治疗性抗体被内化到树突细胞中作为免疫性风险因素
Michel Siegel1, Anna-Lena Bolender2, Axel Ducret1
1Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, Basel, Switzerland.
Frontiers in immunology
|September 12, 2024
概括
治疗性抗体的表面电荷会影响免疫反应. 带正电荷的抗体更多地被树突细胞内化,增加T细胞激活和免疫性风险,突出需要谨慎的临床前设计.
科学领域:
- 生物制药的发展.
- 免疫学 免疫学 免疫学
- 蛋白质工程是一种蛋白质工程.
背景情况:
- 免疫性,即对治疗抗体的免疫反应,使生物治疗的发展复杂化.
- 抗体内化到树突细胞 (DCs) 是驱动免疫性的一个关键因素.
- 了解抗体特性如何影响DC相互作用对于减轻不良免疫反应至关重要.
研究的目的:
- 调查抗体内部化对DCs对免疫原性的影响.
- 探索抗体表面电荷在细胞吸收,呈现和T细胞激活中的作用.
- 评估抗体内部化率与引发免疫反应的风险之间的相关性.
主要方法:
- 使用的工具抗体与工程正负电荷补丁用于差异细胞吸收.
- 用不成熟的单细胞衍生树突细胞 (moDCs) 进行内化试验.
- 评估了溶酶体积累,MHC-II关联蛋白质组 (MAPP) 和CD4+T细胞激活,包括使用特定的OVA表位.
主要成果:
- 带有正电荷补丁的抗体显示出更高的溶酶体积累和表位表现.
- 在抗体内部化率和MHC-II分子上的呈现之间建立了直接的相关性.
- 增强的CD4+T细胞反应与增加的DC内化和呈现相关.
结论:
- 生物物理性质,特别是表面电荷,显著影响治疗性抗体内部化到DCs.
- 较快的内部化和DCs的处理增加了呈现和免疫反应的可能性.
- 在临床前开发期间优化抗体表面电荷和其他增强积累的特性对于降低免疫性风险至关重要.
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