Cited by 137Protein Degradation and InhibitorsChemical Synthesis and AnalysisMonoclonal and Polyclonal Antibodies Research

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Targeting IRAK4 for Degradation with PROTACs

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Abstract

Interleukin-1 Receptor-Associated Kinase 4 (IRAK4) is a key mediator of innate immunity. IRAK4 overactivation is linked with several autoimmune diseases. To date, many IRAK4 inhibitors have been developed to block the protein’s kinase activity with the most advanced reaching Phase II clinical trials. Nevertheless, several reports suggest kinase activity is not disease-relevant in certain cell types, so removing scaffolding signaling in addition to IRAK4 kinase activity may offer a better therapeutic outcome. Herein, we describe the design and synthesis of an IRAK4 Proteolysis Targeted Chimera (PROTAC). We show that IRAK4 degradation induced by compound 9 leads to the inhibition of multiple cytokines in PBMCs. However, in IL-1β stimulated human dermal fibroblasts, inhibition of IL-6 and TNF-α release was not observed despite IRAK4 degradation. Nonetheless, the possibility of targeting both IRAK4 kinase and scaffolding function could potentially lead to new therapeutic opportunities to treat autoimmune, inflammatory, and oncological diseases.

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Crossref · 10.1021/acsmedchemlett.9b00219

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Authors
Nunes, J., McGonagle, G. A., Eden, J., Kiritharan, G., Touzet, M., Lewell, X., Emery, J., Eidam, H., Harling, J. D., & Anderson, N. A.
Affiliations
  • GlaxoSmithKline (United Kingdom) (GB)
  • GlaxoSmithKline (United States) (US)
Corresponding author
Anderson, Niall A.
Venue
ACS Medicinal Chemistry Letters
Published
2019-06-14
Volume
10
Issue
7
Pages
1081-1085
ISSN
1948-5875 (ISSN-L)
OpenAlex
W2949458744
Cited by
134
References
17
Citations by year
2026: 5 · 2025: 23 · 2024: 22 · 2023: 21 · 2022: 26 · 2021: 13 · 2020: 20 · 2019: 3
FWCI
5.29
Type
journal article
Language
en
Open access
Locations
  • ACS Medicinal Chemistry Letters (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Physical Sciences › Chemistry › Organic Chemistry › Chemical Synthesis and Analysis
  • Life Sciences › Immunology and Microbiology › Immunology › Monoclonal and Polyclonal Antibodies Research
Keywords
IRAK4, PROTACs, protein degradation, innate immunity, autoimmune disease, IL-1β, cytokine inhibition, interleukin-6, TNF-α, kinase inhibitors, dermal fibroblasts, peripheral blood mononuclear cells

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