Aptamer Inhibits Tumor Growth by Leveraging Cellular Proteasomal Degradation System to Degrade c‐Met in Mice

Autor: Kun Chen, Jiamin Cai, Sujuan Wang, Yingying Li, Chan Yang, Ting Fu, Zilong Zhao, Xiaobing Zhang, Weihong Tan
Rok vydání: 2022
Předmět:
Zdroj: Angewandte Chemie International Edition. 62
ISSN: 1521-3773
1433-7851
DOI: 10.1002/anie.202208451
Popis: Current action mechanisms for aptamer-based therapeutics depend on occupancy-driven pharmacology to mediate protein functions. We report a new mechanism where aptamers leverage cellular proteasomal degradation system to degrade proteins for cancer treatment. A DNA aptamer (hereinafter referred to as c-Met-Ap) binds to the extracellular domain of mesenchymal-epithelial transition factor (c-Met) and selectively induces c-Met phosphorylation at Y1003 and Y1349. The phosphorylation of Y1003 recruits E3 ubiquitin ligase casitas B-lineage lymphoma, causing c-Met ubiquitination and degradation in the proteasome. Furthermore, c-Met-Ap can induce a decrease in the heterodimeric partner proteins of c-Met and the downstream effector proteins in the c-Met signal axis, effectively inhibiting tumor growth in A549 tumor-bearing BALB/c mice. Our study uncovers a novel, actionable mechanism for aptamer therapeutics and opens a new avenue for developing highly efficient anticancer drugs.
Databáze: OpenAIRE
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