针对受体降解的E3无酸酶的抗体向
Hadir Marei1, Wen-Ting K Tsai2, Yee-Seir Kee2
1Discovery Oncology, Genentech, South San Francisco, CA, USA.
Nature
|September 21, 2022
概括
研究人员开发了针对蛋白质分解的抗体 (PROTAB) 来降解细胞表面蛋白质. 这种新方法提供了针对蛋白质降解的强大和选择性方法,克服了传统抑制疗法的局限性.
科学领域:
- 分子生物学
- 药物发现
- 癌症学
背景情况:
- 目前针对血受体的疗法经常抑制连接体结合或酶活性,由于多域蛋白质结构,可能无法完全抑制蛋白质功能.
- 向蛋白质降解,以向蛋白质溶解的嵌合体 (PROTACs) 为例,与抑制相比具有优势,但在开发口服可生物利用的异构功能化合物方面面临挑战.
- 创建高亲和度双目标结合剂的复杂性需要新的有效治疗策略.
研究的目的:
- 开发一种新技术,即向蛋白解的抗体 (PROTAB),用于细胞表面蛋白的降解.
- 为了证明PROTABs针对特定蛋白质的有效性,例如和环指3 (ZNRF3),用于癌症治疗.
- 探索 PROTAB 技术在各种细胞表面 E3 无素连接酶和跨膜受体的需求降解的适应性.
主要方法:
- 旨在将细胞表面E3无素连接酶与跨膜蛋白结合的蛋白质向抗体 (PROTAB) 的开发.
- 在体外和体内验证PROTAB介导的目标降解,重点是结直肠癌模型中的ZNRF3.
- 系统选各种E3连接酶和受体,以评估PROTAB的多功能性和"按需"降解能力.
- 针对抗体格式进行工程,以优化降解效率并了解潜在的原理.
主要成果:
- 在体外和体内,PROTABs成功诱导了向蛋白质降解.
- 该方法通过向ZNRF3来实现结直肠癌特异性降解的有效性.
- 该技术被证明可以适应"按需"降解在一系列细胞表面E3链酶和受体.
- 通过工程抗体格式获得了对目标降解规则的洞察力.
结论:
- 针对蛋白质分解的抗体 (PROTAB) 是细胞表面蛋白质的强效,生物可用和组织选择性降解的可行策略.
- 这项技术提供了针对蛋白质降解的新范式,有可能克服现有的治疗方式的局限性.
- PROTAB提供了一个灵活的平台,用于开发各种疾病的新疗法,包括癌症.
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