Cited by 281Protein Degradation and InhibitorsChemical Synthesis and AnalysisSynthesis and pharmacology of benzodiazepine derivatives

Discovery of QCA570 as an Exceptionally Potent and Efficacious Proteolysis Targeting Chimera (PROTAC) Degrader of the Bromodomain and Extra-Terminal (BET) Proteins Capable of Inducing Complete and Durable Tumor Regression

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Qin, Chong, Hu, Yang, Zhou, Bing, Fernandez-Salas, Ester, Yang, Chao-Yie, Liu, Liu, McEachern, Donna, Przybranowski, Sally +16 more·2018·Journal of Medicinal Chemistry

Abstract

Proteins of the bromodomain and extra-terminal (BET) family are epigenetics "readers" and promising therapeutic targets for cancer and other human diseases. We describe herein a structure-guided design of [1,4]oxazepines as a new class of BET inhibitors and our subsequent design, synthesis, and evaluation of proteolysis-targeting chimeric (PROTAC) small-molecule BET degraders. Our efforts have led to the discovery of extremely potent BET degraders, exemplified by QCA570, which effectively induces degradation of BET proteins and inhibits cell growth in human acute leukemia cell lines even at low picomolar concentrations. QCA570 achieves complete and durable tumor regression in leukemia xenograft models in mice at well-tolerated dose-schedules. QCA570 is the most potent and efficacious BET degrader reported to date.

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  • The latter study's series of very potent degraders yield high FFC values when explored through the computational approach.

    “That said, the latter study reports a series of very potent degraders 62, and indeed these yield high FFC values when explored through our computational approach (Table S1).”
  • QCA570 is the most potent BET PROTAC, displaying picomolar potency against human acute leukemia cell lines in vitro and in vivo.

    “QCA570 is the most potent BET PROTAC that displays picomolar potency against human acute leukemia cell lines in vitro and in vivo [93].”

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Authors
Qin, C., Hu, Y., Zhou, B., Fernandez-Salas, E., Yang, C.-Y., Liu, L., McEachern, D., Przybranowski, S., Wang, M., Stuckey, J., Meagher, J., Bai, L., Chen, Z., Lin, M., Yang, J., Ziazadeh, D. N., Xu, F., Hu, J., Xiang, W., Huang, L., Li, S., Wen, B., Sun, D., & Wang, S.
Affiliations
University of Michigan (US)
Corresponding author
Wang, Shaomeng
Venue
Journal of Medicinal Chemistry
Published
2018-07-18
Volume
61
Issue
15
Pages
6685-6704
ISSN
  • 0022-2623 (ISSN-L)
  • 1520-4804
OpenAlex
W2883182240
Cited by
281
References
57
Citations by year
2026: 19 · 2025: 22 · 2024: 37 · 2023: 30 · 2022: 40 · 2021: 40 · 2020: 48 · 2019: 42 · 2018: 3
FWCI
12.45
Type
journal article
Language
en
Open access
Locations
  • Journal of Medicinal Chemistry (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • Deep Blue (University of Michigan) (submittedVersion)
Funders
  • National Cancer Institute (R01 CA215758, P30 CA046592)
  • Breast Cancer Research Foundation
  • Prostate Cancer Foundation
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chemical Synthesis and Analysis
  • Physical Sciences › Chemistry › Organic Chemistry › Synthesis and pharmacology of benzodiazepine derivatives
Keywords
PROTAC degraders, BET proteins, structure-based drug design, acute leukemia, tumor regression, xenograft models, epigenetic reader protein, small-molecule degraders
MeSH terms
Bromodomain Containing Proteins, Animals, Dose-Response Relationship, Drug, Female, Humans, Models, Molecular, Protein Conformation, Proteins, Drug Design, Cell Line, Tumor, Mice, Small Molecule Libraries, Proteolysis

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