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Saxer F, Demanse D, Brett A, Laurent D, Mindeholm L, Conaghan P, Schieker M. Prognostic value of B-score for predicting joint replacement in the context of osteoarthritis phenotypes: Data from the osteoarthritis initiative. OSTEOARTHRITIS AND CARTILAGE OPEN 2024; 6:100458. [PMID: 38495348 PMCID: PMC10944111 DOI: 10.1016/j.ocarto.2024.100458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 01/27/2024] [Accepted: 02/29/2024] [Indexed: 03/19/2024] Open
Abstract
Objective Developing new therapies for knee osteoarthritis (KOA) requires improved prediction of disease progression. This study evaluated the prognostic value of clinical clusters and machine-learning derived quantitative 3D bone shape B-score for predicting total and partial knee replacement (KR). Design This retrospective study used longitudinal data from the Osteoarthritis Initiative. A previous study used patients' clinical profiles to delineate phenotypic clusters. For these clusters, the distribution of B-scores was assessed (employing Tukey's method). The value of both cluster allocation and B-score for KR-prediction was then evaluated using multivariable Cox regression models and Kaplan-Meier curves for time-to-event analyses. The impact of using B-score vs. cluster was evaluated using a likelihood ratio test for the multivariable Cox model; global performances were assessed by concordance statistics (Harrell's C-index) and time dependent receiver operating characteristic (ROC) curves. Results B-score differed significantly for the individual clinical clusters (p < 0.001). Overall, 9.4% of participants had a KR over 9 years, with a shorter time to event in clusters with high B-score at baseline. Those clusters were characterized clinically by a high rate of comorbidities and potential signs of inflammation. Both phenotype and B-score independently predicted KR, with better prediction if combined (P < 0.001). B-score added predictive value in groups with less pain and radiographic severity but limited physical activity. Conclusions B-scores correlated with phenotypes based on clinical patient profiles. B-score and phenotype independently predicted KR surgery, with higher predictive value if combined. This can be used for patient stratification in drug development and potentially risk prediction in clinical practice.
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Affiliation(s)
- F. Saxer
- Novartis Biomedical Research, Novartis Campus, 4002, Basel, Switzerland
- Medical Faculty, University of Basel, 4002, Basel, Switzerland
| | - D. Demanse
- Novartis Pharma AG, 4002, Basel, Switzerland
| | - A. Brett
- Imorphics, Worthington House, Towers Business Park, Wilmslow Road, Manchester, M20 2HJ, UK
| | - D. Laurent
- Novartis Biomedical Research, Biomarker Development, 4002, Basel, Switzerland
| | - L. Mindeholm
- Novartis Biomedical Research, Novartis Campus, 4002, Basel, Switzerland
| | - P.G. Conaghan
- Leeds Institute of Rheumatic & Musculoskeletal Medicine, University of Leeds and NIHR Leeds Biomedical Research Centre, UK
| | - M. Schieker
- Novartis Biomedical Research, Novartis Campus, 4002, Basel, Switzerland
- Medical Faculty, Ludwig-Maximilians-University, Munich, 80336, Germany
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Guermazi A, Hayashi D, Jarraya M, Roemer FW. The role of imaging in disentangling the enigma of osteoarthritis. Skeletal Radiol 2023; 52:2005-2006. [PMID: 37712981 DOI: 10.1007/s00256-023-04454-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Affiliation(s)
- Ali Guermazi
- Department of Radiology, Chobanian & Avedisian Boston University School of Medicine, Boston, MA, USA.
- Department of Radiology, Boston VA Healthcare System, West Roxbury, Boston, MA, USA.
| | - Daichi Hayashi
- Department of Radiology, Tufts Medical Center, Tufts University School of Medicine, Boston, MA, USA
- Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, USA
| | - Mohamed Jarraya
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Frank W Roemer
- Department of Radiology, Chobanian & Avedisian Boston University School of Medicine, Boston, MA, USA
- Department of Radiology, Universitätsklinikum Erlangen & Friedrich Alexander Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
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Radojčić MR, Perera RS, Hart DJ, Spector TD, Arden NK. Prevalence, incidence, and re-occurrence risk of musculoskeletal pain in older adults in the United Kingdom: a population-based study. FRONTIERS IN PAIN RESEARCH 2023; 4:1197810. [PMID: 37720912 PMCID: PMC10502338 DOI: 10.3389/fpain.2023.1197810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 08/07/2023] [Indexed: 09/19/2023] Open
Abstract
Background Throughout the literature, pain burden has been assessed by asking different questions, often cross-sectionally, different populations of interest. We know little about pain re-occurrence and how to translate knowledge between pain questions within the population of interest. We aimed to estimate the burden of musculoskeletal pain by estimating prevalence, incidence rates, and re-occurrence risk of back, hand, hip, knee, and foot pain using different questions from UK population-based samples and predict the number of affected individuals in the UK in 2030. Methods We used two UK population-representative studies, with two eight-year-apart follow-ups and two pain questions assessing recent pain episodes and often troubled pain when walking. We estimated prevalence, 8-year incidence rates, and 8-year pain re-occurrence risk for women and men aged 50 years and older and the relation between the two pain questions. Results Among UK individuals older than 50 years, the prevalence of musculoskeletal pain episode was 20%-50%, and the incidence was 20-40/1,000 person-years, while the prevalence of pain when walking was 10%-25%, and the incidence was 6-12/1,000 person-years. The most prevalent musculoskeletal pain types were back and knee pain; of five women experiencing back or knee pain episodes, three are expected to be often troubled by pain. Hip and foot pain had similar estimates in both questions. Hand pain peaked in women aged 50-65 years. Women had higher prevalence and incidence rates, but men had higher 8-year re-occurrence risk of all types of musculoskeletal pain. Reporting a pain episode was associated with two times higher risk, but often troubled by pain when walking was associated with four to seven times times higher risk of the same pain in 8 years. Women and men with a body mass index (BMI) of ≥27 kg/m2 were twice as likely to experience musculoskeletal pain than those with BMI<27 kg/m2. In 2030, we expect 2-7 million people older than 50 years in the United Kingdom to seek site-specific musculoskeletal pain-focused healthcare. Conclusions In individuals older than 50 years, the experience of musculoskeletal pain at least doubles the chance of experiencing it again. Women report musculoskeletal pain more often, but men report more persistent pain. Musculoskeletal pain presents a significant burden to public health.
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Affiliation(s)
- Maja R. Radojčić
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
- Division of Psychology and Mental Health, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom
| | - Romain S. Perera
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
- Department of Allied Health Sciences, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
- Sports and Exercise Medicine Unit, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
| | - Deborah J. Hart
- Department of Twin Research and Genetic Epidemiology, King’s College London, London, United Kingdom
| | - Tim D. Spector
- Department of Twin Research and Genetic Epidemiology, King’s College London, London, United Kingdom
| | - Nigel K. Arden
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, United Kingdom
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Herbst EC, Evans LAE, Felder AA, Javaheri B, Pitsillides AA. 3D profiling of mouse epiphyses across ages reveals new potential imaging biomarkers of early spontaneous osteoarthritis. J Anat 2023; 242:1037-1050. [PMID: 36772893 PMCID: PMC10184544 DOI: 10.1111/joa.13834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 10/24/2022] [Accepted: 01/16/2023] [Indexed: 02/12/2023] Open
Abstract
Worldwide research groups and funding bodies have highlighted the need for imaging biomarkers to predict osteoarthritis (OA) progression and treatment effectiveness. Changes in trabecular architecture, which can be detected with non-destructive high-resolution CT imaging, may reveal OA progression before apparent articular surface damage. Here, we analysed the tibial epiphyses of STR/Ort (OA-prone) and CBA (healthy, parental control) mice at different ages to characterise the effects of mouse age and strain on multiple bony parameters. We isolated epiphyseal components using a semi-automated method, and measured the total epiphyseal volume; cortical bone, trabecular bone and marrow space volumes; mean trabecular and cortical bone thicknesses; trabecular volume relative to cortical volume; trabecular volume relative to epiphyseal interior (trabecular BV/TV); and the trabecular degree of anisotropy. Using two-way ANOVA (significance level ≤0.05), we confirmed that all of these parameters change significantly with age, and that the two strains were significantly different in cortical and trabecular bone volumes, and trabecular degree of anisotropy. STR/Ort mice had higher cortical and trabecular volumes and a lower degree of anisotropy. As the two mouse strains reflect markedly divergent OA predispositions, these parameters have potential as bioimaging markers to monitor OA susceptibility and progression. Additionally, significant age/strain interaction effects were identified for total epiphyseal volume, marrow space volume and trabecular BV/TV. These interactions confirm that the two mouse strains have different epiphyseal growth patterns throughout life, some of which emerge prior to OA onset. Our findings not only propose valuable imaging biomarkers of OA, but also provide insight into ageing 3D epiphyseal architecture bone profiles and skeletal biology underlying the onset and development of age-related OA in STR/Ort mice.
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Affiliation(s)
- Eva C. Herbst
- Palaeontological Institute & MuseumUniversity of ZurichZurichSwitzerland
- Skeletal Biology Group, Comparative Biomedical SciencesRoyal Veterinary CollegeLondonUK
| | - Lucinda A. E. Evans
- Skeletal Biology Group, Comparative Biomedical SciencesRoyal Veterinary CollegeLondonUK
| | - Alessandro A. Felder
- Skeletal Biology Group, Comparative Biomedical SciencesRoyal Veterinary CollegeLondonUK
- Research Software Development Group, Advanced Research ComputingUniversity College LondonLondonUK
| | - Behzad Javaheri
- Skeletal Biology Group, Comparative Biomedical SciencesRoyal Veterinary CollegeLondonUK
| | - Andrew A. Pitsillides
- Skeletal Biology Group, Comparative Biomedical SciencesRoyal Veterinary CollegeLondonUK
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Segal NA, Nevitt MC, Morales Aquino M, McFadden E, Ho M, Duryea J, Tolstykh I, Cheng H, He J, Lynch JA, Felson DT, Anderson DD. Improved responsiveness to change in joint space width over 24-month follow-up: comparison of 3D JSW on weight-bearing CT vs 2D JSW on radiographs in the MOST study. Osteoarthritis Cartilage 2023; 31:406-413. [PMID: 36526151 PMCID: PMC9974913 DOI: 10.1016/j.joca.2022.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 11/13/2022] [Accepted: 12/06/2022] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Radiographic joint space width (JSW) has been a standard for measuring knee osteoarthritis (OA) structural change. Limitations in the responsiveness of this approach might be overcome by instead measuring 3D JSW on weight-bearing CT (WBCT). This study compared the responsiveness of 3D JSW measurements using WBCT with the responsiveness of radiographic 2D JSW. DESIGN Standing, fixed-flexion knee radiographs (XR) and WBCT were acquired ancillary to the 144- and 168-month Multicenter Osteoarthritis Study visits. Tibiofemoral JSW was measured on both XR and WBCT. Responsiveness to change was defined by the standardized response mean (SRM) for change in JSW (1) at predetermined mediolateral locations (JSWx) on both modalities and (2) in the following subregions measured on WBCT images: central medial and lateral femur (CMF/CLF) and tibia (CMT/CLT), and anterior and posterior tibia (AMT/ALT, PMT/MLT). RESULTS Baseline and 24-month follow-up JSWx measurements were completed for 265 participants (58.1% women). Responsiveness of 3D JSWx for medial tibiofemoral compartment on coronal WBCT (SRM range: -0.18, -0.24) exceeded that for 2D JSWx (-0.10, -0.16). Responsiveness of 3D JSW subregional mean (-0.06, -0.36) and maximal (-1.14, -1.75) CMF and CMT and maximal CLF/CLT 3D JSW changes were statistically significantly greater in comparison with respective medial and lateral 2D JSWx (P ≤ 0.002). CONCLUSIONS Subregional 3D JSW on WBCT is substantially more responsive to 24-month changes in tibiofemoral joint structure compared to radiographic measurements. Use of subregional 3D JSW on WBCT could enable improved detection of OA structural progression over a 24-month duration in comparison with measurements made on XR.
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Affiliation(s)
- N A Segal
- University of Kansas Medical Center, Kansas City, KS, USA; The University of Iowa, Iowa City, IA, USA.
| | - M C Nevitt
- University of California-San Francisco, San Francisco, CA, USA
| | | | - E McFadden
- The University of Iowa, Iowa City, IA, USA
| | - M Ho
- The University of Iowa, Iowa City, IA, USA
| | - J Duryea
- Harvard University, Cambridge, MA, USA
| | - I Tolstykh
- University of California-San Francisco, San Francisco, CA, USA
| | - H Cheng
- University of Kansas Medical Center, Kansas City, KS, USA
| | - J He
- University of Kansas Medical Center, Kansas City, KS, USA
| | - J A Lynch
- University of California-San Francisco, San Francisco, CA, USA
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Brett A, Bowes MA, Conaghan PG. Comparison of 3D quantitative osteoarthritis imaging biomarkers from paired CT and MR images: data from the IMI-APPROACH study. BMC Musculoskelet Disord 2023; 24:76. [PMID: 36710346 PMCID: PMC9885640 DOI: 10.1186/s12891-023-06187-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 01/23/2023] [Indexed: 01/31/2023] Open
Abstract
INTRODUCTION MRI bone surface area and femoral bone shape (B-score) measures have been employed as quantitative endpoints in DMOAD clinical trials. Computerized Tomography (CT) imaging is more commonly used for 3D visualization of bony anatomy due to its high bone-soft tissue contrast. We aimed to compare CT and MRI assessments of 3D imaging biomarkers. METHODS We used baseline and 24-month image data from the IMI-APPROACH 2-year prospective cohort study. Femur and tibia were automatically segmented using active appearance models, a machine-learning method, to measure 3D bone shape, area and 3D joint space width (3DJSW). Linear regression was used to test for correlation between measures. Limits of agreement and bias were tested using Bland-Altman analysis. RESULTS CT-MR pairs of the same knee were available from 434 participants (78% female). B-scores from CT and MR were strongly correlated (CCC = 0.967) with minimal bias of 0.1 (SDD = 0.227). Area measures were also correlated but showed a consistent bias (MR smaller). 3DJSW showed different biases (MR larger) in both lateral and medial compartments. DISCUSSION The strong correlation and small B-score bias suggests that B-score may be measured reliably using either modality. It is likely that the bone surface identified using MR and CT will be at slightly different positions within the bone/cartilage boundary. The negative bone area bias suggests the MR bone boundary is inside the CT boundary producing smaller areas for MR, consistent with the positive 3DJSW bias. The lateral-medial 3DJSW difference is possibly due to a difference in knee pose during acquisition (extended for CT, flexed for MR). TRIAL REGISTRATION NCT03883568.
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Affiliation(s)
- Alan Brett
- Imorphics, Worthington House, Towers Business Park, Wilmslow Road, Manchester, M20 2HJ UK
| | - Michael A. Bowes
- Imorphics, Worthington House, Towers Business Park, Wilmslow Road, Manchester, M20 2HJ UK
| | - Philip G. Conaghan
- grid.454370.10000 0004 0439 7412Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds & NIHR Leeds Biomedical Research Centre, Leeds, UK
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Effects of Immobilization and Swimming on the Progression of Osteoarthritis in Mice. Int J Mol Sci 2022; 24:ijms24010535. [PMID: 36613978 PMCID: PMC9820595 DOI: 10.3390/ijms24010535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 12/16/2022] [Accepted: 12/19/2022] [Indexed: 12/30/2022] Open
Abstract
Osteoarthritis (OA) is a chronic joint disease characterized by the degeneration of articular cartilage and thickening and sclerosis of the subchondral bone. Mechanical factors play significant roles in the development and progression of OA, but it is still controversial whether exercise or rest is a more effective treatment for OA patients. In this study, we compared the effects of swimming and immobilization at different stages of OA in mice. Four weeks (the middle stage of OA) or eight weeks (the late stage of OA) after DMM (destabilization of the medial meniscus) surgery, the mice were subjected to four-week immobilization or swimming. Ink blot analysis and a beam walking test were performed to measure the gait and balance ability. Histological analysis was performed to determine the trabecular bone area, the thickness of subchondral bone, the thickness of the cartilage, the OARSI score, and the expression of MMP13 (matrix metalloproteinases) and IL-6 (interleukin). The results showed that at the middle stage of OA, both immobilization and swimming slowed down the progression of OA. Immobilization relieved OA to a certain extent by decreasing the production of regulatory factors to attenuate the degeneration of cartilage, which partly relieved the effects of DMM on gait, mainly in the hindlimb. Swimming mainly attenuated the thickening and rescued the area of subchondral bone.
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Evans LAE, Pitsillides AA. Structural clues to articular calcified cartilage function: A descriptive review of this crucial interface tissue. J Anat 2022; 241:875-895. [PMID: 35866709 PMCID: PMC9482704 DOI: 10.1111/joa.13728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 06/26/2022] [Accepted: 06/30/2022] [Indexed: 11/26/2022] Open
Abstract
Articular calcified cartilage (ACC) has been dismissed, by some, as a remnant of endochondral ossification without functional relevance to joint articulation or weight-bearing. Recent research indicates that morphologic and metabolic ACC features may be important, reflecting knee joint osteoarthritis (OA) predisposition. ACC is less investigated than neighbouring joint tissues, with its component chondrocytes and mineralised matrix often being either ignored or integrated into analyses of hyaline articular cartilage and subchondral bone tissue respectively. Anatomical variation in ACC is recognised between species, individuals and age groups, but the selective pressures underlying this variation are unknown. Consequently, optimal ACC biomechanical features are also unknown as are any potential locomotory roles. This review collates descriptions of ACC anatomy and biology in health and disease, with a view to revealing its structure/function relationship and highlighting potential future research avenues. Mouse models of healthy and OA joint ageing have shown disparities in ACC load-induced deformations at the knee joint. This raises the hypothesis that ACC response to locomotor forces over time may influence, or even underlie, the bony and hyaline cartilage symptoms characteristic of OA. To effectively investigate the ACC, greater resolution of joint imaging and merging of hierarchical scale data will be required. An appreciation of OA as a 'whole joint disease' is expanding, as is the possibility that the ACC may be a key player in healthy ageing and in the transition to OA joint pathology.
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Affiliation(s)
- Lucinda A. E. Evans
- Department of Comparative Biomedical SciencesRoyal Veterinary College, University of LondonLondonUK
| | - Andrew A. Pitsillides
- Department of Comparative Biomedical SciencesRoyal Veterinary College, University of LondonLondonUK
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Alexander LC, Huebner JL, Cicconetti G, Jordan JM, Renner JB, Doherty M, Wilson AG, Hochberg MC, Loeser R, Kraus VB. Tibiofemoral knee osteoarthritis progresses symmetrically by knee compartment in the GOGO cohort. OSTEOARTHRITIS AND CARTILAGE OPEN 2022; 4. [PMID: 36081777 PMCID: PMC9451142 DOI: 10.1016/j.ocarto.2022.100288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Objective: To evaluate the degree of symmetry of knee osteoarthritis (OA) structural severity and progression of participants with a mean follow-up time of 3.8 years. Design: Participants from the Genetics of Generalized Osteoarthritis (GOGO) study (n = 705) were selected on the basis of radiographic evidence of OA in at least 1 knee, availability of radiographs at baseline and follow-up, and no history of prior knee injury or surgery. Incidence and progression of osteoarthritis were determined by radiographic Kellgren-Lawrence (KL) grade; compartmental OA progression was determined by change in joint space width of lateral and medial tibiofemoral compartments. Total OA progression was the sum of change in KL grade of both knees. Results: Compared with left knees, right knees had more severe KL grades at baseline (p = 0.0002) and follow-up (p = 0.0004), McNemar′s χ2 = 34.16 and 26.08, respectively; however, both knees progressed similarly (p = 0.121, McNemar′s χ2 = 10.09). Compartmental changes were symmetric across knees: medial r = 0.287, p = 0.0002; lateral r = 0.593, p = 0.0002. Change in joint space width in the medial compartment was negatively correlated with change in the lateral compartment of the same knee (left knees: r = −0.293, p = 0.021; right knees: r = −0.195, p = 0.0002). Conclusions: Although right knees tended to have more severe OA at both baseline and follow-up, radiographic progression did not differ by knee and compartmental progression correlated across knees. Given this trend in generalized OA, the risk of progression for both knees should be considered, even if only one knee has radiographic OA at baseline.
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Oláh T, Cai X, Gao L, Walter F, Pape D, Cucchiarini M, Madry H. Quantifying the Human Subchondral Trabecular Bone Microstructure in Osteoarthritis with Clinical CT. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2201692. [PMID: 35670136 PMCID: PMC9376842 DOI: 10.1002/advs.202201692] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/26/2022] [Indexed: 06/12/2023]
Abstract
Osteoarthritis (OA) is characterized by critical alterations of the subchondral bone microstructure, besides the well-known cartilaginous changes. Clinical computed tomography (CT) detection of quantitative 3D microstructural subchondral bone parameters is applied to monitor changes of subchondral bone structure in different stages of human OA and is compared with micro-CT, the gold standard. Determination by clinical CT (287 µm resolution) of key microstructural parameters in tibial plateaus with mild-to-moderate and severe OA reveals strong correlations to micro-CT (35 µm), high inter- and intraobserver reliability, and small relative differences. In vivo, normal, mild-to-moderate, and severe OA are compared with clinical CT (331 µm). All approaches detect characteristic expanded trabecular structure in severe OA and fundamental microstructural correlations with clinical OA stage. Multivariate analyses at various in vivo and ex vivo imaging resolutions always reliably separate mild-to-moderate from severe OA (except mild-to-moderate OA from normal), revealing a striking similarity between 287 µm clinical and 35 µm micro-CT. Thus, accurate structural measurements using clinical CT with a resolution near the trabecular dimensions are possible. Clinical CT offers an opportunity to quantitatively monitor subchondral bone microstructure in clinical and experimental settings as an advanced tool of investigating OA and other diseases affecting bone architecture.
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Affiliation(s)
- Tamás Oláh
- Center of Experimental OrthopaedicsSaarland UniversityKirrberger Straße 100, Building 37Homburg SaarD‐66421Germany
- Cartilage Net of the Greater RegionKirrberger Straße 100, Building 37Homburg SaarD‐66421Germany
| | - Xiaoyu Cai
- Center of Experimental OrthopaedicsSaarland UniversityKirrberger Straße 100, Building 37Homburg SaarD‐66421Germany
| | - Liang Gao
- Center of Experimental OrthopaedicsSaarland UniversityKirrberger Straße 100, Building 37Homburg SaarD‐66421Germany
- Cartilage Net of the Greater RegionKirrberger Straße 100, Building 37Homburg SaarD‐66421Germany
| | - Frédéric Walter
- Clinique d'EichCentre Hospitalier de Luxembourg78 Rue d'EichLuxembourg1460Luxembourg
| | - Dietrich Pape
- Cartilage Net of the Greater RegionKirrberger Straße 100, Building 37Homburg SaarD‐66421Germany
- Clinique d'EichCentre Hospitalier de Luxembourg78 Rue d'EichLuxembourg1460Luxembourg
| | - Magali Cucchiarini
- Center of Experimental OrthopaedicsSaarland UniversityKirrberger Straße 100, Building 37Homburg SaarD‐66421Germany
- Cartilage Net of the Greater RegionKirrberger Straße 100, Building 37Homburg SaarD‐66421Germany
| | - Henning Madry
- Center of Experimental OrthopaedicsSaarland UniversityKirrberger Straße 100, Building 37Homburg SaarD‐66421Germany
- Cartilage Net of the Greater RegionKirrberger Straße 100, Building 37Homburg SaarD‐66421Germany
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Radojčić MR, Perera RS, Chen L, Spector TD, Hart DJ, Ferreira ML, Arden NK. Specific body mass index trajectories were related to musculoskeletal pain and mortality: 19-year follow-up cohort. J Clin Epidemiol 2021; 141:54-63. [PMID: 34537387 PMCID: PMC8982643 DOI: 10.1016/j.jclinepi.2021.09.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 09/06/2021] [Accepted: 09/14/2021] [Indexed: 11/26/2022]
Abstract
OBJECTIVE We aimed to study 19-year body mass index (BMI) patterns and their (1) bidirectional relationship with musculoskeletal pain and (2) mortality risk. STUDY DESIGN AND SETTING We used data from the Chingford study and group-based trajectory modelling to define 19-year BMI patterns. We investigated whether baseline back, hand, hip, and knee pain (as single- and multi-site) predicted 19-year BMI trajectory, and whether 19-year BMI patterns predicted pain in year 20. We explored BMI trajectories and mortality risk over 25 years (life expectancy). RESULTS We included 938 women (mean age: year-1=54, year-20=72) and found seven distinct 19-year BMI trajectories: two normal-weighted (reference), slightly overweight, lower and upper overweight-to-obese, lower and upper obese. BMI patterns capturing the increase overweight-to-obese (BMI 27-34 overtime) were bidirectionally related to knee and multi-site pain. The lower obese pattern (BMI 33-38) was unidirectionally associated with lower limb pain. Women with BMI above 40 had an increased all-cause and cardiovascular mortality risk. CONCLUSION For most postmenopausal women, the overweight WHO category was a transition. Two patterns capturing increase overweight-to-obese were mutually related to musculoskeletal pain, i.e., knee and multi-site pain contributed to becoming obese, and trajectories of becoming obese increased the odds of experiencing pain later.
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Affiliation(s)
- Maja R Radojčić
- Nuffield Department of Orthopedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom; Centre for Sport, Exercise and Osteoarthritis Research vs. Arthritis, University of Oxford, Oxford, United Kingdom.
| | - Romain S Perera
- Nuffield Department of Orthopedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom; Department of Allied Health Sciences, Faculty of Medicine, University of Colombo, Colombo, Sri Lanka
| | - Lingxiao Chen
- Faculty of Medicine and Health, Institute of Bone and Joint Research, The Kolling Institute, University of Sydney, Sydney, Australia
| | - Tim D Spector
- Department of Twin Research and Genetic Epidemiology, King's College London, London, United Kingdom
| | - Deborah J Hart
- Department of Twin Research and Genetic Epidemiology, King's College London, London, United Kingdom
| | - Manuela L Ferreira
- Faculty of Medicine and Health, Institute of Bone and Joint Research, The Kolling Institute, University of Sydney, Sydney, Australia
| | - Nigel K Arden
- Nuffield Department of Orthopedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom; Centre for Sport, Exercise and Osteoarthritis Research vs. Arthritis, University of Oxford, Oxford, United Kingdom
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Khury F, Fuchs M, Awan Malik H, Leiprecht J, Reichel H, Faschingbauer M. Validation of joint space narrowing on plain radiographs and its relevance to partial knee arthroplasty. Bone Joint Res 2021; 10:173-187. [PMID: 33685206 PMCID: PMC7998068 DOI: 10.1302/2046-3758.103.bjr-2020-0216.r1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
AIMS To explore the clinical relevance of joint space width (JSW) narrowing on standardized-flexion (SF) radiographs in the assessment of cartilage degeneration in specific subregions seen on MRI sequences in knee osteoarthritis (OA) with neutral, valgus, and varus alignments, and potential planning of partial knee arthroplasty. METHODS We retrospectively reviewed 639 subjects, aged 45 to 79 years, in the Osteoarthritis Initiative (OAI) study, who had symptomatic knees with Kellgren and Lawrence grade 2 to 4. Knees were categorized as neutral, valgus, and varus knees by measuring hip-knee-angles on hip-knee-ankle radiographs. Femorotibial JSW was measured on posteroanterior SF radiographs using a special software. The femorotibial compartment was divided into 16 subregions, and MR-tomographic measurements of cartilage volume, thickness, and subchondral bone area were documented. Linear regression with adjustment for age, sex, body mass index, and Kellgren and Lawrence grade was used. RESULTS We studied 345 neutral, 87 valgus, and 207 varus knees. Radiological JSW narrowing was significantly (p < 0.01) associated with cartilage volume and thickness in medial femorotibial compartment in neutral (r = 0.78, odds ratio (OR) 2.33) and varus knees (r = 0.86, OR 1.92), and in lateral tibial subregions in valgus knees (r = 0.87, OR 3.71). A significant negative correlation was found between JSW narrowing and area of subchondral bone in external lateral tibial subregion in valgus knees (r = -0.65, p < 0.01) and in external medial tibial subregion in varus knees (r = -0.77, p < 0.01). No statistically significant correlation was found in anterior and posterior subregions. CONCLUSION SF radiographs can be potentially used for initial detection of cartilage degeneration as assessed by MRI in medial and lateral but not in anterior or posterior subregions. Cite this article: Bone Joint Res 2021;10(3):173-187.
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Affiliation(s)
- Farouk Khury
- Department of Orthopedic Surgery, University of Ulm, Ulm, Germany.,Division of Orthopedic Surgery, Rambam Medical Center, The Ruth and Bruce Rappaport Faculty of Medicine, Haifa, Israel
| | - Michael Fuchs
- Department of Orthopedic Surgery, University of Ulm, Ulm, Germany
| | | | - Janina Leiprecht
- Department of Orthopedic Surgery, University of Ulm, Ulm, Germany
| | - Heiko Reichel
- Department of Orthopedic Surgery, University of Ulm, Ulm, Germany
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13
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Clinical and biochemical factors associated with risk of total joint replacement and radiographic progression in osteoarthritis: Data from two phase III clinical trials. Semin Arthritis Rheum 2020; 50:1374-1381. [DOI: 10.1016/j.semarthrit.2020.03.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/07/2020] [Accepted: 03/12/2020] [Indexed: 01/08/2023]
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14
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Bowes MA, Kacena K, Alabas OA, Brett AD, Dube B, Bodick N, Conaghan PG. Machine-learning, MRI bone shape and important clinical outcomes in osteoarthritis: data from the Osteoarthritis Initiative. Ann Rheum Dis 2020; 80:502-508. [PMID: 33188042 PMCID: PMC7958089 DOI: 10.1136/annrheumdis-2020-217160] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 10/21/2020] [Accepted: 10/23/2020] [Indexed: 12/15/2022]
Abstract
Objectives Osteoarthritis (OA) structural status is imperfectly classified using radiographic assessment. Statistical shape modelling (SSM), a form of machine-learning, provides precise quantification of a characteristic 3D OA bone shape. We aimed to determine the benefits of this novel measure of OA status for assessing risks of clinically important outcomes. Methods The study used 4796 individuals from the Osteoarthritis Initiative cohort. SSM-derived femur bone shape (B-score) was measured from all 9433 baseline knee MRIs. We examined the relationship between B-score, radiographic Kellgren-Lawrence grade (KLG) and current and future pain and function as well as total knee replacement (TKR) up to 8 years. Results B-score repeatability supported 40 discrete grades. KLG and B-score were both associated with risk of current and future pain, functional limitation and TKR; logistic regression curves were similar. However, each KLG included a wide range of B-scores. For example, for KLG3, risk of pain was 34.4 (95% CI 31.7 to 37.0)%, but B-scores within KLG3 knees ranged from 0 to 6; for B-score 0, risk was 17.0 (16.1 to 17.9)% while for B-score 6, it was 52.1 (48.8 to 55.4)%. For TKR, KLG3 risk was 15.3 (13.3 to 17.3)%; while B-score 0 had negligible risk, B-score 6 risk was 35.6 (31.8 to 39.6)%. Age, sex and body mass index had negligible effects on association between B-score and symptoms. Conclusions B-score provides reader-independent quantification using a single time-point, providing unambiguous OA status with defined clinical risks across the whole range of disease including pre-radiographic OA. B-score heralds a step-change in OA stratification for interventions and improved personalised assessment, analogous to the T-score in osteoporosis.
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Affiliation(s)
| | | | - Oras A Alabas
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, University of Leeds School of Medicine, Leeds, UK
| | | | - Bright Dube
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, University of Leeds School of Medicine, Leeds, UK
| | - Neil Bodick
- Clinical Research and Medical Affairs, Flexion Therapeutics. Inc, Burlington, Massachusetts, USA
| | - Philip G Conaghan
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, University of Leeds School of Medicine, Leeds, UK
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15
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Roemer FW, Collins J, Kwoh CK, Hannon MJ, Neogi T, Felson DT, Hunter DJ, Lynch JA, Guermazi A. MRI-based screening for structural definition of eligibility in clinical DMOAD trials: Rapid OsteoArthritis MRI Eligibility Score (ROAMES). Osteoarthritis Cartilage 2020; 28:71-81. [PMID: 31513920 PMCID: PMC7235947 DOI: 10.1016/j.joca.2019.08.005] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 08/06/2019] [Accepted: 08/28/2019] [Indexed: 02/02/2023]
Abstract
PURPOSE Our aim was to introduce a simplified MRI instrument, Rapid OsteoArthritis MRI Eligibility Score (ROAMES), for defining structural eligibility of patients for inclusion in disease-modifying osteoarthritis drug trials using a tri-compartmental anatomic approach that enables stratification of knees into different structural phenotypes and includes diagnoses of exclusion. We also aimed to define overlap between phenotypes and determine reliability. METHODS 50 knees from the Foundation for National Institutes of Health Osteoarthritis Biomarkers study, a nested case-control study within the Osteoarthritis Initiative, were selected within pre-defined definitions of phenotypes as either inflammatory, subchondral bone, meniscus/cartilage, atrophic or hypertrophic. A focused scoring instrument was developed covering cartilage, meniscal damage, inflammation and osteophytes. Diagnoses of exclusion were meniscal root tears, osteonecrosis, subchondral insufficiency fracture, tumors, malignant marrow infiltration and acute traumatic changes. Reliability was determined using weighted kappa statistics. Descriptive statistics were used for determining concordance between the a priori phenotypic definition and ROAMES and overlap between phenotypes. RESULTS ROAMES identified 43 of 50 (86%) pre-defined phenotypes correctly. Of the 50 participants, 27 (54%) had no additional phenotypes other than the pre-defined phenotype. 18 (36%) had one and 5 (10%) had two additional phenotypes. None had three or four additional phenotypes. All features of ROAMES showed almost perfect agreement. One case with osteonecrosis and one with a tumor were detected. CONCLUSIONS ROAMES is able to screen and stratify potentially eligible knees into different structural phenotypes and record relevant diagnoses of exclusion. Reliability of the instrument showed almost perfect agreement.
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Affiliation(s)
- Frank W. Roemer
- Quantitative Imaging Center, Department of Radiology, Boston University School of Medicine, FGH Building, 4th floor, 820 Harrison Avenue, Boston, MA 02118, USA,Department of Radiology, Friedrich-Alexander University Erlangen-Nürnberg (FAU) and Universitätsklinikum Erlangen, Erlangen, Germany, Maximiliansplatz 3, 91054 Erlangen, Germany
| | - Jamie Collins
- Orthopaedics and Arthritis Center of Outcomes Research, Brigham and Women’s Hospital, Harvard Medical, School, 75 Francis Street, BTM Suite 5016 Boston, MA 02115 Boston, Massachusetts
| | - C. Kent Kwoh
- University of Arizona Arthritis Center & University of Arizona College of Medicine, 1501 N Campbell Ave, Tucson, AZ 85724, USA
| | - Michael J. Hannon
- Pinney Associates, 201 N Craig St # 320, Pittsburgh, PA 15213, USA & Division of Rheumatology and Clinical Immunology, University of Pittsburgh School of Medicine, S700 Biomedical Science Tower, 3500 Terrace Street, Pittsburgh, PA 15261, USA (former affiliation at time of study)
| | - Tuhina Neogi
- Boston University School of Medicine, Section of Rheumatology, 650 Albany Street, Suite X-20, Boston, MA, 02118, USA
| | - David T. Felson
- Boston University School of Medicine, Section of Rheumatology, 650 Albany Street, Suite X-20, Boston, MA, 02118, USA
| | - David J. Hunter
- Department of Rheumatology, Royal North Shore Hospital and Institute of Bone and Joint Research, Kolling Institute, University of Sydney, Pacific Hwy, St Leonards, NSW 2065, Australia
| | - John A. Lynch
- Department of Epidemiology and Biostatistics, University of California San Francisco, 550 16th St, San Francisco, CA 94158, USA
| | - Ali Guermazi
- Quantitative Imaging Center, Department of Radiology, Boston University School of Medicine, FGH Building, 4th floor, 820 Harrison Avenue, Boston, MA 02118, USA
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Kraus VB, Simon LS, Katz JN, Neogi T, Hunter D, Guermazi A, Karsdal MA. Proposed study designs for approval based on a surrogate endpoint and a post-marketing confirmatory study under FDA's accelerated approval regulations for disease modifying osteoarthritis drugs. Osteoarthritis Cartilage 2019; 27:571-579. [PMID: 30465809 DOI: 10.1016/j.joca.2018.11.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 10/31/2018] [Accepted: 11/08/2018] [Indexed: 02/02/2023]
Abstract
In 1992, the Food and Drug Administration (FDA) instituted the accelerated approval regulations that allow drugs or biologics for serious conditions that fill an unmet medical need to be approved on the basis of a surrogate endpoint or an intermediate clinical endpoint. The current definition of a serious condition includes chronic disabling conditions, such as osteoarthritis (OA), and thereby provides expanded opportunities for the use of biomarkers for regulatory approval of drugs for OA. The use of surrogates or intermediate clinical endpoints for initial regulatory approval of a drug or biologic requires confirmation in a post-marketing study of a drug effect on a clinically relevant outcome, such as on how a patient feels, functions or survives. Current FDA guidance requires that the post-marketing approval (PMA) study be ongoing during the time of initial drug approval. This white paper arose out of the need to brainstorm trial designs that might be suitable for PMA of drugs initially approved, on the basis of a surrogate or intermediate clinical endpoint, for treatment of OA to alter disease progression, abnormal function or pathological changes in the morphology of the joint. In this white paper we define the concept and regulations regarding accelerated approval and propose two major study design scenarios for PMA trials in OA. The long-term goal is to discuss and refine these designs in consultation with regulatory agencies in order to facilitate development of drugs to fill the large unmet need in OA.
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Affiliation(s)
- V B Kraus
- Duke Molecular Physiology Institute, Division of Rheumatology, Department of Medicine, Duke University School of Medicine, Durham, NC, USA.
| | | | - J N Katz
- Brigham and Women's Hospital, Boston, MA, USA
| | - T Neogi
- Boston University School of Medicine, Boston Medical Center, Boston, MA, USA
| | - D Hunter
- University of Sydney, Sydney, Australia
| | - A Guermazi
- Quantitative Imaging Center, Department of Radiology, Boston University School of Medicine, Boston, MA, USA
| | - M A Karsdal
- Nordic Bioscience A/S, Herlev Hovedgade 207, DK-2730 Herlev, Denmark
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17
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Omoumi P, Babel H, Jolles BM, Favre J. Relationships between cartilage thickness and subchondral bone mineral density in non-osteoarthritic and severely osteoarthritic knees: In vivo concomitant 3D analysis using CT arthrography. Osteoarthritis Cartilage 2019; 27:621-629. [PMID: 30611905 DOI: 10.1016/j.joca.2018.12.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 12/18/2018] [Accepted: 12/23/2018] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To test whether subchondral bone mineral density (sBMD) and cartilage thickness (CTh) of femoral condyles are correlated in knees without and with severe medial femorotibial osteoarthritis (OA), using a subregional analysis with computerized tomography (CT) arthrography. METHODS CT arthrograms of 50 non-OA (18 males, 58.7 (interquartile range (IQR) = 6.6 years)) and 50 severe medial OA (24 males, 60.5 (IQR = 10.7) years) knees, were retrospectively analyzed. Bone and cartilage were segmented using custom-designed software, leading to 3D models on which each point of the subchondral surface is given a CTh and sBMD value. The average sBMD and CTh were then calculated for the entire weight-bearing regions as well as specific subregions of interest. Linear bivariate and multivariable analyses were performed to test for relationships between sBMD and CTh (regional and subregional measures, or medial-to-lateral ratios), with confounders of age, gender, femoral bone size and femorotibial angle. RESULTS In non-OA knees, the sBMD and CTh medial-to-lateral ratios were positively correlated for the total region and the external and internal subregions (r ≥ 0.341, P ≤ 0.015). In OA knees, sBMD and CTh medial-to-lateral ratios were negatively correlated for the total region and the external and central subregions (r ≤ -0.538, P < 0.001). Additional positive/negative relationships in the non-OA/OA knees were observed between sBMD and CTh measures in the medial compartment. CONCLUSIONS The positive correlation between sBMD and CTh in non-OA knees, and the negative one in OA knees, bring support to the theory of a subchondral bone/cartilage functional unit, which could help to better understand the pathophysiology of OA.
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Affiliation(s)
- P Omoumi
- Department of Diagnostic and Interventional Radiology, Centre Hospitalier Universitaire and University of Lausanne, Lausanne, Switzerland; Department of Radiology, Cliniques Universitaires St Luc - UC Louvain, Brussels, Belgium; Swiss BioMotion Lab, Department of Musculoskeletal Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland.
| | - H Babel
- Swiss BioMotion Lab, Department of Musculoskeletal Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - B M Jolles
- Swiss BioMotion Lab, Department of Musculoskeletal Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland; Institute of Micro Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - J Favre
- Swiss BioMotion Lab, Department of Musculoskeletal Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
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18
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Sarmanova A, Hall M, Fernandes GS, Valdes AM, Walsh DA, Doherty M, Zhang W. Thresholds of ultrasound synovial abnormalities for knee osteoarthritis - a cross sectional study in the general population. Osteoarthritis Cartilage 2019; 27:435-443. [PMID: 30448531 PMCID: PMC6414397 DOI: 10.1016/j.joca.2018.09.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 09/05/2018] [Accepted: 09/18/2018] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To establish "normal" ranges for synovial thickness and effusion detected by ultrasound (US) and to determine cut-offs associated with knee pain (KP) and radiographic knee osteoarthritis (RKOA) in the community. METHODS 147 women and 152 men ≥40 years old were randomly selected from the Nottingham KP and Related Health in the Community (KPIC) cohort (n = 9506). The "normal" range was established using the percentile method in 163 participants who had no KP and no RKOA. Optimal (maximum sensitivity and specificity) and high specificity (90%) cut-offs were established using receiver operating characteristic (ROC) curve analysis in a comparison between people with both KP and RKOA and normal controls. RESULTS Effusion and synovial hypertrophy differed by gender but not by age or laterality, therefore gender-specific reference limits were estimated. However, the "normal" ranges between men and women were similar for effusion (0-10.3 mm vs 0-9.8 mm), but different for synovial hypertrophy (0-6.8 mm vs 0-5.4 mm). Power Doppler Signal (PDS) in the healthy controls was uncommon (1.2% in men and 0.0% in women). The optimal cut-off was 7.4 mm for men and 5.3 mm for women for effusion, and 3.7 and 1.6 for hypertrophy respectively. The high specificity cut-off was 8.9 for men and 7.8 for women for effusion, and 5.8 and 4.2 for hypertrophy respectively. CONCLUSIONS US effusion and synovial hypertrophy but not PDS are common, but differ by gender, in community-derived people without painful knee OA. Currently used cut-offs for abnormality need reappraisal.
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Affiliation(s)
- A Sarmanova
- Division of Rheumatology, Orthopaedics and Dermatology, School of Medicine, University of Nottingham, UK; Arthritis Research UK Pain Centre, and NIHR Nottingham BRC, Nottingham, UK.
| | - M Hall
- Arthritis Research UK Pain Centre, and NIHR Nottingham BRC, Nottingham, UK; School of Health Sciences, University of Nottingham, UK.
| | - G S Fernandes
- Division of Rheumatology, Orthopaedics and Dermatology, School of Medicine, University of Nottingham, UK; Arthritis Research UK Pain Centre, and NIHR Nottingham BRC, Nottingham, UK; Arthritis Research UK Centre for Sports, Exercise and Osteoarthritis, Nottingham, UK.
| | - A M Valdes
- Division of Rheumatology, Orthopaedics and Dermatology, School of Medicine, University of Nottingham, UK; Arthritis Research UK Pain Centre, and NIHR Nottingham BRC, Nottingham, UK.
| | - D A Walsh
- Division of Rheumatology, Orthopaedics and Dermatology, School of Medicine, University of Nottingham, UK; Arthritis Research UK Pain Centre, and NIHR Nottingham BRC, Nottingham, UK; Arthritis Research UK Centre for Sports, Exercise and Osteoarthritis, Nottingham, UK.
| | - M Doherty
- Division of Rheumatology, Orthopaedics and Dermatology, School of Medicine, University of Nottingham, UK; Arthritis Research UK Pain Centre, and NIHR Nottingham BRC, Nottingham, UK; Arthritis Research UK Centre for Sports, Exercise and Osteoarthritis, Nottingham, UK.
| | - W Zhang
- Division of Rheumatology, Orthopaedics and Dermatology, School of Medicine, University of Nottingham, UK; Arthritis Research UK Pain Centre, and NIHR Nottingham BRC, Nottingham, UK; Arthritis Research UK Centre for Sports, Exercise and Osteoarthritis, Nottingham, UK.
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19
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Felson DT, Neogi T. Emerging Treatment Models in Rheumatology: Challenges for Osteoarthritis Trials. Arthritis Rheumatol 2018; 70:1175-1181. [PMID: 29609224 DOI: 10.1002/art.40515] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 03/27/2018] [Indexed: 12/14/2022]
Abstract
At a time when advancing understanding of osteoarthritis (OA) has created opportunities for new treatments, development of treatments has remained considerably behind advances in other rheumatic diseases. We describe elements of trial design and measurements that have inhibited success and offer suggestions that may help break the log jam. Among the problems with trials that include pain as an outcome measure are reliance on a single, non-optimal pain outcome, overestimation of likely effects of treatments on pain, and failure to identify patient subgroups most likely to respond to specific treatments. With regard to the use of structure modification as an outcome measure, demonstrating structure modification is often highly challenging, even with the use of magnetic resonance imaging. Many OA patients have advanced disease that is unlikely to respond to treatments that prevent cartilage loss. Further, prevention of cartilage loss and reduction of pain correlate weakly at best, and in at least some patients, reduction in pain may actually increase joint damage, making it impossible to demonstrate dual treatment effects on structure and pain in such scenarios. For structure outcomes, treatment effects on pain-sensitive structures such as bone and synovium may be more achievable than preventing cartilage loss. We suggest that changes in trial design related to some of these issues may increase the chances that new exciting and effective OA treatments will become available.
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Affiliation(s)
- David T Felson
- Boston University School of Medicine, Boston, Massachusetts
| | - Tuhina Neogi
- Boston University School of Medicine, Boston, Massachusetts
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20
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Soul J, Dunn SL, Anand S, Serracino-Inglott F, Schwartz JM, Boot-Handford RP, Hardingham TE. Stratification of knee osteoarthritis: two major patient subgroups identified by genome-wide expression analysis of articular cartilage. Ann Rheum Dis 2017; 77:423. [PMID: 29273645 PMCID: PMC5867416 DOI: 10.1136/annrheumdis-2017-212603] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 11/21/2017] [Accepted: 11/28/2017] [Indexed: 12/13/2022]
Abstract
Introduction Osteoarthritis (OA) is a heterogeneous and complex disease. We have used a network biology approach based on genome-wide analysis of gene expression in OA knee cartilage to seek evidence for pathogenic mechanisms that may distinguish different patient subgroups. Methods Results from RNA-Sequencing (RNA-Seq) were collected from intact knee cartilage at total knee replacement from 44 patients with OA, from 16 additional patients with OA and 10 control patients with non-OA. Results were analysed to identify patient subsets and compare major active pathways. Results The RNA-Seq results showed 2692 differentially expressed genes between OA and non-OA. Analysis by unsupervised clustering identified two distinct OA groups: Group A with 24 patients (55%) and Group B with 18 patients (41%). A 10 gene subgroup classifier was validated by RT-qPCR in 16 further patients with OA. Pathway analysis showed increased protein expression in both groups. PhenomeExpress analysis revealed group differences in complement activation, innate immune responses and altered Wnt and TGFβ signalling, but no activation of inflammatory cytokine expression. Both groups showed suppressed circadian regulators and whereas matrix changes in Group A were chondrogenic, in Group B they were non-chondrogenic with changes in mechanoreceptors, calcium signalling, ion channels and in cytoskeletal organisers. The gene expression changes predicted 478 potential biomarkers for detection in synovial fluid to distinguish patients from the two groups. Conclusions Two subgroups of knee OA were identified by network analysis of RNA-Seq data with evidence for the presence of two major pathogenic pathways. This has potential importance as a new basis for the stratification of patients with OA for drug trials and for the development of new targeted treatments.
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Affiliation(s)
- Jamie Soul
- Wellcome Trust Centre for Cell-Matrix Research, Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Sara L Dunn
- Wellcome Trust Centre for Cell-Matrix Research, Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Sanjay Anand
- Department of Orthopaedic Surgery, Stockport NHS Foundation Trust, Stockport, UK
| | | | - Jean-Marc Schwartz
- Division of Evolution and Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Ray P Boot-Handford
- Wellcome Trust Centre for Cell-Matrix Research, Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Tim E Hardingham
- Wellcome Trust Centre for Cell-Matrix Research, Division of Cell-Matrix Biology and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
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21
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Neogi T, Li S, Peloquin C, Misra D, Zhang Y. Effect of bisphosphonates on knee replacement surgery. Ann Rheum Dis 2017; 77:92-97. [PMID: 28988204 DOI: 10.1136/annrheumdis-2017-211811] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 08/11/2017] [Accepted: 09/08/2017] [Indexed: 11/03/2022]
Abstract
PURPOSE Bone remodelling as a therapeutic target in knee osteoarthritis (OA) has gained much interest, but the effects of antiresorptive agents on knee OA have been conflicting, with no studies to date examining the effects of bisphosphonate use on the clinically relevant endpoint of knee replacement (KR) surgery. METHODS We used data from The Health Improvement Network (THIN), a general practitioner electronic medical records representative of the general UK population. We identified older women who had initiated bisphosphonate use after their incident knee OA diagnosis. Each bisphosphonate initiator was propensity score-matched with a non-initiator within each 1-year cohort accrual block. The effect of bisphosphonates on the risk of KR was assessed using Cox proportional hazard regression. Sensitivity analyses to address residual confounding were also conducted. RESULTS We identified 2006 bisphosphonate initiators, who were matched to 2006 non-initiators(mean age 76, mean body mass index 27), with mean follow-up time of 3 years. The crude incidence rate of KR was 22.0 per 1000 person-years among the initiators, and 29.1 among the non-initiators. Bisphosphonate initiators had 26% lower risk of KR than non-initiators(HR 0.74, 95% CI 0.59 to 0.93); these results were similar when additionally adjusted for potential confounders in the propensity score (HR 0.76, 95% CI 0.60 to 0.95). Results of sensitivity analyses supported this protective effect. CONCLUSIONS In this population-based cohort of older women with incident knee OA, those with incident bisphosphonate users had lower risk of KR than non-users of bisphosphonates, suggesting a potential beneficial effect of bisphosphonates on knee OA.
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Affiliation(s)
- Tuhina Neogi
- Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Shanshan Li
- Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Christine Peloquin
- Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Devyani Misra
- Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Yuqing Zhang
- Clinical Epidemiology Research and Training Unit, Boston University School of Medicine, Boston, Massachusetts, USA
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Segal NA, Frick E, Duryea J, Nevitt MC, Niu J, Torner JC, Felson DT, Anderson DD. Comparison of tibiofemoral joint space width measurements from standing CT and fixed flexion radiography. J Orthop Res 2017; 35:1388-1395. [PMID: 27504863 PMCID: PMC5299055 DOI: 10.1002/jor.23387] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 07/29/2016] [Indexed: 02/04/2023]
Abstract
The objective of this project was to determine the relationship between medial tibiofemoral joint space width measured on fixed-flexion radiographs and the three-dimensional joint space width distribution on low-dose, standing CT (SCT) imaging. At the 84-month visit of the Multicenter Osteoarthritis Study, 20 participants were recruited. A commercial SCT scanner for the foot and ankle was modified to image knees while standing. Medial tibiofemoral joint space width was assessed on radiographs at fixed locations from 15% to 30% of compartment width using validated software and on SCT by mapping the distances between three-dimensional subchondral bone surfaces. Individual joint space width values from radiographs were compared with three-dimensional joint space width values from corresponding sagittal plane locations using paired t-tests and correlation coefficients. For the four medial-most tibiofemoral locations, radiographic joint space width values exceeded the minimal joint space width on SCT by a mean of 2.0 mm and were approximately equal to the 61st percentile value of the joint space width distribution at each respective sagittal-plane location. Correlation coefficients at these locations were 0.91-0.97 and the offsets between joint space width values from radiographs and SCT measurements were consistent. There were greater offsets and variability in the offsets between modalities closer to the tibial spine. Joint space width measurements on fixed-flexion radiographs are highly correlated with three-dimensional joint space width from SCT. In addition to avoiding bony overlap obscuring the joint, a limitation of radiographs, the current study supports a role for SCT in the evaluation of tibiofemoral OA. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:1388-1395, 2017.
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Affiliation(s)
- Neil A. Segal
- Department of Rehabilitation, The University of Kansas (Kansas City, KS)
- Department of Epidemiology, The University of Iowa College of Public Health (Iowa City, IA)
| | - Eric Frick
- Department of Orthopaedics & Rehabilitation, The University of Iowa (Iowa City, IA)
| | - Jeffrey Duryea
- Brigham and Women's Hospital/Harvard Medical School (Boston, MA, USA)
| | - Michael C. Nevitt
- Department of Epidemiology & Biostatistics, University of California, San Francisco (San Francisco, CA)
| | - Jingbo Niu
- Clinical Epidemiology Research & Training Unit, Boston University School of Medicine (Boston, MA)
| | - James C. Torner
- Department of Epidemiology, The University of Iowa College of Public Health (Iowa City, IA)
| | - David T. Felson
- Clinical Epidemiology Research & Training Unit, Boston University School of Medicine (Boston, MA)
| | - Donald D. Anderson
- Department of Orthopaedics & Rehabilitation, The University of Iowa (Iowa City, IA)
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Segal NA, Frick E, Duryea J, Roemer F, Guermazi A, Nevitt MC, Torner JC, Felson DT, Anderson DD. Correlations of Medial Joint Space Width on Fixed-Flexed Standing Computed Tomography and Radiographs With Cartilage and Meniscal Morphology on Magnetic Resonance Imaging. Arthritis Care Res (Hoboken) 2017; 68:1410-6. [PMID: 26991547 DOI: 10.1002/acr.22888] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 01/11/2016] [Accepted: 03/15/2016] [Indexed: 12/24/2022]
Abstract
OBJECTIVE To assess whether medial tibiofemoral joint space width (JSW) on 3-dimensional (3-D) standing computed tomography (SCT) correlates more closely with magnetic resonance imaging cartilage morphology (CM) and meniscal scores than does radiographic 2-D JSW. METHODS Participants in the Multicenter Osteoarthritis Study, who had standing fixed-flexion posteroanterior knee radiographs, were recruited. Medial tibiofemoral 3-D JSW on SCT and 2-D JSW on fixed-flexion radiographs were compared with medial tibiofemoral cartilage and meniscal morphology using the Whole-Organ Magnetic Resonance Imaging Score (WORMS). Associations between the area of the articular surface with 3-D JSW <2.5 mm on SCT, radiographic minimal 2-D JSW, and the WORMS-CM and meniscal scores were assessed using Spearman's rho. RESULTS For the 19 participants included (33 knees), mean ± SD age was 66.9 ± 5.4 years, body mass index was 29.5 ± 4.4 kg/m(2) , 42.1% of participants were female, and the Kellgren/Lawrence grades were 0 (21.2%), 1 (36.4%), 2 (18.2%), and 3 (24.2%). The articular surface area with 3-D JSW <2.5 mm on SCT correlated with WORMS-CM scores for the central medial tibia (rs = 0.84, P < 0.001), central medial femur (rs = 0.60, P < 0.007), and posterior medial meniscal tear (rs = 0.39, P < 0.026), as did other cut points for 3-D JSW. Correlations with radiographic minimal 2-D JSW were -0.66, -0.52, and -0.40, respectively, differing from SCT only for tibial cartilage (P = 0.001). CONCLUSION Greater surface area with a low JSW, measured by SCT, correlates more strongly with the severity of tibial cartilage lesions, while correlating with medial femoral cartilage and meniscal damage to a similar extent as radiographic minimal JSW. SCT may enable valid stratification of participants in clinical trials, through quickly and inexpensively characterizing osteoarthritis features.
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Affiliation(s)
- N A Segal
- University of Kansas, Kansas City, and University of Iowa, Iowa City.
| | - E Frick
- University of Iowa, Iowa City
| | - J Duryea
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - F Roemer
- Boston University, Boston, Massachusetts
| | - A Guermazi
- Boston University, Boston, Massachusetts
| | | | | | - D T Felson
- Boston University, Boston, Massachusetts
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Roemer FW, Miller CG, West CR, Brown MT, Sherlock SP, Kompel AJ, Diaz L, Galante N, Crema MD, Guermazi A. Development of an imaging mitigation strategy for patient enrolment in the tanezumab nerve growth factor inhibitor (NGF-ab) program with a focus on eligibility assessment. Semin Arthritis Rheum 2017. [PMID: 28624172 DOI: 10.1016/j.semarthrit.2017.05.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
OBJECTIVE Nerve growth factor antibodies (NGF-ab) have shown promising analgesic efficacy. Aim was to describe reader training efforts and present reliability data focusing on radiographic eligibility in the tanezumab program. METHODS A multi-step process was used for reader calibration and reliability testing. First, a reference standard set of cases was created and diagnostic performance was evaluated. A second exercise focused on agreement of ordinal assessment (Kellgren-Lawrence grading) of radiographic osteoarthritis. Subsequently, 11 readers were trained and read a test set of 100 cases focused on eligibility assessments. Additional reliability testing and calibration of five core readers assessing eligibility of 30 cases was performed 3 and 6 months after study start. RESULTS Sensitivity for the reference standard readings ranged from 0.50 to 0.90 and specificity from 0.40 to 0.83. Overall agreement for Kellgren-Lawrence grading ranged from 71.4% to 82.9%. For the 11 reader exercise, in 76% of cases at least 8 of 11 readers agreed on eligibility status. For the reliability testing 3 months after study start, in 80.0% of cases at least 4 of 5 readers agreed on eligibility with a κ = 0.43 (95% CI: 0.32-0.54). For the reliability testing after 6 months, in 83.3% of cases at least 4 of 5 readers agreed on eligibility with a κ = 0.52 (95% CI: 0.41-0.63). CONCLUSIONS After intense efforts spent in the development of an imaging program for an NGF-ab clinical program, the achieved reliability for eligibility assessment is substantial but not perfect. Ongoing efforts of calibration prior to including additional readers to the program and during study conduct between current readers will be needed to ensure agreement on potential adverse events and radiographic disease severity.
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Affiliation(s)
- Frank W Roemer
- Quantitative Imaging Center (QIC), Department of Radiology, Boston University School of Medicine, Boston, MA; Department of Radiology, University of Erlangen-Nuremberg, Erlangen, Germany.
| | | | | | | | | | - Andrew J Kompel
- Quantitative Imaging Center (QIC), Department of Radiology, Boston University School of Medicine, Boston, MA
| | - Luis Diaz
- Department of Radiology, Boston Veterans Affairs Healthcare System, Boston, MA
| | | | - Michel D Crema
- Quantitative Imaging Center (QIC), Department of Radiology, Boston University School of Medicine, Boston, MA; Department of Radiology, Saint-Antoine Hospital, Paris VI University, Paris, France
| | - Ali Guermazi
- Quantitative Imaging Center (QIC), Department of Radiology, Boston University School of Medicine, Boston, MA
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Segal NA, Bergin J, Kern A, Findlay C, Anderson DD. Test-retest reliability of tibiofemoral joint space width measurements made using a low-dose standing CT scanner. Skeletal Radiol 2017; 46:217-222. [PMID: 27909787 PMCID: PMC5179299 DOI: 10.1007/s00256-016-2539-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 10/21/2016] [Accepted: 11/17/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To determine the test-retest reliability of knee joint space width (JSW) measurements made using standing CT (SCT) imaging. SUBJECTS AND METHODS This prospective two-visit study included 50 knees from 30 subjects (66% female; mean ± SD age 58.2 ± 11.3 years; BMI 29.1 ± 5.6 kg/m2; 38% KL grade 0-1). Tibiofemoral geometry was obtained from bilateral, approximately 20° fixed-flexed SCT images acquired at visits 2 weeks apart. For each compartment, the total joint area was defined as the area with a JSW <10 mm. The summary measurements of interest were the percentage of the total joint area with a JSW less than 0.5-mm thresholds between 2.0 and 5.0 mm in each tibiofemoral compartment. Test-retest reliability of the summary JSW measurements was assessed by intraclass correlation coefficients (ICC 2,1) for the percentage area engaged at each threshold of JSW and root-mean-square errors (RMSE) were calculated to assess reproducibility. RESULTS The ICCs were excellent for each threshold assessed, ranging from 0.95 to 0.97 for the lateral and 0.90 to 0.97 for the medial compartment. RMSE ranged from 1.1 to 7.2% for the lateral and from 3.1 to 9.1% for the medial compartment, with better reproducibility at smaller JSW thresholds. CONCLUSION The knee joint positioning protocol used demonstrated high day-to-day reliability for SCT 3D tibiofemoral JSW summary measurements repeated 2 weeks apart. Low-dose SCT provides a great deal of information about the joint while maintaining high reliability, making it a suitable alternative to plain radiographs for evaluating JSW in people with knee OA.
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Affiliation(s)
- Neil A. Segal
- Professor, Department of Rehabilitation Medicine, The University of Kansas (Kansas City, KS)
| | | | | | | | - Donald D. Anderson
- Professor, Department of Orthopaedics and Rehabilitation, The University of Iowa (Iowa City, IA)
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Janvier T, Jennane R, Valery A, Harrar K, Delplanque M, Lelong C, Loeuille D, Toumi H, Lespessailles E. Subchondral tibial bone texture analysis predicts knee osteoarthritis progression: data from the Osteoarthritis Initiative: Tibial bone texture & knee OA progression. Osteoarthritis Cartilage 2017; 25:259-266. [PMID: 27742531 DOI: 10.1016/j.joca.2016.10.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 09/21/2016] [Accepted: 10/05/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVES To examine whether trabecular bone texture (TBT) parameters assessed on computed radiographs could predict knee osteoarthritis (OA) progression. METHODS This study was performed using data from the Osteoarthritis Initiative (OAI). 1647 knees in 1124 patients had bilateral fixed flexion radiographs acquired 48 months apart. Images were semi-automatically segmented to extract a patchwork of regions of interest (ROI). A fractal texture analysis was performed using different methods. OA progression was defined as an increase in the joint space narrowing (JSN) over 48 months. The predictive ability of TBT was evaluated using logistic regression and receiver operating characteristic (ROC) curve. An optimization method for features selection was used to reduce the size of models and assess the impact of each ROI. RESULTS Fractal dimensions (FD's) were predictive of the JSN progression for each method tested with an area under the ROC curve (AUC) up to 0.71. Baseline JSN grade was not correlated with TBT parameters (R < 0.21) but had the same predictive capacity (AUC 0.71). The most predictive model included the clinical covariates (age, gender, body mass index (BMI)), JSN and TBT parameters (AUC 0.77). From a statistical point of view we found higher differences in TBT parameters computed in medial ROI between progressors and non-progressors. However, the integration of TBT results from the whole patchwork including the lateral ROIs in the model provided the best predictive model. CONCLUSIONS Our findings indicate that TBT parameters assessed in different locations in the joint provided a good predictive ability to detect knee OA progression.
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Affiliation(s)
- T Janvier
- Univ. Orléans, I3MTO Laboratory, EA 4708, 45067 Orléans, France
| | - R Jennane
- Univ. Orléans, I3MTO Laboratory, EA 4708, 45067 Orléans, France
| | - A Valery
- CHR Orléans, Service de Rhumatologie, 45032 Orléans, France
| | - K Harrar
- Univ. M'Hamed Bougara Boumerdes, 35000 Boumerdes, Algeria
| | | | - C Lelong
- Med-Imaps SASU, 337700 Mérignac, France
| | - D Loeuille
- UMR 7561 - CHRU Nancy, 54511 Vandoeuvre les Nancy, France
| | - H Toumi
- Univ. Orléans, I3MTO Laboratory, EA 4708, 45067 Orléans, France; CHR Orléans, Service de Rhumatologie, 45032 Orléans, France
| | - E Lespessailles
- Univ. Orléans, I3MTO Laboratory, EA 4708, 45067 Orléans, France; CHR Orléans, Service de Rhumatologie, 45032 Orléans, France.
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27
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Eckstein F, Buck R, Wirth W. Location-independent analysis of structural progression of osteoarthritis—Taking it all apart, and putting the puzzle back together makes the difference. Semin Arthritis Rheum 2017; 46:404-410. [DOI: 10.1016/j.semarthrit.2016.08.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 08/12/2016] [Accepted: 08/23/2016] [Indexed: 10/21/2022]
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Link TM, Neumann J, Li X. Prestructural cartilage assessment using MRI. J Magn Reson Imaging 2016; 45:949-965. [PMID: 28019053 DOI: 10.1002/jmri.25554] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 10/25/2016] [Indexed: 12/20/2022] Open
Abstract
Cartilage loss is irreversible, and to date, no effective pharmacotherapies are available to protect or regenerate cartilage. Quantitative prestructural/compositional MR imaging techniques have been developed to characterize the cartilage matrix quality at a stage where abnormal findings are early and potentially reversible, allowing intervention to halt disease progression. The goal of this article is to critically review currently available technologies, present the basic concept behind these techniques, but also to investigate their suitability as imaging biomarkers including their validity, reproducibility, risk prediction and monitoring of therapy. Moreover, we highlighted important clinical applications. This review article focuses on the currently most relevant and clinically applicable technologies, such as T2 mapping, T2*, T1ρ, delayed gadolinium enhanced MRI of cartilage (dGEMRIC), sodium imaging and glycosaminoglycan chemical exchange saturation transfer (gagCEST). To date, most information is available for T2 and T1ρ mapping. dGEMRIC has also been used in multiple clinical studies, although it requires Gd contrast administration. Sodium imaging and gagCEST are promising technologies but are dependent on high field strength and sophisticated software and hardware. LEVEL OF EVIDENCE 5 J. Magn. Reson. Imaging 2017;45:949-965.
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Affiliation(s)
- Thomas M Link
- Department of Radiology and Biomedical Imaging, University of California at San Francisco, San Francisco, California, USA
| | - Jan Neumann
- Department of Radiology and Biomedical Imaging, University of California at San Francisco, San Francisco, California, USA
| | - Xiaojuan Li
- Department of Radiology and Biomedical Imaging, University of California at San Francisco, San Francisco, California, USA
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Demehri S, Guermazi A, Kwoh CK. Diagnosis and Longitudinal Assessment of Osteoarthritis: Review of Available Imaging Techniques. Rheum Dis Clin North Am 2016; 42:607-620. [PMID: 27742017 DOI: 10.1016/j.rdc.2016.07.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Osteoarthritis (OA) is a major chronic and global health care problem. Recent technological advances in imaging and postprocessing techniques have enhanced the understanding and characterization of the pathophysiology of this chronic and prevalent disease. Although plain radiograph remains the modality of choice for initial assessment of OA, recent studies have shown that advanced cross-sectional imaging can improve the early detection, grading, structural damage quantification, and risk stratification of OA. This article discusses the currently available evidence regarding both the conventional and novel imaging modalities that can be used for evaluation of patients with OA and its longitudinal assessment.
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Affiliation(s)
- Shadpour Demehri
- Division of Musculoskeletal Radiology, Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, School of Medicine, 601 North Caroline Street, JHOC 5165, Baltimore, MD 21287, USA.
| | - Ali Guermazi
- Department of Radiology, Quantitative Imaging Center, Boston University School of Medicine, Boston, MA, USA
| | - C Kent Kwoh
- Division of Rheumatology, University of Arizona Arthritis Center, University of Arizona, Tucson, AZ, USA
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30
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Knee muscle strength correlates with joint cartilage T2 relaxation time in young participants with risk factors for osteoarthritis. Clin Rheumatol 2016; 35:2087-2092. [DOI: 10.1007/s10067-016-3333-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 05/20/2016] [Accepted: 06/16/2016] [Indexed: 12/30/2022]
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31
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A 20 years of progress and future of quantitative magnetic resonance imaging (qMRI) of cartilage and articular tissues—personal perspective. Semin Arthritis Rheum 2016; 45:639-47. [DOI: 10.1016/j.semarthrit.2015.11.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 10/25/2015] [Accepted: 11/11/2015] [Indexed: 12/21/2022]
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32
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Smith AD, Morton AJ, Winter MD, Colahan PT, Ghivizzani S, Brown MP, Hernandez JA, Nickerson DM. MAGNETIC RESONANCE IMAGING SCORING OF AN EXPERIMENTAL MODEL OF POST-TRAUMATIC OSTEOARTHRITIS IN THE EQUINE CARPUS. Vet Radiol Ultrasound 2016; 57:502-14. [PMID: 27198611 DOI: 10.1111/vru.12369] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 02/25/2016] [Accepted: 02/29/2016] [Indexed: 12/17/2022] Open
Abstract
Magnetic resonance imaging (MRI) is the most sensitive imaging modality to detect the early changes of osteoarthritis. Currently, there is no quantifiable method to tract these pathological changes over time in the horse. The objective of this experimental study was to characterize the progression of MRI changes in an equine model of post-traumatic osteoarthritis using a semiquantitative scoring system for whole-organ evaluation of the middle carpal joint. On day 0, an osteochondral fragment was created in one middle carpal joint (OCI) and the contralateral joint (CON) was sham-operated in 10 horses. On day 14, study horses resumed exercise on a high-speed treadmill until the completion of the study (day 98). High-field MRI examinations were performed on days 0 (preosteochondral fragmentation), 14, and 98 and scored by three blinded observers using consensus agreement. Images were scored based on 15 independent articular features, and scores were compared between and within-groups. On days 14 and 98, OCI joints had significantly (P ≤ 0.05) higher whole-organ median scores (29.0 and 31.5, respectively), compared to CON joints (21.5 and 20.0, respectively). On day 14, OCI joints showed significant increases in high-signal bone lesion scores, and osteochondral fragment number and size. On day 98, high-signal bone lesion, low-signal bone lesion, osteophyte formation, cartilage signal abnormality, subchondral bone irregularity, joint effusion, and synovial thickening scores were significantly increased in OCI joints. Study results suggest that the MRI whole-organ scoring system reported here may be used to identify onset and progression of pathological changes following osteochondral injury.
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Affiliation(s)
- Andrew D Smith
- Department of Large Animal Clinical Sciences, University of Florida College of Veterinary Medicine, University of Florida, Gainesville, FL, 32608
| | - Alison J Morton
- Department of Large Animal Clinical Sciences, University of Florida College of Veterinary Medicine, University of Florida, Gainesville, FL, 32608.
| | - Matthew D Winter
- Department of Small Animal Clinical Sciences, University of Florida College of Veterinary Medicine, University of Florida, Gainesville, FL, 32608
| | - Patrick T Colahan
- Department of Large Animal Clinical Sciences, University of Florida College of Veterinary Medicine, University of Florida, Gainesville, FL, 32608
| | - Steve Ghivizzani
- Department of Orthopaedics and Rehabilitation, University of Florida College of Medicine, Univeristy of Florida, Gainesville, FL, 32608
| | - Murray P Brown
- Department of Large Animal Clinical Sciences, University of Florida College of Veterinary Medicine, University of Florida, Gainesville, FL, 32608
| | - Jorge A Hernandez
- Department of Large Animal Clinical Sciences, University of Florida College of Veterinary Medicine, University of Florida, Gainesville, FL, 32608
| | - David M Nickerson
- Department of Statistics, University of Central Florida, Orlando, FL, 32816
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Schreiner MM, Zbýň Š, Schmitt B, Weber M, Domayer S, Windhager R, Trattnig S, Mlynárik V. Reproducibility and regional variations of an improved gagCEST protocol for the in vivo evaluation of knee cartilage at 7 T. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2016; 29:513-21. [PMID: 26965509 DOI: 10.1007/s10334-016-0544-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 02/25/2016] [Accepted: 02/29/2016] [Indexed: 12/31/2022]
Abstract
OBJECTIVE The objective was to establish a gagCEST protocol that would enable robust and reproducible assessment of the glycosaminoglycan (GAG) content in knee cartilage at 7 T within a clinically feasible measurement time. MATERIALS AND METHODS Ten young healthy volunteers (mean age 26 years, range 24-28, five males, five females) were examined on a 7 T MR system. Informed consent was obtained from all individual participants prior to enrollment into the study. Each volunteer was measured twice for reproducibility assessment. The examined knee was immobilized using a custom-made fixation device. For the gagCEST measurement, a prototype segmented 3-D RF-spoiled gradient-echo sequence with an improved saturation scheme employing adiabatic pulses was used in a scan time of 19 min. The asymmetry of the Z-spectra (MTRasym) in selected regions of interest in knee cartilage was calculated. Differences in MTRasym between different regions were evaluated using ANOVA and the Bonferroni corrected post hoc test. RESULTS The improvement of the saturation scheme reduced the influence of field inhomogeneities, resulted in more uniform saturation, and allowed for good reproducibility in a reasonable measurement time (19 min), as demonstrated by an intraclass correlation coefficient of 0.77. Improved fixation helped to reduce motion artifacts. Whereas similar MTRasym values were found for weight-bearing and non-weight-bearing femoral cartilage, lower values were observed in the trochlear groove (p = 0.028), patellar (p = 0.015) and tibial cartilage (p < 0.001) when compared to non-weight-bearing femoral cartilage. CONCLUSION Reasonable reproducibility and sensitivity to regional differences in GAG content suggests that the improved gagCEST protocol might be useful for assessing the biochemical changes in articular cartilage that are associated with early stages of cartilage degeneration.
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Affiliation(s)
- Markus M Schreiner
- Department of Orthopaedic Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.,Department of Biomedical Imaging and Image-Guided Therapy, High Field MR Centre, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Štefan Zbýň
- Department of Biomedical Imaging and Image-Guided Therapy, High Field MR Centre, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Benjamin Schmitt
- Healthcare Sector, Siemens Ltd. Australia, Macquarie Park, NSW, Australia
| | - Michael Weber
- Department of Biomedical Imaging and Image-Guided Therapy, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Stephan Domayer
- Department of Orthopaedic Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Reinhard Windhager
- Department of Orthopaedic Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
| | - Siegfried Trattnig
- Department of Biomedical Imaging and Image-Guided Therapy, High Field MR Centre, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.
| | - Vladimir Mlynárik
- Department of Biomedical Imaging and Image-Guided Therapy, High Field MR Centre, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria
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34
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MacKay JW, Murray PJ, Kasmai B, Johnson G, Donell ST, Toms AP. MRI texture analysis of subchondral bone at the tibial plateau. Eur Radiol 2015; 26:3034-45. [PMID: 26679180 DOI: 10.1007/s00330-015-4142-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 11/23/2015] [Accepted: 11/27/2015] [Indexed: 12/20/2022]
Abstract
OBJECTIVES To determine the feasibility of MRI texture analysis as a method of quantifying subchondral bone architecture in knee osteoarthritis (OA). METHODS Asymptomatic subjects aged 20-30 (group 1, n = 10), symptomatic patients aged 40-50 (group 2, n = 10) and patients scheduled for knee replacement aged 55-85 (group 3, n = 10) underwent high spatial resolution T1-weighted coronal 3T knee MRI. Regions of interest were created in the medial (MT) and lateral (LT) tibial subchondral bone from which 20 texture parameters were calculated. T2 mapping of the tibial cartilage was performed in groups 1 and 2. Mean parameter values were compared between groups using ANOVA. Linear discriminant analysis (LDA) was used to evaluate the ability of texture analysis to classify subjects correctly. RESULTS Significant differences in 18/20 and 12/20 subchondral bone texture parameters were demonstrated between groups at the MT and LT respectively. There was no significant difference in mean MT or LT cartilage T2 values between group 1 and group 2. LDA demonstrated subject classification accuracy of 97 % (95 % CI 91-100 %). CONCLUSION MRI texture analysis of tibial subchondral bone may allow detection of alteration in subchondral bone architecture in OA. This has potential applications in understanding OA pathogenesis and assessing response to treatment. KEY POINTS • Improved techniques to monitor OA disease progression and treatment response are desirable • Subchondral bone (SB) may play significant role in the development of OA • MRI texture analysis is a method of quantifying changes in SB architecture • Pilot study showed that this technique is feasible and reliable • Significant differences in SB texture were demonstrated between individuals with/without OA.
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Affiliation(s)
- James W MacKay
- Radiology Academy, Department of Radiology, Norfolk & Norwich University Hospital, Colney Lane, Norwich, Norfolk, NR4 7UB, UK.
| | - Philip J Murray
- Radiology Academy, Department of Radiology, Norfolk & Norwich University Hospital, Colney Lane, Norwich, Norfolk, NR4 7UB, UK
| | - Bahman Kasmai
- Radiology Academy, Department of Radiology, Norfolk & Norwich University Hospital, Colney Lane, Norwich, Norfolk, NR4 7UB, UK
| | - Glyn Johnson
- Radiology Academy, Department of Radiology, Norfolk & Norwich University Hospital, Colney Lane, Norwich, Norfolk, NR4 7UB, UK.,Norwich Medical School, University of East Anglia, Norwich, UK
| | - Simon T Donell
- Norwich Medical School, University of East Anglia, Norwich, UK.,Department of Trauma & Orthopaedics, Norfolk & Norwich University Hospital, Norwich, UK
| | - Andoni P Toms
- Radiology Academy, Department of Radiology, Norfolk & Norwich University Hospital, Colney Lane, Norwich, Norfolk, NR4 7UB, UK.,Norwich Medical School, University of East Anglia, Norwich, UK
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Wasserstein D, Huston LJ, Nwosu S, Spindler KP. KOOS pain as a marker for significant knee pain two and six years after primary ACL reconstruction: a Multicenter Orthopaedic Outcomes Network (MOON) prospective longitudinal cohort study. Osteoarthritis Cartilage 2015; 23:1674-84. [PMID: 26072385 PMCID: PMC4577458 DOI: 10.1016/j.joca.2015.05.025] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 05/11/2015] [Accepted: 05/26/2015] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The prevalence of radiographic osteoarthritis (OA) after anterior cruciate ligament reconstruction (ACLR) approaches 50%, yet the prevalence of significant knee pain is unknown. We applied three different models of Knee injury and Osteoarthritis Outcome Score (KOOS) thresholds for significant knee pain to an ACLR cohort to identify prevalence and risk factors. DESIGN Multicenter Orthopaedic Outcomes Network (MOON) prospective cohort patients with a unilateral primary ACLR and normal contralateral knee were assessed at 2 and 6 years. Independent variables included patient demographics, validated Patient Reported Outcomes (PRO; Marx activity score, KOOS), and surgical characteristics. Models included: (1) KOOS criteria for a painful knee = quality of life subscale <87.5 and ≥2 of: KOOSpain <86.1, KOOSsymptoms <85.7, KOOSADL <86.8, or KOOSsports/rec <85.0; (2) KOOSpain subscale score ≤72 (≥2 standard deviations below population mean); (3) 10-point KOOSpain drop from 2 to 6 years. Proportional odds models (alpha ≤ 0.05) were used. RESULTS 1761 patients of median age 23 years, median body mass index (BMI) 24.8 kg/m(2) and 56% male met inclusion, with 87% (1530/1761) and 86% (1506/1761) follow-up at 2 and 6 years, respectively. At 6 years, n = 592 (39%), n = 131 (9%) and n = 169 (12%) met criteria for models #1 through #3, respectively. The most consistent and strongest independent risk factor at both time-points was subsequent ipsilateral knee surgery. Low 2-year Marx activity score increased the odds of a painful knee at 6 years. CONCLUSIONS Significant knee pain is prevalent after ACLR; with those who undergo subsequent ipsilateral surgery at greatest risk. The relationship between pain and structural OA warrants further study.
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Affiliation(s)
- D Wasserstein
- Vanderbilt Sports Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - LJ Huston
- Vanderbilt Sports Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - S Nwosu
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN
| | | | - KP Spindler
- Cleveland Clinic Sports Health, Cleveland Clinic, Cleveland, OH
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Guermazi A, Alizai H, Crema MD, Trattnig S, Regatte RR, Roemer FW. Compositional MRI techniques for evaluation of cartilage degeneration in osteoarthritis. Osteoarthritis Cartilage 2015; 23:1639-53. [PMID: 26050864 DOI: 10.1016/j.joca.2015.05.026] [Citation(s) in RCA: 161] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 04/26/2015] [Accepted: 05/25/2015] [Indexed: 02/02/2023]
Abstract
Osteoarthritis (OA), a leading cause of disability, affects 27 million people in the United States and its prevalence is rising along with the rise in obesity. So far, biomechanical or behavioral interventions as well as attempts to develop disease-modifying OA drugs have been unsuccessful. This may be partly due to antiquated imaging outcome measures such as radiography, which are still endorsed by regulatory agencies such as the United States Food and Drug Administration (FDA) for use in clinical trials. Morphological magnetic resonance imaging (MRI) allows unparalleled multi-feature assessment of the OA joint. Furthermore, advanced MRI techniques also enable evaluation of the biochemical or ultrastructural composition of articular cartilage relevant to OA research. These compositional MRI techniques have the potential to supplement clinical MRI sequences in identifying cartilage degeneration at an earlier stage than is possible today using morphologic sequences only. The purpose of this narrative review is to describe compositional MRI techniques for cartilage evaluation, which include T2 mapping, T2* Mapping, T1 rho, dGEMRIC, gagCEST, sodium imaging and diffusion weighted imaging (DWI). We also reviewed relevant clinical studies that have utilized these techniques for the study of OA. The different techniques are complementary. Some focus on isotropy or the collagen network (e.g., T2 mapping) and others are more specific in regard to tissue composition, e.g., gagCEST or dGEMRIC that convey information on the GAG concentration. The application and feasibility of these techniques is also discussed, as they will play an important role in implementation in larger clinical trials and eventually clinical practice.
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Affiliation(s)
- A Guermazi
- Department of Radiology, Boston University School of Medicine, Boston, MA, USA; Department of Research, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.
| | - H Alizai
- Department of Radiology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA; Department of Radiology, New York University Langone Medical Center, New York, NY, USA
| | - M D Crema
- Department of Radiology, Boston University School of Medicine, Boston, MA, USA; Department of Research, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar; Department of Radiology, Hospital do Coração and Teleimagem, São Paulo, Brazil
| | - S Trattnig
- Department of Biomedical Imaging and Image Guided Therapy, Medical University of Vienna, Vienna, Austria
| | - R R Regatte
- Department of Radiology, New York University Langone Medical Center, New York, NY, USA
| | - F W Roemer
- Department of Radiology, Boston University School of Medicine, Boston, MA, USA; Department of Research, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar; Department of Radiology, University of Erlangen, Erlangen, Germany
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Higher Knee Flexion Moment During the Second Half of the Stance Phase of Gait Is Associated With the Progression of Osteoarthritis of the Patellofemoral Joint on Magnetic Resonance Imaging. J Orthop Sports Phys Ther 2015; 45:656-64. [PMID: 26161626 PMCID: PMC4718079 DOI: 10.2519/jospt.2015.5859] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
STUDY DESIGN Controlled laboratory study, longitudinal design. OBJECTIVE To examine whether baseline knee flexion moment or impulse during walking is associated with the progression of osteoarthritis (OA) with magnetic resonance imaging of the patellofemoral joint (PFJ) at 1 year. BACKGROUND Patellofemoral joint OA is highly prevalent and a major source of pain and dysfunction. The biomechanical factors associated with the progression of PFJ OA remain unclear. METHODS Three-dimensional gait analyses were performed at baseline. Magnetic resonance imaging of the knee (high-resolution, 3-D, fast spin-echo sequence) was used to identify PFJ cartilage and bone marrow edema-like lesions at baseline and a 1-year follow-up. The severity of PFJ OA progression was defined using the modified Whole-Organ Magnetic Resonance Imaging Score when new or increased cartilage or bone marrow edema-like lesions were observed at 1 year. Peak external knee flexion moment and flexion moment impulse during the first and second halves of the stance phase of gait were compared between progressors and nonprogressors, and used to predict progression after adjusting for age, sex, body mass index, and presence of baseline PFJ OA. RESULTS Sixty-one participants with no knee OA or isolated PFJ OA were included. Patellofemoral joint OA progressors (n = 10) demonstrated significantly higher peak knee flexion moment (P = .01) and flexion moment impulse (P = .04) during the second half of stance at baseline compared to nonprogressors. Logistic regression showed that higher peak knee flexion moment during the second half of the stance phase was significantly associated with progression at 1 year (adjusted odds ratio = 3.3, P = .01). CONCLUSION Peak knee flexion moment and flexion moment impulse during the second half of stance are related to the progression of PFJ OA and may need to be considered when treating individuals who are at risk of or who have PFJ OA.
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Abstract
Osteoarthritis is a major source of pain, disability, and socioeconomic cost worldwide. The epidemiology of the disorder is complex and multifactorial, with genetic, biological, and biomechanical components. Aetiological factors are also joint specific. Joint replacement is an effective treatment for symptomatic end-stage disease, although functional outcomes can be poor and the lifespan of prostheses is limited. Consequently, the focus is shifting to disease prevention and the treatment of early osteoarthritis. This task is challenging since conventional imaging techniques can detect only quite advanced disease and the relation between pain and structural degeneration is not close. Nevertheless, advances in both imaging and biochemical markers offer potential for diagnosis and as outcome measures for new treatments. Joint-preserving interventions under development include lifestyle modification and pharmaceutical and surgical modalities. Some show potential, but at present few have proven ability to arrest or delay disease progression.
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Affiliation(s)
- S Glyn-Jones
- Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - A J R Palmer
- Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, UK.
| | - R Agricola
- Department of Orthopaedics, Erasmus MC University Medical Centre, Rotterdam, Netherlands
| | - A J Price
- Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - T L Vincent
- Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - H Weinans
- Department of Orthopaedics, University Medical Centre Utrecht, Netherlands
| | - A J Carr
- Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, University of Oxford, Oxford, UK
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Segal NA, Nevitt MC, Lynch JA, Niu J, Torner JC, Guermazi A. Diagnostic performance of 3D standing CT imaging for detection of knee osteoarthritis features. PHYSICIAN SPORTSMED 2015; 43:213-20. [PMID: 26313455 PMCID: PMC4818011 DOI: 10.1080/00913847.2015.1074854] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE To determine the diagnostic performance of standing computerized tomography (SCT) of the knee for osteophytes and subchondral cysts compared with fixed-flexion radiography, using MRI as the reference standard. METHODS Twenty participants were recruited from the Multicenter Osteoarthritis Study. Participants' knees were imaged with SCT while standing in a knee-positioning frame, and with postero-anterior fixed-flexion radiography and 1T MRI. Medial and lateral marginal osteophytes and subchondral cysts were scored on bilateral radiographs and coronal SCT images using the OARSI grading system and on coronal MRI using Whole Organ MRI Scoring. Imaging modalities were read separately with images in random order. Sensitivity, specificity and accuracy for the detection of lesions were calculated and differences between modalities were tested using McNemar's test. RESULTS Participants' mean age was 66.8 years, body mass index was 29.6 kg/m(2) and 50% were women. Of the 160 surfaces (medial and lateral femur and tibia for 40 knees), MRI revealed 84 osteophytes and 10 subchondral cysts. In comparison with osteophytes and subchondral cysts detected by MRI, SCT was significantly more sensitive (93 and 100%; p < 0.004) and accurate (95 and 99%; p < 0.001 for osteophytes) than plain radiographs (sensitivity 60 and 10% and accuracy 79 and 94%, respectively). For osteophytes, differences in sensitivity and accuracy were greatest at the medial femur (p = 0.002). CONCLUSIONS In comparison with MRI, SCT imaging was more sensitive and accurate for detection of osteophytes and subchondral cysts than conventional fixed-flexion radiography. Additional study is warranted to assess diagnostic performance of SCT measures of joint space width, progression of OA features and the patellofemoral joint.
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Affiliation(s)
- Neil A Segal
- Department of Rehabilitation Medicine, The University of Kansas (Kansas City, KS),Department of Radiology, The University of Iowa Carver College of Medicine (Iowa City, IA),Department of Epidemiology, The University of Iowa (Iowa City, IA)
| | - Michael C. Nevitt
- Department of Epidemiology and Biostatistics, University of California, San Francisco (San Francisco, CA)
| | - John A Lynch
- Department of Epidemiology and Biostatistics, University of California, San Francisco (San Francisco, CA)
| | - Jingbo Niu
- Clinical Epidemiology Research & Training Unit, Boston University School of Medicine (Boston, MA)
| | - James C Torner
- Department of Epidemiology, The University of Iowa (Iowa City, IA)
| | - Ali Guermazi
- Department of Radiology, Boston University School of Medicine (Boston, MA)
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Eckstein F, Le Graverand MPH. Plain radiography or magnetic resonance imaging (MRI): Which is better in assessing outcome in clinical trials of disease-modifying osteoarthritis drugs? Summary of a debate held at the World Congress of Osteoarthritis 2014. Semin Arthritis Rheum 2015; 45:251-6. [PMID: 26142321 DOI: 10.1016/j.semarthrit.2015.06.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 04/23/2015] [Accepted: 06/01/2015] [Indexed: 10/23/2022]
Abstract
Osteoarthritis (OA) is the most common disease of synovial joints and currently lacks treatment options that modify structural pathology. Imaging is ideally suited for directly evaluating efficacy of disease-modifying OA drugs (DMOADs) in clinical trials, with plain radiography and MRI being most often applied. The current article is based on a debate held on April 26, 2014, at the World Congress of Osteoarthritis: The authors were invited to contrast strengths and limitations of both methods, highlighting scientific evidence on reliability, construct-validity, and correlations with clinical outcome, and comparing their sensitivity to change in knee OA and sensitivity to DMOAD treatment. The authors concluded that MRI provides more comprehensive information on articular tissues pathology, and that implementation of radiography in clinical trials remains a challenge. However, neither technique has thus far been demonstrated to be strongly superior over the other; for the time being it therefore appears advisable to use both in parallel in clinical trials, to provide more evidence on their relative performance. Radiographic JSW strongly depends on adequate positioning; it is not specific to cartilage loss but also to the meniscus. MRI provides somewhat superior sensitivity to change compared with the commonly used non-fluoroscopic radiographic acquisition protocols, and has recently provided non-location-dependent measures of cartilage thickness loss and gain, which are potentially more sensitive in detecting DMOAD effects than radiographic JSW or region-specific MRI. Non-location-dependent measures of cartilage thickness change should thus be explored further in context of anabolic and anti-catabolic DMOADs.
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Affiliation(s)
- Felix Eckstein
- Institute of Anatomy, Paracelsus Medical University Salzburg & Nuremberg, Strubergasse 21, A5020 Salzburg, Austria; Chondrometrics GmbH, Ainring, Germany.
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Tiku ML, Sabaawy HE. Cartilage regeneration for treatment of osteoarthritis: a paradigm for nonsurgical intervention. Ther Adv Musculoskelet Dis 2015; 7:76-87. [PMID: 26029269 DOI: 10.1177/1759720x15576866] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Osteoarthritis (OA) is associated with articular cartilage abnormalities and affects people of older age: preventative or therapeutic treatment measures for OA and related articular cartilage disorders remain challenging. In this perspective review, we have integrated multiple biological, morphological, developmental, stem cell and homeostasis concepts of articular cartilage to develop a paradigm for cartilage regeneration. OA is conceptually defined as an injury of cartilage that initiates chondrocyte activation, expression of proteases and growth factor release from the matrix. This regenerative process results in the local activation of inflammatory response genes in cartilage without migration of inflammatory cells or angiogenesis. The end results are catabolic and anabolic responses, and it is the balance between these two outcomes that controls remodelling of the matrix and regeneration. A tantalizing clinical clue for cartilage regrowth in OA joints has been observed in surgically created joint distraction. We hypothesize that cartilage growth in these distracted joints may have a biological connection with the size of organs and regeneration. Therefore we propose a novel, practical and nonsurgical intervention to validate the role of distraction in cartilage regeneration in OA. The approach permits normal wake-up activity while during sleep; the index knee is subjected to distraction with a pull traction device. Comparison of follow-up magnetic resonance imaging (MRI) at 3 and 6 months of therapy to those taken before therapy will provide much-needed objective evidence for the use of this mode of therapy for OA. We suggest that the paradigm presented here merits investigation for treatment of OA in knee joints.
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Affiliation(s)
- Moti L Tiku
- Department of Medicine, Robert Wood Johnson Medical School, New Brunswick, NJ 08903-2681, USA
| | - Hatem E Sabaawy
- Rutgers Cancer Institute of New Jersey, Robert Wood Johnson Medical School, New Brunswick, NJ, USA
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Culvenor AG, Collins NJ, Guermazi A, Cook JL, Vicenzino B, Khan KM, Beck N, van Leeuwen J, Crossley KM. Early knee osteoarthritis is evident one year following anterior cruciate ligament reconstruction: a magnetic resonance imaging evaluation. Arthritis Rheumatol 2015; 67:946-55. [PMID: 25692959 DOI: 10.1002/art.39005] [Citation(s) in RCA: 141] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 12/16/2014] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To determine the prevalence and factors associated with knee osteoarthritis (OA) defined by magnetic resonance imaging (MRI) and specific OA features on MRI 1 year after anterior cruciate ligament reconstruction (ACLR). METHODS Isotropic 3.0T MRI scans were obtained for 111 participants (71 men; mean ± SD age 30 ± 8 years) 1 year after ACLR as well as for 20 age-, sex-, and activity level-matched uninjured controls. The MRI OA Knee Score was used to score specific OA features. MRI-defined tibiofemoral and patellofemoral OA was evaluated based on published criteria. Logistic regression identified factors associated with MRI-defined OA and specific OA features after ACLR. RESULTS Following ACLR, medial and lateral tibiofemoral OA on MRI was observed in 7 participants (6%) and 12 participants (11%), respectively, while 19 participants (17%) had patellofemoral OA on MRI. The femoral trochlea was the region most affected by bone marrow lesions (19% of participants), cartilage lesions (31% of participants), and osteophytes (37% of participants). Meniscectomy at the time of ACLR (odds ratio 6.8 [95% confidence interval 2.0-23.3]) and body mass index (BMI) >25 kg/m(2) (odds ratio 3.0 [95% confidence interval 1.3-6.9]) predicted MRI-defined tibiofemoral OA and osteophytes, respectively. Men had higher odds of patellofemoral osteophytes (odds ratio 6.3 [95% confidence interval 2.4-16.2]). No uninjured controls had tibiofemoral or patellofemoral OA on MRI, and specific OA features were uncommon. CONCLUSION OA 1 year following ACLR was more common than previously recognized, while being absent in uninjured control knees. The patellofemoral compartment seems to be at particular risk for early OA after ACLR, especially in men. The association with meniscectomy and BMI demonstrates the construct validity of MRI criteria.
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Affiliation(s)
- Adam G Culvenor
- The University of Queensland, Brisbane, Queensland, Australia
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Teng HL, MacLeod TD, Kumar D, Link TM, Majumdar S, Souza RB. Individuals with isolated patellofemoral joint osteoarthritis exhibit higher mechanical loading at the knee during the second half of the stance phase. Clin Biomech (Bristol, Avon) 2015; 30:383-90. [PMID: 25726158 PMCID: PMC4404202 DOI: 10.1016/j.clinbiomech.2015.02.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 02/10/2015] [Accepted: 02/11/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND Patellofemoral joint osteoarthritis is a highly prevalent disease and an important source of pain and disability. Nonetheless, biomechanical risk factors associated with this disease remain unclear. The purpose of this study was to compare biomechanical factors that are associated with patellofemoral joint loading during walking between individuals with isolated patellofemoral joint osteoarthritis and no osteoarthritis. METHODS MR images of the knee were obtained using a 3D fast-spin echo sequence to identify patellofemoral joint cartilage lesions. Thirty-five subjects with isolated patellofemoral joint osteoarthritis (29 females) and 35 control subjects (21 females) walked at a self-selected speed and as fast as possible. Peak knee flexion moment, flexion moment impulse and peak patellofemoral joint stress during the first and second halves of the stance phase were compared between groups. FINDINGS When compared to the controls, individuals with patellofemoral joint osteoarthritis demonstrated significantly higher peak knee flexion moment (P=.03, Eta(2)=.07), higher knee flexion moment impulse (P=.03, Eta(2)=.07) and higher peak patellofemoral joint stress (P=.01, Eta(2)=.10) during the second half of the stance phase. No significant group difference was observed during the first half of the stance phase. INTERPRETATION Findings of this study suggest that increased mechanical loading (i.e. knee flexion moment, impulse and patellofemoral joint stress) during the second half of the stance phase is associated with patellofemoral joint osteoarthritis. Prevention and rehabilitation programs for patellofemoral joint osteoarthritis may focus on reducing the loading on the patellofemoral joint, specifically during late stance.
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Affiliation(s)
- Hsiang-Ling Teng
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA,Corresponding Author: Hsiang-Ling Teng: Department of Radiology and Biomedical Imaging, University of California San Francisco, 185 Berry Street, Suite 350, San Francisco, CA 94107, USA , Phone: 1- 415-514-8266
| | - Toran D. MacLeod
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA,Department of Physical Therapy, California State University, Sacramento, CA, USA
| | - Deepak Kumar
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA
| | - Thomas M Link
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA
| | - Sharmila Majumdar
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA
| | - Richard B Souza
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA,Department of Physical Therapy and Rehabilitation Science, University of California San Francisco, San Francisco, CA, USA
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Roemer FW, Guermazi A. Osteoarthritis year in review 2014: imaging. Osteoarthritis Cartilage 2014; 22:2003-12. [PMID: 25456295 DOI: 10.1016/j.joca.2014.07.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 07/02/2014] [Accepted: 07/10/2014] [Indexed: 02/02/2023]
Abstract
PURPOSE This narrative review covers original publications related to imaging in osteoarthritis (OA) published in English between April 2013 and March 2014. In vitro data, animal studies and studies with less than 20 observations were not included. METHODS To extract relevant studies, an extensive PubMed database search was performed based on, but not limited to the query terms "Osteoarthritis" in combination with "MRI", "Imaging", "Radiography", "Ultrasound", "Computed Tomography" and "Nuclear Medicine". Publications were sorted according to relevance based on potential impact to the OA research community with the overarching goal of a balanced overview covering all aspects of imaging. Focus was on publications in high impact special interest journals. The literature will be presented in a methodological fashion covering radiography, ultrasound, compositional and morphologic Magnetic resonance imaging (MRI), and from an anatomic perspective including bone, muscle, meniscus and synovitis. RESULTS AND CONCLUSIONS Imaging research in OA in the last year was characterized by a strong focus on MRI-based studies dealing with epidemiological and methodological aspects of the disease. Ultrastructural tissue assessment specifically of cartilage and meniscus using compositional MRI is evolving further. Additional subsets of the large publicly available Osteoarthritis Initiative (OAI) MRI dataset are being analyzed at present and have been published with muscle analyses coming increasingly into the focus of the community. Bone parameters were evaluated using varying technology and a persistent interest in inflammatory disease manifestations has been noted. Other modalities than MRI have been less explored. To date most OA imaging research is still focused on the knee joint.
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Affiliation(s)
- F W Roemer
- Quantitative Imaging Center (QIC), Department of Radiology, Boston University School of Medicine, Boston, MA, USA; Department of Radiology, University of Erlangen-Nuremberg, Erlangen, Germany.
| | - A Guermazi
- Quantitative Imaging Center (QIC), Department of Radiology, Boston University School of Medicine, Boston, MA, USA
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An update on risk factors for cartilage loss in knee osteoarthritis assessed using MRI-based semiquantitative grading methods. Eur Radiol 2014; 25:883-93. [DOI: 10.1007/s00330-014-3464-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 09/20/2014] [Accepted: 10/01/2014] [Indexed: 02/01/2023]
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MRI signal-based quantification of subchondral bone at the tibial plateau: a population study. Skeletal Radiol 2014; 43:1567-75. [PMID: 24986652 DOI: 10.1007/s00256-014-1943-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 05/18/2014] [Accepted: 06/08/2014] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To determine whether differences in subchondral sclerosis at the tibial plateau could be detected with magnetic resonance (MR) imaging in two different age groups. MATERIALS AND METHODS This was a retrospective hypothesis-testing study. Thirty-two knees in group A (25-30 year olds) and 32 knees in group B (45-50 years old) were included. Participants had no MR features of osteoarthritis (OA). On coronal images, tibial articular cartilage thickness was measured, and regions of interest were created in the medial and lateral tibial plateau subchondral bone and in the tibial metaphysis. The measure of heterogeneity at the tibial plateaux was the ratio of the standard deviation of the signal in the medial/lateral compartment to the standard deviation of the signal in the metaphysis (ratio of standard deviations--RSS(medial)/RSS(lateral)). Differences between groups were assessed using unpaired Student's t-tests. RESULTS Mean RSS(medial) was 2.61 (standard deviation, SD = 0.77) in group A and 2.97 (SD = 0.59) in group B. Mean RSS(lateral) in group A was 1.86 (SD = 0.63) and 1.89 (SD = 0.43) in group B. Mean total cartilage thickness (in mm) in group A was 3.38 (SD = 0.90) for the medial and 3.90 (SD = 1.09) for the lateral compartment and 3.44 (SD = 0.74) for the medial and 3.96 (SD = 0.96) for the lateral compartment in group B. The only parameter to show a statistically significant difference between groups was RSS(medial) (p = 0.04). CONCLUSION A difference in medial subchondral bone sclerosis between two age groups was demonstrated in the absence of MR features of OA. This may represent the earliest OA change detectable on MR imaging.
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Imaging of cartilage and bone: promises and pitfalls in clinical trials of osteoarthritis. Osteoarthritis Cartilage 2014; 22:1516-32. [PMID: 25278061 PMCID: PMC4351816 DOI: 10.1016/j.joca.2014.06.023] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 05/22/2014] [Accepted: 06/22/2014] [Indexed: 02/02/2023]
Abstract
Imaging in clinical trials is used to evaluate subject eligibility, and/or efficacy of intervention, supporting decision making in drug development by ascertaining treatment effects on joint structure. This review focusses on imaging of bone and cartilage in clinical trials of (knee) osteoarthritis. We narratively review the full-text literature on imaging of bone and cartilage, adding primary experience in the implementation of imaging methods in clinical trials. Aims and constraints of applying imaging in clinical trials are outlined. The specific uses of semi-quantitative and quantitative imaging biomarkers of bone and cartilage in osteoarthritis trials are summarized, focusing on radiography and magnetic resonance imaging (MRI). Studies having compared both imaging methodologies directly and those having established a relationship between imaging biomarkers and clinical outcomes are highlighted. To make this review of practical use, recommendations are provided as to which imaging protocols are ideal for capturing specific aspects of bone and cartilage tissue, and pitfalls in their usage are highlighted. Further, the longitudinal sensitivity to change, of different imaging methods is reported for various patient strata. From these power calculations can be accomplished, provided the strength of the treatment effect is known. In conclusion, current imaging methodologies provide powerful tools for scoring and measuring morphological and compositional aspects of most articular tissues, capturing longitudinal change with reasonable to excellent sensitivity. When employed properly, imaging has tremendous potential for ascertaining treatment effects on various joint structures, potentially over shorter time scales than required for demonstrating effects on clinical outcomes.
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Fraenkel L, Suter L, Cunningham CE, Hawker G. Understanding preferences for disease-modifying drugs in osteoarthritis. Arthritis Care Res (Hoboken) 2014; 66:1186-92. [PMID: 24470354 DOI: 10.1002/acr.22280] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 01/07/2014] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Numerous disease-modifying drugs for osteoarthritis (DMOADs) are under investigation. However, patients' preferences for drugs to prevent progression of OA are not known. The objective of this study was to quantify patient preferences for potential DMOADs. METHODS We administered a conjoint analysis survey to 304 patients attending outpatient general medicine and specialty clinics. All patients seated in the waiting rooms were asked if they would participate in a survey to elicit opinions about arthritis treatments. We performed simulations to estimate preferences for 4 options to prevent worsening of knee OA: best case (pill, highest benefit, lowest risk, lowest cost), worst case (infusion, lowest benefit, highest risk, highest cost), moderate subcutaneous injection (injection, mid-level benefit, mid-level risk, mid-level cost), and moderate infusion (same as subcutaneous injection except administered by infusion). RESULTS Subjects' median age was 57 years; 55% were women and 76% were white. Segmentation analyses revealed 4 patterns of preferences. A minority (5%) did not want to perform subcutaneous injections and would only consider DMOADs under the best-case scenario. Approximately 20% were risk sensitive and were willing to take DMOADs under the best-case scenario, but would start rejecting these medications as risk increased. A significant number rejected DMOADs under all conditions (16.4%); however, the largest segment (59.2%) had a strong preference for DMOADs across all scenarios. CONCLUSION Our results suggest that a significant percentage of a nonselected outpatient population might be willing to accept at least a moderate degree of risk in order to prevent worsening knee OA.
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Affiliation(s)
- Liana Fraenkel
- Yale University School of Medicine, New Haven, and VA Connecticut Healthcare System, West Haven
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Fang H, Beier F. Mouse models of osteoarthritis: modelling risk factors and assessing outcomes. Nat Rev Rheumatol 2014; 10:413-21. [PMID: 24662645 DOI: 10.1038/nrrheum.2014.46] [Citation(s) in RCA: 137] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Osteoarthritis (OA) is a prevalent musculoskeletal disease that results in pain and low quality of life for patients, as well as enormous medical and socioeconomic burdens. The molecular mechanisms responsible for the initiation and progression of OA are still poorly understood. As such, mouse models of the disease are having increasingly important roles in OA research owing to the advancements of microsurgical techniques and the use of genetically modified mice, as well as the development of novel assessment tools. In this Review, we discuss available mouse models of OA and applicable assessment tools in studies of experimental OA.
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Affiliation(s)
- Hang Fang
- Department of Orthopaedics, The Third Affiliated Hospital of Sun Yat-Sen University, 600 Tianhe Road, Guangzhou, 510630, People's Republic of China
| | - Frank Beier
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, 1151 Richmond Street, London, ON N6A 5C1, Canada
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