Cited by 249Protein Degradation and InhibitorsLung Cancer Treatments and MutationsChemical Synthesis and Analysis

Proteolysis Targeting Chimeras (PROTACs) of Anaplastic Lymphoma Kinase (ALK)

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Zhang, Chengwei, Han, Xiao-Ran, Yang, Xiaobao, Jiang, Biao, Liu, Jing, Xiong, Yue, Jin, Jian·2018·European Journal of Medicinal Chemistry

Abstract

Anaplastic lymphoma kinase (ALK) activation has been associated with many types of human cancer. Significant efforts have been devoted to the development of ALK inhibitors to antagonize the kinase activity of ALK. Four ALK inhibitors have been approved by the FDA to date for treating patients with ALK-positive non-small cell lung cancers (NSCLC). However, drug resistance has been observed in the majority of patients treated with these inhibitors. New therapeutic strategies (e.g., compounds with novel mechanisms of action) are needed to overcome the drug resistance issue. The emerging PROTAC (Proteolysis Targeting Chimera) technology has been successfully applied to selective degradation of multiple protein targets, but not ALK. Since ALK protein levels are not important for viability in mammals, ALK PROTACs could lead to novel therapeutics with minimal toxicity. Here we report the design, synthesis and biological evaluation of novel PROTACs (degraders) of ALK. MS4077 (5) and MS4078 (6) potently decreased cellular levels of oncogenic active ALK fusion proteins in a concentration- and time-dependent manner in SU-DHL-1 lymphoma and NCI-H2228 lung cancer cells. The ALK protein degradation induced by compounds 5 and 6 was cereblon and proteasome dependent. In addition, compounds 5 and 6 potently inhibited proliferation of SU-DHL-1 cells. Furthermore, compound 6 displayed good plasma exposure in a mouse pharmacokinetic study, thus is suitable for in vivo efficacy studies. We also developed MS4748 (7) and MS4740 (8), very close analogs of 5 and 6 respectively, which are incapable to degrade the ALK fusion proteins, as negative controls. Compounds 5-8 are valuable chemical tools for investigating effects of ALK pharmacological degradation. Our study paved the way for developing the next generation of ALK PROTACs.

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Crossref · 10.1016/j.ejmech.2018.03.071

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  • PROTACs were shown to be substrates for MDR1.

    “Recently, PROTACs were shown to be substrates for MDR1 (10, 13), suggesting that drug efflux represents a potential limitation for degrader therapies.”
  • A number of PROTACs have been developed to target various proteins of interest involved in the tumorigenesis and progression of hematologic malignancies, including ALK, Bcl-xL, BCR-ABL, BTK, BRD4, CDK-6, FLT-3, HDAC6, and STAT3.

    “A number of PROTACs have been developed to target various POIs that are involved in the tumorigenesis and progression of hematologic malignancies, such as anaplastic lymphoma kinase (ALK) [5], Bcl-xL [4], BCR-ABL [6], Bruton’s tyrosine kinase (BTK) [7], BRD4 [8], CDK-6 [9], FMS-like tyrosine kinase-3 (FLT-3) [10], HDAC6 [11], and signal transducer and activator of transcription 3 (STAT3) [3].”
  • ALK was degraded by two PROTACs based on a pomalidomide warhead targeting CRBN linked with either LDK378 (ceritinib) or TAE684.

    “Recently, the anaplastic lymphoma kinase (ALK) was degraded by two PROTACs based on a pomalidomide warhead targeting CRBN linked with either LDK378 (ceritinib) [79, 80] or TAE684 [79] targeting ALK.”

    From Advances in targeted degradation of endogenous proteins (2019) · cites this paper as [80]

  • Both PROTACs reduced downstream signalling and proliferation of ALK-driven cell lines by degrading ALK.

    “Both PROTACs were able to reduce downstream signalling and proliferation of ALK-driven cell lines by degrading ALK [79, 80].”

    From Advances in targeted degradation of endogenous proteins (2019) · cites this paper as [80]

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Authors
Zhang, C., Han, X.-R., Yang, X., Jiang, B., Liu, J., Xiong, Y., & Jin, J.
Affiliations
  • Tisch Cancer Institute (US)
  • ShanghaiTech University (CN)
  • University of North Carolina at Chapel Hill (US)
Corresponding author
  • Liu, Jing
  • Xiong, Yue
  • Jin, Jian
Venue
European Journal of Medicinal Chemistry
Publisher
Elsevier BV
Published
2018-05
Volume
151
Pages
304-314
ISSN
0223-5234 (ISSN-L)
OpenAlex
W2794623623
Cited by
226
References
57
Citations by year
2026: 17 · 2025: 23 · 2024: 24 · 2023: 26 · 2022: 31 · 2021: 31 · 2020: 38 · 2019: 26 · 2018: 9 · 2014: 1
FWCI
9.69
Type
journal article
Language
en
Open access
Locations
  • European Journal of Medicinal Chemistry (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
U. S. National Institutes of Health (R01GM067113)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chemical Synthesis and Analysis
Keywords
PROTACs, anaplastic lymphoma kinase, cereblon ligands, proteasomal degradation, ALK fusion proteins, drug resistance, non-small cell lung cancer, ALK-positive lymphoma, pharmacokinetics, kinase inhibitors
MeSH terms
Anaplastic Lymphoma Kinase, Animals, Antineoplastic Agents, Humans, Lung Neoplasms, Lymphoma, Male, Drug Design, Signal Transduction, Receptor Protein-Tyrosine Kinases, Cell Line, Tumor, Protein Kinase Inhibitors, Cell Proliferation, Mice, Proteolysis

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