Cited by 61Protein Degradation and InhibitorsCell death mechanisms and regulationUbiquitin and proteasome pathways

Discovery of a Novel BCL-XL PROTAC Degrader with Enhanced BCL-2 Inhibition

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Pal, Pratik, Thummuri, Dinesh, Lv, Dongwen, Liu, Xingui, Zhang, Peiyi, Hu, Wanyi, Poddar, Saikat K., Hua, Nan +5 more·2021·Journal of Medicinal Chemistry

Abstract

BCL-X L and BCL-2 are important targets for cancer treatment. BCL-X L specific proteolysis-targeting chimeras (PROTACs) have been developed to circumvent the on-target platelet toxicity associated with BCL-X L inhibition. However, they have minimal effects on cancer cells that are dependent on BCL-2 or both BCL-X L and BCL-2. Here we report a new series of BCL-PROTACs. The lead PZ703b exhibits high potency in inducing BCL-X L degradation and in inhibiting but not degrading BCL-2, showing a hybrid dual-targeting mechanism of action that is unprecedented in a PROTAC molecule. As a result, PZ703b is highly potent in killing BCL-X L dependent, BCL-2 dependent, and BCL-X L /BCL-2 dual-dependent cells in an E3 ligase (VHL)-dependent fashion. We further found that PZ703b forms stable {BCL-2:PROTAC:VCB} ternary complexes in live cells that likely contribute to the enhanced BCL-2 inhibition by PZ703b. With further optimization, analogues of PZ703b could potentially be developed as effective antitumor agents by co-targeting BCL-X L and BCL-2.

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Crossref · 10.1021/acs.jmedchem.1c00517

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  1. [16]Wang G; Zhang H; Zhou J; Ha C; Pei D; Ding K An Efficient Synthesis of ABT-263, a Novel Inhibitor of Antiapoptotic Bcl-2 Proteins. Synthesis, 2008, 15, 2398– 2404.

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Authors
Pal, P., Thummuri, D., Lv, D., Liu, X., Zhang, P., Hu, W., Poddar, S. K., Hua, N., Khan, S., Yuan, Y., Zhang, X., Zhou, D., & Zheng, G.
Affiliations
University of Florida (US)
Corresponding author
  • Zhou, Daohong
  • Zheng, Guangrong
Venue
Journal of Medicinal Chemistry
Published
2021-09-17
Volume
64
Issue
19
Pages
14230-14246
ISSN
  • 0022-2623 (ISSN-L)
  • 1520-4804
OpenAlex
W3201370051
Cited by
60
References
35
Citations by year
2026: 7 · 2025: 18 · 2024: 9 · 2023: 10 · 2022: 16
FWCI
2.83
Type
journal article
Language
en
Open access
Locations
  • Journal of Medicinal Chemistry (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Cancer Institute (R01CA241191, R01CA242003)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
Keywords
BCL-2 inhibition, PROTACs, ternary complex, anticancer agents, platelet toxicity
MeSH terms
Dose-Response Relationship, Drug, Humans, Structure-Activity Relationship, Molecular Structure, Proto-Oncogene Proteins c-bcl-2, bcl-X Protein, Drug Discovery, Proteolysis

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