RNF43的选择性和强大的结剂用于Wnt信号抑制
Sunhee Hwang1, Paula Flórez Salcedo1, Antonion Korcari1
1Departments of †Peptide Therapeutics, ‡Regenerative Medicine, §Structural Biology, ∥Small Molecule Analytical Chemistry and Quality Control, ⊥Microchemistry, Proteomics and Lipidomics, Genentech Inc., South San Francisco, California 94080, United States.
ACS central science
|September 29, 2025
概括
研究人员开发了针对Ring finger 43 (RNF43) 的新,这是Wnt信号传递的关键调节器,与癌症有关. 这些工具可以检测和抑制RNF43,为新的癌症疗法铺平道路.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- Wnt/β-catenin通路对于人类瘤进展至关重要.
- 环指43 (RNF43),一个细胞表面E3泛素结合酶,通过使Frizzled共同受体无处不在来负面调节Wnt信号传递.
- 无活化RNF43突变与各种癌症有关,强调其在瘤生物学中的作用,但由于缺乏特定的分子工具,其精确的机制仍然不清楚.
研究的目的:
- 开发选择性分子工具来检测和操纵内源性环指43 (RNF43).
- 研究RNF43功能的机制及其在Wnt信号传输中的作用.
- 探索RNF43向剂在癌症治疗中的治疗潜力.
主要方法:
- 设计和合成二硫化物受约束,对RNF43.4具有高度亲和力和特异性.
- 生物化在免疫光中的应用,用于在肠道密室中检测RNF43.
- 实验和计算结构分析的整合以建模-RNF43结合.
- 生成一个六价RNF43结合剂 (RNF43-DCP) 来抑制Wnt信号传输.
主要成果:
- 鉴定出一种,GUR-1.6.12.2,对RNF43.4具有很高的亲和力和特异性.
- 通过免疫光检测成功检测到RNF43在肠道密室使用生物化GUR-1.6.12.2.
- 提出了GUR-1.6.12.2与RNF43结合的结构模型.
- 通过与R-spondin竞争,RNF43-DCP显示出对Wnt信号的抑制活性.
结论:
- 开发的RNF43结合剂作为研究RNF43活性的有价值的研究工具.
- 这些结合剂有助于研究RNF43在各种生物环境中的作用.
- 在抗癌策略中,RNF43-DCP显示出作为向Wnt信号的治疗剂的潜力.
- 这项工作为开发针对Wnt途径的选择性抗癌疗法提供了新的途径.
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