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Luci C, Vieira E, Bourinet M, Rousseau D, Bonnafous S, Patouraux S, Lefevre L, Larbret F, Prod’homme V, Iannelli A, Tran A, Anty R, Bailly-Maitre B, Deckert M, Gual P. SYK-3BP2 Pathway Activity in Parenchymal and Myeloid Cells Is a Key Pathogenic Factor in Metabolic Steatohepatitis. Cell Mol Gastroenterol Hepatol 2021; 13:173-191. [PMID: 34411785 PMCID: PMC8593618 DOI: 10.1016/j.jcmgh.2021.08.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 08/09/2021] [Accepted: 08/10/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS Spleen tyrosine kinase (SYK) signaling pathway regulates critical processes in innate immunity, but its role in parenchymal cells remains elusive in chronic liver diseases. We investigate the relative contribution of SYK and its substrate c-Abl Src homology 3 domain-binding protein-2 (3BP2) in both myeloid cells and hepatocytes in the onset of metabolic steatohepatitis. METHODS Hepatic SYK-3BP2 pathway was evaluated in mouse models of metabolic-associated fatty liver diseases (MAFLD) and in obese patients with biopsy-proven MAFLD (n = 33). Its role in liver complications was evaluated in Sh3bp2 KO and myeloid-specific Syk KO mice challenged with methionine and choline deficient diet and in homozygous Sh3bp2KI/KI mice with and without SYK expression in myeloid cells. RESULTS Here we report that hepatic expression of 3BP2 and SYK correlated with metabolic steatohepatitis severity in mice. 3BP2 deficiency and SYK deletion in myeloid cells mediated the same protective effects on liver inflammation, injury, and fibrosis priming upon diet-induced steatohepatitis. In primary hepatocytes, the targeting of 3BP2 or SYK strongly decreased the lipopolysaccharide-mediated inflammatory mediator expression and 3BP2-regulated SYK expression. In homozygous Sh3bp2KI/KI mice, the chronic inflammation mediated by the proteasome-resistant 3BP2 mutant promoted severe hepatitis and liver fibrosis with augmented liver SYK expression. In these mice, the deletion of SYK in myeloid cells was sufficient to prevent these liver lesions. The hepatic expression of SYK is also up-regulated with metabolic steatohepatitis and correlates with liver macrophages in biopsy-proven MAFLD patients. CONCLUSIONS Collectively, these data suggest an important role for the SYK-3BP2 pathway in the pathogenesis of chronic liver inflammatory diseases and highlight its targeting in hepatocytes and myeloid cells as a potential strategy to treat metabolic steatohepatitis.
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Affiliation(s)
- Carmelo Luci
- Université Côte d’Azur, INSERM, U1065, C3M, Nice, France
| | - Elodie Vieira
- Université Côte d’Azur, INSERM, U1065, C3M, Nice, France
| | - Manon Bourinet
- Université Côte d’Azur, INSERM, U1065, C3M, Nice, France
| | | | | | | | - Lauren Lefevre
- Université Côte d’Azur, INSERM, U1065, C3M, Nice, France
| | | | | | | | - Albert Tran
- Université Côte d’Azur, CHU, INSERM, U1065, C3M, Nice, France
| | - Rodolphe Anty
- Université Côte d’Azur, CHU, INSERM, U1065, C3M, Nice, France
| | | | - Marcel Deckert
- Université Côte d’Azur, INSERM, U1065, C3M, Nice, France,Marcel Deckert, PhD, Inserm UMR1065/C3M, Bâtiment Universitaire ARCHIMED, Team "Microenvironment, signaling and cancer", 151 route Saint Antoine de Ginestière, BP 2 3194, 06204 Nice, France.
| | - Philippe Gual
- Université Côte d’Azur, INSERM, U1065, C3M, Nice, France,Correspondence Address correspondence to: Philippe Gual, PhD, Inserm UMR1065/C3M, Bâtiment Universitaire ARCHIMED, Team "Chronic liver diseases associated with obesity and alcohol", 151 route Saint Antoine de Ginestière, BP 2 3194, 06204 Nice, France. fax: +33 4 89 06 42 60.
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Deckert M, Prod'Homme V. [SH3BP2 heterozygous mutation amplifies macrophage inflammatory responses to infection in a mouse model of cherubism]. Med Sci (Paris) 2015; 31:589-91. [PMID: 26152156 DOI: 10.1051/medsci/20153106005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Marcel Deckert
- Centre méditerranéen de médecine moléculaire (C3M), Inserm, U1065, équipe microenvironnement, signalisation et cancer, bâtiment universitaire ARCHIMED, 151, route Saint Antoine de Ginestière, 06204 Nice Cedex 03, France - Université de Nice Sophia Antipolis, faculté de médecine, laboratoire d'excellence Signalife, 06103 Nice, France
| | - Virginie Prod'Homme
- Centre méditerranéen de médecine moléculaire (C3M), Inserm, U1065, équipe microenvironnement, signalisation et cancer, bâtiment universitaire ARCHIMED, 151, route Saint Antoine de Ginestière, 06204 Nice Cedex 03, France - Université de Nice Sophia Antipolis, faculté de médecine, laboratoire d'excellence Signalife, 06103 Nice, France
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Levaot N, Voytyuk O, Dimitriou I, Sircoulomb F, Chandrakumar A, Deckert M, Krzyzanowski PM, Scotter A, Gu S, Janmohamed S, Cong F, Simoncic PD, Ueki Y, La Rose J, Rottapel R. Loss of Tankyrase-mediated destruction of 3BP2 is the underlying pathogenic mechanism of cherubism. Cell 2012; 147:1324-39. [PMID: 22153076 DOI: 10.1016/j.cell.2011.10.045] [Citation(s) in RCA: 145] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2010] [Revised: 04/04/2011] [Accepted: 10/18/2011] [Indexed: 11/15/2022]
Abstract
Cherubism is an autosomal-dominant syndrome characterized by inflammatory destructive bony lesions resulting in symmetrical deformities of the facial bones. Cherubism is caused by mutations in Sh3bp2, the gene that encodes the adaptor protein 3BP2. Most identified mutations in 3BP2 lie within the peptide sequence RSPPDG. A mouse model of cherubism develops hyperactive bone-remodeling osteoclasts and systemic inflammation characterized by expansion of the myelomonocytic lineage. The mechanism by which cherubism mutations alter 3BP2 function has remained obscure. Here we show that Tankyrase, a member of the poly(ADP-ribose)polymerase (PARP) family, regulates 3BP2 stability through ADP-ribosylation and subsequent ubiquitylation by the E3-ubiquitin ligase RNF146 in osteoclasts. Cherubism mutations uncouple 3BP2 from Tankyrase-mediated protein destruction, which results in its stabilization and subsequent hyperactivation of the SRC, SYK, and VAV signaling pathways.
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Affiliation(s)
- Noam Levaot
- Ontario Cancer Institute and the Campbell Family Cancer Research Institute, 101 College Street, Rm 8-703, Toronto Medical Discovery Tower, University of Toronto, Toronto, Ontario M5G 1L7, Canada
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