1
|
Li X, Martinez-Ramos S, Heedge FT, Pitsillides A, Bou-Gharios G, Poulet B, Chenu C. Expression of semaphorin-3A in the joint and role in osteoarthritis. Cell Biochem Funct 2024; 42:e4012. [PMID: 38584583 DOI: 10.1002/cbf.4012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 03/26/2024] [Accepted: 03/31/2024] [Indexed: 04/09/2024]
Abstract
Osteoarthritis (OA) is characterised by the deterioration of cartilage in the joints and pain. We hypothesise that semaphorin-3A (sema-3A), a chemorepellent for sensory nerves, plays a role in joint degradation and pain. We used the mechanical joint loading (MJL) model of OA to investigate sema-3A expression in the joint and examine its association with the development of OA and pain. We also analyse its effect on chondrocyte differentiation using the ATDC5 cell line. We demonstrate that sema-3A is present in most tissues in the healthy joint and its expression increases in highly innervated tissues, such as cruciate ligaments, synovial lining and subchondral bone, in loaded compared to nonloaded control joints. In contrast, sema-3A expression in cartilage was decreased in the severe OA induced by the application of high loads. There was a significant increase in circulating sema-3A, 6 weeks after MJL compared to the nonloaded mice. mRNA for sema-3A and its receptor Plexin A1 were upregulated in the dorsal root ganglia of mice submitted to MJL. These increases were supressed by zoledronate, an inhibitor of bone pain. Sema-3A was expressed at all stages of Chondrocyte maturation and, when added exogenously, stimulated expression of markers of chondrocyte differentiation. This indicates that sema-3A could affect joint tissues distinctively during the development of OA. In highly innervated joint tissues, sema-3A could control innervation and/or induce pain-associated neuronal changes. In cartilage, sema-3A could favour its degeneration by modifying chondrocyte differentiation.
Collapse
Affiliation(s)
- Xiang Li
- Department of Comparative Biomedical Sciences, Royal Veterinary College, London, UK
| | - Sara Martinez-Ramos
- Rheumatology & Immuno-Mediated Diseases Research Group (IRIDIS), Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, Vigo, Spain
| | - Freija T Heedge
- Department of Comparative Biomedical Sciences, Royal Veterinary College, London, UK
| | - Andrew Pitsillides
- Department of Comparative Biomedical Sciences, Royal Veterinary College, London, UK
| | - George Bou-Gharios
- Musculoskeletal and Ageing Sciences Department, Institute of Lifecourse and Medical Science, University of Liverpool, Liverpool, UK
| | - Blandine Poulet
- Musculoskeletal and Ageing Sciences Department, Institute of Lifecourse and Medical Science, University of Liverpool, Liverpool, UK
| | - Chantal Chenu
- Department of Comparative Biomedical Sciences, Royal Veterinary College, London, UK
| |
Collapse
|
2
|
Gordon C, Trainor J, Shah RJ, Studholme K, Gelman A, Doswell F, Sadar F, Giovannetti A, Gershenson J, Khan A, Nicholson J, Huang Z, Spurgat M, Tang SJ, Wang H, Ojima I, Carlson D, Komatsu DE, Kaczocha M. Fatty acid binding protein 5 inhibition attenuates pronociceptive cytokine/chemokine expression and suppresses osteoarthritis pain: A comparative human and rat study. Osteoarthritis Cartilage 2024; 32:266-280. [PMID: 38035977 PMCID: PMC11283882 DOI: 10.1016/j.joca.2023.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 10/20/2023] [Accepted: 11/02/2023] [Indexed: 12/02/2023]
Abstract
OBJECTIVE Osteoarthritis (OA) is often accompanied by debilitating pain that is refractory to available analgesics due in part to the complexity of signaling molecules that drive OA pain and our inability to target these in parallel. Fatty acid binding protein 5 (FABP5) is a lipid chaperone that regulates inflammatory pain; however, its contribution to OA pain has not been characterized. DESIGN This combined clinical and pre-clinical study utilized synovial tissues obtained from subjects with end-stage OA and rats with monoiodoacetate-induced OA. Cytokine and chemokine release from human synovia incubated with a selective FABP5 inhibitor was profiled with cytokine arrays and ELISA. Immunohistochemical analyses were conducted for FABP5 in human and rat synovium. The efficacy of FABP5 inhibitors on pain was assessed in OA rats using incapacitance as an outcome. RNA-seq was then performed to characterize the transcriptomic landscape of synovial gene expression in OA rats treated with FABP5 inhibitor or vehicle. RESULTS FABP5 was expressed in human synovium and FABP5 inhibition reduced the secretion of pronociceptive cytokines (interleukin-6 [IL6], IL8) and chemokines (CCL2, CXCL1). In rats, FABP5 was upregulated in the OA synovium and its inhibition alleviated incapacitance. The transcriptome of the rat OA synovium exhibited >6000 differentially expressed genes, including the upregulation of numerous pronociceptive cytokines and chemokines. FABP5 inhibition blunted the upregulation of the majority of these pronociceptive mediators. CONCLUSIONS FABP5 is expressed in the OA synovium and its inhibition suppresses pronociceptive signaling and pain, indicating that FABP5 inhibitors may constitute a novel class of analgesics to treat OA.
Collapse
Affiliation(s)
- Chris Gordon
- Department of Anesthesiology, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - James Trainor
- Department of Anesthesiology, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Rohan J Shah
- Department of Anesthesiology, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Keith Studholme
- Department of Anesthesiology, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Alex Gelman
- Department of Anesthesiology, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Faniya Doswell
- Department of Anesthesiology, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Faisal Sadar
- Department of Orthopaedics and Rehabilitation, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Allessio Giovannetti
- Department of Anesthesiology, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Josh Gershenson
- Department of Anesthesiology, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Ayesha Khan
- Department of Anesthesiology, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - James Nicholson
- Department of Orthopaedics and Rehabilitation, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - ZeYu Huang
- Department of Orthopaedic Surgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, People's Republic of China
| | - Michael Spurgat
- Department of Anesthesiology, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Shao-Jun Tang
- Department of Anesthesiology, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA; Stony Brook University Pain and Analgesia Research Center (SPARC), Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Hehe Wang
- Department of Chemistry, Stony Brook University, Stony Brook, NY, USA
| | - Iwao Ojima
- Department of Chemistry, Stony Brook University, Stony Brook, NY, USA; Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, NY, USA
| | - David Carlson
- Genomics Core Facility and Institute for Advanced Computational Sciences, Stony Brook University, Stony Brook, NY, USA
| | - David E Komatsu
- Department of Orthopaedics and Rehabilitation, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA.
| | - Martin Kaczocha
- Department of Anesthesiology, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA; Stony Brook University Pain and Analgesia Research Center (SPARC), Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA; Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, NY, USA.
| |
Collapse
|
3
|
Martin Gil C, Raoof R, Versteeg S, Willemen HLDM, Lafeber FPJG, Mastbergen SC, Eijkelkamp N. Myostatin and CXCL11 promote nervous tissue macrophages to maintain osteoarthritis pain. Brain Behav Immun 2024; 116:203-215. [PMID: 38070625 DOI: 10.1016/j.bbi.2023.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 11/22/2023] [Accepted: 12/04/2023] [Indexed: 12/17/2023] Open
Abstract
Pain is the most debilitating symptom of knee osteoarthritis (OA) that can even persist after total knee replacement. The severity and duration of pain do not correlate well with joint tissue alterations, suggesting other mechanisms may drive pain persistence in OA. Previous work identified that macrophages accumulate in the dorsal root ganglia (DRG) containing the somas of sensory neurons innervating the injured knee joint in a mouse OA model and acquire a M1-like phenotype to maintain pain. Here we aimed to unravel the mechanisms that govern DRG macrophage accumulation and programming. The accumulation of F4/80+iNOS+ (M1-like) DRG macrophages was detectable at day 3 after mono-iodoacetate (MIA)-induced OA in the mouse. Depletion of macrophages prior to induction of OA resolved pain-like behaviors by day 7 without affecting the initial development of pain-like behaviors. Analysis of DRG transcript identified CXCL11 and myostatin. CXCL11 and myostatin were increased at 3 weeks post OA induction, with CXCL11 expression partially localized in satellite glial cells and myostatin in sensory neurons. Blocking CXCL11 or myostatin prevented the persistence of OA pain, without affecting the initiation of pain. CXCL11 neutralization reduced the number of total and F4/80+iNOS+ DRG macrophages, whilst myostatin inhibition diminished the programming of F4/80+iNOS+ DRG macrophages. Intrathecal injection of recombinant CXCL11 did not induce pain-associated behaviors. In contrast, intrathecal myostatin increased the number of F4/80+iNOS+ DRG macrophages concurrent with the development of mechanical hypersensitivity that was prevented by macrophages depletion or CXCL11 blockade. Finally, myostatin inhibition during established OA, resolved pain and F4/80+iNOS+ macrophage accumulation in the DRG. In conclusion, DRG macrophages maintain OA pain, but are not required for the induction of OA pain. Myostatin is a key ligand in neuro-immune communication that drives the persistence of pain in OA through nervous tissue macrophages and represent a novel therapeutic target for the treatment of OA pain.
Collapse
Affiliation(s)
- Christian Martin Gil
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Ramin Raoof
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Sabine Versteeg
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Hanneke L D M Willemen
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Floris P J G Lafeber
- Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands; Regenerative Medicine Center, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Simon C Mastbergen
- Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands; Regenerative Medicine Center, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | - Niels Eijkelkamp
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands.
| |
Collapse
|
4
|
Jiang Z, Cai X, Yao X, Zhang S, Lan W, Jin Z, Tang F, Ma W, Yao X, Chen C, Lan T. The causal effect of cytokine cycling levels on osteoarthritis: a bidirectional Mendelian randomized study. Front Immunol 2024; 14:1334361. [PMID: 38274820 PMCID: PMC10808687 DOI: 10.3389/fimmu.2023.1334361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 12/27/2023] [Indexed: 01/27/2024] Open
Abstract
Objective Osteoarthritis (OA) is the most prevalent joint disease globally, serving as a primary cause of pain and disability. However, the pathological processes underlying OA remain incompletely understood. Several studies have noted an association between cytokines and OA, yet the causal link between them remains ambiguous. This study aims to identify cytokines potentially causally related to OA using Mendelian randomization (MR) analysis, informing early clinical diagnosis and treatment decisions. Methods We conducted a genome-wide association study (GWAS) on 12 OA traits involving 177,517 cases and 649,173 controls from 9 international cohorts. For discovery MR analysis, we used 103 cytokines from two European populations as instrumental variables (IVs). Concurrently, another European population OA GWAS database (36,185 cases and 135,185 controls) was used to replicate MR analysis, employing the inverse variance weighted (IVW) method as the primary analytic approach. Additional methods tested included MR Egger, Weighted median, and Weighted mode. We merged the MR findings through meta-analysis. Heterogeneity testing, level pleiotropy testing (MR Egger intercept test and MRPRESSO), and sensitivity analysis via Leave One Out (LOO) were conducted to verify result robustness. Lastly, reverse MR analysis was performed. Results The meta-analysis merger revealed a correlation between CX3CL1 cycle levels and increased OA risk (OR=1.070, 95% CI: 1.040-1.110; P<0.010). We also observed associations between MCP4 (OR=0.930, 95% CI: 0.890-0.970; P<0.010) and CCL25 (OR=0.930, 95% CI: 0.890-0.970; P<0.010) with reduced OA risk. The sensitivity analysis results corroborate the robustness of these findings. Conclusion Our MR analysis indicates a potential causal relationship between CX3CL1, MCP4, CCL25, and OA risk changes. Further research is warranted to explore the influence of cytokines on OA development.
Collapse
Affiliation(s)
- Zong Jiang
- Second Clinical Medical College, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Xin Cai
- Department of Rheumatology and Immunology, The First People's Hospital Of Guiyang, Guiyang, China
| | - Xiaoling Yao
- Second Clinical Medical College, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Shaoqin Zhang
- Department of Rheumatology and Immunology, The First People's Hospital Of Guiyang, Guiyang, China
| | - Weiya Lan
- Second Clinical Medical College, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Zexu Jin
- Department of Rheumatology and Immunology, The First People's Hospital Of Guiyang, Guiyang, China
| | - Fang Tang
- Department of Rheumatology and Immunology, The Second Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Wukai Ma
- Department of Rheumatology and Immunology, The Second Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Xueming Yao
- Department of Rheumatology and Immunology, The Second Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Changming Chen
- Department of Rheumatology and Immunology, The Second Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Tianzuo Lan
- Department of Rheumatology and Immunology, The First People's Hospital Of Guiyang, Guiyang, China
| |
Collapse
|
5
|
Vroman R, Hunter RS, Wood MJ, Davis OC, Malfait Z, George DS, Ren D, Tavares-Ferreira D, Price TJ, Miller RJ, Malfait AM, Malfait F, Miller RE, Syx D. Analysis of matrisome expression patterns in murine and human dorsal root ganglia. Front Mol Neurosci 2023; 16:1232447. [PMID: 37664243 PMCID: PMC10471487 DOI: 10.3389/fnmol.2023.1232447] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 07/27/2023] [Indexed: 09/05/2023] Open
Abstract
The extracellular matrix (ECM) is a dynamic structure of molecules that can be divided into six different categories and are collectively called the matrisome. The ECM plays pivotal roles in physiological processes in many tissues, including the nervous system. Intriguingly, alterations in ECM molecules/pathways are associated with painful human conditions and murine pain models. Nevertheless, mechanistic insight into the interplay of normal or defective ECM and pain is largely lacking. The goal of this study was to integrate bulk, single-cell, and spatial RNA sequencing (RNAseq) datasets to investigate the expression and cellular origin of matrisome genes in male and female murine and human dorsal root ganglia (DRG). Bulk RNAseq showed that about 65% of all matrisome genes were expressed in both murine and human DRG, with proportionally more core matrisome genes (glycoproteins, collagens, and proteoglycans) expressed compared to matrisome-associated genes (ECM-affiliated genes, ECM regulators, and secreted factors). Single cell RNAseq on male murine DRG revealed the cellular origin of matrisome expression. Core matrisome genes, especially collagens, were expressed by fibroblasts whereas matrisome-associated genes were primarily expressed by neurons. Cell-cell communication network analysis with CellChat software predicted an important role for collagen signaling pathways in connecting vascular cell types and nociceptors in murine tissue, which we confirmed by analysis of spatial transcriptomic data from human DRG. RNAscope in situ hybridization and immunohistochemistry demonstrated expression of collagens in fibroblasts surrounding nociceptors in male and female human DRG. Finally, comparing human neuropathic pain samples with non-pain samples also showed differential expression of matrisome genes produced by both fibroblasts and by nociceptors. This study supports the idea that the DRG matrisome may contribute to neuronal signaling in both mouse and human, and that dysregulation of matrisome genes is associated with neuropathic pain.
Collapse
Affiliation(s)
- Robin Vroman
- Department of Biomolecular Medicine, Center for Medical Genetics, Ghent University, Ghent, Belgium
| | - Rahel S. Hunter
- Department of Internal Medicine, Division of Rheumatology, Rush University Medical Center, Chicago, IL, United States
| | - Matthew J. Wood
- Department of Internal Medicine, Division of Rheumatology, Rush University Medical Center, Chicago, IL, United States
| | - Olivia C. Davis
- Department of Neuroscience and Center for Advanced Pain Studies, University of Texas at Dallas, Richardson, TX, United States
| | - Zoë Malfait
- Department of Biomolecular Medicine, Center for Medical Genetics, Ghent University, Ghent, Belgium
| | - Dale S. George
- Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Dongjun Ren
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Diana Tavares-Ferreira
- Department of Neuroscience and Center for Advanced Pain Studies, University of Texas at Dallas, Richardson, TX, United States
| | - Theodore J. Price
- Department of Neuroscience and Center for Advanced Pain Studies, University of Texas at Dallas, Richardson, TX, United States
| | - Richard J. Miller
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Anne-Marie Malfait
- Department of Internal Medicine, Division of Rheumatology, Rush University Medical Center, Chicago, IL, United States
| | - Fransiska Malfait
- Department of Biomolecular Medicine, Center for Medical Genetics, Ghent University, Ghent, Belgium
| | - Rachel E. Miller
- Department of Internal Medicine, Division of Rheumatology, Rush University Medical Center, Chicago, IL, United States
| | - Delfien Syx
- Department of Biomolecular Medicine, Center for Medical Genetics, Ghent University, Ghent, Belgium
| |
Collapse
|
6
|
Courties A, Olmer M, Myers K, Ordoukhanian P, Head SR, Natarajan P, Berenbaum F, Sellam J, Lotz MK. Human-specific duplicate CHRFAM7A gene is associated with more severe osteoarthritis and amplifies pain behaviours. Ann Rheum Dis 2023; 82:710-718. [PMID: 36627169 PMCID: PMC10101906 DOI: 10.1136/ard-2022-223470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 12/28/2022] [Indexed: 01/12/2023]
Abstract
OBJECTIVES CHRFAM7A is a uniquely human fusion gene that functions as a dominant negative regulator of alpha 7 acetylcholine nicotinic receptor (α7nAChR) in vitro. This study determined the impact of CHRFAM7A on α7nAChR agonist responses, osteoarthritis (OA) severity and pain behaviours and investigated mechanisms. METHODS Transgenic CHRFAM7A (TgCHRFAM7A) mice were used to determine the impact of CHRFAM7A on knee OA histology, pain severity in OA and other pain models, response to nAchR agonist and IL-1β. Mouse and human cells were used for mechanistic studies. RESULTS Transgenic (Tg) TgCHRFAM7A mice developed more severe structural damage and increased mechanical allodynia than wild type (WT) mice in the destabilisation of medial meniscus model of OA. This was associated with a decreased suppression of inflammation by α7nAchR agonist. TgCHRFAM7A mice displayed a higher basal sensitivity to pain stimuli and increased pain behaviour in the monoiodoacetate and formalin models. Dorsal root ganglia of TgCHRFAM7A mice showed increased macrophage infiltration and expression of the chemokine fractalkine and also had a compromised antinociceptive response to the α7nAchR agonist nicotine. Both native CHRNA7 and CHRFAM7A subunits were expressed in human joint tissues and the CHRFAM7A/CHRNA7 ratio was increased in OA cartilage. Human chondrocytes with two copies of CHRFAM7A had reduced anti-inflammatory responses to nicotine. CONCLUSION CHRFAM7A is an aggravating factor for OA-associated inflammation and tissue damage and a novel genetic risk factor and therapeutic target for pain.
Collapse
Affiliation(s)
- Alice Courties
- Department of Molecular Medicine, Scripps Research, La Jolla, California, USA
- INSERM UMRS 938, Hôpital Saint-Antoine, Service de rhumatologie, AP-HP, Sorbonne Université, Paris, France
| | - Merissa Olmer
- Department of Molecular Medicine, Scripps Research, La Jolla, California, USA
| | - Kevin Myers
- Department of Molecular Medicine, Scripps Research, La Jolla, California, USA
| | - Phillip Ordoukhanian
- Center for Computational Biology & Bioinformatics and Genomics Core, Scripps Research, La Jolla, California, USA
| | - Steven R Head
- Center for Computational Biology & Bioinformatics and Genomics Core, Scripps Research, La Jolla, California, USA
| | - Padmaja Natarajan
- Center for Computational Biology & Bioinformatics and Genomics Core, Scripps Research, La Jolla, California, USA
| | - Francis Berenbaum
- INSERM UMRS 938, Hôpital Saint-Antoine, Service de rhumatologie, AP-HP, Sorbonne Université, Paris, France
| | - Jérémie Sellam
- INSERM UMRS 938, Hôpital Saint-Antoine, Service de rhumatologie, AP-HP, Sorbonne Université, Paris, France
| | - Martin K Lotz
- Department of Molecular Medicine, Scripps Research, La Jolla, California, USA
| |
Collapse
|
7
|
Kendall A, Lützelschwab C, Lundblad J, Skiöldebrand E. Serum nerve growth factor in horses with osteoarthritis-associated lameness. J Vet Intern Med 2023; 37:1201-1208. [PMID: 37083137 DOI: 10.1111/jvim.16718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 04/08/2023] [Indexed: 04/22/2023] Open
Abstract
BACKGROUND Nerve growth factor (NGF) is a neurotrophin that is increased in osteoarthritic joints of horses. In humans, NGF has been associated with pain, and both synovial and serum NGF concentrations are increased in osteoarthritic patients. Studies in humans also have shown that serum NGF concentration can increase with stress. Serum NGF concentration should be evaluated in horses with osteoarthritis-associated lameness. OBJECTIVES Quantify and compare serum NGF concentration in horses with osteoarthritis-associated lameness and sound horses. Additionally, the impact of short-term stress on serum NGF concentration was investigated. ANIMALS Lame horses with radiographic evidence of osteoarthritis (n = 20), lame horses without radiographic changes in the affected joint (n = 20) and sound horses (n = 20). In addition, horses with acute fractures (n = 9) were sampled. To determine the effect of stress, serum from horses subjected to a stressful event (transportation, n = 5; stress confirmed by increased serum cortisol concentration) was analyzed. METHODS Cross-sectional clinical study (lame, sound, and fracture cohorts) and experimental longitudinal study (stress cohort). Serum NGF concentration was determined using a quantitative sandwich ELISA. RESULTS Serum NGF concentration was increased in lame horses with radiographic evidence of osteoarthritis (P < .0001; median, 238 pg/mL; interquartile range [IQR], 63-945 pg/mL) and in lame horses without radiographic evidence of osteoarthritis in the painful joint (P < .05; median, 31 pg/mL; IQR, 31-95 pg/mL) compared with sound horses (median, 31 pg/mL; IQR, 31-46 pg/mL). Serum NGF concentration did not increase with short-term stress and was low in horses with fracture-associated pain. CONCLUSIONS AND CLINICAL IMPORTANCE Serum NGF concentration was high in the cohort with advanced osteoarthritis and should be investigated as a marker for osteoarthritis-associated pain.
Collapse
Affiliation(s)
- Anna Kendall
- Division of Pathology, Pharmacology and Toxicology, Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Claudia Lützelschwab
- Division of Pathology, Pharmacology and Toxicology, Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Johan Lundblad
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Eva Skiöldebrand
- Division of Pathology, Pharmacology and Toxicology, Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden
| |
Collapse
|
8
|
Wang L, Ishihara S, Li J, Miller RE, Malfait AM. Notch signaling is activated in knee-innervating dorsal root ganglia in experimental models of osteoarthritis joint pain. Arthritis Res Ther 2023; 25:63. [PMID: 37061736 PMCID: PMC10105425 DOI: 10.1186/s13075-023-03039-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 03/28/2023] [Indexed: 04/17/2023] Open
Abstract
BACKGROUND We aimed to explore activation of the Notch signaling pathway in knee-innervating lumbar dorsal root ganglia (DRG) in the course of experimental osteoarthritis (OA) in mice, and its role in knee hyperalgesia. METHODS Cultured DRG cells were stimulated with the TLR4 agonist, lipopolysaccharide (LPS). Notch signaling in the cells was either inhibited with the γ-secretase inhibitor, DAPT, or with soluble Jagged1, or activated through immobilized Jagged1. CCL2 production was analyzed at mRNA and protein levels. In in vivo experiments, knee hyperalgesia was induced in naïve mice through intra-articular (IA) injection of LPS. The effect of inhibiting Notch signaling was examined by pre-injecting DAPT one hour before LPS. OA was induced through surgical destabilization of the medial meniscus (DMM) in male C57BL/6 mice. Gene expression in DRG was analyzed by qRT-PCR and RNAscope in situ hybridization. Activated Notch protein (NICD) expression in DRG was evaluated by ELISA and immunofluorescence staining. DAPT was injected IA 12 weeks post DMM to inhibit Notch signaling, followed by assessing knee hyperalgesia and CCL2 expression in the DRG. RESULTS In DRG cell cultures, LPS increased NICD in neuronal cells. Inhibition of Notch signaling with either DAPT or soluble Jagged1 attenuated LPS-induced increases of Ccl2 mRNA and CCL2 protein. Conversely, activating Notch signaling with immobilized Jagged1 enhanced these LPS effects. In vivo, IA injection of LPS increased expression of Notch genes and NICD in the DRG. Pre-injection of DAPT prior to LPS alleviated LPS-induced knee hyperalgesia, and decreased LPS-induced CCL2 expression in the DRG. Notch signaling genes were differentially expressed in the DRG from late-stage experimental OA. Notch1, Hes1, and NICD were increased in the neuronal cell bodies in DRG after DMM surgery. IA administration of DAPT alleviated knee hyperalgesia post DMM, and decreased CCL2 expression in the DRG. CONCLUSIONS These findings suggest a synergistic effect of Notch signaling with TLR4 in promoting CCL2 production and mediating knee hyperalgesia. Notch signaling is activated in knee-innervating lumbar DRG in mice with experimental OA, and is involved in mediating knee hyperalgesia. The pathway may therefore be explored as a target for alleviating OA pain.
Collapse
Affiliation(s)
- Lai Wang
- Division of Rheumatology, Department of Internal Medicine, Rush University Medical Center, 1611 West Harrison Street, Suite 510, Chicago, IL, 60612, USA.
| | - Shingo Ishihara
- Division of Rheumatology, Department of Internal Medicine, Rush University Medical Center, 1611 West Harrison Street, Suite 510, Chicago, IL, 60612, USA
| | - Jun Li
- Division of Rheumatology, Department of Internal Medicine, Rush University Medical Center, 1611 West Harrison Street, Suite 510, Chicago, IL, 60612, USA
| | - Rachel E Miller
- Division of Rheumatology, Department of Internal Medicine, Rush University Medical Center, 1611 West Harrison Street, Suite 510, Chicago, IL, 60612, USA
| | - Anne-Marie Malfait
- Division of Rheumatology, Department of Internal Medicine, Rush University Medical Center, 1611 West Harrison Street, Suite 510, Chicago, IL, 60612, USA.
| |
Collapse
|
9
|
Itson-Zoske B, Shin SM, Xu H, Qiu C, Fan F, Hogan QH, Yu H. Selective block of sensory neuronal T-type/Cav3.2 activity mitigates neuropathic pain behavior in a rat model of osteoarthritis pain. Arthritis Res Ther 2022; 24:168. [PMID: 35842727 PMCID: PMC9287929 DOI: 10.1186/s13075-022-02856-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/29/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Peripheral and central nociceptive sensitization is a critical pathogenetic component in osteoarthritis (OA) chronic pain. T-type calcium channel 3.2 (CaV3.2) regulates neuronal excitability and plays important roles in pain processing. We previously identified that enhanced T-type/CaV3.2 activity in the primary sensory neurons (PSNs) of dorsal root ganglia (DRG) is associated with neuropathic pain behavior in a rat model of monosodium iodoacetate (MIA)-induced knee OA. PSN-specific T-type/CaV3.2 may therefore represent an important mediator in OA painful neuropathy. Here, we test the hypothesis that the T-type/CaV3.2 channels in PSNs can be rationally targeted for pain relief in MIA-OA. METHODS MIA model of knee OA was induced in male and female rats by a single injection of 2 mg MIA into intra-knee articular cavity. Two weeks after induction of knee MIA-OA pain, recombinant adeno-associated viruses (AAV)-encoding potent CaV3.2 inhibitory peptide aptamer 2 (CaV3.2iPA2) that have been characterized in our previous study were delivered into the ipsilateral lumbar 4/5 DRG. Effectiveness of DRG-CaV3.2iPA2 treatment on evoked (mechanical and thermal) and spontaneous (conditioned place preference) pain behavior, as well as weight-bearing asymmetry measured by Incapacitance tester, in the arthritic limbs of MIA rats were evaluated. AAV-mediated transgene expression in DRG was determined by immunohistochemistry. RESULTS AAV-mediated expression of CaV3.2iPA2 selective in the DRG-PSNs produced significant and comparable mitigations of evoked and spontaneous pain behavior, as well as normalization of weight-bearing asymmetry in both male and female MIA-OA rats. Analgesia of DRG-AAV-CaV3.2iPA1, another potent CaV3.2 inhibitory peptide, was also observed. Whole-cell current-clamp recordings showed that AAV-mediated CaV3.2iPA2 expression normalized hyperexcitability of the PSNs dissociated from the DRG of MIA animals, suggesting that CaV3.2iPA2 attenuated pain behavior by reversing MIA-induced neuronal hyperexcitability. CONCLUSIONS Together, our results add therapeutic support that T-type/CaV3.2 in primary sensory pathways contributes to MIA-OA pain pathogenesis and that CaV3.2iPAs are promising analgesic leads that, combined with AAV-targeted delivery in anatomically segmental sensory ganglia, have the potential for further development as a peripheral selective T-type/CaV3.2-targeting strategy in mitigating chronic MIA-OA pain behavior. Validation of the therapeutic potential of this strategy in other OA models may be valuable in future study.
Collapse
Affiliation(s)
- Brandon Itson-Zoske
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Seung Min Shin
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Hao Xu
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
- Department of Orthopedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Chensheng Qiu
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
- Department of Orthopedic Surgery, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Fan Fan
- Department of Pharmacology and Toxicology, Mississippi University Medical Center, Jackson, MS, 39216, USA
| | - Quinn H Hogan
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Hongwei Yu
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI, 53226, USA.
| |
Collapse
|
10
|
Valdrighi N, Vago JP, Blom AB, van de Loo FA, Blaney Davidson EN. Innate Immunity at the Core of Sex Differences in Osteoarthritic Pain? Front Pharmacol 2022; 13:881500. [PMID: 35662714 PMCID: PMC9160873 DOI: 10.3389/fphar.2022.881500] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 04/29/2022] [Indexed: 11/24/2022] Open
Abstract
Osteoarthritis (OA) is a progressive whole-joint disease; no disease-modifying drugs are currently available to stop or slow its process. Symptoms alleviation is the only treatment option. OA is the major cause of chronic pain in adults, with pain being the main symptom driving patients to seek medical help. OA pathophysiology is closely associated with the innate immune system, which is also closely linked to pain mediators leading to joint pain. Pain research has shown sex differences in the biology of pain, including sexually dimorphic responses from key cell types in the innate immune system. Not only is OA more prevalent in women than in men, but women patients also show worse OA outcomes, partially due to experiencing more pain symptoms despite having similar levels of structural damage. The cause of sex differences in OA and OA pain is poorly understood. This review provides an overview of the involvement of innate immunity in OA pain in joints and in the dorsal root ganglion. We summarize the emerging evidence of sex differences regarding innate immunity in OA pain. Our main goal with this review was to provide a scientific foundation for future research leading to alternative pain relief therapies targeting innate immunity that consider sex differences. This will ultimately lead to a more effective treatment of pain in both women and men.
Collapse
|
11
|
Wood MJ, Miller RE, Malfait AM. The Genesis of Pain in Osteoarthritis: Inflammation as a Mediator of Osteoarthritis Pain. Clin Geriatr Med 2022; 38:221-238. [PMID: 35410677 PMCID: PMC9053380 DOI: 10.1016/j.cger.2021.11.013] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Chronic pain is a substantial personal and societal burden worldwide. Osteoarthritis (OA) is one of the leading causes of chronic pain and is increasing in prevalence in accordance with a global aging population. In addition to affecting patients' physical lives, chronic pain also adversely affects patients' mental wellbeing. However, there remain no pharmacologic interventions to slow down the progression of OA and pain-alleviating therapies are largely unsuccessful. The presence of low-level inflammation in OA has been recognized for many years as a major pathogenic driver of joint damage. Inflammatory mechanisms can occur locally in joint tissues, such as the synovium, within the sensory nervous system, as well as systemically, caused by modifiable and unmodifiable factors. Understanding how inflammation may contribute to, and modify pain in OA will be instrumental in identifying new druggable targets for analgesic therapies. In this narrative review, we discuss recent insights into inflammatory mechanisms in OA pain. We discuss how local inflammation in the joint can contribute to mechanical sensitization and to the structural neuroplasticity of joint nociceptors, through pro-inflammatory factors such as nerve growth factor, cytokines, and chemokines. We consider the role of synovitis, and the amplifying mechanisms of neuroimmune interactions. We then explore emerging evidence around the role of neuroinflammation in the dorsal root ganglia and dorsal horn. Finally, we discuss how systemic inflammation associated with obesity may modify OA pain and suggest future research directions.
Collapse
Affiliation(s)
- Matthew J Wood
- Department of Internal Medicine, Division of Rheumatology, Rush University Medical Center, Room 340, 1735 W Harrison Street, Chicago, IL 60612, USA
| | - Rachel E Miller
- Department of Internal Medicine, Division of Rheumatology, Rush University Medical Center, Room 714, 1735 W Harrison Street, Chicago, IL 60612, USA
| | - Anne-Marie Malfait
- Department of Internal Medicine, Division of Rheumatology, Rush University Medical Center, 1611 W Harrison Street, Suite 510, Chicago, IL 60612, USA.
| |
Collapse
|
12
|
Ita ME, Ghimire P, Granquist EJ, Winkelstein BA. MMPs in tissues retrieved during surgery from patients with TMJ disorders relate to pain more than to radiological damage score. J Orthop Res 2022; 40:338-347. [PMID: 33792957 PMCID: PMC8484377 DOI: 10.1002/jor.25048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 03/23/2021] [Accepted: 03/28/2021] [Indexed: 02/04/2023]
Abstract
Orofacial pain is among the most common chronic pain conditions and can result from temporomandibular disorders (TMDs) of the temporomandibular joint (TMJ). Matrix metalloproteinases (MMPs) drive degeneration of TMJ tissues and likely mediate pain in TMJ disorders given their role in nociception. However, few studies have assessed MMPs in the TMJ innervated tissues nor in the context of pain. This study defined the extent of MMP-1, MMP-9, and MMP-2 in TMJ tissues from patients undergoing total joint replacement (TJR) or arthroplasty discectomy for painful TMJ disorders. Protein expression was probed by Western blot in TMJ disc and capsular ligaments taken during TJR (n = 6) or discectomy (n = 3) for osteoarthritis or internal derangement in an IRB-approved study. Pro- and active MMP-1, active MMP-9, and pro- and active MMP-2 are detectable. MMP-1 and MMP-9 correlate positively to each other (Kendall's τ = 0.63; p = 0.01), strengthening the hypothesis that they are mechanistically related in regulatory cascades. Active MMP-1 and active MMP-9 correlate positively with self-reported pain scores (τ ≥ 0.51; p ≤ 0.04), suggesting their involvement in peripheral nociception. Overall, neither MMPs nor pain correlate with the functional vertical opening of the jaw. MMP-1 varies with the observed stage of degeneration during surgery (p = 0.04). Neither overall MMPs nor pain correlate with the overall magnetic resonance imaging scores, corroborating the longstanding, but confounding, clinical observation that pain and radiological evidence of joint damage are not always related. Clinical significance: These findings suggest that MMPs mediate pain in innervated soft tissues and may be targets for diagnosing disease stage and treatments in painful TMJ disorders.
Collapse
Affiliation(s)
- Meagan E. Ita
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104
| | - Prabesh Ghimire
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104
| | - Eric J. Granquist
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104
- Oral & Maxillofacial Surgery, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
| | - Beth A. Winkelstein
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104
- Department of Neurosurgery, University of Pennsylvania, Philadelphia, PA 19104
| |
Collapse
|
13
|
Zaki S, Smith MM, Little CB. Pathology-pain relationships in different osteoarthritis animal model phenotypes: it matters what you measure, when you measure, and how you got there. Osteoarthritis Cartilage 2021; 29:1448-1461. [PMID: 34332049 DOI: 10.1016/j.joca.2021.03.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 03/17/2021] [Accepted: 03/31/2021] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To determine whether osteoarthritis (OA) pain characteristics and mechanistic pathways in pre-clinical models are phenotype-specific. DESIGN Male 11-week-old C57BL6 mice had unilateral medial-meniscal-destabilization (DMM) or antigen-induced-arthritis (AIA), vs sham-surgery/immunised-controls (Sham/Im-CT). Pain behaviour (allodynia, mechanical- and thermal-hyperalgesia, hindlimb static weight-bearing, stride-length) and lumbar dorsal root ganglia (DRG) gene-expression were measured at baseline, day-3, week-1/-2/-4/-8/-16, and pain-behaviour:gene-expression:joint-pathology associations investigated. RESULTS DMM and AIA induced structural OA defined by progressively increasing cartilage erosion, subchondral bone sclerosis and osteophyte size and maturation. All pain-behaviours were modified, with model-specific differences in severity and temporal pattern. Tactile allodynia developed acutely in both models and persisted to week-16. During early-OA (wk4-8) there was; reduced right hindlimb weight-bearing in AIA; thermal-hyperalgesia and reduced stride-length in DMM. During chronic-OA (wk12-16); mechanical-hyperalgesia and reduced right hindlimb weight-bearing were observed in DMM only. There were no associations in either model between different pain-behaviour outcomes. A coordinated DRG-expression profile was observed in sham and Im-CT for all 11 genes tested, but not in AIA and DMM. At wk-16 despite equivalent joint pathology, changes in DRG-expression (Calca, Trpa1, Trpv1, Trpv4) were observed only in DMM. In AIA mechanical-hyperalgesia was associated with Trpv1 (r = -0.79) and Il1b (r = 0.53). In DMM stride-length was associated with Calca, Tac1, Trpv1, Trpv2, Trpv4 and Adamts5 (r = 0.4-0.57). DRG gene-expression change was correlated with subchondral-bone sclerosis in DMM, and cartilage damage in AIA. Positive pain-behaviour:joint-pathology associations were only present in AIA - for synovitis, subchondral-bone resorption, chondrocyte-hypertrophy and cartilage damage. CONCLUSION Pain and peripheral sensory neuronal responses are OA-phenotype-specific with distinct pathology:pain-outcome:molecular-mechanism relationships.
Collapse
Affiliation(s)
- S Zaki
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Australia; Raymond Purves Bone and Joint Research Laboratory, Kolling Institute of Medical Research, Faculty of Medicine and Health, The University of Sydney, at Royal North Shore Hospital, Australia.
| | - M M Smith
- Raymond Purves Bone and Joint Research Laboratory, Kolling Institute of Medical Research, Faculty of Medicine and Health, The University of Sydney, at Royal North Shore Hospital, Australia.
| | - C B Little
- Raymond Purves Bone and Joint Research Laboratory, Kolling Institute of Medical Research, Faculty of Medicine and Health, The University of Sydney, at Royal North Shore Hospital, Australia.
| |
Collapse
|
14
|
Grässel S, Zaucke F, Madry H. Osteoarthritis: Novel Molecular Mechanisms Increase Our Understanding of the Disease Pathology. J Clin Med 2021; 10:jcm10091938. [PMID: 33946429 PMCID: PMC8125020 DOI: 10.3390/jcm10091938] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/26/2021] [Accepted: 04/27/2021] [Indexed: 12/12/2022] Open
Abstract
Although osteoarthritis (OA) is the most common musculoskeletal condition that causes significant health and social problems worldwide, its exact etiology is still unclear. With an aging and increasingly obese population, OA is becoming even more prevalent than in previous decades. Up to 35% of the world’s population over 60 years of age suffers from symptomatic (painful, disabling) OA. The disease poses a tremendous economic burden on the health-care system and society for diagnosis, treatment, sick leave, rehabilitation, and early retirement. Most patients also experience sleep disturbances, reduced capability for exercising, lifting, and walking and are less capable of working, and maintaining an independent lifestyle. For patients, the major problem is disability, resulting from joint tissue destruction and pain. So far, there is no therapy available that effectively arrests structural deterioration of cartilage and bone or is able to successfully reverse any of the existing structural defects. Here, we elucidate novel concepts and hypotheses regarding disease progression and pathology, which are relevant for understanding underlying the molecular mechanisms as a prerequisite for future therapeutic approaches. Emphasis is placed on topographical modeling of the disease, the role of proteases and cytokines in OA, and the impact of the peripheral nervous system and its neuropeptides.
Collapse
Affiliation(s)
- Susanne Grässel
- Department of Orthopaedic Surgery, Experimental Orthopaedics, Centre for Medical Biotechnology (ZMB), Bio Park 1, University of Regensburg, 93053 Regensburg, Germany
- Correspondence:
| | - Frank Zaucke
- Dr. Rolf M. Schwiete Research Unit for Osteoarthritis, Orthopedic University Hospital Friedrichsheim, 60528 Frankfurt am Main, Germany;
| | - Henning Madry
- Center of Experimental Orthopaedics, Saarland University, 66421 Homburg, Germany;
| |
Collapse
|
15
|
Abstract
There is a well-established historical observation that structural joint damage by plain X-ray correlates poorly with symptomatic disease in osteoarthritis (OA). This is often attributed to the inability to visualise soft-tissue pathology within the joint and the recognition of heterogeneous patient factors that drive central pain sensitisation. A major issue is the relative paucity of mechanistic studies in which molecular pathogenesis of pain is interrogated in relation to tissue pathology. Nonetheless, in recent years, three broad approaches have been deployed to attempt to address this: correlative clinical studies of peripheral and central pain outcomes using magnetic resonance imaging, where soft-tissue processes can be visualised; molecular studies on tissue from patients with OA; and careful molecular interrogation of preclinical models of OA across the disease time course. Studies have taken advantage of established clinical molecular targets such as nerve growth factor. Not only is the regulation of nerve growth factor within the joint being used to explore the relationship between tissue pathology and the origins of pain in OA, but it also provides a core model on which other molecules present within the joint can modulate the pain response. In this narrative review, how molecular and pathological tissue change relates to joint pain in OA will be discussed. Finally, a model for how tissue damage may lead to pain over the disease course will be proposed.
Collapse
|
16
|
Malfait AM, Miller RE, Miller RJ. Basic Mechanisms of Pain in Osteoarthritis: Experimental Observations and New Perspectives. Rheum Dis Clin North Am 2021; 47:165-180. [PMID: 33781488 DOI: 10.1016/j.rdc.2020.12.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The specific changes in the peripheral neuronal pathways underlying joint pain in osteoarthritis are the focus of this review. The plasticity of the nociceptive system in osteoarthritis and how this involves changes in the structural, physiologic, and genetic properties of neurons in pain pathways are discussed. The role of the neurotrophin, nerve growth factor, in these pathogenic processes is discussed. Finally, how neuronal pathways are modified by interaction with the degenerating joint tissues they innervate and with the innate immune system is considered. These extensive cellular interactions provide a substrate for identification of targets for osteoarthritis pain.
Collapse
Affiliation(s)
- Anne-Marie Malfait
- Department of Internal Medicine, Division of Rheumatology, Rush University Medical Center, Room 714, 1735 W Harrison Street, Chicago, IL 60612, USA.
| | - Rachel E Miller
- Department of Internal Medicine, Division of Rheumatology, Rush University Medical Center, Room 714, 1735 W Harrison Street, Chicago, IL 60612, USA
| | - Richard J Miller
- Department of Pharmacology, Northwestern University, Searle Building Room 8-510, 320 E Superior Street, Chicago, IL 60611, USA
| |
Collapse
|
17
|
Neuroimmune interactions and osteoarthritis pain: focus on macrophages. Pain Rep 2021; 6:e892. [PMID: 33981927 PMCID: PMC8108586 DOI: 10.1097/pr9.0000000000000892] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/01/2020] [Accepted: 12/06/2020] [Indexed: 12/14/2022] Open
Abstract
Bidirectional interactions between the immune system and the nervous system are increasingly appreciated as playing a pathogenic role in chronic pain. Unraveling the mechanisms by which inflammatory pain is mediated through communication between nerves and immune cells may lead to exciting new strategies for therapeutic intervention. In this narrative review, we focus on the role of macrophages in the pathogenesis of osteoarthritis (OA) pain. From regulating homeostasis to conducting phagocytosis, and from inducing inflammation to resolving it, macrophages are plastic cells that are highly adaptable to their environment. They rely on communicating with the environment through cytokines, growth factors, neuropeptides, and other signals to respond to inflammation or injury. The contribution of macrophages to OA joint damage has garnered much attention in recent years. Here, we discuss how macrophages may participate in the initiation and maintenance of pain in OA. We aim to summarize what is currently known about macrophages in OA pain and identify important gaps in the field to fuel future investigations.
Collapse
|
18
|
Ratneswaran A, Kapoor M. Osteoarthritis year in review: genetics, genomics, epigenetics. Osteoarthritis Cartilage 2021; 29:151-160. [PMID: 33227439 DOI: 10.1016/j.joca.2020.11.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/23/2020] [Accepted: 11/13/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE In this review, we have highlighted advances in genetics, genomics and epigenetics in the field of osteoarthritis (OA) over the past year. METHODS A literature search was performed using PubMed and the criteria: "osteoarthritis" and one of the following terms "genetic(s), genomic(s), epigenetic(s), epigenomic(s), noncoding RNA, microRNA, long noncoding RNA, lncRNA, circular RNA, RNA sequencing, single cell sequencing, or DNA methylation between April 1, 2019 and April 30, 2020. RESULTS We identified 653 unique publications, many studies spanned multiple search terms. We summarized advances relating to evolutionary genetics, pain, ethnicity specific risk factors, functional studies of gene variants, and interactions between coding and non-coding RNAs in OA pathogenesis. CONCLUSIONS Studies have identified variants contributing to OA susceptibility, candidate biomarkers for diagnosis and prognosis, as well as promising therapeutic candidates. Validation in multiple cohorts, multi-omics strategies, and machine learning aided computational analyses have all contributed to the strength of published literature. Open access data-sets, greater sample sizes to capture broader populations and understanding disease mechanisms by investigating the interactions between multiple tissue types will further aid in progress towards understanding and curing OA.
Collapse
Affiliation(s)
- A Ratneswaran
- Schroeder Arthritis Institute, University Health Network, Toronto, ON, Canada; Krembil Research Institute, University Health Network, Toronto, ON, Canada
| | - M Kapoor
- Schroeder Arthritis Institute, University Health Network, Toronto, ON, Canada; Krembil Research Institute, University Health Network, Toronto, ON, Canada; Department of Surgery, Faculty of Medicine, University of Toronto, ON, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.
| |
Collapse
|
19
|
Fayet M, Hagen M. Pain characteristics and biomarkers in treatment approaches for osteoarthritis pain. Pain Manag 2021; 11:59-73. [DOI: 10.2217/pmt-2020-0055] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Osteoarthritis (OA) is a progressive disease and OA pain intensity is related to ongoing pathophysiological changes. However, OA pain is complex and multimodal; its characteristics, including severity, localization and the stimuli that elicit it, can change as the disease progresses and differ greatly among patients. Understanding mechanisms underlying specific pain characteristics may help guide clinicians in choosing appropriate treatments, targeting treatments to those patients most likely to benefit. Associations have been demonstrated between biomarkers and some characteristics of OA pain, and to processes linked to the shift in pain characteristics over the course of OA. This article examines how understanding OA pain characteristics and their relation to the disease process could inform treatment choice when applying well-established treatment guidelines.
Collapse
Affiliation(s)
- Marina Fayet
- GSK Consumer Healthcare S.A., Route de l'Etraz 2, 1260, Nyon, Switzerland
| | - Martina Hagen
- GSK Consumer Healthcare S.A., Route de l'Etraz 2, 1260, Nyon, Switzerland
| |
Collapse
|
20
|
Griffin TM, Lories RJ. Cracking the code on the innate immune program in OA. Osteoarthritis Cartilage 2020; 28:529-531. [PMID: 32278072 DOI: 10.1016/j.joca.2020.03.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 03/31/2020] [Indexed: 02/02/2023]
Affiliation(s)
- T M Griffin
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation (OMRF), Oklahoma City, OK, 73104, USA; Reynolds Oklahoma Center on Aging, Department of Biochemistry and Molecular Biology, Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA; Veterans Affairs Medical Center, Oklahoma City, OK, 73104, USA.
| | - R J Lories
- Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, Leuven, 3000, Belgium; University Hospitals Leuven, Division of Rheumatology, Leuven, 3000, Belgium.
| |
Collapse
|
21
|
Malfait AM, Miller RE, Block JA. Targeting neurotrophic factors: Novel approaches to musculoskeletal pain. Pharmacol Ther 2020; 211:107553. [PMID: 32311372 DOI: 10.1016/j.pharmthera.2020.107553] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 04/06/2020] [Indexed: 12/13/2022]
Abstract
Chronic pain represents a substantial unmet medical need globally. In recent years, the quest for a new generation of novel, safe, mechanism-based analgesic treatments has focused on neurotrophic factors, a large group of secreted proteins that control the growth and survival of different populations of neurons, but that postnatally are involved in the genesis and maintenance of pain, with biological activity in both the periphery and the central nervous system. In this narrative review, we discuss the two families of neurotrophic proteins that have been extensively studied for their role in pain: first, the neurotrophins, nerve growth factor (NGF) and brain-derived growth factor (BDNF), and secondly, the GDNF family of ligands (GFLs). We provide an overview of the pain pathway, and the pain-producing effects of these different proteins. We summarize accumulating preclinical and clinical findings with a focus on musculoskeletal pain, and on osteoarthritis in particular, because the musculoskeletal system is the most prevalent source of chronic pain and of disability, and clinical testing of these novel agents - often biologics- is most advanced in this area.
Collapse
Affiliation(s)
- Anne-Marie Malfait
- Division of Rheumatology, Rush University Medical Center, 1611 W Harrison Street, Suite 510, Chicago, IL 60612, United States of America
| | - Rachel E Miller
- Division of Rheumatology, Rush University Medical Center, 1611 W Harrison Street, Suite 510, Chicago, IL 60612, United States of America
| | - Joel A Block
- Division of Rheumatology, Rush University Medical Center, 1611 W Harrison Street, Suite 510, Chicago, IL 60612, United States of America.
| |
Collapse
|