title: Activation of the NLRP3 Inflammasome Is Associated with Valosin-Containing Protein Myopathy.
abstract: Aberrant activation of the NOD-like receptor (NLR) family, pyrin domain-containing protein 3 (NLRP3) inflammasome, triggers a pathogenic inflammatory response in many inherited neurodegenerative disorders. Inflammation has recently been associated with valosin-containing protein (VCP)-associated diseases, caused by missense mutations in the VCP gene. This prompted us to investigate whether NLRP3 inflammasome plays a role in VCP-associated diseases, which classically affects the muscles, bones, and brain. In this report, we demonstrate (i) an elevated activation of the NLRP3 inflammasome in VCP myoblasts, derived from induced pluripotent stem cells (iPSCs) of VCP patients, which was significantly decreased following in vitro treatment with the MCC950, a potent and specific inhibitor of NLRP3 inflammasome; (ii) a significant increase in the expression of NLRP3, caspase 1, IL-1β, and IL-18 in the quadriceps muscles of VCPR155H/+heterozygote mice, an experimental mouse model that has many clinical features of human VCP-associated myopathy; (iii) a significant increase of number of IL-1β(+)F4/80(+)Ly6C(+)inflammatory macrophages that infiltrate the muscles of VCPR155H/+mice; (iv) NLRP3 inflammasome activation and accumulation IL-1β(+)F4/80(+)Ly6C(+)macrophages positively correlated with high expression of TDP-43 and p62/SQSTM1 markers of VCP pathology in damaged muscle; and (v) treatment of VCPR155H/+mice with MCC950 inhibitor suppressed activation of NLRP3 inflammasome, reduced the F4/80(+)Ly6C(+)IL-1β(+)macrophage infiltrates in the muscle, and significantly ameliorated muscle strength. Together, these results suggest that (i) NLRP3 inflammasome and local IL-1β(+)F4/80(+)Ly6C(+)inflammatory macrophages contribute to pathogenesis of VCP-associated myopathy and (ii) identified MCC950 specific inhibitor of the NLRP3 inflammasome with promising therapeutic potential for the treatment of VCP-associated myopathy.
authors.affiliation: Laboratory of Cellular and Molecular Immunology, Gavin Herbert Institute, School of Medicine, University of California Irvine, Irvine, CA, 92697, USA. a.nalbandian@uci.edu.|Division of Genetics and Genomics Medicine, Department of Pediatrics, University of California Irvine, Irvine, CA, 92697, USA. a.nalbandian@uci.edu.|Division of Genetics and Metabolism, Department of Pediatrics, University of California Irvine, Irvine, CA, USA. a.nalbandian@uci.edu.
authors.forename: Angèle
authors.initials: A
authors.lastname: Nalbandian
authors.affiliation: Laboratory of Cellular and Molecular Immunology, Gavin Herbert Institute, School of Medicine, University of California Irvine, Irvine, CA, 92697, USA.
authors.forename: Arif A
authors.initials: AA
authors.lastname: Khan
authors.affiliation: Laboratory of Cellular and Molecular Immunology, Gavin Herbert Institute, School of Medicine, University of California Irvine, Irvine, CA, 92697, USA.
authors.forename: Ruchi
authors.initials: R
authors.lastname: Srivastava
authors.affiliation: Division of Genetics and Genomics Medicine, Department of Pediatrics, University of California Irvine, Irvine, CA, 92697, USA.
authors.forename: Katrina J
authors.initials: KJ
authors.lastname: Llewellyn
authors.affiliation: Division of Genetics and Genomics Medicine, Department of Pediatrics, University of California Irvine, Irvine, CA, 92697, USA.
authors.forename: Baichang
authors.initials: B
authors.lastname: Tan
authors.affiliation: Laboratory of Cellular and Molecular Immunology, Gavin Herbert Institute, School of Medicine, University of California Irvine, Irvine, CA, 92697, USA.
authors.forename: Nora
authors.initials: N
authors.lastname: Shukr
authors.affiliation: Laboratory of Cellular and Molecular Immunology, Gavin Herbert Institute, School of Medicine, University of California Irvine, Irvine, CA, 92697, USA.
authors.forename: Yasmin
authors.initials: Y
authors.lastname: Fazli
authors.affiliation: Division of Genetics and Genomics Medicine, Department of Pediatrics, University of California Irvine, Irvine, CA, 92697, USA.
authors.forename: Virginia E
authors.initials: VE
authors.lastname: Kimonis
authors.affiliation: Laboratory of Cellular and Molecular Immunology, Gavin Herbert Institute, School of Medicine, University of California Irvine, Irvine, CA, 92697, USA. lbenmoha@uci.edu.|Department of Molecular Biology and Biochemistry, School of Medicine, University of California Irvine, Irvine, CA, 92697, USA. lbenmoha@uci.edu.|Institute for Immunology, School of Medicine, University of California Irvine, Irvine, CA, 92697, USA. lbenmoha@uci.edu.
authors.forename: Lbachir
authors.initials: L
authors.lastname: BenMohamed
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000818:Animals; D018797:Cell Cycle Proteins / Q000378:metabolism*; D002478:Cells, Cultured; D004195:Disease Models, Animal; D005663:Furans; D006576:Heterocyclic Compounds, 4 or More Rings / Q000494:pharmacology; D006801:Humans; D007192:Indenes; D058847:Inflammasomes / Q000037:antagonists & inhibitors / Q000378:metabolism*; D007249:Inflammation; D008264:Macrophages; D051379:Mice; D009135:Muscular Diseases / Q000188:drug therapy / Q000209:etiology* / Q000378:metabolism; D000071199:NLR Family, Pyrin Domain-Containing 3 Protein / Q000378:metabolism*; D052097:Quadriceps Muscle / Q000378:metabolism; D013449:Sulfonamides; D013450:Sulfones / Q000494:pharmacology; D000074405:Valosin Containing Protein
chemical_list: D018797:Cell Cycle Proteins; D005663:Furans; D006576:Heterocyclic Compounds, 4 or More Rings; D007192:Indenes; D058847:Inflammasomes; D000071199:NLR Family, Pyrin Domain-Containing 3 Protein; C492716:Nlrp3 protein, mouse; D013449:Sulfonamides; D013450:Sulfones; C000597426:N-(1,2,3,5,6,7-hexahydro-S-indacen-4-ylcarbamoyl)-4-(2-hydroxy-2-propanyl)-2-furansulfonamide; D000251:Adenosine Triphosphatases; C000614178:VCP protein, human; D000074405:Valosin Containing Protein; C000614179:Vcp protein, mouse
keywords: NLRP3 inflammasome; macrophage; myopathy; valosin-containing protein