目标补充抑制使用双特异性抗体结合局部抗原和内源补充调节剂
Haiyu Wang1, Fleur S van de Bovenkamp1, Douwe J Dijkstra1
1Department of Immunology, Leiden University Medical Center, Leiden, Netherlands.
Frontiers in immunology
|May 31, 2024
概括
新型双特异性抗体 (bsAbs) 通过招募内源性调节剂,实现位点导向的补充抑制. 这种方法保护细胞免受补充介导的损伤,为补充驱动疾病提供向治疗.
科学领域:
- 免疫学 免疫学 免疫学
- 生物技术是生物技术.
背景情况:
- 补充激活对免疫力至关重要,但也导致自身免疫性疾病和移植排斥.
- 目前的补充抑制剂由于系统性作用而带来感染风险.
- 需要有针对性的补充抑制来减轻病理效应,同时保持免疫功能.
研究的目的:
- 开发和评估双特异性抗体 (bsAbs) 用于局部导向的补充抑制.
- 研究bsAbs能够招募内源补充调节器 (H因子和C4b结合蛋白) 到细胞的能力.
- 评估bsAbs在预防补充介导细胞溶解中的有效性.
主要方法:
- 设计和分析的双特异抗体 (bsAbs) 必须与补充调节因子H (FH) 或C4b结合蛋白 (C4BP) 交叉链接目标抗原.
- 对 bsAbs 进行了评估,以检测它们在经典,莱克和替代途径中抑制补充剂激活的能力.
- 在体外使用抗原阳性脂质体,红细胞和人体白细胞测试了bsAbs,以评估对补充介导溶解的保护.
主要成果:
- bsAbs成功地招募了内源性血清FH和C4BP,以实现局部补充抑制.
- 观察到抑制了古典,莱克和替代补充途径.
- bsAbs有效地保护目标细胞,包括脂质体,红细胞和白细胞,免受补充介导的溶解.
结论:
- 双特异性抗体可以通过将内源调节剂招募到细胞表面来实现局部补充抑制.
- 这种有针对性的方法为补充介导疾病提供了潜在的治疗策略.
- 局部补充抑制可以降低与全身补充抑制剂相关的风险.
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