针对性蛋白质降解系统,以增强Wnt信号传递
Parthasarathy Sampathkumar1, Heekyung Jung1, Hui Chen1
1Surrozen, Inc, South San Francisco, United States.
eLife
|June 7, 2024
概括
针对亚亚糖蛋白受体 (ASGR) 的新抗体增强了Wnt信号传递,并促进了向蛋白降解 (TPD). 这些工程分子为潜在的肝病治疗提供了联合治疗效果.
科学领域:
- 生物化学 生化学
- 免疫学 免疫学 免疫学
- 药物发现 药物发现 药物发现
背景情况:
- 向蛋白质降解 (TPD) 是一个有前途的治疗策略.
- 亚亚糖蛋白受体 (ASGR) 在肝细胞上被选择性表达.
- 以前的工程融合蛋白 (SWEETS) 在小鼠模型中增强了Wnt信号和肝功能.
研究的目的:
- 识别和描述针对ASGR1和ASGR1/2.2.的新抗体.
- 评估新型ASGR向融合蛋白的治疗潜力.
- 探索单个分子中不同治疗效果和降解机制的组合.
主要方法:
- 鉴定和描述ASGR1和ASGR1/2特异性抗体 (8M24和8G8).
- 测定ASGR1:8M24和ASGR2:8G8复合物的高分辨率晶体结构.
- 用RSPO2RA将抗体组装成SWEETS融合蛋白,用于功能评估.
主要成果:
- 发现了两种新型抗体,8M24和8G8,它们结合了不同的ASGR表位.
- 包含这些抗体的SWEETS分子通过隔离E3酶来增强Wnt活性.
- 8M24-RSPO2RA和8G8-RSPO2RA通过TPD证明了有效的ASGR1下调.
结论:
- 新的ASGR向抗体可以被设计成具有双重治疗作用的融合蛋白.
- 这些发现凸显了将增强的Wnt信号和TPD结合在单个治疗分子中的潜力.
- 这种方法为开发新型肝细胞向疗法提供了一种多功能战略.
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