4.5 Article

Discovery of a Potent and Selective Covalent Inhibitor of Bruton's Tyrosine Kinase with Oral Anti-Inflammatory Activity

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ACS MEDICINAL CHEMISTRY LETTERS
卷 12, 期 5, 页码 782-790

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AMER CHEMICAL SOC
DOI: 10.1021/acsmedchemlett.1c00044

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Bruton's; BTK; atropisomer; covalent; K-inact

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The discovery of a novel potent and selective covalent BTK inhibitor represents a promising approach to improving treatment outcomes in autoimmune disorders. Compound 27 shows selectivity for BTK, strong in vivo occupancy, sustained efficacy, and dose-dependent reduction of joint inflammation in a rat model of collagen-induced arthritis.
Bruton's tyrosine kinase (BTK) is a cytoplasmic tyrosine kinase that plays a critical role in the activation of B cells, macrophages, and osteoclasts. Given the key role of these cell types in the pathology of autoimmune disorders, BTK inhibitors have the potential to improve treatment outcomes in multiple diseases. Herein, we report the discovery and characterization of a novel potent and selective covalent 4-oxo-4,5-dihydro-3H-1-thia-3,5,8-triazaacenaphthylene-2-carboxamide BTK inhibitor chemotype. Compound 27 irreversibly inhibits BTK by targeting a noncatalytic cysteine residue (Cys481) for covalent bond formation. Compound 27 is characterized by selectivity for BTK, potent in vivo BTK occupancy that is sustained after it is cleared from systemic circulation, and dose-dependent efficacy at reducing joint inflammation in a rat collagen-induced arthritis model.

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Article Chemistry, Medicinal

Discovery of JNJ-64264681: A Potent and Selective Covalent Inhibitor of Bruton's Tyrosine Kinase

Mark S. Tichenor, John J. M. Wiener, Navin L. Rao, Genesis M. Bacani, Jianmei Wei, Charlotte Pooley Deckhut, J. Kent Barbay, Kevin D. Kreutter, Leon Chang, Kathleen W. Clancy, Heather E. Murrey, Weixue Wang, Kay Ahn, Michael Huber, Elizabeth Rex, Kevin J. Coe, Jiejun Wu, Haopeng Rui, Kia Sepassi, Marcello Gaudiano, Mariette Bekkers, Ivo Cornelissen, Kathryn Packman, Mark Seierstad, Christos Xiouras, Scott D. Bembenek, Richard Alexander, Cynthia Milligan, Sriram Balasubramanian, Alec D. Lebsack, Jennifer D. Venable, Ulrike Philippar, James P. Edwards, Gavin Hirst

Summary: This study reports a novel BTK inhibitor, JNJ-64264681, with potent activity and selectivity, showing excellent oral efficacy in cancer and autoimmune disease models, and has advanced into human clinical studies.

JOURNAL OF MEDICINAL CHEMISTRY

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