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Maussion G, Rocha C, Abdian N, Yang D, Turk J, Carrillo Valenzuela D, Pimentel L, You Z, Morquette B, Nicouleau M, Deneault E, Higgins S, Chen CXQ, Reintsch WE, Ho S, Soubannier V, Lépine S, Modrusan Z, Lund J, Stephenson W, Schubert R, Durcan TM. Transcriptional Dysregulation and Impaired Neuronal Activity in FMR1 Knock-Out and Fragile X Patients' iPSC-Derived Models. Int J Mol Sci 2023; 24:14926. [PMID: 37834379 PMCID: PMC10573568 DOI: 10.3390/ijms241914926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/26/2023] [Accepted: 09/29/2023] [Indexed: 10/15/2023] Open
Abstract
Fragile X syndrome (FXS) is caused by a repression of the FMR1 gene that codes the Fragile X mental retardation protein (FMRP), an RNA binding protein involved in processes that are crucial for proper brain development. To better understand the consequences of the absence of FMRP, we analyzed gene expression profiles and activities of cortical neural progenitor cells (NPCs) and neurons obtained from FXS patients' induced pluripotent stem cells (IPSCs) and IPSC-derived cells from FMR1 knock-out engineered using CRISPR-CAS9 technology. Multielectrode array recordings revealed in FMR1 KO and FXS patient cells, decreased mean firing rates; activities blocked by tetrodotoxin application. Increased expression of presynaptic mRNA and transcription factors involved in the forebrain specification and decreased levels of mRNA coding AMPA and NMDA subunits were observed using RNA sequencing on FMR1 KO neurons and validated using quantitative PCR in both models. Intriguingly, 40% of the differentially expressed genes were commonly deregulated between NPCs and differentiating neurons with significant enrichments in FMRP targets and autism-related genes found amongst downregulated genes. Our findings suggest that the absence of FMRP affects transcriptional profiles since the NPC stage, and leads to impaired activity and neuronal differentiation over time, which illustrates the critical role of FMRP protein in neuronal development.
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Affiliation(s)
- Gilles Maussion
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Cecilia Rocha
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Narges Abdian
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Dimitri Yang
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Julien Turk
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Dulce Carrillo Valenzuela
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Luisa Pimentel
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Zhipeng You
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Barbara Morquette
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Michael Nicouleau
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Eric Deneault
- Regulatory Research Division, Centre for Oncology, Radiopharmaceuticals and Research, Biologic and Radiopharmaceutical Drugs Directorate, Health Products and Food Branch, Health Canada, Ottawa, ON K1A 0K9, Canada
| | - Samuel Higgins
- Roche Sequencing, Computational Science and Informatics, Roche Molecular Systems, Santa Clara, CA 95050, USA
| | - Carol X.-Q. Chen
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Wolfgang E. Reintsch
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Stanley Ho
- Research and Early Development, Roche Molecular Systems, Pleasanton, CA 94588, USA
| | - Vincent Soubannier
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
| | - Sarah Lépine
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
- Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H3G 2M1, Canada
| | | | | | | | - Rajib Schubert
- Research and Early Development, Roche Molecular Systems, Pleasanton, CA 94588, USA
| | - Thomas M. Durcan
- The Neuro’s Early Drug Discovery Unit (EDDU), McGill University, Montreal, QC H3A 2B4, Canada; (G.M.); (C.R.)
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Morquette B, Juźwik CA, Drake SS, Charabati M, Zhang Y, Lécuyer MA, Galloway DA, Dumas A, de Faria Junior O, Paradis-Isler N, Bueno M, Rambaldi I, Zandee S, Moore C, Bar-Or A, Vallières L, Prat A, Fournier AE. MicroRNA-223 protects neurons from degeneration in experimental autoimmune encephalomyelitis. Brain 2019; 142:2979-2995. [DOI: 10.1093/brain/awz245] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 05/27/2019] [Accepted: 06/19/2019] [Indexed: 12/13/2022] Open
Abstract
Dysregulation of miRNAs has been observed in many neurodegenerative diseases, including multiple sclerosis. Morquette et al. show that overexpression of miR-223-3p prevents accumulation of axonal damage in a rodent model of multiple sclerosis, in part through regulation of glutamate receptor signalling. Manipulation of miRNA levels may have therapeutic potential.
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Affiliation(s)
- Barbara Morquette
- McGill University - Montréal Neurological Institute, Montréal, QC, Canada
| | - Camille A Juźwik
- McGill University - Montréal Neurological Institute, Montréal, QC, Canada
| | - Sienna S Drake
- McGill University - Montréal Neurological Institute, Montréal, QC, Canada
| | - Marc Charabati
- CHUM research centre - Université de Montreal, Montréal, QC, Canada
| | - Yang Zhang
- McGill University - Montréal Neurological Institute, Montréal, QC, Canada
| | | | - Dylan A Galloway
- Division of BioMedical Sciences Faculty of Medicine, Memorial University of Newfoundland, St John's, NL, Canada
| | - Aline Dumas
- Neuroscience Unit, University Hospital Centre of Québec - Laval University, Québec City, QC, Canada
| | | | | | - Mardja Bueno
- McGill University - Montréal Neurological Institute, Montréal, QC, Canada
| | - Isabel Rambaldi
- McGill University - Montréal Neurological Institute, Montréal, QC, Canada
| | - Stephanie Zandee
- CHUM research centre - Université de Montreal, Montréal, QC, Canada
| | - Craig Moore
- Division of BioMedical Sciences Faculty of Medicine, Memorial University of Newfoundland, St John's, NL, Canada
| | - Amit Bar-Or
- McGill University - Montréal Neurological Institute, Montréal, QC, Canada
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Luc Vallières
- Neuroscience Unit, University Hospital Centre of Québec - Laval University, Québec City, QC, Canada
| | - Alexandre Prat
- CHUM research centre - Université de Montreal, Montréal, QC, Canada
| | - Alyson E Fournier
- McGill University - Montréal Neurological Institute, Montréal, QC, Canada
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Juźwik CA, S Drake S, Zhang Y, Paradis-Isler N, Sylvester A, Amar-Zifkin A, Douglas C, Morquette B, Moore CS, Fournier AE. microRNA dysregulation in neurodegenerative diseases: A systematic review. Prog Neurobiol 2019; 182:101664. [PMID: 31356849 DOI: 10.1016/j.pneurobio.2019.101664] [Citation(s) in RCA: 244] [Impact Index Per Article: 48.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 05/15/2019] [Accepted: 07/18/2019] [Indexed: 12/15/2022]
Abstract
While the root causes for individual neurodegenerative diseases are distinct, many shared pathological features and mechanisms contribute to neurodegeneration across diseases. Altered levels of microRNAs, small non-coding RNAs involved in post transcriptional regulation of gene expression, are reported for numerous neurodegenerative diseases. Yet, comparison between diseases to uncover commonly dysregulated microRNAs during neurodegeneration in general is lagging. We performed a systematic review of peer-reviewed publications describing differential microRNA expression in neurodegenerative diseases and related animal models. We compiled the results from studies covering the prevalent neurodegenerative diseases in the literature: Alzheimer's disease, amyotrophic lateral sclerosis, age-related macular degeneration, ataxia, dementia, myotonic dystrophy, epilepsy, glaucoma, Huntington's disease, multiple sclerosis, Parkinson's disease, and prion disorders. MicroRNAs which were dysregulated most often in these diseases and their models included miR-9-5p, miR-21-5p, the miR-29 family, miR-132-3p, miR-124-3p, miR-146a-5p, miR-155-5p, and miR-223-3p. Common pathways targeted by these predominant miRNAs were identified and revealed great functional overlap across diseases. We also identified a strong role for each microRNA in both the neural and immune components of diseases. microRNAs regulate broad networks of genes and identifying microRNAs commonly dysregulated across neurodegenerative diseases could cultivate novel hypotheses related to common molecular mechanisms underlying neurodegeneration.
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Affiliation(s)
- Camille A Juźwik
- McGill University, Montréal Neurological Institute, 3801 University Street, room BT-109, Montréal, QC, H3A 2B4, Canada.
| | - Sienna S Drake
- McGill University, Montréal Neurological Institute, 3801 University Street, room BT-109, Montréal, QC, H3A 2B4, Canada.
| | - Yang Zhang
- McGill University, Montréal Neurological Institute, 3801 University Street, room BT-109, Montréal, QC, H3A 2B4, Canada.
| | - Nicolas Paradis-Isler
- McGill University, Montréal Neurological Institute, 3801 University Street, room BT-109, Montréal, QC, H3A 2B4, Canada.
| | - Alexandra Sylvester
- McGill University, Montréal Neurological Institute, 3801 University Street, room BT-109, Montréal, QC, H3A 2B4, Canada.
| | - Alexandre Amar-Zifkin
- McGill University Health Centre- Medical Libraries, 3801 University Street, Montréal, QC, H3A 2B4, Canada.
| | - Chelsea Douglas
- Program Manager, Plotly Technologies Inc, 5555 Gaspe Avenue #118, Montréal, QC, H2T 2A3, Canada.
| | - Barbara Morquette
- McGill University, Montréal Neurological Institute, 3801 University Street, room BT-109, Montréal, QC, H3A 2B4, Canada.
| | - Craig S Moore
- Division of BioMedical Sciences Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada.
| | - Alyson E Fournier
- McGill University, Montréal Neurological Institute, 3801 University Street, room BT-109, Montréal, QC, H3A 2B4, Canada.
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Juźwik CA, Drake S, Lécuyer MA, Johnson RM, Morquette B, Zhang Y, Charabati M, Sagan SM, Bar-Or A, Prat A, Fournier AE. Neuronal microRNA regulation in Experimental Autoimmune Encephalomyelitis. Sci Rep 2018; 8:13437. [PMID: 30194392 PMCID: PMC6128870 DOI: 10.1038/s41598-018-31542-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 08/21/2018] [Indexed: 01/02/2023] Open
Abstract
Multiple sclerosis (MS) is an autoimmune, neurodegenerative disease but the molecular mechanisms underlying neurodegenerative aspects of the disease are poorly understood. microRNAs (miRNAs) are powerful regulators of gene expression that regulate numerous mRNAs simultaneously and can thus regulate programs of gene expression. Here, we describe miRNA expression in neurons captured from mice subjected to experimental autoimmune encephalomyelitis (EAE), a model of central nervous system (CNS) inflammation. Lumbar motor neurons and retinal neurons were laser captured from EAE mice and miRNA expression was assessed by next-generation sequencing and validated by qPCR. We describe 14 miRNAs that are differentially regulated in both neuronal subtypes and determine putative mRNA targets though in silico analysis. Several upregulated neuronal miRNAs are predicted to target pathways that could mediate repair and regeneration during EAE. This work identifies miRNAs that are affected by inflammation and suggests novel candidates that may be targeted to improve neuroprotection in the context of pathological inflammation.
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Affiliation(s)
- Camille A Juźwik
- McGill University, Montréal Neurological Institute, Montréal, QC, H3A 2B4, Canada
| | - Sienna Drake
- McGill University, Montréal Neurological Institute, Montréal, QC, H3A 2B4, Canada
| | - Marc-André Lécuyer
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Université de Montréal, Montréal, QC, H2X 0A9, Canada
| | - Radia Marie Johnson
- McGill University, Goodman Cancer Research Centre, Montréal, H3A 1A3, Canada
| | - Barbara Morquette
- McGill University, Montréal Neurological Institute, Montréal, QC, H3A 2B4, Canada
| | - Yang Zhang
- McGill University, Montréal Neurological Institute, Montréal, QC, H3A 2B4, Canada
| | - Marc Charabati
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Université de Montréal, Montréal, QC, H2X 0A9, Canada
| | - Selena M Sagan
- McGill University, Departments of Microbiology & Immunology and Biochemistry, Montréal, QC, H3G 0B1, Canada
| | - Amit Bar-Or
- McGill University, Montréal Neurological Institute, Montréal, QC, H3A 2B4, Canada
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Alexandre Prat
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Université de Montréal, Montréal, QC, H2X 0A9, Canada
| | - Alyson E Fournier
- McGill University, Montréal Neurological Institute, Montréal, QC, H3A 2B4, Canada.
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Kaplan A, Morquette B, Kroner A, Leong S, Madwar C, Sanz R, Banerjee SL, Antel J, Bisson N, David S, Fournier AE. Small-Molecule Stabilization of 14-3-3 Protein-Protein Interactions Stimulates Axon Regeneration. Neuron 2017; 93:1082-1093.e5. [PMID: 28279353 DOI: 10.1016/j.neuron.2017.02.018] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 01/11/2017] [Accepted: 02/07/2017] [Indexed: 12/19/2022]
Abstract
Damaged central nervous system (CNS) neurons have a poor ability to spontaneously regenerate, causing persistent functional deficits after injury. Therapies that stimulate axon growth are needed to repair CNS damage. 14-3-3 adaptors are hub proteins that are attractive targets to manipulate cell signaling. We identify a positive role for 14-3-3s in axon growth and uncover a developmental regulation of the phosphorylation and function of 14-3-3s. We show that fusicoccin-A (FC-A), a small-molecule stabilizer of 14-3-3 protein-protein interactions, stimulates axon growth in vitro and regeneration in vivo. We show that FC-A stabilizes a complex between 14-3-3 and the stress response regulator GCN1, inducing GCN1 turnover and neurite outgrowth. These findings show that 14-3-3 adaptor protein complexes are druggable targets and identify a new class of small molecules that may be further optimized for the repair of CNS damage.
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Affiliation(s)
- Andrew Kaplan
- Department of Neurology and Neurosurgery, Montréal Neurological Institute, McGill University, Montréal, QC H3A 2B4, Canada
| | - Barbara Morquette
- Department of Neurology and Neurosurgery, Montréal Neurological Institute, McGill University, Montréal, QC H3A 2B4, Canada
| | - Antje Kroner
- Department of Neurosurgery, Medical College of Wisconsin, VA Medical Center, Milwaukee, WI 53295, USA; Centre for Research in Neuroscience, The Research Institute of the McGill University Health Centre, Montréal, QC H3G 1A4, Canada
| | - SooYuen Leong
- Department of Neurology and Neurosurgery, Montréal Neurological Institute, McGill University, Montréal, QC H3A 2B4, Canada
| | - Carolin Madwar
- Department of Chemistry, McGill University, Montréal, QC H3A 0B8, Canada
| | - Ricardo Sanz
- Department of Neurology and Neurosurgery, Montréal Neurological Institute, McGill University, Montréal, QC H3A 2B4, Canada
| | - Sara L Banerjee
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, and Centre de Recherche sur le Cancer, Université Laval, Québec City, QC G1V 0A6, Canada
| | - Jack Antel
- Department of Neurology and Neurosurgery, Montréal Neurological Institute, McGill University, Montréal, QC H3A 2B4, Canada
| | - Nicolas Bisson
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, and Centre de Recherche sur le Cancer, Université Laval, Québec City, QC G1V 0A6, Canada
| | - Samuel David
- Centre for Research in Neuroscience, The Research Institute of the McGill University Health Centre, Montréal, QC H3G 1A4, Canada
| | - Alyson E Fournier
- Department of Neurology and Neurosurgery, Montréal Neurological Institute, McGill University, Montréal, QC H3A 2B4, Canada.
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Morquette B, Morquette P, Agostinone J, Feinstein E, McKinney RA, Kolta A, Di Polo A. REDD2-mediated inhibition of mTOR promotes dendrite retraction induced by axonal injury. Cell Death Differ 2014; 22:612-25. [PMID: 25257176 PMCID: PMC4572858 DOI: 10.1038/cdd.2014.149] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 08/07/2014] [Accepted: 08/18/2014] [Indexed: 12/30/2022] Open
Abstract
Dendritic defects occur in neurodegenerative diseases accompanied by axonopathy, yet the mechanisms that regulate these pathologic changes are poorly understood. Using Thy1-YFPH mice subjected to optic nerve axotomy, we demonstrate early retraction of retinal ganglion cell (RGC) dendrites and selective loss of mammalian target of rapamycin (mTOR) activity, which precede soma loss. Axonal injury triggered rapid upregulation of the stress-induced protein REDD2 (regulated in development and DNA damage response 2), a potent inhibitor of mTOR. Short interfering RNA-mediated REDD2 knockdown restored mTOR activity and rescued dendritic length, area and branch complexity in a rapamycin-dependent manner. Whole-cell recordings demonstrated that REDD2 depletion leading to mTOR activation in RGCs restored their light response properties. Lastly, we show that REDD2-dependent mTOR activity extended RGC survival following axonal damage. These results indicate that injury-induced stress leads to REDD2 upregulation, mTOR inhibition and dendrite pathology causing neuronal dysfunction and subsequent cell death.
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Affiliation(s)
- B Morquette
- 1] Department of Neuroscience, CHUM Research Center, University of Montreal, Montreal, QC, Canada [2] University of Montreal Hospital Research Center (CR-CHUM), Montreal, QC, Canada [3] Groupe de Recherche sur le Système Nerveux Central (GRSNC), University of Montreal, Montreal, QC, Canada
| | - P Morquette
- 1] Department of Neuroscience, CHUM Research Center, University of Montreal, Montreal, QC, Canada [2] Groupe de Recherche sur le Système Nerveux Central (GRSNC), University of Montreal, Montreal, QC, Canada
| | - J Agostinone
- 1] Department of Neuroscience, CHUM Research Center, University of Montreal, Montreal, QC, Canada [2] University of Montreal Hospital Research Center (CR-CHUM), Montreal, QC, Canada [3] Groupe de Recherche sur le Système Nerveux Central (GRSNC), University of Montreal, Montreal, QC, Canada
| | - E Feinstein
- Quark Pharmaceuticals Inc., Research Division, Ness Ziona, Israel
| | - R A McKinney
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada
| | - A Kolta
- 1] Department of Neuroscience, CHUM Research Center, University of Montreal, Montreal, QC, Canada [2] Groupe de Recherche sur le Système Nerveux Central (GRSNC), University of Montreal, Montreal, QC, Canada [3] Department of Stomatology, Faculty of Dentistry, University of Montreal, Montreal, QC, Canada
| | - A Di Polo
- 1] Department of Neuroscience, CHUM Research Center, University of Montreal, Montreal, QC, Canada [2] University of Montreal Hospital Research Center (CR-CHUM), Montreal, QC, Canada [3] Groupe de Recherche sur le Système Nerveux Central (GRSNC), University of Montreal, Montreal, QC, Canada
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Vaillancourt F, Morquette B, Shi Q, Fahmi H, Lavigne P, Di Battista JA, Fernandes JC, Benderdour M. Differential regulation of cyclooxygenase-2 and inducible nitric oxide synthase by 4-hydroxynonenal in human osteoarthritic chondrocytes through ATF-2/CREB-1 transactivation and concomitant inhibition of NF-κB signaling cascade. J Cell Biochem 2007; 100:1217-31. [PMID: 17031850 DOI: 10.1002/jcb.21110] [Citation(s) in RCA: 233] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
4-hydroxynonenal (HNE), a lipid peroxidation end product, is produced abundantly in osteoarthritic (OA) articular tissues and was recently identified as a potent catabolic factor in OA cartilage. In this study, we provide additional evidence that HNE acts as an inflammatory mediator by elucidating the signaling cascades targeted in OA chondrocytes leading to cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) gene expression. HNE induced COX-2 protein and mRNA levels with accompanying increases in prostaglandin E2 (PGE(2)) production. In contrast, HNE had no effect on basal iNOS expression or nitric oxide (NO) release. However, HNE strongly inhibited IL-1beta-induced iNOS or NO production. Transient transfection experiments revealed that the ATF/CRE site (-58/-53) is essential for HNE-induced COX-2 promoter activation and indeed HNE induced ATF-2 and CREB-1 phosphorylation as well as ATF/CRE binding activity. Overexpression of p38 MAPK enhanced the HNE-induced ATF/CRE luciferase reporter plasmid activation, COX-2 synthesis and promoter activity. HNE abrogated IL-1beta-induced iNOS expression and promoter activity mainly through NF-kappaB site (-5,817/-5,808) possibly via suppression of IKKalpha-induced IkappaBalpha phosphorylation and NF-kappaB/p65 nuclear translocation. Upon examination of upstream signaling components, we found that IKKalpha was inactivated through HNE/IKKalpha adduct formation. Taken together, these findings illustrate the central role played by HNE in the regulation of COX-2 and iNOS in OA. The aldehyde induced selectively COX-2 expression via ATF/CRE activation and inhibited iNOS via IKKalpha inactivation.
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Affiliation(s)
- France Vaillancourt
- Orthopaedic Research Laboratory, Sacre-Coeur Hospital, University of Montreal, Montreal, Quebec, Canada
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Morquette B, Shi Q, Lavigne P, Ranger P, Fernandes JC, Benderdour M. Production of lipid peroxidation products in osteoarthritic tissues: new evidence linking 4-hydroxynonenal to cartilage degradation. ACTA ACUST UNITED AC 2006; 54:271-81. [PMID: 16385544 DOI: 10.1002/art.21559] [Citation(s) in RCA: 251] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE The lipid peroxidation product 4-hydroxynonenal (HNE) is prominently produced in osteoarthritic (OA) synovial cells, but its specific contribution to cartilage destruction is not understood. This study was designed to test whether HNE signaling and binding are involved in OA cartilage degradation through type II collagen (CII) and matrix metalloproteinase 13 (MMP-13) modulation. METHODS HNE levels in synovial fluid and in isolated OA chondrocytes treated with free radical donors were determined by enzyme-linked immunosorbent assay. The formation of the HNE/CII adducts was measured in cartilage explants by immunoprecipitation. Levels of CII and MMP-13 messenger RNA and protein were determined by reverse transcription-polymerase chain reaction, Western blotting, and by the use of commercial kits. RESULTS Levels of HNE/protein adducts were higher in OA synovial fluid compared with normal synovial fluid and were higher in OA chondrocytes treated with free radical donors compared with untreated cells. In cartilage explants, HNE induced CII cleavage, as established by the generation of neoepitopes. The level of HNE/CII adducts was increased in OA cartilage explants incubated with free radical donors. Modification of CII by HNE accelerated its degradation by active MMP-13. In isolated OA chondrocytes, HNE inhibited the expression of CII and tissue inhibitor of metalloproteinases 1 and induced MMP-13 mainly through activation of p38 MAPK. In vitro, HNE binding to MMP-13 activated this enzyme at a molar ratio of 1:100 (MMP-13 to HNE). CONCLUSION The increased level of HNE in OA cartilage and the ability of HNE to induce transcriptional and posttranslational modifications of CII and MMP-13 suggest that this aldehyde could play a role in OA.
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Affiliation(s)
- Barbara Morquette
- Orthopedic Research Labotatory, Sacre-Coeur Hospital, Porte K-3045, University of Montreal, 5400 Boulevard Gouin West, Montreal, Quebec H4J 1C5, Canada
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Morquette B, Shi Q, Lavigne P, Fernandes J, Benderdour M. Lipid Peroxidation End-Products as Modulators of Catabolic and Inflammatory Responses in Arthritis: A Review. Curr Rheumatol Rev 2005. [DOI: 10.2174/157339705774612283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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