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Worsfold SI, Carter K, Akbar M, Hackett L, Millar NL, Murrell GAC. Rotator Cuff Tendinopathy: Pathways of Apoptosis. Sports Med Arthrosc Rev 2024; 32:12-16. [PMID: 38695498 DOI: 10.1097/jsa.0000000000000387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 05/06/2024]
Abstract
Rotator cuff repair is usually successful, but retear is not uncommon. It has been previously identified that there is a higher incidence of apoptosis in the edges of the torn supraspinatus tendon. A prospective cohort study was conducted with 28 patients-14 rotator cuff tear patients, 5 instability patients, and 9 Anterior cruciate ligament reconstruction patients to determine whether there was any increase in several genes implicated in apoptosis, including Fas receptor (FasR), Fas ligand, Aifm-1, Bcl-2, Fadd, Bax, and caspase-3. There was a significant expression of Bax (P=0.2) and FasR (P=0.005) in the edges of torn supraspinatus tendons, and in intact subscapularis tendons, there was a significant expression of caspase-3 (P=0.02) compared with samples from the torn supraspinatus tendon (P=0.04). The cytochrome c pathway, with its subsequent activation of caspase-3, as well as the TRAIL-receptor signaling pathway involving FasR have both been implicated. The elevated expression of Bax supported the model that the Bax to Bcl-2 expression ratio represents a cell death switch. The elevated expression of Bax in the intact subscapularis tissue from rotator cuff tear patients also may confirm that tendinopathy is an ongoing molecular process.
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Affiliation(s)
- Sophie I Worsfold
- Department of Orthopaedic Surgery, Orthopaedic Research Institute, University of New South Wales, St George Hospital Campus, Sydney, NSW, Australia
| | - Kristyn Carter
- Institute of infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Moeed Akbar
- Institute of infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Lisa Hackett
- Department of Orthopaedic Surgery, Orthopaedic Research Institute, University of New South Wales, St George Hospital Campus, Sydney, NSW, Australia
| | - Neal L Millar
- Institute of infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - George A C Murrell
- Department of Orthopaedic Surgery, Orthopaedic Research Institute, University of New South Wales, St George Hospital Campus, Sydney, NSW, Australia
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Stubbs C, McAuliffe S, Chimenti RL, Coombes BK, Haines T, Heales L, de Vos RJ, Lehman G, Mallows A, Michner LA, Millar NL, O'Neill S, O'Sullivan K, Plinsinga M, Rathleff M, Rio E, Ross M, Roy JS, Silbernagel KG, Thomson A, Trevail T, van den Akker-Scheek I, Vicenzino B, Vlaeyen JWS, Pinto RZ, Malliaras P. Which Psychological and Psychosocial Constructs Are Important to Measure in Future Tendinopathy Clinical Trials? A Modified International Delphi Study With Expert Clinician/Researchers and People With Tendinopathy. J Orthop Sports Phys Ther 2024; 54:1-12. [PMID: 37729020 DOI: 10.2519/jospt.2023.11903] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
OBJECTIVE: To identify which psychological and psychosocial constructs to include in a core outcome set to guide future clinical trials in the tendinopathy field. DESIGN: Modified International Delphi study. METHODS: In 3 online Delphi rounds, we presented 35 psychological and psychosocial constructs to an international panel of 38 clinician/researchers and people with tendinopathy. Using a 9-point Likert scale (1 = not important to include, 9 = critical to include), consensus for construct inclusion required ≥70% of respondents rating "extremely critical to include" (score ≥7) and ≤15% rating "not important to include" (score ≤3). Consensus for exclusion required ≥70% of respondents rating "not important to include" (score ≤3) and ≤15% of rating "critical to include" (score ≥7). RESULTS: Thirty-six participants (95% of 38) completed round 1, 90% (n = 34) completed round 2, and 87% (n = 33) completed round 3. Four constructs were deemed important to include as part of a core outcome set: kinesiophobia (82%, median: 8, interquartile range [IQR]: 1.0), pain beliefs (76%, median: -7, IQR: 1.0), pain-related self-efficacy (71%, median: 7, IQR: 2.0), and fear-avoidance beliefs (73%, median: -7, IQR: 1.0). Six constructs were deemed not important to include: perceived injustice (82%), individual attitudes of family members (74%), social isolation and loneliness (73%), job satisfaction (73%), coping (70%), and educational attainment (70%). Clinician/researchers and people with tendinopathy reached consensus that kinesiophobia, pain beliefs, pain self-efficacy, and fear-avoidance beliefs were important psychological constructs to measure in tendinopathy clinical trials. J Orthop Sports Phys Ther 2024;54(1):1-12. Epub 20 September 2023. doi:10.2519/jospt.2023.11903.
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Challoumas D, Ramasubbu R, Rooney E, Seymour-Jackson E, Putti A, Millar NL. Management of de Quervain Tenosynovitis: A Systematic Review and Network Meta-Analysis. JAMA Netw Open 2023; 6:e2337001. [PMID: 37889490 PMCID: PMC10611995 DOI: 10.1001/jamanetworkopen.2023.37001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 08/28/2023] [Indexed: 10/28/2023] Open
Abstract
Importance There is a plethora of treatment options for patients with de Quervain tenosynovitis (DQT), but there are limited data on their effectiveness and no definitive management guidelines. Objective To assess and compare the effectiveness associated with available treatment options for DQT to guide musculoskeletal practitioners and inform guidelines. Data Sources Medline, Embase, PubMed, Cochrane Central, Scopus, OpenGrey.eu, and WorldCat.org were searched for published studies, and the World Health Organization International Clinical Trials Registry Platform, ClinicalTrials.gov, The European Union Clinical Trials Register, and the ISRCTN registry were searched for unpublished and ongoing studies from inception to August 2022. Study Selection All randomized clinical trials assessing the effectiveness of any intervention for the management of DQT. Data Extraction and Synthesis This study was prospectively registered on PROSPERO and conducted and reported per Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension Statement for Reporting of Systematic Reviews Incorporating Network Meta-analyses of Health Care Interventions (PRISMA-NMA) and PRISMA in Exercise, Rehabilitation, Sport Medicine and Sports Science (PERSIST) guidance. The Cochrane Risk of Bias tool and the Grading of Recommendations, Assessment, Development, and Evaluations tool were used for risk of bias and certainty of evidence assessment for each outcome. Main Outcomes and Measures Pairwise and network meta-analyses were performed for patient-reported pain using a visual analogue scale (VAS) and for function using the quick disabilities of the arm, shoulder, and hand (Q-DASH) scale. Mean differences (MD) with their 95% CIs were calculated for the pairwise meta-analyses. Results A total of 30 studies with 1663 patients (mean [SD] age, 46 [7] years; 80% female) were included, of which 19 studies were included in quantitative analyses. From the pairwise meta-analyses, based on evidence of moderate certainty, adding thumb spica immobilization for 3 to 4 weeks to a corticosteroid injection (CSI) was associated with statistically but not clinically significant functional benefits in the short-term (MD, 10.5 [95% CI, 6.8-14.1] points) and mid-term (MD, 9.4 [95% CI, 7.0-11.9] points). In the network meta-analysis, interventions that included ultrasonography-guided CSI ranked at the top for pain. CSI with thumb spica immobilization had the highest probability of being the most effective intervention for short- and mid-term function. Conclusions and Relevance This network meta-analysis found that adding a short period of thumb spica immobilization to CSI was associated with statistically but not clinically significant short- and mid-term benefits. These findings suggest that administration of CSI followed by 3 to 4 weeks immobilization should be considered as a first-line treatment for patients with DQT.
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Affiliation(s)
- Dimitris Challoumas
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland
| | - Rohan Ramasubbu
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland
| | - Elliot Rooney
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland
| | - Emily Seymour-Jackson
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland
| | - Amit Putti
- Department of Orthopaedic Surgery, Forth Valley Royal Hospital, Larbert, Scotland
| | - Neal L. Millar
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland
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Challoumas D, Crosbie G, O'Neill S, Pedret C, Millar NL. Effectiveness of Exercise Treatments with or without Adjuncts for Common Lower Limb Tendinopathies: A Living Systematic Review and Network Meta-analysis. Sports Med Open 2023; 9:71. [PMID: 37553459 PMCID: PMC10409676 DOI: 10.1186/s40798-023-00616-1] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Accepted: 07/16/2023] [Indexed: 08/10/2023]
Abstract
INTRODUCTION Exercise therapy is usually prescribed as first-line treatment for lower limb tendinopathies. The multitude of exercise- and non-exercise-based management options can be overwhelming for the treating sports professional and patient alike. We chose to investigate the comparative effectiveness of exercise therapy with or without adjuncts for managing the commonest lower limb tendinopathies. METHODS Through an extensive systematic literature search using multiple databases, we aimed to identify eligible randomised controlled trials (RCTs) on Achilles tendinopathy, patellar tendinopathy or greater trochanteric pain syndrome (GTPS) that included at least one exercise intervention in their treatment arms. Our primary outcomes were patient-reported pain and function (Victorian Institute of Sport Assessment; VISA). Follow-up was defined as short-term (≤ 12 weeks), mid-term (> 12 weeks to < 12 months) and long-term (≥ 12 months). The risk of bias and strength of evidence were assessed with the Cochrane Collaboration and GRADE-NMA tools, respectively. Analyses were performed separately for each one of the three tendinopathies. RESULTS A total of 68 RCTs were included in the systematic review. All pairwise comparisons that demonstrated statistically and clinically significant differences between interventions were based on low or very low strength of evidence. Based on evidence of moderate strength, the addition of extracorporeal shockwave therapy to eccentric exercise in patellar tendinopathy was associated with no short-term benefit in pain or VISA-P. From the network meta-analyses, promising interventions such as slow resistance exercise and therapies administered alongside eccentric exercise, such as topical glyceryl trinitrate for patellar tendinopathy and high-volume injection with corticosteroid for Achilles tendinopathy were based on low/very low strength of evidence. CONCLUSION In this network meta-analysis, we found no convincing evidence that any adjuncts administered on their own or alongside exercise are more effective than exercise alone. Therefore, we recommend that exercise monotherapy continues to be offered as first-line treatment for patients with Achilles and patellar tendinopathies and GTPS for at least 3 months before an adjunct is considered. We provide treatment recommendations for each tendinopathy. PROSPERO registration number CRD42021289534.
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Affiliation(s)
- Dimitris Challoumas
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 120 University Avenue, Glasgow, G12 8TA, UK
| | - Gearoid Crosbie
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 120 University Avenue, Glasgow, G12 8TA, UK
| | - Seth O'Neill
- Department of Physiotherapy, School of Allied Health Professionals, University of Leicester, Leicester, UK
| | - Carles Pedret
- Sports Medicine and Imaging Department, Clinica Diagonal,, C/San Mateu, Esplugues de Llobregat, Spain
| | - Neal L Millar
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 120 University Avenue, Glasgow, G12 8TA, UK.
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Crowe LAN, Akbar M, de Vos RJ, Kirwan PD, Kjaer M, Pedret C, McInnes IB, Siebert S, Millar NL. Pathways driving tendinopathy and enthesitis: siblings or distant cousins in musculoskeletal medicine? Lancet Rheumatol 2023; 5:e293-e304. [PMID: 38251592 DOI: 10.1016/s2665-9913(23)00074-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 02/19/2023] [Accepted: 03/02/2023] [Indexed: 01/23/2024]
Abstract
Tendinopathy and enthesitis share clinical, anatomical, and molecular parallels. However, their relationship is complex, presenting challenges in diagnosis and treatment. The biomechanics underlying these pathologies, together with relative immune and stromal contributions to pathology, are characterised by crucial comparative elements. However, methodologies used to study enthesitis and tendinopathy have been divergent, which could account for discrepancies in how these conditions are perceived and treated. In this Review, we summarise key clinical parallels between these two common presentations in musculoskeletal medicine and address factors that currently preclude development of more effective therapeutics. Furthermore, we describe molecular similarities and disparities that govern pathological mechanisms in tendinopathy and enthesitis, thus informing translational studies and treatment strategies.
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Affiliation(s)
- Lindsay A N Crowe
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Moeed Akbar
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Robert-Jan de Vos
- Department of Orthopaedics and Sports Medicine, Erasmus University Medical Center, Rotterdam, Netherlands
| | - Paul D Kirwan
- Discipline of Physiotherapy, School of Medicine, Trinity College Dublin, Dublin, Ireland; Physiotherapy Department, Connolly Hospital, Blanchardstown, Dublin, Ireland
| | - Michael Kjaer
- Institute of Sports Medicine, Copenhagen University Hospital-Bispebjerg Frederiksberg, Copenhagen, Denmark
| | - Carles Pedret
- Sports Medicine and Imaging Department, Clinica Mapfre de Medicina del Tenis C/Muntaner, Barcelona, Spain
| | - Iain B McInnes
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Stefan Siebert
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Neal L Millar
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.
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Challoumas D, Zouvani A, Creavin K, Murray E, Crosbie G, Ng N, Millar NL. Determining minimal important differences for patient-reported outcome measures in shoulder, lateral elbow, patellar and Achilles tendinopathies using distribution-based methods. BMC Musculoskelet Disord 2023; 24:158. [PMID: 36864412 PMCID: PMC9979571 DOI: 10.1186/s12891-023-06261-9] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 02/21/2023] [Indexed: 03/04/2023] Open
Abstract
BACKGROUND Minimal important difference (MID) is a concept used inconsistently and arbitrarily in tendinopathy research. Our aim was to determine the MIDs for the most commonly used tendinopathy outcome measures using data-driven approaches. METHODS Recently published systematic reviews of randomised controlled trials (RCTs) on tendinopathy management were identified and used for extraction of eligible studies through a literature search. Each eligible RCT was used to obtain information on MID where this was used and it also contributed data for the calculation of the baseline pooled standard deviation (SD) for each tendinopathy (shoulder, lateral elbow, patellar and Achilles). The rule of "half SD" was used for the computation of MIDs for patient-reported pain (visual analogue scale, VAS 0-10, single-item questionnaire) and function (multi-item questionnaires) and the rule of "one standard error of measurement (SEM)" was additionally used for the multi-item functional outcome measures. RESULTS A total of 119 RCTs were included for the 4 tendinopathies. MID was defined and used by 58 studies (49%) and there were significant inconsistencies amongst studies where the same outcome measure was used as MID. From our data-driven methods the following suggested MIDs were obtained: a) Shoulder tendinopathy, pain VAS (combined) 1.3 points, Constant-Murley score 6.9 (half SD) and 7.0 (one SEM) points; b) lateral elbow tendinopathy, pain VAS (combined) 1.0 point, Disabilities of Arm, Shoulder and Hand questionnaire 8.9 (half SD) and 4.1 (one SEM) points; c) Patellar tendinopathy, pain VAS (combined) 1.2 points, Victorian Institute of Sport Assessment - Patella (VISA-P) 7.3 (half SD) and 6.6 points (one SEM); d) Achilles tendinopathy, pain VAS (combined) 1.1 points, VISA-Achilles (VISA-A) 8.2 (half SD) and 7.8 points (one SEM). The rules of half SD and one SEM produced very similar MIDs except for DASH due to its very high internal consistency. MIDs were also calculated for different pain settings for each tendinopathy. CONCLUSIONS Our computed MIDs can be used in tendinopathy research to increase consistency. Clearly defined MIDs should be used with consistency in tendinopathy management studies in the future.
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Affiliation(s)
- Dimitris Challoumas
- grid.8756.c0000 0001 2193 314XSchool of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Andrea Zouvani
- grid.8756.c0000 0001 2193 314XSchool of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Kevin Creavin
- grid.8756.c0000 0001 2193 314XSchool of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Elspeth Murray
- grid.8756.c0000 0001 2193 314XSchool of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Gearoid Crosbie
- grid.8756.c0000 0001 2193 314XSchool of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Nigel Ng
- grid.8756.c0000 0001 2193 314XSchool of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Neal L. Millar
- grid.8756.c0000 0001 2193 314XSchool of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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Orchard KJA, Akbar M, Crowe LAN, Cole J, Millar NL, Raleigh SM. Characterization of Histone Modifications in Late-Stage Rotator Cuff Tendinopathy. Genes (Basel) 2023; 14:496. [PMID: 36833423 PMCID: PMC9956879 DOI: 10.3390/genes14020496] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/09/2023] [Accepted: 02/11/2023] [Indexed: 02/18/2023] Open
Abstract
The development and progression of rotator cuff tendinopathy (RCT) is multifactorial and likely to manifest through a combination of extrinsic, intrinsic, and environmental factors, including genetics and epigenetics. However, the role of epigenetics in RCT, including the role of histone modification, is not well established. Using chromatin immunoprecipitation sequencing, differences in the trimethylation status of H3K4 and H3K27 histones in late-stage RCT compared to control were investigated in this study. For H3K4, 24 genomic loci were found to be significantly more trimethylated in RCT compared to control (p < 0.05), implicating genes such as DKK2, JAG2, and SMOC2 in RCT. For H3K27, 31 loci were shown to be more trimethylated (p < 0.05) in RCT compared to control, inferring a role for EPHA3, ROCK1, and DEFβ115. Furthermore, 14 loci were significantly less trimethylated (p < 0.05) in control compared to RCT, implicating EFNA5, GDF6, and GDF7. Finally, the TGFβ signaling, axon guidance, and regulation of focal adhesion assembly pathways were found to be enriched in RCT. These findings suggest that the development and progression of RCT is, at least in part, under epigenetic control, highlighting the influence of histone modifications in this disorder and paving the way to further understand the role of epigenome in RCT.
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Affiliation(s)
- Kayleigh J. A. Orchard
- Centre for Sports, Exercise and Life Sciences, Coventry University, Coventry CV1 5FB, UK
| | - Moeed Akbar
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, UK
| | - Lindsay A. N. Crowe
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, UK
| | - John Cole
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, UK
| | - Neal L. Millar
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, UK
| | - Stuart M. Raleigh
- Centre for Sports, Exercise and Life Sciences, Coventry University, Coventry CV1 5FB, UK
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Wasker SVZ, Challoumas D, Weng W, Murrell GAC, Millar NL. Is neurogenic inflammation involved in tendinopathy? A systematic review. BMJ Open Sport Exerc Med 2023; 9:e001494. [PMID: 36793930 PMCID: PMC9923261 DOI: 10.1136/bmjsem-2022-001494] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/12/2023] [Indexed: 02/11/2023] Open
Abstract
Neurogenic pain and inflammation have been hypothesised to play an important role in tendinopathy. This systematic review aimed to present and assess the evidence on neurogenic inflammation in tendinopathy. A systematic search was conducted through multiple databases to identify human case-control studies assessing neurogenic inflammation through the upregulation of relevant cells, receptors, markers and mediators. A newly devised tool was used for the methodological quality assessment of studies. Results were pooled based on the cell/receptor/marker/mediator assessed. A total of 31 case-control studies were eligible for inclusion. The tendinopathic tissue was obtained from Achilles (n=11), patellar (n=8), extensor carpi radialis brevis (n=4), rotator cuff (n=4), distal biceps (n=3) and gluteal (n=1) tendons. Through pooling the results of included studies based on the marker of neurogenic inflammation assessed, we identified possible upregulation of protein gene product 9.5 (PGP 9.5), N-methyl-D-aspartate Receptors, glutamate, glutamate receptors (mGLUT), neuropeptide Y (NPY) and adrenoreceptors in tendinopathic tissue versus control. Calcitonin gene-related peptide (CGRP) was not found to be upregulated, and the evidence was conflicting for several other markers. These findings show the involvement of the glutaminergic and sympathetic nervous systems and the upregulation of nerve ingrowth markers supporting the concept that neurogenic inflammation plays a role in tendinopathy.
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Affiliation(s)
- Shimon Vinay Zedeck Wasker
- Orthopaedic Research Institute, St George Hospital Sydney, University of New South Wales, Sydney, New South Wales, Australia
| | - Dimitris Challoumas
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Wai Weng
- Orthopaedic Research Institute, St George Hospital Sydney, University of New South Wales, Sydney, New South Wales, Australia
| | - George A C Murrell
- Orthopaedic Research Institute, St George Hospital Sydney, University of New South Wales, Sydney, New South Wales, Australia
| | - Neal L Millar
- School of Infection and Immunity, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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Willmore EG, Millar NL, van der Windt D. Post-surgical physiotherapy in frozen shoulder: A review. Shoulder Elbow 2022; 14:438-451. [PMID: 35846406 PMCID: PMC9284307 DOI: 10.1177/1758573220965870] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 09/21/2020] [Accepted: 09/22/2020] [Indexed: 11/17/2022]
Abstract
Despite its prevalence, the optimal management of frozen shoulder is unclear. A range of conservative measures are often undertaken with varying degrees of success. In cases of severe and persistent symptoms, release procedures which could include any combination of manipulation under anaesthetic, arthroscopic capsular release or hydrodilatation are frequently offered, none of which has been shown to offer superior outcome over the others. When surgical release is performed a period of rehabilitation is normally recommended but no best practice guidelines exist resulting in considerable variations in practice which may or may not directly affect patient outcome. During this narrative review, we hypothesise that these differing responses to treatment (both conservative and surgical options) are potentially the result of different causal mechanisms for frozen shoulder and may also suggest that post-release rehabilitation may need to take this into account.
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Affiliation(s)
- Elaine G Willmore
- Therapy Department, Gloucestershire
Hospitals NHS Foundation Trust, Cheltenham, UK
| | - Neal L Millar
- Institute of Infection, Immunity and
Inflammation, College of Medicine, Veterinary and Life Sciences, University of
Glasgow, Glasgow, UK
| | - Daniëlle van der Windt
- School for Primary, Community and Social
Care, Centre for Prognosis Research, Primary Centre, Versus Arthritis, Keele
University, Staffordshire, UK
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Edgar N, Clifford C, O'Neill S, Pedret C, Kirwan P, Millar NL. Biopsychosocial approach to tendinopathy. BMJ Open Sport Exerc Med 2022; 8:e001326. [PMID: 35990762 PMCID: PMC9345071 DOI: 10.1136/bmjsem-2022-001326] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/15/2022] [Indexed: 12/15/2022] Open
Abstract
Tendinopathy describes a spectrum of changes that occur in damaged tendons, leading to pain and reduced function that remains extremely challenging for all clinicians. There is an increasing awareness of the influence that psychological and psychosocial components, such as self-efficacy and fear-avoidance, have on rehabilitation outcomes in musculoskeletal medicine. Although it is widely accepted that psychological/psychosocial factors exist in tendinopathy, there is currently a distinct lack of trials measuring how these factors affect clinical outcomes. Biopsychosocial treatments acknowledge and address the biological, psychological and social contributions to pain and disability are currently seen as the most efficacious approach to chronic pain. Addressing and modulating these factors are crucial in the pathway of personalised treatments in tendinopathy and offer a real opportunity to drive positive outcomes in patients. In this education review, we also provide the current evidence-based guidance on psychological and psychosocial developments in musculoskeletal medicine and how these may be translated to treating tendinopathy using a biopsychosocial model.
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Affiliation(s)
- Nathan Edgar
- Institute of Infection, Immunity and Inflammation College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Christopher Clifford
- Institute of Infection, Immunity and Inflammation College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK,Department of Physiotherapy, NHS Greater Glasgow and Clyde, Glasgow, UK
| | - Seth O'Neill
- Department of Physiotherapy, School of Allied Health Professionals, University of Leicester, Leicester, UK
| | - Carles Pedret
- Sports Medicine and Imaging Department, Clinica Mapfre de Medicina del Tenis C/Muntaner, Barcelona, Spain
| | - Paul Kirwan
- Discipline of Physiotherapy, Trinity College Dublin School of Medicine, Dublin, Ireland
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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Docherty S, Harley R, McAuley JJ, Crowe LAN, Pedret C, Kirwan PD, Siebert S, Millar NL. The effect of exercise on cytokines: implications for musculoskeletal health: a narrative review. BMC Sports Sci Med Rehabil 2022; 14:5. [PMID: 34991697 PMCID: PMC8740100 DOI: 10.1186/s13102-022-00397-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 12/31/2021] [Indexed: 02/07/2023]
Abstract
The physiological effects of physical exercise are ubiquitously reported as beneficial to the cardiovascular and musculoskeletal systems. Exercise is widely promoted by medical professionals to aid both physical and emotional wellbeing; however, mechanisms through which this is achieved are less well understood. Despite numerous beneficial attributes, certain types of exercise can inflict significant significant physiological stress. Several studies document a key relationship between exercise and immune activation. Activation of the innate immune system occurs in response to exercise and it is proposed this is largely mediated by cytokine signalling. Cytokines are typically classified according to their inflammatory properties and evidence has shown that cytokines expressed in response to exercise are diverse and may act to propagate, modulate or mitigate inflammation in musculoskeletal health. The review summarizes the existing literature on the relationship between exercise and the immune system with emphasis on how exercise-induced cytokine expression modulates inflammation and the immune response.
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Affiliation(s)
- Sophie Docherty
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 120 University Avenue, Glasgow, G12 8TA, Scotland, UK
| | - Rachael Harley
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 120 University Avenue, Glasgow, G12 8TA, Scotland, UK
| | - Joseph J McAuley
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 120 University Avenue, Glasgow, G12 8TA, Scotland, UK
| | - Lindsay A N Crowe
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 120 University Avenue, Glasgow, G12 8TA, Scotland, UK
| | - Carles Pedret
- Sports Medicine and Imaging Department, Clinica Diagonal, C/Sant Mateu 24-26, 08950, Esplugues de Llobregat, Spain
| | - Paul D Kirwan
- School of Physiotherapy, Royal College of Surgeons in Ireland, Dublin, Ireland
- Physiotherapy Department, Connolly Hospital, Dublin, Ireland
| | - Stefan Siebert
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 120 University Avenue, Glasgow, G12 8TA, Scotland, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 120 University Avenue, Glasgow, G12 8TA, Scotland, UK.
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12
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Challoumas D, Pedret C, Biddle M, Ng NYB, Kirwan P, Cooper B, Nicholas P, Wilson S, Clifford C, Millar NL. Management of patellar tendinopathy: a systematic review and network meta-analysis of randomised studies. BMJ Open Sport Exerc Med 2021; 7:e001110. [PMID: 34900334 PMCID: PMC8634001 DOI: 10.1136/bmjsem-2021-001110] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/15/2021] [Indexed: 11/24/2022] Open
Abstract
Objectives We performed a systematic review and network meta-analysis (NMA) of randomised controlled trials (RCTs) to provide insights into the effectiveness of available treatment modalities in patellar tendinopathy(PT). Methods Several databases were searched in May 2021 for RCTs assessing the effectiveness of any intervention compared with any other intervention, placebo or no treatment for pain and/or function in PT. The risk of bias and strength of evidence were assessed with the Cochrane Collaboration and GRADE (Grading of Recommendations, Assessment, Development and Evaluations)/GRADE-NMA tools. Results A total of 37 RCTs were eligible that assessed 33 different interventions and their combinations, most represented by single studies. Based on pairwise meta-analyses of two RCTs, extracorporeal shockwave therapy (ESWT) does not appear to be superior to sham ESWT (eccentric exercise in both groups) for short-term pain (mean differences (MD) +0.1, 95% CI (−0.8 to 1), p=0.84) or function (MD −1.8, 95% CI (–8 to 4.4), p=0.57). Based on a pairwise meta-analysis of three RCTs, isometric exercise appears as effective as isotonic exercise for immediate postintervention pain relief (MD −1.03, 95% CI (−2.6 to 0.5), p=0.19). Our NMA showed that topical glyceryl trinitrate (GTN) and hyaluronic acid injection, both combined with eccentric exercise and moderate, slow resistance exercise had the highest probability of being the most effective interventions (low/very low strength of evidence). Conclusions Promising interventions with inadequate evidence, such as topical GTN, hyaluronic acid injections and isometric and slow resistance exercise, should be further investigated through high-quality RCTs. Meanwhile, eccentric loading with or without adjuncts should remain the first-line treatment for all individuals with patellar tendinopathy.
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Affiliation(s)
- Dimitris Challoumas
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Carles Pedret
- Sports Medicine and Imaging Department, Clinica Mapfre de Medicina del Tenis, Barcelona, Spain
| | - Mairiosa Biddle
- Department of Trauma & Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UK
| | - Nigel Yong Boon Ng
- Department of Trauma & Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UK
| | - Paul Kirwan
- School of Physiotherapy, Royal College of Surgeons in Ireland, Dublin, Ireland.,Physiotherapy Department, Connolly Hospital Blanchardstown, Blanchardstown, Ireland
| | - Blair Cooper
- Department of Trauma & Orthopaedic Surgery, Ayr University Hospital, Ayr, UK
| | - Patrick Nicholas
- Department of Trauma & Orthopaedic Surgery, Ayr University Hospital, Ayr, UK
| | - Scott Wilson
- Department of Trauma & Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UK
| | - Chris Clifford
- Physiotherapy Department, NHS Greater Glasgow and Clyde, Glasgow, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK.,Department of Trauma & Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UK
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13
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Shi Z, Garcia-Melchor E, Wu X, Getschman AE, Nguyen M, Rowland DJ, Wilson M, Sunzini F, Akbar M, Huynh M, Law T, Kundu-Raychaudhuri SK, Raychaudhuri SP, Volkman BF, Millar NL, Hwang ST. Targeting the CCR6/CCL20 axis in entheseal and cutaneous inflammation. Arthritis Rheumatol 2021; 73:2271-2281. [PMID: 34081845 DOI: 10.1002/art.41882] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 07/29/2020] [Accepted: 05/18/2021] [Indexed: 11/12/2022]
Abstract
OBJECTIVES To assess the involvement of the CCR6/CCL20 axis in psoriatic arthritis (PsA) and psoriasis (PsO) and to evaluate its potential as a therapeutic target. METHODS First, we quantified CCL20 levels in peripheral blood and synovial fluid of PsA patients and the presence of CCR6+ cells in synovial and tendon tissue. Utilizing an IL-23 minicircle DNA (MC) mouse model exhibiting key features of both PsO and PsA, we investigated CCR6 and CCL20 expression and the preventive and therapeutical effect of CCL20 blockade. Healthy tendon stromal cells were stimulated in vitro with IL-1β to assess the production of CCL20 by qPCR and ELISA. The effect of conditioned media from stimulated tenocytes in inducing T cell migration was interrogated with a transwell system. RESULTS We observed an upregulation of both CCR6 and CCL20 in the enthesis of IL-23 MC-treated mice, which was confirmed in human biopsies. Specific targeting of the CCR6/CCL20 axis with a CCL20 locked dimer (CCL20LD) blocked entheseal inflammation, leading to profound reductions in clinical and proinflammatory markers in the joints and skin of IL-23 MC-treated mice. The stromal compartment in the tendon was the main source of CCL20 in this model and accordingly, in vitro activated human tendon cells were able to produce this chemokine and to induce CCR6+ T cell migration, the latter of which could be blocked by CCL20LD. CONCLUSIONS Our studies highlight the pathogenic role of CCR6-CCL20 axis in enthesitis and raise the prospect of a novel therapeutic approach for treating patients with PsO and PsA.
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Affiliation(s)
- Zhenrui Shi
- Department of Dermatology, University of California, Davis, Sacramento, CA, USA.,Department of Dermatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, China
| | - Emma Garcia-Melchor
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, UK
| | - Xuesong Wu
- Department of Dermatology, University of California, Davis, Sacramento, CA, USA
| | | | - Mimi Nguyen
- Department of Dermatology, University of California, Davis, Sacramento, CA, USA
| | - Douglas J Rowland
- Center for Molecular and Genomic Imaging, University of California, Davis, Sacramento, CA, USA
| | - Machelle Wilson
- Division of Biostatistics, Clinical and Translational Science Center, University of California, Davis, Sacramento, CA, USA
| | - Flavia Sunzini
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, UK
| | - Moeed Akbar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, UK
| | - Mindy Huynh
- Department of Dermatology, University of California, Davis, Sacramento, CA, USA
| | - Timothy Law
- Department of Dermatology, University of California, Davis, Sacramento, CA, USA
| | - Smriti K Kundu-Raychaudhuri
- Department of Internal Medicine, Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, CA, USA
| | - Siba P Raychaudhuri
- Department of Internal Medicine, Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, CA, USA
| | - Brian F Volkman
- Department of Biochemistry, Medical College of Wisconsin, WI, USA
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, UK
| | - Sam T Hwang
- Department of Dermatology, University of California, Davis, Sacramento, CA, USA
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14
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Akbar M, MacDonald L, Crowe LAN, Carlberg K, Kurowska-Stolarska M, Ståhl PL, Snelling SJB, McInnes IB, Millar NL. Single cell and spatial transcriptomics in human tendon disease indicate dysregulated immune homeostasis. Ann Rheum Dis 2021; 80:1494-1497. [PMID: 34001518 PMCID: PMC8522454 DOI: 10.1136/annrheumdis-2021-220256] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 05/05/2021] [Indexed: 01/16/2023]
Affiliation(s)
- Moeed Akbar
- Institute of Infection, Immunity and Inflammation, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Lucy MacDonald
- Institute of Infection, Immunity and Inflammation, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.,Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), University of Glasgow, Glasgow, UK
| | - Lindsay A N Crowe
- Institute of Infection, Immunity and Inflammation, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Konstantin Carlberg
- Science for Life Laboratory, Dept. of Gene Technology, KTH Royal Institute of Technology, Solna, Sweden
| | - Mariola Kurowska-Stolarska
- Institute of Infection, Immunity and Inflammation, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.,Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), University of Glasgow, Glasgow, UK
| | - Patrik L Ståhl
- Science for Life Laboratory, Dept. of Gene Technology, KTH Royal Institute of Technology, Solna, Sweden
| | - Sarah J B Snelling
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Iain B McInnes
- Institute of Infection, Immunity and Inflammation, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.,Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), University of Glasgow, Glasgow, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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15
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Crowe LAN, Garcia Melchor E, Murrell GAC, McInnes IB, Akbar M, Millar NL. Cover Image. Transl Sports Med 2021. [DOI: 10.1002/tsm2.241] [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: 11/07/2022]
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16
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Challoumas D, Millar NL. Do we need to improve the reporting of evidence in tendinopathy management? A critical appraisal of systematic reviews with recommendations on strength of evidence assessment. BMJ Open Sport Exerc Med 2021; 7:e000920. [PMID: 33692904 PMCID: PMC7907875 DOI: 10.1136/bmjsem-2020-000920] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/02/2021] [Indexed: 11/23/2022] Open
Abstract
Objective To critically appraise the quality of published systematic reviews (SRs) of randomised controlled trials (RCTs) in tendinopathy with regard to handling and reporting of results with special emphasis on strength of evidence assessment. Data sources Medline from inception to June 2020. Study eligibility All SRs of RCTs assessing the effectiveness of any intervention(s) on any location of tendinopathy. Data extraction and synthesis Included SRs were appraised with the use of a 12-item tool devised by the authors arising from the Preferred Reporting Items in Systematic Reviews and Meta-Analyses statement and other relevant guidance. Subgroup analyses were performed based on impact factor (IF) of publishing journals and date of publication. Results A total of 57 SRs were included published in 38 journals between 2006 and 2020. The most commonly used risk-of-bias (RoB) assessment tool and strength of evidence assessment tool were the Cochrane Collaboration RoB tool and the Cochrane Collaboration Back Review Group tool, respectively. The mean score on the appraisal tool was 46.5% (range 0%–100%). SRs published in higher IF journals (>4.7) were associated with a higher mean score than those in lower IF journals (mean difference 26.4%±8.8%, p=0.004). The mean score of the 10 most recently published SRs was similar to that of the first 10 published SRs (mean difference 8.3%±13.7%, p=0.54). Only 23 SRs (40%) used the results of their RoB assessment in data synthesis and more than half (n=30; 50%) did not assess the strength of evidence of their results. Only 12 SRs (21%) assessed their strength of evidence appropriately. Conclusions In light of the poor presentation of evidence identified by our review, we provide recommendations to increase transparency and reproducibility in future SRs.
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Affiliation(s)
- Dimitris Challoumas
- Institute of Infection, Immunity and Inflammation College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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17
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Garcia-Melchor E, Cafaro G, MacDonald L, Crowe LAN, Sood S, McLean M, Fazzi UG, McInnes IB, Akbar M, Millar NL. Novel self-amplificatory loop between T cells and tenocytes as a driver of chronicity in tendon disease. Ann Rheum Dis 2021; 80:1075-1085. [PMID: 33692018 PMCID: PMC8292554 DOI: 10.1136/annrheumdis-2020-219335] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 02/17/2021] [Accepted: 02/17/2021] [Indexed: 12/13/2022]
Abstract
OBJECTIVES Increasing evidence suggests that inflammatory mechanisms play a key role in chronic tendon disease. After observing T cell signatures in human tendinopathy, we explored the interaction between T cells and tendon stromal cells or tenocytes to define their functional contribution to tissue remodelling and inflammation amplification and hence disease perpetuation. METHODS T cells were quantified and characterised in healthy and tendinopathic tissues by flow cytometry (FACS), imaging mass cytometry (IMC) and single cell RNA-seq. Tenocyte activation induced by conditioned media from primary damaged tendon or interleukin-1β was evaluated by qPCR. The role of tenocytes in regulating T cell migration was interrogated in a standard transwell membrane system. T cell activation (cell surface markers by FACS and cytokine release by ELISA) and changes in gene expression in tenocytes (qPCR) were assessed in cocultures of T cells and explanted tenocytes. RESULTS Significant quantitative differences were observed in healthy compared with tendinopathic tissues. IMC showed T cells in close proximity to tenocytes, suggesting tenocyte-T cell interactions. On activation, tenocytes upregulated inflammatory cytokines, chemokines and adhesion molecules implicated in T cell recruitment and activation. Conditioned media from activated tenocytes induced T cell migration and coculture of tenocytes with T cells resulted in reciprocal activation of T cells. In turn, these activated T cells upregulated production of inflammatory mediators in tenocytes, while increasing the pathogenic collagen 3/collagen 1 ratio. CONCLUSIONS Interaction between T cells and tenocytes induces the expression of inflammatory cytokines/chemokines in tenocytes, alters collagen composition favouring collagen 3 and self-amplifies T cell activation via an auto-regulatory feedback loop. Selectively targeting this adaptive/stromal interface may provide novel translational strategies in the management of human tendon disorders.
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Affiliation(s)
- Emma Garcia-Melchor
- Institute of Infection, Immunity and Inflammation, University of Glasgow College of Medical Veterinary and Life Sciences, Glasgow, UK
| | - Giacomo Cafaro
- Rheumatology Unit - Department of Medicine, University of Perugia, Perugia, Italy
| | - Lucy MacDonald
- Institute of Infection, Immunity and Inflammation, University of Glasgow College of Medical Veterinary and Life Sciences, Glasgow, UK
| | - Lindsay A N Crowe
- Institute of Infection, Immunity and Inflammation, University of Glasgow College of Medical Veterinary and Life Sciences, Glasgow, UK
| | - Shatakshi Sood
- Institute of Infection, Immunity and Inflammation, University of Glasgow College of Medical Veterinary and Life Sciences, Glasgow, UK
| | - Michael McLean
- Institute of Infection, Immunity and Inflammation, University of Glasgow College of Medical Veterinary and Life Sciences, Glasgow, UK
| | - Umberto G Fazzi
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UK
| | - Iain B McInnes
- Institute of Infection, Immunity and Inflammation, University of Glasgow College of Medical Veterinary and Life Sciences, Glasgow, UK
| | - Moeed Akbar
- Institute of Infection, Immunity and Inflammation, University of Glasgow College of Medical Veterinary and Life Sciences, Glasgow, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, University of Glasgow College of Medical Veterinary and Life Sciences, Glasgow, UK .,Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UK
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18
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Affiliation(s)
- Neal L Millar
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK.
| | | | - Kristian Thorborg
- Institute of Clinical Medicine, Copenhagen University, Copenhagen, Denmark
| | - Paul D Kirwan
- School of Physiotherapy, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Leesa M Galatz
- Department of Orthopaedic Surgery, Icahn School of Medicine, Mount Sinai Health System, New York, NY, USA
| | - Geoffrey D Abrams
- Department of Orthopaedic Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | | | - Iain B McInnes
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
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19
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Atherton CM, Spencer SJ, McCall K, Garcia-Melchor E, Leach WJ, Mullen M, Rooney BP, Walker C, McInnes IB, Millar NL, Akbar M. Vancomycin Wrap for Anterior Cruciate Ligament Surgery: Molecular Insights. Am J Sports Med 2021; 49:426-434. [PMID: 33406371 PMCID: PMC7859666 DOI: 10.1177/0363546520981570] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 09/23/2020] [Indexed: 01/31/2023]
Abstract
BACKGROUND The use of the vancomycin wrap to pretreat the hamstring graft in anterior cruciate ligament reconstruction (ACLR) has grown in popularity since it was first described in 2012 and has significantly reduced rates of postoperative infection. However, it remains unknown if this antibiotic treatment affects the molecular composition of the graft. PURPOSE To establish whether treatment with vancomycin at 5 mg/mL, the most commonly used concentration, alters the molecular function of the hamstring graft in ACLR. STUDY DESIGN Controlled laboratory study. METHODS Surplus hamstring tendon collected after routine ACLR surgery was used for in vitro cell culture and ex vivo tissue experiments. Vancomycin was used at 5 mg/mL in RPMI or saline diluent to treat cells and tendon tissue, respectively, with diluent control conditions. Cell viability at 30, 60, and 120 minutes was assessed via colorimetric viability assay. Tendon cells treated with control and experimental conditions for 1 hour was evaluated using semiquantitative reverse transcription analysis, immunohistochemistry staining, and protein quantitation via enzyme-linked immunosorbent assay for changes in apoptotic, matrix, and inflammatory gene and protein expression. RESULTS Vancomycin treatment at 5 mg/mL significantly reduced tenocyte viability in vitro after 60 minutes of treatment (P < .05); however, this was not sustained at 120 minutes. Vancomycin-treated tendon tissue showed no significant increase in apoptotic gene expression, or apoptotic protein levels in tissue or supernatant, ex vivo. Vancomycin was associated with a reduction in inflammatory proteins from treated tendon supernatants (IL-6; P < .05). CONCLUSION Vancomycin did not significantly alter the molecular structure of the hamstring graft. Reductions in matrix protein and inflammatory cytokine release point to a potential beneficial effect of vancomycin in generating a homeostatic environment. CLINICAL RELEVANCE Vancomycin ACL wrap does not alter the molecular structure of the ACL hamstring graft and may improve graft integrity.
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Affiliation(s)
- Caroline M. Atherton
- Institute of Infection, Immunity and
Inflammation, College of Medicine, Veterinary and Life Sciences University of
Glasgow, Glasgow, UK
- Department of Orthopaedic Surgery, Queen
Elizabeth University Hospital Glasgow, Glasgow, UK
| | - Simon J. Spencer
- Department of Orthopaedic Surgery, Queen
Elizabeth University Hospital Glasgow, Glasgow, UK
| | - Katy McCall
- Institute of Infection, Immunity and
Inflammation, College of Medicine, Veterinary and Life Sciences University of
Glasgow, Glasgow, UK
| | - Emma Garcia-Melchor
- Institute of Infection, Immunity and
Inflammation, College of Medicine, Veterinary and Life Sciences University of
Glasgow, Glasgow, UK
| | - William J. Leach
- Department of Orthopaedic Surgery, Queen
Elizabeth University Hospital Glasgow, Glasgow, UK
| | - Michael Mullen
- Department of Orthopaedic Surgery, Queen
Elizabeth University Hospital Glasgow, Glasgow, UK
| | - Brian P. Rooney
- Department of Orthopaedic Surgery, Queen
Elizabeth University Hospital Glasgow, Glasgow, UK
| | - Colin Walker
- Department of Orthopaedic Surgery, Queen
Elizabeth University Hospital Glasgow, Glasgow, UK
| | - Iain B. McInnes
- Institute of Infection, Immunity and
Inflammation, College of Medicine, Veterinary and Life Sciences University of
Glasgow, Glasgow, UK
| | - Neal L. Millar
- Institute of Infection, Immunity and
Inflammation, College of Medicine, Veterinary and Life Sciences University of
Glasgow, Glasgow, UK
- Department of Orthopaedic Surgery, Queen
Elizabeth University Hospital Glasgow, Glasgow, UK
| | - Moeed Akbar
- Institute of Infection, Immunity and
Inflammation, College of Medicine, Veterinary and Life Sciences University of
Glasgow, Glasgow, UK
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20
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Shi Z, Wu X, Santos Rocha C, Rolston M, Garcia-Melchor E, Huynh M, Nguyen M, Law T, Haas KN, Yamada D, Millar NL, Wan YJY, Dandekar S, Hwang ST. Short-Term Western Diet Intake Promotes IL-23‒Mediated Skin and Joint Inflammation Accompanied by Changes to the Gut Microbiota in Mice. J Invest Dermatol 2021; 141:1780-1791. [PMID: 33485880 DOI: 10.1016/j.jid.2020.11.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 11/26/2020] [Accepted: 11/27/2020] [Indexed: 02/08/2023]
Abstract
We previously showed that exposure to a high-sugar and moderate-fat diet (i.e., Western diet [WD]) in mice induces appreciable skin inflammation and enhances the susceptibility to imiquimod-induced psoriasiform dermatitis, suggesting that dietary components may render the skin susceptible to psoriatic inflammation. In this study, utilizing an IL-23 minicircle-based model with features of both psoriasiform dermatitis and psoriatic arthritis, we showed that intake of WD for 10 weeks predisposed mice not only to skin but also to joint inflammation. Both WD-induced skin and joint injuries were associated with an expansion of IL-17A‒producing γδ T cells and increased expression of T helper type 17 cytokines. After IL-23 minicircle delivery, WD-fed mice had reduced microbial diversity and pronounced dysbiosis. Treatment with broad-spectrum antibiotics suppressed IL-23‒mediated skin and joint inflammation in the WD-fed mice. Strikingly, reduced skin and joint inflammation with a partial reversion of the gut microbiota were noted when mice switched from a WD to a standard diet after IL-23 minicircle delivery. These findings reveal that a short-term WD intake‒induced dysbiosis is accompanied by enhanced psoriasis-like skin and joint inflammation. Modifications toward a healthier dietary pattern should be considered in patients with psoriatic skin and/or joint disease.
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Affiliation(s)
- Zhenrui Shi
- Department of Dermatology, University of California Davis School of Medicine, Sacramento, California, USA; Department of Dermatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xuesong Wu
- Department of Dermatology, University of California Davis School of Medicine, Sacramento, California, USA
| | - Clarissa Santos Rocha
- Department of Medical Microbiology and Immunology, University of California Davis School of Medicine, Sacramento, California, USA
| | - Matthew Rolston
- Department of Medical Microbiology and Immunology, University of California Davis School of Medicine, Sacramento, California, USA
| | - Emma Garcia-Melchor
- Institute of Infection, Immunity & Inflammation, College of Medicine, Veterinary & Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Mindy Huynh
- Department of Dermatology, University of California Davis School of Medicine, Sacramento, California, USA
| | - Mimi Nguyen
- Department of Dermatology, University of California Davis School of Medicine, Sacramento, California, USA
| | - Timothy Law
- Department of Dermatology, University of California Davis School of Medicine, Sacramento, California, USA
| | - Kelly N Haas
- Biology Department, University of Massachusetts Amherst, Amherst, Massachusetts, USA
| | - Daisuke Yamada
- Department of Dermatology, University of California Davis School of Medicine, Sacramento, California, USA
| | - Neal L Millar
- Institute of Infection, Immunity & Inflammation, College of Medicine, Veterinary & Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Yu-Jui Yvonne Wan
- Department of Medical Pathology and Laboratory Medicine, University of California Davis School of Medicine, Sacramento, California, USA
| | - Satya Dandekar
- Department of Medical Microbiology and Immunology, University of California Davis School of Medicine, Sacramento, California, USA
| | - Samuel T Hwang
- Department of Dermatology, University of California Davis School of Medicine, Sacramento, California, USA.
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Abstract
Tendinopathy describes a complex multifaceted pathology of the tendon, characterized by pain, decline in function and reduced exercise tolerance. The most common overuse tendinopathies involve the rotator cuff tendon, medial and lateral elbow epicondyles, patellar tendon, gluteal tendons and the Achilles tendon. The prominent histological and molecular features of tendinopathy include disorganization of collagen fibres, an increase in the microvasculature and sensory nerve innervation, dysregulated extracellular matrix homeostasis, increased immune cells and inflammatory mediators, and enhanced cellular apoptosis. Although diagnosis is mostly achieved based on clinical symptoms, in some cases, additional pain-provoking tests and imaging might be necessary. Management consists of different exercise and loading programmes, therapeutic modalities and surgical interventions; however, their effectiveness remains ambiguous. Future research should focus on elucidating the key functional pathways implicated in clinical disease and on improved rehabilitation protocols.
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Affiliation(s)
- Neal L Millar
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK.
| | | | - Kristian Thorborg
- Institute of Clinical Medicine, Copenhagen University, Copenhagen, Denmark
| | - Paul D Kirwan
- School of Physiotherapy, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Leesa M Galatz
- Department of Orthopaedic Surgery, Icahn School of Medicine, Mount Sinai Health System, New York, NY, USA
| | - Geoffrey D Abrams
- Department of Orthopaedic Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | | | - Iain B McInnes
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
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Akbar M, Edgar N, Murray E, Aydin R, Millar NL. Basic Science of Tendinopathy and Novel Treatments: An Update. Instr Course Lect 2021; 70:551-562. [PMID: 33438935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Tendinopathy describes a spectrum of degenerative and inflammatory changes occurring in tendons, usually caused by mechanical loading. It is associated with pain and reduced function and can often lead to tendon rupture. Although advances have been made in recent years, it remains challenging to manage tendinopathy because its definition and the understanding of its risk factors and pathophysiology are still evolving. The objective of this chapter is to present current ideas on the basic science of tendinopathy and in particular new findings in regard to pathophysiology. Current therapies and insights into potential novel therapies for tendinopathy are also discussed.
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Abstract
IMPORTANCE There are a myriad of available treatment options for patients with frozen shoulder, which can be overwhelming to the treating health care professional. OBJECTIVE To assess and compare the effectiveness of available treatment options for frozen shoulder to guide musculoskeletal practitioners and inform guidelines. DATA SOURCES Medline, EMBASE, Scopus, and CINHAL were searched in February 2020. STUDY SELECTION Studies with a randomized design of any type that compared treatment modalities for frozen shoulder with other modalities, placebo, or no treatment were included. DATA EXTRACTION AND SYNTHESIS Data were independently extracted by 2 individuals. This study followed the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) reporting guideline. Random-effects models were used. MAIN OUTCOMES AND MEASURES Pain and function were the primary outcomes, and external rotation range of movement (ER ROM) was the secondary outcome. Results of pairwise meta-analyses were presented as mean differences (MDs) for pain and ER ROM and standardized mean differences (SMDs) for function. Length of follow-up was divided into short-term (≤12 weeks), mid-term (>12 weeks to ≤12 months), and long-term (>12 months) follow-up. RESULTS From a total of 65 eligible studies with 4097 participants that were included in the systematic review, 34 studies with 2402 participants were included in pairwise meta-analyses and 39 studies with 2736 participants in network meta-analyses. Despite several statistically significant results in pairwise meta-analyses, only the administration of intra-articular (IA) corticosteroid was associated with statistical and clinical superiority compared with other interventions in the short-term for pain (vs no treatment or placebo: MD, -1.0 visual analog scale [VAS] point; 95% CI, -1.5 to -0.5 VAS points; P < .001; vs physiotherapy: MD, -1.1 VAS points; 95% CI, -1.7 to -0.5 VAS points; P < .001) and function (vs no treatment or placebo: SMD, 0.6; 95% CI, 0.3 to 0.9; P < .001; vs physiotherapy: SMD 0.5; 95% CI, 0.2 to 0.7; P < .001). Subgroup analyses and the network meta-analysis demonstrated that the addition of a home exercise program with simple exercises and stretches and physiotherapy (electrotherapy and/or mobilizations) to IA corticosteroid may be associated with added benefits in the mid-term (eg, pain for IA coritocosteriod with home exercise vs no treatment or placebo: MD, -1.4 VAS points; 95% CI, -1.8 to -1.1 VAS points; P < .001). CONCLUSIONS AND RELEVANCE The findings of this study suggest that the early use of IA corticosteroid in patients with frozen shoulder of less than 1-year duration is associated with better outcomes. This treatment should be accompanied by a home exercise program to maximize the chance of recovery.
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Affiliation(s)
- Dimitris Challoumas
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Scotland, United Kingdom
| | - Mairiosa Biddle
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Scotland, United Kingdom
| | - Michael McLean
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Scotland, United Kingdom
| | - Neal L. Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Scotland, United Kingdom
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Shi Z, Garcia-Melchor E, Wu X, Yu S, Nguyen M, Rowland DJ, Huynh M, Law T, Raychaudhuri SP, Millar NL, Hwang ST. Differential Requirement for CCR6 in IL-23-Mediated Skin and Joint Inflammation. J Invest Dermatol 2020; 140:2386-2397. [PMID: 32339538 DOI: 10.1016/j.jid.2020.03.965] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 02/23/2020] [Accepted: 03/02/2020] [Indexed: 01/29/2023]
Abstract
CCR6 is important for the trafficking of IL-17A-producing γδ T cells and required for the development of psoriasiform dermatitis in an IL-23 intradermal injection model. The role of CCR6, however, in IL-23-mediated joint inflammation is unclear. We herein hydrodynamically delivered IL-23 minicircle DNA into wild-type and CCR6-deficient (CCR6-knockout) mice to induce overexpression of IL-23 systemically. After IL-23 gene transfer, wild-type mice exhibited concurrent skin and joint changes that recapitulate some features found in human psoriatic skin and joints. CCR6-knockout mice were resistant to IL-23-induced skin inflammation but exhibited no changes in joint inflammation compared with wild-type mice. Depletion of neutrophils protected wild-type mice from skin and joint disease without suppressing T helper type 17 cytokine expression. In contrast, mice lacking γδ T cells showed a partial reduction in neutrophilic recruitment and a significant decrease in IL-17A expression in skin and paw tissue. Thus, in an IL-23-mediated model that allows concurrent assessment of both skin and joint disease, we showed that CCR6 is critical for inflammation in the skin but not in the joint. Furthermore, our data suggest that neutrophils and γδ T cells are key effector cells in IL-23-mediated skin and joint inflammation in mice.
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Affiliation(s)
- Zhenrui Shi
- Department of Dermatology, University of California, Davis, Sacramento, California, USA; Department of Dermatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Emma Garcia-Melchor
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University Of Glasgow, Glasgow, United Kingdom
| | - Xuesong Wu
- Department of Dermatology, University of California, Davis, Sacramento, California, USA
| | - Sebastian Yu
- Department of Dermatology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Mimi Nguyen
- Department of Dermatology, University of California, Davis, Sacramento, California, USA
| | - Douglas J Rowland
- Center for Molecular and Genomic Imaging, University of California, Davis, Davis, California, USA
| | - Mindy Huynh
- Department of Dermatology, University of California, Davis, Sacramento, California, USA
| | - Timothy Law
- Department of Dermatology, University of California, Davis, Sacramento, California, USA
| | - Siba P Raychaudhuri
- Division of Rheumatology, Allergy and Clinical Immunology, Department of Internal Medicine, University of California at Davis, Sacramento, California, USA
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University Of Glasgow, Glasgow, United Kingdom
| | - Samuel T Hwang
- Department of Dermatology, University of California, Davis, Sacramento, California, USA.
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Abstract
Tendinopathy refers to the clinical diagnosis of activity-related pain resulting in a decline in tendon function. In the last few years, much has been published concerning the basic science and clinical investigation of tendinopathy and debates and discussions to new questions and points of view started many years ago. This advances review will discuss the current thinking on the basic science and clinical management of tendinopathy and in particular new findings in the tendon repair space that are relevant to the pathophysiology of tendinopathy. We will further discuss potential novel therapies on the horizon in human tendon disease.
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Affiliation(s)
- Dimitris Challoumas
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, The University of Glasgow, Glasgow, UK
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, NHS Greater Glasgow and Clyde, Glasgow, UK
| | - Mairiosa Biddle
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, NHS Greater Glasgow and Clyde, Glasgow, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, The University of Glasgow, Glasgow, UK
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, NHS Greater Glasgow and Clyde, Glasgow, UK
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26
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Crowe LAN, Garcia Melchor E, Murrell GAC, McInnes IB, Akbar M, Millar NL. Stromal “activation” markers do not confer pathogenic activity in tendinopathy. Transl Sports Med 2020. [DOI: 10.1002/tsm2.204] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Lindsay A. N. Crowe
- Institute of Infection, Immunity and Inflammation College of Medicine, Veterinary and Life Sciences University of Glasgow Glasgow UK
| | - Emma Garcia Melchor
- Institute of Infection, Immunity and Inflammation College of Medicine, Veterinary and Life Sciences University of Glasgow Glasgow UK
| | - George A. C. Murrell
- Orthopaedic Research Institute St George Hospital Campus University of New South Wales Sydney NSW Australia
| | - Iain B. McInnes
- Institute of Infection, Immunity and Inflammation College of Medicine, Veterinary and Life Sciences University of Glasgow Glasgow UK
| | - Moeed Akbar
- Institute of Infection, Immunity and Inflammation College of Medicine, Veterinary and Life Sciences University of Glasgow Glasgow UK
| | - Neal L. Millar
- Institute of Infection, Immunity and Inflammation College of Medicine, Veterinary and Life Sciences University of Glasgow Glasgow UK
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27
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Challoumas D, Millar NL. Risk of bias in systematic reviews of tendinopathy management: Are we comparing apples with oranges? Transl Sports Med 2020. [DOI: 10.1002/tsm2.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dimitris Challoumas
- Institute of Infection, Immunity and Inflammation College of Medicine, Veterinary and Life Sciences University of Glasgow Glasgow UK
| | - Neal L. Millar
- Institute of Infection, Immunity and Inflammation College of Medicine, Veterinary and Life Sciences University of Glasgow Glasgow UK
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28
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Clifford C, Challoumas D, Paul L, Syme G, Millar NL. Effectiveness of isometric exercise in the management of tendinopathy: a systematic review and meta-analysis of randomised trials. BMJ Open Sport Exerc Med 2020; 6:e000760. [PMID: 32818059 PMCID: PMC7406028 DOI: 10.1136/bmjsem-2020-000760] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/02/2020] [Indexed: 12/16/2022] Open
Abstract
Objective To systematically review and critically appraise the literature on the effectiveness of isometric exercise in comparison with other treatment strategies or no treatment in tendinopathy. Design A systematic review and meta-analysis of randomised controlled trials. Data sources Electronic searches of Medline, Cumulative Index to Nursing and Allied Health Literature, EMBASE and Cochrane were undertaken from inception to May 2020. Methods Overall quality of each study was determined based on a combined assessment of internal validity, external validity and precision. For each outcome measure, level of evidence was rated based on the system by van Tulder et al. Results Ten studies were identified and included in the review, including participants with patellar (n=4), rotator cuff (n=2), lateral elbow (n=2), Achilles (n=1) and gluteal (n=1) tendinopathies. Three were of good and seven were of poor overall quality. Based on limited evidence (level 3), isometric exercise was not superior to isotonic exercise for chronic tendinopathy either immediately following treatment or in the short term (≤12 weeks) for any of the investigated outcome measures. Additionally, for acute rotator cuff tendinopathy, isometric exercise appears to be no more effective than ice therapy in the short term (limited evidence; level 3). Summary Isometric exercise does not appear to be superior to isotonic exercise in the management of chronic tendinopathy. The response to isometric exercise is variable both within and across tendinopathy populations. Isometric exercise can be used as part of a progressive loading programme as it may be beneficial for selected individuals. PROSPERO registration number CRD42019147179.
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Affiliation(s)
- Christopher Clifford
- Department of Physiotherapy, NHS Greater Glasgow and Clyde, Glasgow, UK.,Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Dimitris Challoumas
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Lorna Paul
- School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, UK
| | - Grant Syme
- Department of Physiotherapy, NHS Fife, Kirkcaldy, Fife, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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29
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Alivernini S, MacDonald L, Elmesmari A, Finlay S, Tolusso B, Gigante MR, Petricca L, Di Mario C, Bui L, Perniola S, Attar M, Gessi M, Fedele AL, Chilaka S, Somma D, Sansom SN, Filer A, McSharry C, Millar NL, Kirschner K, Nerviani A, Lewis MJ, Pitzalis C, Clark AR, Ferraccioli G, Udalova I, Buckley CD, Gremese E, McInnes IB, Otto TD, Kurowska-Stolarska M. Distinct synovial tissue macrophage subsets regulate inflammation and remission in rheumatoid arthritis. Nat Med 2020; 26:1295-1306. [PMID: 32601335 DOI: 10.1038/s41591-020-0939-8] [Citation(s) in RCA: 268] [Impact Index Per Article: 67.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 05/12/2020] [Indexed: 12/28/2022]
Abstract
Immune-regulatory mechanisms of drug-free remission in rheumatoid arthritis (RA) are unknown. We hypothesized that synovial tissue macrophages (STM), which persist in remission, contribute to joint homeostasis. We used single-cell transcriptomics to profile 32,000 STMs and identified phenotypic changes in patients with early/active RA, treatment-refractory/active RA and RA in sustained remission. Each clinical state was characterized by different frequencies of nine discrete phenotypic clusters within four distinct STM subpopulations with diverse homeostatic, regulatory and inflammatory functions. This cellular atlas, combined with deep-phenotypic, spatial and functional analyses of synovial biopsy fluorescent activated cell sorted STMs, revealed two STM subpopulations (MerTKposTREM2high and MerTKposLYVE1pos) with unique remission transcriptomic signatures enriched in negative regulators of inflammation. These STMs were potent producers of inflammation-resolving lipid mediators and induced the repair response of synovial fibroblasts in vitro. A low proportion of MerTKpos STMs in remission was associated with increased risk of disease flare after treatment cessation. Therapeutic modulation of MerTKpos STM subpopulations could therefore be a potential treatment strategy for RA.
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MESH Headings
- Arthritis, Rheumatoid/genetics
- Arthritis, Rheumatoid/immunology
- Arthritis, Rheumatoid/metabolism
- Arthritis, Rheumatoid/pathology
- Biopsy
- Cell Lineage/genetics
- Humans
- Inflammation/genetics
- Inflammation/immunology
- Inflammation/metabolism
- Inflammation/pathology
- Joints/immunology
- Joints/metabolism
- Joints/pathology
- Lectins, C-Type/genetics
- Lectins, C-Type/immunology
- Macrophages/immunology
- Macrophages/metabolism
- Mannose Receptor
- Mannose-Binding Lectins/genetics
- Mannose-Binding Lectins/immunology
- Receptors, Cell Surface/genetics
- Receptors, Cell Surface/immunology
- Receptors, Immunologic/genetics
- Receptors, Immunologic/immunology
- Synovial Fluid/immunology
- Synovial Fluid/metabolism
- Synovial Membrane
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Affiliation(s)
- Stefano Alivernini
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), .
- Division of Rheumatology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy.
- Institute of Rheumatology, Università Cattolica del Sacro Cuore, Rome, Italy.
- Institute of Infection, Immunity, and Inflammation, University of Glasgow, Glasgow, UK.
| | - Lucy MacDonald
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE)
- Institute of Infection, Immunity, and Inflammation, University of Glasgow, Glasgow, UK
| | - Aziza Elmesmari
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE)
- Institute of Infection, Immunity, and Inflammation, University of Glasgow, Glasgow, UK
| | - Samuel Finlay
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE)
- Institute of Infection, Immunity, and Inflammation, University of Glasgow, Glasgow, UK
| | - Barbara Tolusso
- Division of Rheumatology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Maria Rita Gigante
- Division of Rheumatology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Luca Petricca
- Division of Rheumatology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Clara Di Mario
- Institute of Rheumatology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Laura Bui
- Division of Pathology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Simone Perniola
- Institute of Rheumatology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Moustafa Attar
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Marco Gessi
- Division of Pathology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Anna Laura Fedele
- Division of Rheumatology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Sabarinadh Chilaka
- Institute of Infection, Immunity, and Inflammation, University of Glasgow, Glasgow, UK
| | - Domenico Somma
- Institute of Infection, Immunity, and Inflammation, University of Glasgow, Glasgow, UK
| | - Stephen N Sansom
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE)
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Andrew Filer
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE)
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK
- NIHR Birmingham Biomedical Research Centre, University Hospitals Birmingham NHS Foundation Trust, University of Birmingham, Birmingham, UK
| | - Charles McSharry
- Institute of Infection, Immunity, and Inflammation, University of Glasgow, Glasgow, UK
| | - Neal L Millar
- Institute of Infection, Immunity, and Inflammation, University of Glasgow, Glasgow, UK
| | | | - Alessandra Nerviani
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Queen Mary University of London, London, UK
| | - Myles J Lewis
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Queen Mary University of London, London, UK
| | - Costantino Pitzalis
- Centre for Experimental Medicine and Rheumatology, William Harvey Research Institute, Queen Mary University of London, London, UK
| | - Andrew R Clark
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE)
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK
| | | | - Irina Udalova
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE)
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Christopher D Buckley
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE)
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK
- NIHR Birmingham Biomedical Research Centre, University Hospitals Birmingham NHS Foundation Trust, University of Birmingham, Birmingham, UK
| | - Elisa Gremese
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE)
- Division of Rheumatology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
- Institute of Rheumatology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Iain B McInnes
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE)
- Institute of Infection, Immunity, and Inflammation, University of Glasgow, Glasgow, UK
| | - Thomas D Otto
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), .
- Institute of Infection, Immunity, and Inflammation, University of Glasgow, Glasgow, UK.
| | - Mariola Kurowska-Stolarska
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), .
- Institute of Infection, Immunity, and Inflammation, University of Glasgow, Glasgow, UK.
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Tham A, McLean M, Atherton C, Millar NL. Treatment of periscapular tendinopathy with radiofrequency coblation: A case report. SAGE Open Med Case Rep 2020; 8:2050313X20930612. [PMID: 32695397 PMCID: PMC7350035 DOI: 10.1177/2050313x20930612] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 05/09/2020] [Indexed: 11/17/2022] Open
Abstract
Overuse injuries of the tendon – ‘tendinopathy’ – account for 30%–50% of all sporting injuries and a high proportion of orthopaedic referrals from primary care physicians. Tendinopathies often have a multifactorial aetiology and injury can be due to a combination of both acute and chronic trauma which contributes to loss of tissue integrity and eventual rupture. Our incomplete understanding of the mechanisms surrounding tendon pathophysiology continues to cause difficulties in treatments beyond loading regimes which can be unsuccessful in up to 30% of cases. We describe an uncommon case of tendinopathy affecting the periscapular muscle/tendon unit in a 35-year-old female with persistent pain around the inferior posterior pole of her right scapula. Magnetic resonance imaging findings confirmed oedema of the muscles around the inferior scapular margin in keeping with enthesopathy/tendinopathy and she was treated with radiofrequency coblation to the area. This case highlights radiofrequency ablation as a surgical option should non-operative treatments fail in the rare diagnosis of periscapular tendinopathy.
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Affiliation(s)
- Alexander Tham
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Michael McLean
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Caroline Atherton
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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31
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Akbar M, Garcia-Melchor E, Chilaka S, Little KJ, Sood S, Reilly JH, Liew FY, McInnes IB, Millar NL. Attenuation of Dupuytren's fibrosis via targeting of the STAT1 modulated IL-13Rα1 response. Sci Adv 2020; 6:eaaz8272. [PMID: 32695877 PMCID: PMC7351483 DOI: 10.1126/sciadv.aaz8272] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 05/28/2020] [Indexed: 05/02/2023]
Abstract
Fibrotic disorders represent common complex disease pathologies that are therapeutically challenging. Inflammation is associated with numerous fibrotic pathogeneses; however, its role in the multifaceted mechanisms of fibrosis remains unclear. IL-13 is implicated in aberrant responses involved in fibrotic disease, and we aimed to understand its role in the inflammatory processes of a common fibrotic disorder, Dupuytren's disease. We demonstrated T-cells produced IFN-g, which induced IL-13 secretion from mast cells and up-regulated IL-13Ra1 on fibroblasts, rendering them more reactive to IL-13. Consequently, diseased myofibroblasts demonstrated enhanced fibroproliferative effects upon IL-13 stimulation. We established IFN-g and IL-13 responses involved STAT dependent pathways, and STAT targeting (tofacitinib) could inhibit IL-13 production from mast cells, IL-13Ra1 up-regulation in fibroblasts and fibroproliferative effects of IL-13 on diseased myofibroblasts. Accordingly, utilizing Dupuytren's as an accessible human model of fibrosis, we propose targeting STAT pathways may offer previously unidentified therapeutic approaches in the management of fibrotic disease.
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Affiliation(s)
- Moeed Akbar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - Emma Garcia-Melchor
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - Sabarinadh Chilaka
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - Kevin J. Little
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, Govan Road, Glasgow, Scotland, UK
| | - Shatakshi Sood
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - James H. Reilly
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - Foo Y. Liew
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215006, JS, China
| | - Iain B. McInnes
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - Neal L. Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
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Garcia-Melchor E, Cafaro G, Sood S, Crowe LAN, McLean M, McInnes IB, Akbar M, Millar NL. O22 Assessing the role of tendon T cell interactions in the development of chronicity in PsA. Rheumatology (Oxford) 2020. [DOI: 10.1093/rheumatology/keaa110.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Mechanical stress or damage is a well-known inducer of inflammation in both psoriasis and psoriatic arthritis (PsA). The occurrence of microtrauma at enthesial sites, areas subjected to high mechanic stress, could explain the development of local inflammation (enthesitis) that further extends to the synovial tissue through what it is known synovio-entheseal complex. Current treatment strategies mainly target the immune compartment, however there is growing evidence for the role of the stroma in the development of chronic inflammation. Increasing attention has focused on the interaction between the stroma and immune system and its role in the initiation/development of tissue inflammatory chronicity. Our hypothesis is that stromal cells in the tendon or tenocytes, once activated, are able to recruit and activate T cells into the tendon, which in turn may have an effect on the stroma, altogether leading to chronicity.
Methods
We assessed the effect of damage on healthy tenocytes after stimulation with conditioned media from tendon explants or IL-1β by qPCR and ELISA. A transwell membrane system was used to test the impact of conditioned media from tenocytes on T cell migration. T cells and tenocytes were co-cultured with or without the presence of a transwell membrane to quantify T cell activation (CD69 by FACS and IFN-γ by ELISA). Changes in gene expression on tenocytes after co-culture with activated T cells were analysed by qPCR.
Results
In the presence of damage, tenocytes upregulated inflammatory cytokines (IL-1β, IL-6), chemokines (IL-8, CCL2, CCL5, CXCL10) and adhesion molecules (ICAM-1). Of interest, we observed an upregulation of CCL20, both at transcript and protein level. Conditioned media from tenocytes induced T cell migration, especially after stimulation. Co-culture of tenocytes and T cells resulted in contact dependant activation of T cells. These activated T cells also had an effect on tenocytes, further upregulating the production of inflammatory mediators.
Conclusion
These results support the role of the tendon stromal compartment in the recruitment and activation of T cells, creating a feedback loop that could be involved in the maintenance of the inflammatory process and the development of chronicity in the context of PsA. Moreover, the production of CCL20 by tenocytes after damage could explain the preferential recruitment of Th17 or gamma delta T cells into the tendon. We are further investigating the mechanisms that govern this relationship that could be targeted therapeutically in the future.
Disclosures
E. Garcia-Melchor None. G. Cafaro None. S. Sood None. L.A.N. Crowe None. M. McLean None. I.B. McInnes None. M. Akbar None. N.L. Millar None.
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Affiliation(s)
- Emma Garcia-Melchor
- University of Glasgow, Institute of Infection, Immunity and Inflammation, Glasgow, UNITED KINGDOM
| | - Giacomo Cafaro
- University of Glasgow, Institute of Infection, Immunity and Inflammation, Glasgow, UNITED KINGDOM
| | - Shatakshi Sood
- University of Glasgow, Institute of Infection, Immunity and Inflammation, Glasgow, UNITED KINGDOM
| | - Lindsay A. N Crowe
- University of Glasgow, Institute of Infection, Immunity and Inflammation, Glasgow, UNITED KINGDOM
| | - Michael McLean
- University of Glasgow, Institute of Infection, Immunity and Inflammation, Glasgow, UNITED KINGDOM
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UNITED KINGDOM
| | - Iain B McInnes
- University of Glasgow, Institute of Infection, Immunity and Inflammation, Glasgow, UNITED KINGDOM
| | - Moeed Akbar
- University of Glasgow, Institute of Infection, Immunity and Inflammation, Glasgow, UNITED KINGDOM
| | - Neal L Millar
- University of Glasgow, Institute of Infection, Immunity and Inflammation, Glasgow, UNITED KINGDOM
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UNITED KINGDOM
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Abraham AC, Shah SA, Golman M, Song L, Li X, Kurtaliaj I, Akbar M, Millar NL, Abu-Amer Y, Galatz LM, Thomopoulos S. Targeting the NF-κB signaling pathway in chronic tendon disease. Sci Transl Med 2020; 11:11/481/eaav4319. [PMID: 30814338 DOI: 10.1126/scitranslmed.aav4319] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 01/31/2019] [Indexed: 01/20/2023]
Abstract
Tendon disorders represent the most common musculoskeletal complaint for which patients seek medical attention; inflammation drives tendon degeneration before tearing and impairs healing after repair. Clinical evidence has implicated the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) pathway as a correlate of pain-free return to function after surgical repair. However, it is currently unknown whether this response is a reaction to or a driver of pathology. Therefore, we aimed to understand the clinically relevant involvement of the NF-κB pathway in tendinopathy, to determine its potential causative roles in tendon degeneration, and to test its potential as a therapeutic candidate. Transcriptional profiling of early rotator cuff tendinopathy identified increases in NF-κB signaling, including increased expression of the regulatory serine kinase subunit IKKβ, which plays an essential role in inflammation. Using cre-mediated overexpression of IKKβ in tendon fibroblasts, we observed degeneration of mouse rotator cuff tendons and the adjacent humeral head. These changes were associated with increases in proinflammatory cytokines and innate immune cells within the joint. Conversely, genetic deletion of IKKβ in tendon fibroblasts partially protected mice from chronic overuse-induced tendinopathy. Furthermore, conditional knockout of IKKβ improved outcomes after surgical repair, whereas overexpression impaired tendon healing. Accordingly, targeting of the IKKβ/NF-κB pathway in tendon stromal cells may offer previously unidentified therapeutic approaches in the management of human tendon disorders.
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Affiliation(s)
- Adam C Abraham
- Department of Orthopedic Surgery, Columbia University, 650 W 168th St, New York, NY 10032, USA
| | - Shivam A Shah
- Department of Biomedical Engineering, Washington University in St. Louis, 1 Brookings Drive, St. Louis, MO 63130, USA
| | - Mikhail Golman
- Department of Biomedical Engineering, Columbia University, 1210 Amsterdam Ave, New York, NY 10027, USA
| | - Lee Song
- Department of Orthopedic Surgery, Columbia University, 650 W 168th St, New York, NY 10032, USA
| | - Xiaoning Li
- Department of Orthopedic Surgery, Columbia University, 650 W 168th St, New York, NY 10032, USA
| | - Iden Kurtaliaj
- Department of Biomedical Engineering, Columbia University, 1210 Amsterdam Ave, New York, NY 10027, USA
| | - Moeed Akbar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 120 University Ave., Glasgow, Scotland G12 8TA, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 120 University Ave., Glasgow, Scotland G12 8TA, UK
| | - Yousef Abu-Amer
- Departments of Orthopedic Surgery and Cell Biology and Physiology, Washington University in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110, USA.,Shriners Hospital for Children, 4400 Clayton Ave, St. Louis, MO 63110, USA
| | - Leesa M Galatz
- Department of Orthopedic Surgery, Mount Sinai, 5 E 98th St., New York, NY 10029, USA
| | - Stavros Thomopoulos
- Department of Orthopedic Surgery, Columbia University, 650 W 168th St, New York, NY 10032, USA. .,Department of Biomedical Engineering, Columbia University, 1210 Amsterdam Ave, New York, NY 10027, USA
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Affiliation(s)
- Neal L Millar
- Institute of Infection, Immunity & Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - George A C Murrell
- Department of Orthopaedic Surgery, University of New South Wales-St George Campus, Sydney, New South Wales, Australia
| | - Paul Kirwan
- School of Physiotherapy, Royal College of Surgeons in Ireland, Dublin, Ireland.,Physiotherapy Department, Connolly Hospital Blanchardstown, Blanchardstown, Ireland
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Clifford C, Paul L, Syme G, Millar NL. Isometric versus isotonic exercise for greater trochanteric pain syndrome: a randomised controlled pilot study. BMJ Open Sport Exerc Med 2019; 5:e000558. [PMID: 31673402 PMCID: PMC6797310 DOI: 10.1136/bmjsem-2019-000558] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2019] [Indexed: 12/18/2022] Open
Abstract
Objectives Greater trochanteric pain syndrome (GTPS) is a common cause of lateral hip pain. Limited evidence exists for the effectiveness of exercise for GTPS. This study aimed to compare the effectiveness of isometric and isotonic exercise for individuals with GTPS. Methods This randomised controlled pilot trial recruited 30 participants with GTPS. Both programmes consisted of daily, progressive home exercise for 12 weeks with 8 individual physiotherapy sessions over the trial period. The primary outcome measure was the Victorian Institute of Sport Assessment-Gluteal (VISA-G) and secondary outcome measures included the Numeric Pain Rating Scale (0–10) and an 11-point Global Rating of Change Scale. Outcome measures were assessed at baseline, 4 and 12 weeks. Results Twenty-three participants completed the trial. After 12 weeks, mean VISA-G scores improved in both groups; 55–65 in the isometric group and 62–72 in the isotonic group. 55% of the isometric group and 58% of the isotonic group achieved a reduction in pain of at least 2 points (minimally clinically important difference (MCID)) on the Numeric Pain Rating Scale. 64% of the isometric group and 75% of the isotonic group had improved by at least 2 points (MCID) on the Global Rating of Change Scale. Conclusion Isometric and isotonic exercise programmes appear to be effective for individuals with GTPS and should be considered in the loading management of patients with this condition.
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Affiliation(s)
- Christopher Clifford
- Department of Physiotherapy, NHS Greater Glasgow and Clyde, Glasgow, UK.,Institute of Infection, Immunity and Inflammation, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Lorna Paul
- School of Health and Life Sciences, Glasgow Caledonian University, Glasgow, UK
| | - Grant Syme
- Department of Physiotherapy, NHS Fife, Kirkcaldy, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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36
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Cagle PJ, Werner B, Shukla DR, London DA, Parsons BO, Millar NL. Interobserver and intraobserver comparison of imaging glenoid morphology, glenoid version and humeral head subluxation. Shoulder Elbow 2019; 11:204-209. [PMID: 31210792 PMCID: PMC6555109 DOI: 10.1177/1758573218768507] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 02/04/2018] [Accepted: 02/07/2018] [Indexed: 11/15/2022]
Abstract
BACKGROUND Glenoid morphology, glenoid version and humeral head subluxation represent important parameters for the treating physician. The most common method of assessing glenoid morphology is the Walch classification which has only been validated with computed tomography (CT). METHODS CT images and magnetic resonance imaging (MRI) images of 25 patients were de-identified and randomized. Three reviewers assessed the images for each parameter twice. The Walch classification was assessed with a weighted kappa value. Glenoid version and humeral head subluxation were comparted with a reproducibility coefficient. RESULTS The Walch classification demonstrated almost perfect intraobserver agreement for MRI and CT images (k = 0.87). Weighted interobserver agreement values for the Walch classification were fair for CT and MRI (k = 0.34). The weighted reproducibility coefficient for glenoid version measured 9.13 (CI 7.16-12.60) degrees for CT and 13.44 (CI 10.54-18.55) degrees for MRI images. The weighted reproducibility coefficient for percentage of humeral head subluxation was 17.43% (CI 13.67-24.06) for CT and 18.49% (CI 14.5-25.52) for MRI images. DISCUSSION CT and MRI images demonstrated similar efficacy in classifying glenoid morphology, measuring glenoid version and measuring posterior humeral head subluxation. MRI can be used as an alternative to CT for measuring these parameters.
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Affiliation(s)
- Paul J Cagle
- Rhön-Klinikum AG, Bad Neustadt an der Saale, Germany,Paul J Cagle, Leni & Peter W. May Department of Orthopaedic Surgery, Icahn School of Medicine, Mount Sinai Medical Center, Mount Sinai West Hospital, 1000 Tenth Avenue, Suite 3A-35, New York, NY 10019, USA.
| | - Birgit Werner
- Rhön-Klinikum AG, Bad Neustadt an der Saale, Germany
| | - Dave R Shukla
- Newport Orthopaedic Institute (affiliated with the Mayo Clinic), Newport Beach, USA
| | - Daniel A London
- Icahn School of Medicine at Mount Sinai Hospital, New York, USA
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Challoumas D, Clifford C, Kirwan P, Millar NL. How does surgery compare to sham surgery or physiotherapy as a treatment for tendinopathy? A systematic review of randomised trials. BMJ Open Sport Exerc Med 2019; 5:e000528. [PMID: 31191975 PMCID: PMC6539146 DOI: 10.1136/bmjsem-2019-000528] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/26/2019] [Indexed: 12/21/2022] Open
Abstract
Purpose To assess the effectiveness of surgery on all tendinopathies by comparing it to no treatment, sham surgery and exercise-based therapies for both mid-term (12 months) and long-term (> 12 months) outcomes. Methods Our literature search included EMBASE, Medline, CINAHL and Scopus. A combined assessment of internal validity, external validity and precision of each eligible study yielded its overall study quality. Results were considered significant if they were based on strong (Level 1) or moderate (Level 2) evidence. Results 12 studies were eligible. Participants had the following types of tendinopathy: shoulder in seven studies, lateral elbow in three, patellar in one and Achilles in one. Two studies were of good, four of moderate and six of poor overall quality. Surgery was superior to no treatment or placebo, for the outcomes of pain, function, range of movement (ROM) and treatment success in the short and midterm. Surgery had similar effects to sham surgery on pain, function and range of motion in the midterm. Physiotherapy was as effective as surgery both in the midterm and long term for pain, function, ROM and tendon force, and pain, treatment success and quality of life, respectively. Conclusion We recommend that healthcare professionals who treat tendinopathy encourage patients to comply with loading exercise treatment for at least 12 months before the option of surgery is seriously entertained.
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Affiliation(s)
- Dimitrios Challoumas
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Christopher Clifford
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.,Department of Physiotherapy, NHS Greater Glasgow and Clyde, Glasgow, UK
| | - Paul Kirwan
- School of Physiotherapy, Royal College of Surgeons in Ireland, Dublin, Ireland.,Physiotherapy Department, Connolly Hospital Blanchardstown, Blanchardstown, Ireland
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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38
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Akbar M, McLean M, Garcia-Melchor E, Crowe LAN, McMillan P, Fazzi UG, Martin D, Arthur A, Reilly JH, McInnes IB, Millar NL. Fibroblast activation and inflammation in frozen shoulder. PLoS One 2019; 14:e0215301. [PMID: 31013287 PMCID: PMC6478286 DOI: 10.1371/journal.pone.0215301] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [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: 10/29/2018] [Accepted: 03/30/2019] [Indexed: 12/04/2022] Open
Abstract
Introduction Frozen shoulder is a common, fibro-proliferative disease characterised by the insidious onset of pain and progressively restricted range of shoulder movement. Despite the prevalence of this disease, there is limited understanding of the molecular mechanisms underpinning the pathogenesis of this debilitating disease. Previous studies have identified increased myofibroblast differentiation and proliferation, immune cell influx and dysregulated cytokine production. We hypothesised that subpopulations within the fibroblast compartment may take on an activated phenotype, thus initiating the inflammatory processes observed in frozen shoulder. Therefore, we sought to evaluate the presence and possible pathogenic role of known stromal activation proteins in Frozen shoulder, Methods Shoulder capsule samples were collected from 10 patients with idiopathic frozen shoulder and 10 patients undergoing shoulder stabilisation surgery. Fibroblast activation marker expression (CD248, CD146, VCAM and PDPN, FAP) was quantified using immunohistochemistry. Control and diseased fibroblasts were cultured for in vitro studies from capsule biopsies from instability and frozen shoulder surgeries, respectively. The inflammatory profile and effects of IL-1β upon diseased and control fibroblasts was assessed using ELISA, immunohistochemistry and qPCR. Results Immunohistochemistry demonstrated increased expression of fibroblast activation markers CD248, CD146, VCAM and PDPN in the frozen shoulder group compared with control (p < 0.05). Fibroblasts cultured from diseased capsule produced elevated levels of inflammatory protein (IL-6, IL-8 & CCL-20) in comparison to control fibroblasts. Exposing control fibroblasts to an inflammatory stimuli, (IL-1ß) significantly increased stromal activation marker transcript and protein expression (CD248, PDPN and VCAM). Conclusions These results show that fibroblasts have an activated phenotype in frozen shoulder and this is associated with inflammatory cytokine dysregulation. Furthermore, it supports the hypothesis that activated fibroblasts may be involved in regulating the inflammatory and fibrotic processes involved in this disease.
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Affiliation(s)
- Moeed Akbar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Michael McLean
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Emma Garcia-Melchor
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Lindsay AN Crowe
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Paul McMillan
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Umberto G. Fazzi
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital Glasgow, Scotland, United Kingdom
| | - David Martin
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital Glasgow, Scotland, United Kingdom
| | - Angus Arthur
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital Glasgow, Scotland, United Kingdom
| | - James H. Reilly
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Iain B. McInnes
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Neal L. Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, United Kingdom
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital Glasgow, Scotland, United Kingdom
- * E-mail:
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39
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Crowe LAN, McLean M, Kitson SM, Melchor EG, Patommel K, Cao HM, Reilly JH, Leach WJ, Rooney BP, Spencer SJ, Mullen M, Chambers M, Murrell GAC, McInnes IB, Akbar M, Millar NL. S100A8 & S100A9: Alarmin mediated inflammation in tendinopathy. Sci Rep 2019; 9:1463. [PMID: 30728384 PMCID: PMC6365574 DOI: 10.1038/s41598-018-37684-3] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [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: 06/12/2018] [Accepted: 12/12/2018] [Indexed: 11/11/2022] Open
Abstract
Alarmins S100A8 and S100A9 are endogenous molecules released in response to environmental triggers and cellular damage. They are constitutively expressed in immune cells such as monocytes and neutrophils and their expression is upregulated under inflammatory conditions. The molecular mechanisms that regulate inflammatory pathways in tendinopathy are largely unknown therefore identifying early immune effectors is essential to understanding the pathology. Based on our previous investigations highlighting tendinopathy as an alarmin mediated pathology we sought evidence of S100A8 & A9 expression in a human model of tendinopathy and thereafter, to explore mechanisms whereby S100 proteins may regulate release of inflammatory mediators and matrix synthesis in human tenocytes. Immunohistochemistry and quantitative RT-PCR showed S100A8 & A9 expression was significantly upregulated in tendinopathic tissue compared with control. Furthermore, treating primary human tenocytes with exogenous S100A8 & A9 significantly increased protein release of IL-6, IL-8, CCL2, CCL20 and CXCL10; however, no alterations in genes associated with matrix remodelling were observed at a transcript level. We propose S100A8 & A9 participate in early pathology by modulating the stromal microenvironment and influencing the inflammatory profile observed in tendinopathy. S100A8 and S100A9 may participate in a positive feedback mechanism involving enhanced leukocyte recruitment and release of pro-inflammatory cytokines from tenocytes that perpetuates the inflammatory response within the tendon in the early stages of disease.
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Affiliation(s)
- Lindsay A N Crowe
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - Michael McLean
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - Susan M Kitson
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - Emma Garcia Melchor
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - Katharina Patommel
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - Hai Man Cao
- Orthopaedic Research Institute, Department of Orthopaedic Surgery, St George Hospital Campus, University of New South Wales, New South Wales, Australia
| | - James H Reilly
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - William J Leach
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital Glasgow, Glasgow, Scotland, UK
| | - Brain P Rooney
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital Glasgow, Glasgow, Scotland, UK
| | - Simon J Spencer
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital Glasgow, Glasgow, Scotland, UK
| | - Michael Mullen
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital Glasgow, Glasgow, Scotland, UK
| | - Max Chambers
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital Glasgow, Glasgow, Scotland, UK
| | - George A C Murrell
- Orthopaedic Research Institute, Department of Orthopaedic Surgery, St George Hospital Campus, University of New South Wales, New South Wales, Australia
| | - Iain B McInnes
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - Moeed Akbar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK.
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McLean M, McCall K, Smith IDM, Blyth M, Kitson SM, Crowe LAN, Leach WJ, Rooney BP, Spencer SJ, Mullen M, Campton JL, McInnes IB, Akbar M, Millar NL. Tranexamic acid toxicity in human periarticular tissues. Bone Joint Res 2019; 8:11-18. [PMID: 30800295 PMCID: PMC6359888 DOI: 10.1302/2046-3758.81.bjr-2018-0181.r1] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Objectives Tranexamic acid (TXA) is an anti-fibrinolytic medication commonly used to reduce perioperative bleeding. Increasingly, topical administration as an intra-articular injection or perioperative wash is being administered during surgery. Adult soft tissues have a poor regenerative capacity and therefore damage to these tissues can be harmful to the patient. This study investigated the effects of TXA on human periarticular tissues and primary cell cultures using clinically relevant concentrations. Methods Tendon, synovium, and cartilage obtained from routine orthopaedic surgeries were used for ex vivo and in vitro studies using various concentrations of TXA. The in vitro effect of TXA on primary cultured tenocytes, fibroblast-like synoviocytes, and chondrocytes was investigated using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) cell viability assays, fluorescent microscopy, and multi-protein apoptotic arrays for cell death. Results There was a significant (p < 0.01) increase in cell death within all tissue explants treated with 100 mg/ml TXA. MTT assays revealed a significant (p < 0.05) decrease in cell viability in all tissues following treatment with 50 mg/ml or 100 mg/ml of TXA within four hours. There was a significant (p < 0.05) increase in cell apoptosis after one hour of exposure to TXA (100 mg/ml) in all tissues. Conclusion The current study demonstrates that TXA caused significant periarticular tissue toxicity ex vivo and in vitro at commonly used clinical concentrations. Cite this article: M. McLean, K. McCall, I. D. M. Smith, M. Blyth, S. M. Kitson, L. A. N. Crowe, W. J. Leach, B. P. Rooney, S. J. Spencer, M. Mullen, J. L. Campton, I. B. McInnes, M. Akbar, N. L. Millar. Tranexamic acid toxicity in human periarticular tissues. Bone Joint Res 2019;8:11–18. DOI: 10.1302/2046-3758.81.BJR-2018-0181.R1.
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Affiliation(s)
- M McLean
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - K McCall
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - I D M Smith
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - M Blyth
- Department of Orthopaedic Surgery, Glasgow Royal Infirmary, Glasgow, UK
| | - S M Kitson
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - L A N Crowe
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - W J Leach
- Department of Trauma & Orthopaedics, Glasgow Royal Infirmary, NHS Greater Glasgow and Clyde, Glasgow, UK
| | - B P Rooney
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, NHS Greater Glasgow and Clyde, Glasgow, UK
| | - S J Spencer
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, NHS Greater Glasgow and Clyde, Glasgow, UK
| | - M Mullen
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, NHS Greater Glasgow and Clyde, Glasgow, UK
| | - J L Campton
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, NHS Greater Glasgow and Clyde, Glasgow, UK
| | - I B McInnes
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - M Akbar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - N L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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McLean M, Hoban K, Gupta R, Gibson A, Brooksbank AJ, Fazzi UG, Arthur A, Martin D, Jenkins PJ, Millar NL. The epidemiology of acromioclavicular joint excision. J Orthop Surg (Hong Kong) 2018; 27:2309499018816521. [PMID: 30798777 PMCID: PMC6391558 DOI: 10.1177/2309499018816521] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND With the development of arthroscopic procedures such as subacromial decompression (ASAD) and rotator cuff repair (RCR), it is hypothesized that there may have been a similar rise in the performance of acromioclavicular joint excision (ACJE). The purpose of this study was to investigate the epidemiology of ACJE to examine incidence, surgical technique, age, gender of patients and associated procedures in an urban population. METHODS A prospectively collected surgical database was retrospectively examined to identify patients undergoing ACJE. Associated procedures such as ASAD or RCR were determined from these records. The demographic details (age and gender) were also recorded. RESULTS A total of 411 ACJEs were performed over the study period (n = 216 males, n = 195 female). The overall incidence increased from 9.3 per 100,000 in 2009, to a peak of 19.6 per 1,00,000 in 2013. In 349 patients, ACJE was undertaken as part of an arthroscopic procedure, of which 332 were ASAD+ACJE alone. The prevalence of arthroscopic ACJE in ASADs was 23.7% (349/1400). ACJE was performed as an open procedure in 62 (15%) cases. Those undergoing open ACJE were younger than those undergoing an arthroscopic procedure (mean difference 6.2 years, 95% CI 3.2-9.2, p < 0.001). CONCLUSIONS We demonstrate an increasing incidence of ACJE in the general population. The groups of patients most likely to undergo ACJE are women aged between 45 and 54 years old, men aged 55-64 years and the most socioeconomically deprived. The higher incidence of ACJE in the most deprived socioeconomic quintile may have public health implications. Level of Evidence: II; retrospective design: prognosis study.
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Affiliation(s)
- Michael McLean
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Katie Hoban
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UK
| | - Rohit Gupta
- Department of Orthopaedic Surgery, Glasgow Royal Infirmary, Glasgow, UK
| | - Anthony Gibson
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | | | - Umberto G. Fazzi
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UK
| | - Angus Arthur
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UK
| | - David Martin
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UK
| | - Paul J. Jenkins
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK,Department of Orthopaedic Surgery, Glasgow Royal Infirmary, Glasgow, UK
| | - Neal L. Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK,Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, UK,Neal L. Millar, Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, 120 University Avenue, Glasgow G12 8TA, UK.
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Challoumas D, Kirwan PD, Borysov D, Clifford C, McLean M, Millar NL. Topical glyceryl trinitrate for the treatment of tendinopathies: a systematic review. Br J Sports Med 2018; 53:251-262. [PMID: 30301735 PMCID: PMC6362607 DOI: 10.1136/bjsports-2018-099552] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/21/2018] [Indexed: 12/03/2022]
Abstract
Objective To produce a best evidence synthesis of the clinical effects of topical glyceryl trinitrate (GTN) in the treatment of tendinopathies. Design A systematic review of published randomised controlled trials (RCTs) of the use of GTN in patients with tendinopathy. Data sources MEDLINE, Embase, Scopus and CINAHL from database inception to January 2018. Methods We examined RCTs comparing the effects of topical GTN with either placebo or other treatments on tendinopathy. Overall quality of each eligible study was determined based on a combined assessment of internal validity, external validity and precision. The level of evidence for each assessed parameter was rated based on the system by van Tulder et al. Results A total of 10 eligible RCTs were identified including patients with tendinopathy of the rotator cuff (n=4), wrist extensors (n=3), Achilles (n=2) and patellar (n=1) tendons. For all tendinopathies, improvements in pain were significant when comparing GTN versus placebo in the short term (<8 weeks; poor evidence). Significant improvements in midterm outcomes for treatment with GTN versus placebo included the following: patient satisfaction (strong evidence); chances of being asymptomatic with activities of daily living (strong evidence); range of movement (moderate evidence); strength (moderate evidence); pain (at night and with activity; poor evidence) and local tenderness (poor evidence). Patients treated with topical GTN reported a higher incidence of headaches than those who received placebo (moderate evidence). Conclusions and relevance Treatment of tendinopathies with topical GTN for up to 6 months appears to be superior to placebo and may therefore be a useful adjunct to the treating healthcare professions.
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Affiliation(s)
- Dimitris Challoumas
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Paul D Kirwan
- School of Physiotherapy, Royal College of Surgeons in Ireland, Dublin, Ireland.,Physiotherapy Department, Connolly Hospital, Dublin, Ireland
| | - Dmytro Borysov
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | | | - Michael McLean
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
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Siebert S, Millar NL, McInnes IB. Why did IL-23p19 inhibition fail in AS: a tale of tissues, trials or translation? Ann Rheum Dis 2018; 78:1015-1018. [PMID: 30297330 PMCID: PMC6691857 DOI: 10.1136/annrheumdis-2018-213654] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 07/27/2018] [Accepted: 07/27/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Stefan Siebert
- Institute of Infection Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Neal L Millar
- Institute of Infection Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Iain B McInnes
- Institute of Infection Immunity and Inflammation, University of Glasgow, Glasgow, UK
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Cher JZB, Akbar M, Kitson S, Crowe LAN, Garcia-Melchor E, Hannah SC, McLean M, Fazzi UG, Kerr SC, Murrell GAC, Millar NL. Alarmins in Frozen Shoulder: A Molecular Association Between Inflammation and Pain. Am J Sports Med 2018; 46:671-678. [PMID: 29190116 DOI: 10.1177/0363546517741127] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The pathophysiological mechanisms behind proliferation of fibroblasts and deposition of dense collagen matrix in idiopathic frozen shoulder remain unclear. Alarmins (also known as danger signals) are endogenous molecules that are released into the extracellular milieu after infection or tissue injury and that signal cell and tissue damage. PURPOSE To investigate whether the presence of alarmins is higher in patients with idiopathic frozen shoulder than in control subjects. STUDY DESIGN Controlled laboratory study. METHODS Shoulder capsule samples were collected from 10 patients with idiopathic frozen shoulder and 10 patients with unstable shoulders (control). The samples were stained with hematoxylin and eosin (H&E) and analyzed by immunohistochemistry using antibodies against alarmin molecules including high-mobility group protein B1 (HMGB1), interleukin 33, S100A8, S100A9, and the peripheral nerve marker PGP9.5. Immunoreactivities were rated in a blinded fashion from "none" to "strong." Immunohistochemical distribution within the capsule was noted. Before surgery, patient-ranked pain frequency, severity, stiffness, and the range of passive shoulder motion were recorded and statistically analyzed. RESULTS Compared with control patients, patients with frozen shoulder had greater frequency and severity of self-reported pain ( P = .02) and more restricted range of motion in all planes ( P < .05). H&E-stained capsular tissue from frozen shoulder showed fibroblastic hypercellularity and increased subsynovial vascularity. Immunoreactivity of alarmins was significantly stronger in frozen shoulder capsules compared with control capsules ( P < .05). Furthermore, the expression of the alarmin molecule HMGB1 significantly correlated ( r > 0.9, P < .05) with the severity of patient-reported pain. CONCLUSION This study demonstrates a potential role for key molecular danger signals in frozen shoulder and suggests an association between the expression of danger molecules and the pain experienced by patients.
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Affiliation(s)
- Jonathon Z B Cher
- Orthopaedic Research Institute, Department of Orthopaedic Surgery, St George Hospital Campus, University of New South Wales, Sydney, Australia
| | - Moeed Akbar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Susan Kitson
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Lindsay A N Crowe
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Emma Garcia-Melchor
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Stephen C Hannah
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, Scotland, UK
| | - Michael McLean
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Umberto G Fazzi
- Department of Orthopaedic Surgery, Queen Elizabeth University Hospital, Glasgow, Scotland, UK
| | - Shauna C Kerr
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - George A C Murrell
- Orthopaedic Research Institute, Department of Orthopaedic Surgery, St George Hospital Campus, University of New South Wales, Sydney, Australia
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
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Akbar M, Gilchrist DS, Kitson SM, Nelis B, Crowe LAN, Garcia-Melchor E, Reilly JH, Kerr SC, Murrell GAC, McInnes IB, Millar NL. Targeting danger molecules in tendinopathy: the HMGB1/TLR4 axis. RMD Open 2017; 3:e000456. [PMID: 28879051 PMCID: PMC5574425 DOI: 10.1136/rmdopen-2017-000456] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 06/06/2017] [Accepted: 06/09/2017] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES To seek evidence of the danger molecule, high-mobility group protein B1 (HMGB1) expression in human tendinopathy and thereafter, to explore mechanisms where HMGB1 may regulate inflammatory mediators and matrix regulation in human tendinopathy. METHODS Torn supraspinatus tendon (established pathology) and matched intact subscapularis tendon (representing 'early pathology') biopsies were collected from patients undergoing arthroscopic shoulder surgery. Control samples of subscapularis tendon were collected from patients undergoing arthroscopic stabilisation surgery. Markers of inflammation and HMGB1 were quantified by reverse transcriptase PCR (RT-PCR) and immunohistochemistry. Human tendon-derived primary cells were derived from hamstring tendon tissue obtained during hamstring tendon anterior cruciate ligament reconstruction and used through passage 3. In vitro effects of recombinant HMGB1 on tenocyte matrix and inflammatory potential were measured using quantitative RT-PCR, ELISA and immunohistochemistry staining. RESULTS Tendinopathic tissues demonstrated significantly increased levels of the danger molecule HMGB1 compared with control tissues with early tendinopathy tissue showing the greatest expression. The addition of recombinant human HMGB1 to tenocytes led to significant increase in expression of a number of inflammatory mediators, including interleukin 1 beta (IL-1β), IL-6, IL-33, CCL2 and CXCL12, in vitro. Further analysis demonstrated rhHMGB1 treatment resulted in increased expression of genes involved in matrix remodelling. Significant increases were observed in Col3, Tenascin-C and Decorin. Moreover, blocking HMGB1 signalling via toll-like receptor 4 (TLR4) silencing reversed these key inflammatory and matrix changes. CONCLUSION HMGB1 is present in human tendinopathy and can regulate inflammatory cytokines and matrix changes. We propose HMGB1 as a mediator driving the inflammatory/matrix crosstalk and manipulation of the HMGB1/TLR4 axis may offer novel therapeutic approaches targeting inflammatory mechanisms in the management of human tendon disorders.
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Affiliation(s)
- Moeed Akbar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Derek S Gilchrist
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Susan M Kitson
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Briana Nelis
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Lindsay A N Crowe
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Emma Garcia-Melchor
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - James H Reilly
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Shauna C Kerr
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - George A C Murrell
- Department of Orthopaedic Surgery, Orthopaedic Research Institute, St George Hospital Campus, University of New South Wales, Sydney, New South Wales, Australia
| | - Iain B McInnes
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, Scotland, UK
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Watts AE, Millar NL, Platt J, Kitson SM, Akbar M, Rech R, Griffin J, Pool R, Hughes T, McInnes IB, Gilchrist DS. MicroRNA29a Treatment Improves Early Tendon Injury. Mol Ther 2017; 25:2415-2426. [PMID: 28822690 DOI: 10.1016/j.ymthe.2017.07.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2017] [Revised: 07/25/2017] [Accepted: 07/25/2017] [Indexed: 01/21/2023] Open
Abstract
Tendon injuries (tendinopathies) are common in human and equine athletes and characterized by dysregulated collagen matrix, resulting in tendon damage. We have previously demonstrated a functional role for microRNA29a (miR29a) as a post-transcriptional regulator of collagen 3 expression in murine and human tendon injury. Given the translational potential, we designed a randomized, blinded trial to evaluate the potential of a miR29a replacement therapy as a therapeutic option to treat tendinopathy in an equine model that closely mimics human disease. Tendon injury was induced in the superficial digital flexor tendon (SDFT) of 17 horses. Tendon lesions were treated 1 week later with an intralesional injection of miR29a or placebo. miR29a treatment reduced collagen 3 transcript levels at week 2, with no significant changes in collagen 1. The relative lesion cross-sectional area was significantly lower in miR29a tendons compared to control tendons. Histology scores were significantly better for miR29a-treated tendons compared to control tendons. These data support the mechanism of microRNA-mediated modulation of early pathophysiologic events that facilitate tissue remodeling in the tendon after injury and provides a strong proof of principle that a locally delivered miR29a therapy improves early tendon healing.
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Affiliation(s)
- Ashlee E Watts
- The Comparative Orthopedics and Regenerative Medicine Laboratory, Texas A&M University, College Station, TX 77843, USA
| | - Neal L Millar
- Institute of Infection, Immunity, and Inflammation, College of Medicine, Veterinary, and Life Sciences, University of Glasgow, Glasgow G12 8TA, UK.
| | - Josh Platt
- The Comparative Orthopedics and Regenerative Medicine Laboratory, Texas A&M University, College Station, TX 77843, USA
| | - Susan M Kitson
- Institute of Infection, Immunity, and Inflammation, College of Medicine, Veterinary, and Life Sciences, University of Glasgow, Glasgow G12 8TA, UK
| | - Moeed Akbar
- Institute of Infection, Immunity, and Inflammation, College of Medicine, Veterinary, and Life Sciences, University of Glasgow, Glasgow G12 8TA, UK
| | - Raquel Rech
- The Comparative Orthopedics and Regenerative Medicine Laboratory, Texas A&M University, College Station, TX 77843, USA
| | - Jay Griffin
- The Comparative Orthopedics and Regenerative Medicine Laboratory, Texas A&M University, College Station, TX 77843, USA
| | - Roy Pool
- The Comparative Orthopedics and Regenerative Medicine Laboratory, Texas A&M University, College Station, TX 77843, USA
| | - Tom Hughes
- Liphook Equine Hospital, Forest Mere, Liphook GU30 7JG, UK
| | - Iain B McInnes
- Institute of Infection, Immunity, and Inflammation, College of Medicine, Veterinary, and Life Sciences, University of Glasgow, Glasgow G12 8TA, UK
| | - Derek S Gilchrist
- Institute of Infection, Immunity, and Inflammation, College of Medicine, Veterinary, and Life Sciences, University of Glasgow, Glasgow G12 8TA, UK.
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Abstract
Tendinopathy is a common clinical problem and has a significant disease burden attached, not only in terms of health care costs, but also for patients directly in terms of time off work and impact upon quality of life. Controversy surrounds the pathogenesis of tendinopathy, however the recent systematic analysis of the evidence has demonstrated that many of the claims of an absence of inflammation in tendinopathy were more based around belief than robust scientific data. This review is a summary of the emerging research in this topical area, with a particular focus on the role of neuronal regulation and inflammation in tendinopathy.
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Affiliation(s)
- Benjamin J F Dean
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), University of Oxford, Botnar Research Centre, Windmill Road, Oxford, OX3 7LD, UK.
| | - Stephanie G Dakin
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), University of Oxford, Botnar Research Centre, Windmill Road, Oxford, OX3 7LD, UK.
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences University of Glasgow, Glasgow, Scotland, UK.
| | - Andrew J Carr
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), University of Oxford, Botnar Research Centre, Windmill Road, Oxford, OX3 7LD, UK.
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McLean M, Whyte T, Millar NL. Outerbridge grade IV cartilage lesions in the hip identified at arthroscopy. Ann Transl Med 2017; 5:226. [DOI: 10.21037/atm.2017.03.58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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49
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Kurowska-Stolarska M, Hasoo MK, Welsh DJ, Stewart L, McIntyre D, Morton BE, Johnstone S, Miller AM, Asquith DL, Millar NL, Millar AB, Feghali-Bostwick CA, Hirani N, Crick PJ, Wang Y, Griffiths WJ, McInnes IB, McSharry C. The role of microRNA-155/liver X receptor pathway in experimental and idiopathic pulmonary fibrosis. J Allergy Clin Immunol 2016; 139:1946-1956. [PMID: 27746237 PMCID: PMC5457127 DOI: 10.1016/j.jaci.2016.09.021] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 08/10/2016] [Accepted: 09/06/2016] [Indexed: 01/13/2023]
Abstract
Background Idiopathic pulmonary fibrosis (IPF) is progressive and rapidly fatal. Improved understanding of pathogenesis is required to prosper novel therapeutics. Epigenetic changes contribute to IPF; therefore, microRNAs may reveal novel pathogenic pathways. Objectives We sought to determine the regulatory role of microRNA (miR)-155 in the profibrotic function of murine lung macrophages and fibroblasts, IPF lung fibroblasts, and its contribution to experimental pulmonary fibrosis. Methods Bleomycin-induced lung fibrosis in wild-type and miR-155−/− mice was analyzed by histology, collagen, and profibrotic gene expression. Mechanisms were identified by in silico and molecular approaches and validated in mouse lung fibroblasts and macrophages, and in IPF lung fibroblasts, using loss-and-gain of function assays, and in vivo using specific inhibitors. Results miR-155−/− mice developed exacerbated lung fibrosis, increased collagen deposition, collagen 1 and 3 mRNA expression, TGF-β production, and activation of alternatively activated macrophages, contributed by deregulation of the miR-155 target gene the liver X receptor (LXR)α in lung fibroblasts and macrophages. Inhibition of LXRα in experimental lung fibrosis and in IPF lung fibroblasts reduced the exacerbated fibrotic response. Similarly, enforced expression of miR-155 reduced the profibrotic phenotype of IPF and miR-155−/− fibroblasts. Conclusions We describe herein a molecular pathway comprising miR-155 and its epigenetic LXRα target that when deregulated enables pathogenic pulmonary fibrosis. Manipulation of the miR-155/LXR pathway may have therapeutic potential for IPF.
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Affiliation(s)
| | - Manhl K Hasoo
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - David J Welsh
- Scottish Pulmonary Vascular Unit, University of Glasgow, Glasgow, United Kingdom
| | - Lynn Stewart
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Donna McIntyre
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Brian E Morton
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Steven Johnstone
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Ashley M Miller
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Darren L Asquith
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Neal L Millar
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Ann B Millar
- Academic Respiratory Unit, Learning and Research, University of Bristol, Bristol, United Kingdom
| | | | - Nikhil Hirani
- University of Edinburgh/MRC Centre for Inflammation Research, the Queen's Medical Research Institute, Edinburgh, United Kingdom
| | - Peter J Crick
- College of Medicine, Swansea University, Swansea, United Kingdom
| | - Yuqin Wang
- College of Medicine, Swansea University, Swansea, United Kingdom
| | | | - Iain B McInnes
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom
| | - Charles McSharry
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom; Greater Glasgow and Clyde Clinical Research and Development, Yorkhill Hospital, Glasgow, United Kingdom.
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Millar NL, Dean BJ, Dakin SG. Inflammation and the continuum model: time to acknowledge the molecular era of tendinopathy. Br J Sports Med 2016; 50:1486. [PMID: 27259752 DOI: 10.1136/bjsports-2016-096419] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2016] [Indexed: 11/03/2022]
Affiliation(s)
- Neal L Millar
- Institute of Infection, Immunity and Inflammation, College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Benjamin J Dean
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Botnar Research Centre, University of Oxford, Oxford, UK
| | - Stephanie G Dakin
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Botnar Research Centre, University of Oxford, Oxford, UK
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