要成果:
- 在逆转录病毒粒子和VLP上成功地表达了Fc-TM融合蛋白的表面表达.
- 显示Fc的SIV颗粒显示了巨细胞和DCs显著增强的Fc受体依赖吸收.
- 携带流感血素 (HA) 的Fc显示MLV-VLP显示了巨细胞增加HA内部化,证实了抗原兼容性.
结论:
- 在某些逆转录病毒粒子和VLP上,Fc-TM融合分子可以有效地显示.
- 这种显示策略增强了Fc受体介导的抗原被APC吸收.
- 显示Fc的病毒/VLP是作为分子辅助剂的有希望的方法,以促进APCs的抗原吸收,以改善免疫反应.
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