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Purvis GSD, Collino M, Aranda-Tavio H, Chiazza F, O'Riordan CE, Zeboudj L, Mohammad S, Collotta D, Verta R, Guisot NES, Bunyard P, Yaqoob MM, Greaves DR, Thiemermann C. Inhibition of Bruton's TK regulates macrophage NF-κB and NLRP3 inflammasome activation in metabolic inflammation. Br J Pharmacol 2020; 177:4416-4432. [PMID: 32608058 PMCID: PMC7484557 DOI: 10.1111/bph.15182] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 06/11/2020] [Accepted: 06/14/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND AND PURPOSE There are no medications currently available to treat metabolic inflammation. Bruton's tyrosine kinase (BTK) is highly expressed in monocytes and macrophages and regulates NF-κB and NLRP3 inflammasome activity; both propagate metabolic inflammation in diet-induced obesity. EXPERIMENTAL APPROACH Using an in vivo model of chronic inflammation, high-fat diet (HFD) feeding, in male C57BL/6J mice and in vitro assays in primary murine and human macrophages, we investigated if ibrutinib, an FDA approved BTK inhibitor, may represent a novel anti-inflammatory medication to treat metabolic inflammation. KEY RESULTS HFD-feeding was associated with increased BTK expression and activation, which was significantly correlated with monocyte/macrophage accumulation in the liver, adipose tissue, and kidney. Ibrutinib treatment to HFD-fed mice inhibited the activation of BTK and reduced monocyte/macrophage recruitment to the liver, adipose tissue, and kidney. Ibrutinib treatment to HFD-fed mice decreased the activation of NF-κB and the NLRP3 inflammasome. As a result, ibrutinib treated mice fed HFD had improved glycaemic control through restored signalling by the IRS-1/Akt/GSK-3β pathway, protecting mice against the development of hepatosteatosis and proteinuria. We show that BTK regulates NF-κB and the NLRP3 inflammasome specifically in primary murine and human macrophages, the in vivo cellular target of ibrutinib. CONCLUSION AND IMPLICATIONS We provide "proof of concept" evidence that BTK is a novel therapeutic target for the treatment of diet-induced metabolic inflammation and ibrutinib may be a candidate for drug repurposing as an anti-inflammatory agent for the treatment of metabolic inflammation in T2D and microvascular disease.
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Affiliation(s)
- Gareth S D Purvis
- William Harvey Research Institute, Queen Mary University of London, London, UK.,Sir William Dunn School of Pathology, University of Oxford, Oxford, UK
| | - Massimo Collino
- Department of Drug Science and Technology, University of Turin, Turin, Italy
| | | | - Fausto Chiazza
- Department of Drug Science and Technology, University of Turin, Turin, Italy
| | | | - Lynda Zeboudj
- Sir William Dunn School of Pathology, University of Oxford, Oxford, UK
| | - Shireen Mohammad
- William Harvey Research Institute, Queen Mary University of London, London, UK
| | - Debora Collotta
- Department of Drug Science and Technology, University of Turin, Turin, Italy
| | - Roberta Verta
- Department of Drug Science and Technology, University of Turin, Turin, Italy
| | | | | | - Magdi M Yaqoob
- William Harvey Research Institute, Queen Mary University of London, London, UK.,Centre for Diabetic Kidney Disease, Bart's and The London Hospital, London, UK
| | - David R Greaves
- Sir William Dunn School of Pathology, University of Oxford, Oxford, UK
| | - Christoph Thiemermann
- William Harvey Research Institute, Queen Mary University of London, London, UK.,Centre for Diabetic Kidney Disease, Bart's and The London Hospital, London, UK
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