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Chemical Inactivation of the E3 Ubiquitin Ligase Cereblon by Pomalidomide-based Homo-PROTACs
Published on: May 15, 2019
Modular PROTAC/IMiD Bifunctional Molecule Design for the Degradation of Synergistic Targets in the Treatment of
Yuheng Jin1, Xueyan Liao2,3, Jingyu Zhang1
1Institute of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China.
Abstract:
Leveraging the synergistic effects of IMiDs-induced neo-substrate degradation with the targeted protein destruction capability of PROTACs offers a potent therapeutic strategy for combating malignancies. However, identifying synergistic targets and the corresponding PROTAC/IMiD is still a significant challenge. In this study, we present a comprehensive approach that integrates a bifunctional molecule design-oriented (BMDO) IMiD library. Taking BCL6 as a starting target, the first BCL6-PROTAC/IMiD BC6 was developed by leveraging the positive correlation between BCL6 and IKZF1/3. BC6 exhibits high selective degradation activity of BCL6 and IKZF1/3, demonstrating superior antiproliferative effects in various germinal center B-cell-like (GCB) and activated B-cell-like (ABC) diffuse large B-cell lymphoma (DLBCL) cell lines and significant in vivo antitumor efficacy. The process also facilitates the discovery of a novel BTK-PROTAC/IMiD BT6. These results pave the way for a promising new treatment avenue for DLBCL, with broad implications for the design of PROTAC/IMiD.
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