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https://www.readbyqxmd.com/read/29150953/new-algorithm-for-simulation-of-proteoglycan-loss-and-collagen-degeneration-in-the-knee-joint-data-from-the-osteoarthritis-initiative
#1
Mika E Mononen, Petri Tanska, Hanna Isaksson, Rami K Korhonen
Osteoarthritis is a harmful joint disease but prediction of disease progression is problematic. Currently, there is only one modeling framework which can be applied to predict the progression of knee osteoarthritis but it only considers degenerative changes in the collagen fibril network. Here, we have developed the framework further by considering all of the major tissue changes (proteoglycan content, fluid flow and collagen fibril network) occurring in osteoarthritis. While excessive levels of tissue stresses controlled degeneration of the collagen fibril network, excessive levels of tissue strains controlled the decrease in proteoglycan content and the increase in permeability...
November 18, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29146943/cryopreservation-of-human-mesenchymal-stem-cells-in-an-allogeneic-bioscaffold-based-on-platelet-rich-plasma-and-synovial-fluid
#2
Haritz Gurruchaga, Laura Saenz Del Burgo, Ane Garate, Diego Delgado, Pello Sanchez, Gorka Orive, Jesús Ciriza, Mikel Sanchez, Jose Luis Pedraz
Transplantation of mesenchymal stem cells (MSCs) has emerged as an alternative strategy to treat knee osteoarthritis. In this context, MSCs derived from synovial fluid could provide higher chondrogenic and cartilage regeneration, presenting synovial fluid as an appropriate MSCs source. An allogeneic and biomimetic bioscaffold composed of Platelet Rich Plasma and synovial fluid that preserve and mimics the natural environment of MSCs isolated from knee has also been developed. We have optimized the cryopreservation of knee-isolated MSCs embedded within the aforementioned biomimetic scaffold, in order to create a reserve of young autologous embedded knee MSCs for future clinical applications...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29145839/structural-effects-of-intra-articular-tgf-%C3%AE-1-in-moderate-to-advanced-knee-osteoarthritis-mri-based-assessment-in-a-randomized-controlled-trial
#3
A Guermazi, G Kalsi, J Niu, M D Crema, R O Copeland, A Orlando, M J Noh, F W Roemer
BACKGROUND: To determine effects of allogeneic human chondrocytes expressing TGF-β1 (TG-C) on structural progression of MRI features of knee osteoarthritis over a 1 year period. METHODS: This phase II randomized controlled trial of TG-C included patients with moderate to advanced osteoarthritis. Patients were randomized to receive an intraarticular 3:1 mixture of non-transduced allogeneic human chondrocytes and TG-C or placebo. 3 T MRI was acquired for all patients at baseline and follow-up (3, 6 and 12 months)...
November 16, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29143404/tool-for-osteoarthritis-risk-prediction-toarp-over-8-years-using-baseline-clinical-data-x-ray-and-mri-data-from-the-osteoarthritis-initiative
#4
Gabby B Joseph, Charles E McCulloch, Michael C Nevitt, Jan Neumann, Alexandra S Gersing, Martin Kretzschmar, Benedikt J Schwaiger, John A Lynch, Ursula Heilmeier, Nancy E Lane, Thomas M Link
BACKGROUND: Osteoarthritis (OA), a multifactorial disease causing joint degeneration, often leads to severe disability. The rising rates of disability highlight the need for implementing preventative measures at early stages of the disease, which would especially benefit subjects at high risk for OA development. PURPOSE: To develop a risk prediction tool for moderate-severe OA (TOARP) over 8 years based on subject characteristics, knee radiographs, and MRI data at baseline using data from the Osteoarthritis Initiative (OAI)...
November 16, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29141683/pellet-coculture-of-osteoarthritic-chondrocytes-and-infrapatellar-fat-pad-derived-mesenchymal-stem-cells-with-chitosan-hyaluronic-acid-nanoparticles-promotes-chondrogenic-differentiation
#5
Shu Huang, Xiongbo Song, Tao Li, Jingfang Xiao, Yemiao Chen, Xiaoyuan Gong, Weinan Zeng, Liu Yang, Cheng Chen
BACKGROUND: Cell source plays a key role in cell-based cartilage repair and regeneration. Recent efforts in cell coculture have attempted to combine the advantages and negate the drawbacks of the constituent cell types. The aim of this study was to evaluate the chondrogenic outcome of articular chondrocytes (ACs) and infrapatellar fat pad (IPFP)-derived mesenchymal stem cells (MSCs) in direct coculture. METHODS: ACs and IPFP MSCs from the same patients with knee osteoarthritis (OA) were cocultured in monolayer and in pellets...
November 15, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29141674/repair-of-articular-cartilage-and-subchondral-defects-in-rabbit-knee-joints-with-a-polyvinyl-alcohol-nano-hydroxyapatite-polyamide-66-biological-composite-material
#6
Tao Guo, Xiaobin Tian, Bo Li, Tianfu Yang, Yubao Li
BACKGROUND: This study sought to prepare a new PVA/n-HA/PA66 composite to investigate the repair of articular cartilage and subchondral defects in rabbit knee joints. METHODS: A 5 × 5 × 5 mm-sized defect was created in the patellofemoral joints of 72 healthy adult New Zealand rabbits. The rabbits were then randomly divided into three groups (n = 24): PVA/n-HA+PA66 group, polyvinyl alcohol (PVA) group, and control (untreated) group. Cylindrical PVA/n-HA+PA66, 5 × 5 mm, comprised an upper PVA layer and a lower n-HA+PA66 layer...
November 15, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29138892/-partial-and-complete-joint-transplantation-with-fresh-osteochondral-allografts-the-flocsat-concept
#7
REVIEW
C Krettek, J-D Clausen, N Bruns, C Neunaber
Cartilage defects in adult patients do not heal well. Fresh osteochondral allograft (OCA) transplantation is based on mature, living, mechanically sound hyaline cartilage attached to a bone interface, which is brought into an osteochondral defect, where it becomes osseointegrated. According to current knowledge, intact hyaline cartilage tissue is immune privileged and does not, in contrast to bone, meniscus or ligaments, cause an immune reaction. The technique has the unique advantage of transplanting viable, mature and mechanically stable hyaline cartilage into the affected area...
November 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/29137624/compression-rate-dependent-nonlinear-mechanics-of-normal-and-impaired-porcine-knee-joints
#8
Marcel Leonardo Rodriguez, LePing Li
BACKGROUND: The knee joint performs mechanical functions with various loading and unloading processes. Past studies have focused on the kinematics and elastic response of the joint with less understanding of the rate-dependent load response associated with viscoelastic and poromechanical behaviors. METHODS: Forty-five fresh porcine knee joints were used in the present study to determine the loading-rate-dependent force-compression relationship, creep and relaxation of normal, dehydrated and meniscectomized joints...
November 14, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29137610/hemoglobin-stimulates-the-expression-of-adamts-5-and-adamts-9-by-synovial-cells-a-possible-cause-of-articular-cartilage-damage-after-intra-articular-hemorrhage
#9
Takuya Tajima, Tomohisa Sekimoto, Nami Yamaguchi, Noboru Taniguchi, Syuji Kurogi, Masugi Maruyama, Etsuo Chosa
BACKGROUND: ADAMTS (a disintegrin and metalloprotease with thrombospondin motifs) proteins play an important pathological role in matrix degeneration. Aggrecan degradation is a significant and critical event in early-stage osteoarthritis. To determine the effect of hemoglobin (Hb) on the ability of synovial tissues to produce ADAMTS family members, we examined the influence of Hb by synovial cells in an in vitro experimental system. METHODS: Synovial tissues were obtained from five young patients with meniscal injury under arthroscopic surgery...
November 14, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29136765/panax-quinquefolium-saponin-inhibits-endoplasmic-reticulum-stress-induced-apoptosis-and-the-associated-inflammatory-response-in-chondrocytes-and-attenuates-the-progression-of-osteoarthritis-in-rat
#10
Jun-Jun Xie, Jian Chen, Shi-Kun Guo, Yun-Tao Gu, Ying-Zhao Yan, Wei-Jun Guo, Cheng-Lun Yao, Meng-Yun Jin, Cheng-Long Xie, Xiang Wang, Xiang-Yang Wang, Long Chen
Treatments for osteoarthritis (OA) seek to restore chondrocyte function and inhibit cell apoptosis. Panax quinquefolium saponin (PQS) is the major active ingredient of Radix panacis quinquefolii (American ginseng), and has been demonstrated to exert anti-inflammatory and anti-apoptotic effects in various diseases. However, any potential effect of PQS on the pathological process of OA remains unclear. This work aimed to explore the role of PQS in chondrocytes and to clarify its potential mechanisms. We showed that PQS treatment could protect chondrocytes against endoplasmic reticulum (ER) stress and associated apoptosis induced by interleukin (IL)-1β...
November 6, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29136015/the-influences-of-walking-running-and-stair-activity-on-knee-articular-cartilage-quantitative-mri-using-t1-rho-and-t2-mapping
#11
Meng Chen, Lin Qiu, Si Shen, Fei Wang, Jing Zhang, Cici Zhang, Sirun Liu
OBJECTIVE: To explore the different influences of walking, running and stair activity on knee articular cartilage with T1 rho and T2 mapping sequences. MATERIALS AND METHODS: MRI (3.0-T) scans of the right knee were performed in twenty-three young healthy adults immediately after 30 minutes of rest, walking, running and stair activity respectively. Articular cartilage was quantitatively assessed based on T1 rho and T2 relaxation times. Analysis of variance for random block design data, bonferroni test and paired samples t tests were performed to estimate the different influences of physiological activities on articular cartilage...
2017: PloS One
https://www.readbyqxmd.com/read/29134405/cell-type-specific-gene-expression-patterns-in-the-knee-cartilage-in-an-osteoarthritis-rat-model
#12
Michal Korostynski, Natalia Malek, Marcin Piechota, Katarzyna Starowicz
Osteoarthritis (OA) is a chronic degenerative disease that leads to joint failure, pain, and disability. Gene regulation is implicated as a driver of the imbalance between the expression of catabolic and anabolic factors that eventually leads to the degeneration of osteoarthritic cartilage. In our model, knee-joint OA was induced in male Wistar rats by intra-articular sodium monoiodoacetate (MIA) injections. Whole-genome microarrays were used to analyse the alterations in gene expression during the time-course of OA development (at 2, 14, and 28 days post-injection) in rat knee joints...
November 13, 2017: Functional & Integrative Genomics
https://www.readbyqxmd.com/read/29134251/meniscal-repair-results-in-inferior-short-term-outcomes-compared-with-meniscal-resection-a-cohort-study-of-6398-patients-with-primary-anterior-cruciate-ligament-reconstruction
#13
Eleonor Svantesson, Riccardo Cristiani, Eric Hamrin Senorski, Magnus Forssblad, Kristian Samuelsson, Anders Stålman
PURPOSE: To compare patient reported outcome measures (PROMs) during the first postoperative year between isolated anterior cruciate ligament (ACL) reconstruction and ACL reconstruction with concomitant meniscal intervention. METHODS: Patients who underwent primary ACL reconstruction at Capio Artro Clinic, Stockholm, Sweden, between 1st Jan 2001 and 31st Dec 2014 without concomitant injuries others than meniscal and/or cartilage lesions were included. Five groups of meniscal treatment simultaneously to ACL reconstruction were established; medial meniscal (MM) resection, MM repair, lateral meniscal (LM) resection, LM repair, and MM + LM resection...
November 13, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29134132/abnormal-subchondral-bone-remodeling-and-its-association-with-articular-cartilage-degradation-in-knees-of-type-2-diabetes-patients
#14
Yan Chen, Yong-Can Huang, Chun Hoi Yan, Kwong Yuen Chiu, Qingjun Wei, Jingmin Zhao, X Edward Guo, Frankie Leung, William W Lu
Type 2 diabetes (T2D) is associated with systemic abnormal bone remodeling and bone loss. Meanwhile, abnormal subchondral bone remodeling induces cartilage degradation, resulting in osteoarthritis (OA). Accordingly, we investigated alterations in subchondral bone remodeling, microstructure and strength in knees from T2D patients and their association with cartilage degradation. Tibial plateaus were collected from knee OA patients undergoing total knee arthroplasty and divided into non-diabetic (n=70) and diabetes (n=51) groups...
2017: Bone Research
https://www.readbyqxmd.com/read/29132902/histopathological-assessment-of-primary-osteoarthritic-knees-in-large-patient-cohort-reveal-the-possibility-of-several-potential-patterns-of-osteoarthritis-initiation
#15
V P Mantripragada, N S Piuzzi, T Zachos, N A Obuchowski, G F Muschler, R J Midura
OBJECTIVE: The two main objectives of the study include (1) Test the hypothesis that the lateral femoral condyle (LFC) in patients with primary OA and varus knees undergoing total knee arthroplasty (TKA) can be used as a model to better characterize varying histological features of human OA, (2) Correlate characteristic OA features using the established histopathological scoring systems (HHGS and OARSI) to understand potential histopathological patterns of OA initiation. DESIGN: Two osteochondral specimens (4×4×8mm) were collected from fifty patient's LFC at the time of TKA (total 100 specimens), who presented preserved lateral knee compartment with joint space width>2mm...
November 10, 2017: Current Research in Translational Medicine
https://www.readbyqxmd.com/read/29129999/expression-of-genes-and-their-polymorphism-influences-the-risk-of-knee-osteoarthritis
#16
Abhishek Mishra, Rajeshwar Nath Srivastava, Sachin Awasthi, Devendra Parmar, Priya Mishra
Introduction: Genetic factors including the level of expression of the fingerprint of genes involved in the development of bones and cartilage such as GDF-5 or ESR-α or CALM-1 are known to be strong determinants of the osteoarthritis (OA) in Caucasian and Oriental populations. Because of high prevalence of OA in Indian population and availability of limited genetic data, we determined whether similar genetic factors are involved in Indians as well. Methods: A case control study was carried out involving 500 patients of knee OA and equal number of healthy controls...
2017: Journal of Nucleic Acids
https://www.readbyqxmd.com/read/29129649/tsg-6-a-double-edged-sword-for-osteoarthritis
#17
Ching-Heng Chou, David E Attarian, Hans-Georg Wisniewski, Philip A Band, Virginia B Kraus
PURPOSE: To explore mechanisms underlying the association of TSG-6 with osteoarthritis (OA) progression. METHODS: TSG-6-mediated heavy chain (HC) transfer (TSG-6 activity) and its association with inflammatory mediators were quantified in knee OA (n=25) synovial fluids. Paired intact and damaged cartilages from the same individuals (20 tibial and 12 meniscal) were analyzed by qRT-PCR and immunohistochemistry (IHC) for gene and protein expression of TSG-6 and components of IαI (necessary for TSG-6 activity), and for TSG-6 activity +/- spiked in IαI...
November 9, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29128878/microfracture-is-more-cost-effective-than-autologous-chondrocyte-implantation-a-review-of-level-1-and-level-2-studies-with-5%C3%A2-year-follow-up
#18
Tommy Frøseth Aae, Per-Henrik Randsborg, Hilde Lurås, Asbjørn Årøen, Øystein Bjerkestrand Lian
PURPOSE: Focal cartilage defects in the knee may have devastating effect on the knee joint, where two of the main surgical treatment options are microfracture and autologous chondrocyte implantation. Comparative studies have failed to establish which method yields the best clinical results. A cost-effectiveness analysis of microfracture and autologous chondrocyte implantation would contribute to the clinical decision process. METHODS: A PubMed search identifying level I and level II studies with 5 year follow-up was performed...
November 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29128875/allowing-one-quadrant-of-patellar-lateral-translation-during-medial-patellofemoral-ligament-reconstruction-successfully-limits-maltracking-without-overconstraining-the-patella
#19
John J Elias, Kerwyn C Jones, Molly K Lalonde, Joseph N Gabra, S Cyrus Rezvanifar, Andrew J Cosgarea
PURPOSE: Graft tensioning during medial patellofemoral ligament (MPFL) reconstruction typically allows for lateral patellar translation within the trochlear groove. Computational simulation was performed to relate the allowed patellar translation to patellofemoral kinematics and contact pressures. METHODS: Multibody dynamic simulation models were developed to represent nine knees with patellar instability. Dual limb squatting was simulated representing the pre-operative condition and simulated MPFL reconstruction...
November 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29128508/relative-and-absolute-test-retest-reliabilities-of-biomechanical-risk-factors-for-knee-osteoarthritis-progression-benchmarks-for-meaningful-change
#20
Nicholas M Brisson, Paul W Stratford, Monica R Maly
OBJECTIVE: Biomechanical factors are important treatment targets in knee osteoarthritis. The knee adduction (KAM) and flexion (KFM) moments, quadriceps strength and power, load frequency, and body mass index (BMI) all have the potential to affect knee articular cartilage integrity by modulating forces across the joint. To identify clinically meaningful change, however, these measurements must be reliable and sensitive to change. This study estimated relative and absolute test-retest reliabilities over long periods of biomechanical risk factors for knee osteoarthritis progression...
November 8, 2017: Osteoarthritis and Cartilage
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