ROTACs利用信号不合格的R-脊髓蛋白进行向蛋白质降解
Rui Sun1, Zibo Meng2, Hyeyoon Lee1
1Division of Molecular Embryology, DKFZ-ZMBH Alliance, Deutsches Krebsforschungszentrum (DKFZ), 69120 Heidelberg, Germany.
Cell chemical biology
|June 15, 2023
概括
研究人员开发了ROTACs,新型双特异性R-脊髓蛋白 (RSPO) 嵌合体,以降解PD-L1.1等细胞表面蛋白质. 这项新技术有效地准跨膜蛋白,为癌症治疗提供了一个有前途的治疗策略.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 向蛋白解析的仿真体 (PROTACs) 具有治疗潜力,但在向细胞表面蛋白质方面存在局限性.
- 现有的PROTACs很难有效地降解跨膜蛋白.
研究的目的:
- 介绍ROTACs (R-spondin (RSPO) 嵌合体) 作为一种新的方法,用于降解目标细胞表面蛋白.
- 证明ROTACs在降解免疫检查点蛋白PD-L1.1方面的有效性.
主要方法:
- 设计和合成双特异的RSPO仿真体 (ROTACs),利用ZNRF3/RNF43 E3链酶.
- 利用一个特定的RSPO2-PD-L1仿真体 (R2PD1) 来准黑色素瘤细胞上的PD-L1.
- 评估了PD-L1降解,对ZNRF3/RNF43的依赖,以及体外抗瘤作用.
主要成果:
- 在Picomolar度下,R2PD1仿真体诱导了PD-L1的溶酶体降解.
- 在三种黑色素瘤细胞系中达到50-90%的PD-L1降解,依赖于ZNRF3/RNF43.
- 与Atezolizumab相比,R2PD1显示出较强的瘤细胞增殖和T细胞活性抑制.
结论:
- 信号禁用ROTAC为向细胞表面蛋白质进行降解提供了一个新的范式.
- 这种方法具有各种治疗应用的潜力,特别是在癌症免疫治疗中.
- ROTACs提供了一种强有力的策略,可以克服当前PROTACs对细胞表面点的局限性.
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