Abstract:
OBJECTIVE:The effect of mechanical injury on chondrocyte viability and matrix degradation was studied. It was proposed that mechanical injury to human cartilage explants results in chondrocyte apoptosis with associated loss of glycosaminoglycans. DESIGN:Full thickness human cartilage explants, 5 mm in diameter were subjected to a single static mechanical stress of 14 MPa for 500 ms under radially unconfined compression. Glycosaminoglycan (GAG) release and percentage of cells undergoing apoptosis were measured at 96 h after injury. To establish the time course of apoptosis, explants were subjected to 30% strain and cultured for varying intervals up to 7 days after injury. A group of loaded explants were also treated with the broad spectrum caspase inhibitor z-Vad.fmk after injury. RESULTS:Internucleosomal DNA fragmentation as one indicator of apoptosis was observed in 34% (S.D.+/-11) of chondrocytes at 96 h in response to mechanical loading at 14 MPa, compared to 4% (S.D.+/-2) in the non-loaded explants. Evidence for cell death induction via apoptosis was also obtained by electron microscopy and caspase cleavage of cytokeratin. GAG release was also higher for the loaded explants, mean 1.9% (S.D.+/-0.14) of total GAG content, compared to control explants, mean 0.8% (S.D.+/-0.28). The percentage of apoptotic cells also correlated with the level of GAG release into the culture media. The percentage of apoptotic chondrocytes demonstrated a progressive increase from 6 h to 7 days post-injury. When loaded explants were cultured in z-Vad.fmk after injury, a 50% reduction in apoptosis rates was seen. CONCLUSIONS:These results demonstrate that mechanical injury induces chondrocyte apoptosis and release of GAG from the matrix. The time course suggests that a therapeutic window may exist where apoptosis could be inhibited. This potentially identifies a new approach to chondroprotection.
journal_name
Osteoarthritis Cartilagejournal_title
Osteoarthritis and cartilageauthors
D'Lima DD,Hashimoto S,Chen PC,Colwell CW Jr,Lotz MKdoi
10.1053/joca.2001.0468keywords:
subject
Has Abstractpub_date
2001-11-01 00:00:00pages
712-9issue
8eissn
1063-4584issn
1522-9653pii
S1063-4584(01)90468-6journal_volume
9pub_type
杂志文章abstract::Human articular cartilage cells were cultured in 1.5% agarose in Dulbecco's modified Eagle's medium (DMEM) with 10% fetal calf serum or in serum-free DMEM with 0.15% bovine serum albumin. 35S-aggrecan synthesis in serum-free DMEM was between 20% and 30% of the value observed in DMEM supplemented with 10% fetal calf se...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/s1063-4584(05)80016-0
更新日期:1995-12-01 00:00:00
abstract:OBJECTIVE:To evaluate the efficacy, safety and carry-over effect of diacerein, in comparison to piroxicam, in the treatment of Thai patients with symptomatic knee osteoarthritis (OA). DESIGN:This was a double-blind, randomised, piroxicam-controlled, parallel-group study. A 7-day non-steroidal anti-inflammatory drug wa...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.joca.2007.02.021
更新日期:2007-06-01 00:00:00
abstract:OBJECTIVE:Transforming growth factor-beta (TGF-beta) has profound effects on chondrocyte proliferation and matrix production, and dysregulation of TGF-beta action has been implicated in osteoarthritis. The mechanisms by which the diverse actions of TGF-beta are regulated in chondrocytes are unclear. Although it is well...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2006.10.006
更新日期:2007-04-01 00:00:00
abstract:OBJECTIVE:To determine the within- and between-patient variability in the concentrations of synovial fluid, serum and urine markers of joint tissue metabolism in a cohort of patients with knee pain and cartilage changes consistent with early-stage knee osteoarthritis. DESIGN:Samples of synovial fluid, serum, and urine...
journal_title:Osteoarthritis and cartilage
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1053/joca.1998.0134
更新日期:1998-09-01 00:00:00
abstract:OBJECTIVE:To examine the association between sedentary behavior and blood pressure (BP) among Osteoarthritis Initiative (OAI) participants. DESIGN:We conducted a cross-sectional analysis of the OAI 48-month visit participants whose physical activity was measured using accelerometers. Participants were classified into ...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章,多中心研究
doi:10.1016/j.joca.2014.07.007
更新日期:2014-09-01 00:00:00
abstract:OBJECTIVE:Here we investigate whether monolayer culture or culture at 21% oxygen influences activity of cytochrome c oxidase, the terminal enzyme in the respiratory chain whose activity is essential for oxidative metabolism and whether return to three dimensional (3-D) culture restores cytochrome c oxidase activity to ...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2009.03.001
更新日期:2009-08-01 00:00:00
abstract:OBJECTIVE:To develop flow cytometry for the study of human articular cartilage cell phenotype and to validate the method on chondrocytes cultured in different in-vitro systems. METHODS:Chondrocyte phenotype was modulated by culturing the cells under different in-vitro conditions: i.e. in monolayer and in suspension cu...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1053/joca.2000.0352
更新日期:2001-01-01 00:00:00
abstract:OBJECTIVES:Evaluate the prevalence of meeting the updated 2018 Physical Activity Guidelines for Americans (150 unbouted minutes in moderate-to-vigorous intensity physical activity [MVPA]) and determine cross-sectional factors associated with Guideline attainment in a community-based cohort of adults with or at elevated...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2020.03.007
更新日期:2020-06-01 00:00:00
abstract:OBJECTIVE:An age-related decline in chondrocyte production of osteogenic protein-1 (OP-1) (Bone Morphogenetic Protein-7) may contribute to cartilage loss in osteoarthritis. This study was designed to determine if increased methylation of the OP-1 promoter might serve as a mechanism for the age-related decline in OP-1 e...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2008.08.003
更新日期:2009-04-01 00:00:00
abstract:OBJECTIVES:The aims of this study were to: 1. Evaluate the performance of arthroscopy for the diagnosis of chondropathy and to compare it to that of direct non-arthroscopic assessments; 2. Determine intra-observer reliability of arthroscopic assessments; 3. Evaluate the effects of the arthroscopic video quality and pro...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2004.12.005
更新日期:2005-05-01 00:00:00
abstract:OBJECTIVE:The purpose of this controlled laboratory study was to determine the efficacy of Interleukin-1 Receptor Antagonist Protein (IRAP) treatment as an early intervention strategy by examining the changes in microRNA and mRNA expression in cartilage in an ex-vivo porcine knee joint impact model. METHODS:Custom imp...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2015.05.010
更新日期:2015-11-01 00:00:00
abstract:OBJECTIVE:To characterize the initial events in the cleavage of type II collagen mediated by cathepsin K and demonstrate the presence of the resulting products in human and equine articular osteoarthritic cartilage. DESIGN:Equine type II collagen was digested with cathepsin K and the cleavage products characterized by...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2016.03.016
更新日期:2016-08-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to develop a specific immunoassay for PIIANP and measure its serum concentration in healthy controls and in patients with osteoarthritis (OA) and rheumatoid arthritis (RA). In addition, we investigated circulating forms recognized by antiserum IIA in pools of serum from healthy adult...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2004.02.004
更新日期:2004-06-01 00:00:00
abstract:OBJECTIVE:Disturbances of the proteoglycan metabolism play an essential role in the pathology of osteoarthritis. The extracellular matrix proteoglycan, perlecan, has lately been identified as a cell biological factor in cartilage development and maintenance. We investigated the tissue distribution of perlecan, the rela...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2004.07.004
更新日期:2004-11-01 00:00:00
abstract:OBJECTIVE:To confirm altered perfusion within tibial bone marrow lesions (BMLs) and improve our understanding on the relationship between BMLs and pain in knee osteoarthritis (OA). METHODS:Participants with moderate to severe knee OA were recruited and pain was assessed using the pain subscale of the Western Ontario a...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2012.08.025
更新日期:2012-12-01 00:00:00
abstract:OBJECTIVE:To compare synovial glucosamine levels in normal and inflamed equine joints following oral glucosamine administration and to determine whether single dose administration alters standard synovial parameters of inflammation. METHODS:Eight adult horses were studied. On weeks 1 and 2, all horses received 20mg/kg...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2008.06.018
更新日期:2009-02-01 00:00:00
abstract:OBJECTIVE:Meniscal injuries can lead to mechanical overloading of articular cartilage and eventually to knee osteoarthritis. The objective was to evaluate the potential of contrast enhanced computed tomography (CECT) to image contrast agent (CA) diffusion in human menisci with a clinical cone beam CT scanner. DESIGN:I...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2015.03.037
更新日期:2015-08-01 00:00:00
abstract:OBJECTIVE:In this population-based cohort study, we examined the association between the presence of symptomatic osteoarthritis (OA) and risk for cardiovascular (CV) events. METHOD:A cohort aged ≥55 years recruited from 1996 to 98 was followed through provincial health administrative data to 2014. Demographics, joint ...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2017.07.024
更新日期:2017-11-01 00:00:00
abstract::Radiographic sensitivity for quantifying the rate of change in joint space width (JSW) for DMOAD trials, is influenced by the following, which vary between methodologies for imaging hip, knee and hand. Radio-anatomical plane of measurement JSW measurement precision is improve when the (i) joint is in a normal function...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章,评审
doi:10.1053/joca.1998.0234
更新日期:1999-07-01 00:00:00
abstract:OBJECTIVE:During exercise, cartilage recovers interstitial fluid lost during inactivity, which explains how tissue thickness and joint space are maintained over time. This recovery phenomenon is currently explained by a combination of osmotic swelling during intermittent bath exposure and sub-ambient pressurization dur...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2016.09.018
更新日期:2017-01-01 00:00:00
abstract:OBJECTIVE:Hip labrum pathology has only begun to emerge as a significant source of groin pain in the last decade since the development of hip arthroscopy. Few data are available on the anatomy, histology and function of this structure. Moreover, no metabolic data exist at cellular level. The aim of this study was to ch...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2012.03.023
更新日期:2012-07-01 00:00:00
abstract:OBJECTIVES:Age-related changes in articular cartilage are likely to play a role in the aetiology of osteoarthritis (OA). One of the major age-related changes in cartilage is the accumulation of advanced-glycation-endproducts (AGEs). Since, cartilage tissue is not readily available from patients for studying AGE levels,...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章,多中心研究
doi:10.1016/j.joca.2010.07.006
更新日期:2010-10-01 00:00:00
abstract:OBJECTIVE:To investigate the potential synergistic and differential effects of cytokine combinations on proteoglycan aggregate catabolism in cartilage. METHODS:Bovine articular cartilage explants were maintained in organ culture and subjected to stimulation with cytokine combinations including interleukin-1alpha (IL-1...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2007.05.002
更新日期:2008-01-01 00:00:00
abstract:OBJECTIVE:The aim of the study was to assess the inter-observer reliability and intra-observer reproducibility of the Ahlbäck radiographic classification for knee osteoarthritis (OA). DESIGN:Ninety-six knee radiographs of patients with clinical signs of arthritis were evaluated and classified into five grades of Ahlbä...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/s1063-4584(03)00095-5
更新日期:2003-08-01 00:00:00
abstract:OBJECTIVE:To evaluate the psychometric properties of the French KOOS physical function (KOOS-PS) and HOOS physical function (HOOS-PS), specifically its feasibility, reliability, construct validity, and responsiveness. METHODS:Consecutive outpatients consulting for primary knee or hip osteoarthritis (OA) in a rheumatol...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2009.06.007
更新日期:2009-12-01 00:00:00
abstract:OBJECTIVE:To define for the first time the transcriptomes of normal and end-stage osteoarthritis (OA) hip cartilage. MATERIALS AND METHODS:RNA was isolated from cartilage within 2h of joint replacement surgery. Gene expression was analyzed using Agilent GeneSpring GX 11 following hybridization to Illumina Human HT-12 ...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/j.joca.2012.05.006
更新日期:2012-09-01 00:00:00
abstract:OBJECTIVES:Low-dose radiation therapy (LDRT) is widely used as treatment for osteoarthritis (OA) in some countries, while relatively unknown in others. Systematic literature review displayed a lack of high-level evidence for beneficial effects in clinical practice. The aim was to assess the efficacy of LDRT on symptoms...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.joca.2018.06.010
更新日期:2018-10-01 00:00:00
abstract::The articular tissue generated on carbon fiber rods in rabbit knee joints after 75 days of intermittent active motion was compared with tissue generated on carbon fiber rods whose articular surfaces were covered with a free reversed periosteal graft. Both methods were effective in generating articular tissue; however,...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章
doi:10.1016/s1063-4584(05)80077-9
更新日期:1994-12-01 00:00:00
abstract:OBJECTIVE:To date semiquantitative whole-organ scoring of knee osteoarthritis (OA) relies on 1.5 Tesla (T) Magnetic resonance imaging (MRI) systems. Less costly 1.0 T extremity systems have been introduced that offer superior patient comfort, but may have limitations concerning field-of-view and image quality. The aim ...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章,多中心研究
doi:10.1016/j.joca.2009.08.017
更新日期:2010-02-01 00:00:00
abstract:OBJECTIVE:To determine if behavioral graded activity (BGA) results in better long-term effectiveness (5 years after inclusion) than usual exercise therapy (UC; usual care) in patients with osteoarthritis (OA) of the hip or knee. METHOD:Long-term follow-up study of a single blind cluster randomized trial comparing BGA ...
journal_title:Osteoarthritis and cartilage
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.joca.2010.05.008
更新日期:2010-08-01 00:00:00