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https://www.readbyqxmd.com/read/29166409/post-weaning-high-fat-diet-results-in-growth-cartilage-lesions-in-young-male-rats
#1
Samuel S Haysom, Mark H Vickers, Lennex H Yu, Clare M Reynolds, Elwyn C Firth, Sue R McGlashan
To determine if a high-fat diet (HF) from weaning would result in a pro-inflammatory state and affect joint cartilage, we fed male rats either HF or Chow diet post-weaning, and voluntary wheel exercise (EX) or cage only activity (SED) after 9 weeks of age. At 17 weeks body composition, plasma biomarkers and histomorphology scores of femoro-tibial cartilages of HF-SED, HF-EX, Chow-SED and Chow-EX groups were compared. Food intake and activity were not significantly different between groups. HF diet resulted in significantly higher weight gain, %fat, fat:lean ratio, and plasma leptin, insulin and TNFα concentrations, with significant interactions between diet and exercise...
2017: PloS One
https://www.readbyqxmd.com/read/29165016/the-use-of-osteochondral-flaps-in-the-treatment-of-carpal-disorders
#2
James P Higgins, Heinz K Bürger
Vascularized osteochondral flaps have been described for use in reconstruction of the wrist, providing the benefits of osteochondral grafts in addition to the benefit of osseous and subchondral perfusion via the microvascular pedicle. Various harvest sites have been described including the medial and lateral femoral trochlea and the proximal third metatarsal. The reconstructed surfaces described include the cartilage surfaces of the scaphoid, lunate, capitate and radius. The ability to transfer analogous osteochondral surfaces poses the possibility for new motion-preserving alternatives for difficult articular problems previously treated with salvage procedures...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/29164651/jaw-closing-movement-and-sex-differences-in-temporomandibular-joint-energy-densities
#3
Luigi M Gallo, Nicolas Fankhauser, Yoly M Gonzalez, Hongzeng Liu, Ying Liu, Jeffrey C Nickel, Laura R Iwasaki
Energy densities (ED, mJ/mm(3) ) quantify mechanical work imposed on articular cartilages during function. This cross-sectional study examined differences in temporomandibular joint (TMJ) ED during asymmetric versus symmetric jaw closing in healthy females versus males. ED component variables were tested for differences between and within sexes for two types of jaw closing. Seventeen female and 17 male subjects gave informed consent to participate. Diagnostic Criteria for Temporomandibular Disorders and images (magnetic resonance (MR), computed tomography) were used to confirm healthy TMJ status...
November 21, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/29164531/biphasic-bioresorbable-scaffold-trufit-%C3%A2-in-knee-osteochondral-defects-3-t-mri-evaluation-of-osteointegration-in-patients-with-a-5-year-minimum-follow-up
#4
G Bugelli, F Ascione, G Dell'Osso, V Zampa, S Giannotti
PURPOSE: The aim of this study is to follow morphological imaging characteristics and osteointegration of TruFit(®) bone graft substitute (BGS) plugs in cases of chondral and osteochondral defects of the articular surface of the knee joint, using high-quality cartilage-sensitive 3-T magnetic resonance imaging (MRI), linked to clinical outcomes. METHODS: The MRI was used to assess osteointegration and biological evolution of the TruFit(®) BGS plugs in cases with minimum 5-year follow-up: The TruFit(®) plug was used in 46 patients for a total of 47 cases with mean age of 57...
November 21, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/29163675/effects-of-different-concentrations-of-type-i-collagen-hydrogel-on-the-growth-and-differentiation-of-chondrocytes
#5
Deshan Hu, Xiuli Shan
The objective of this study was to analyze the effects of type-I collagen hydrogel of different concentrations on the growth and differentiation of rabbit chondrocytes. Articular cartilage from New Zealand white rabbits was harvested and cultured. Second-generation chondrocytes were collected for in vitro culture with 10, 7, and 5 mg/ml type-I collagen hydrogel, respectively (denoted as groups A, B, and C). After in vitro culture for 1 day, chondrocytes were stained with fluorescein diacetate (FDA)/propidium iodide (PI), and cell viability was observed by laser confocal microscopy...
December 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29163532/biodistribution-and-immunogenicity-of-allogeneic-mesenchymal-stem-cells-in-a-rat-model-of-intraarticular-chondrocyte-xenotransplantation
#6
Maribel Marquina, Javier A Collado, Magdiel Pérez-Cruz, Pablo Fernández-Pernas, Juan Fafián-Labora, Francisco J Blanco, Rafael Máñez, María C Arufe, Cristina Costa
Xenogeneic chondrocytes and allogeneic mesenchymal stem cells (MSC) are considered a potential source of cells for articular cartilage repair. We here assessed the immune response triggered by xenogeneic chondrocytes when injected intraarticularly, as well as the immunoregulatory effect of allogeneic bone marrow-derived MSC after systemic administration. To this end, a discordant xenotransplantation model was established by injecting three million porcine articular chondrocytes (PAC) into the femorotibial joint of Lewis rats and monitoring the immune response...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29162079/examination-of-concomitant-glenohumeral-pathologies-in-patients-treated-arthroscopically-for-calcific-tendinitis-of-the-shoulder-and-implications-for-routine-diagnostic-joint-exploration
#7
Gernot Lang, Kaywan Izadpanah, Eva Johanna Kubosch, Dirk Maier, Norbert Südkamp, Peter Ogon
BACKGROUND: Glenohumeral exploration is routinely performed during arthroscopic removal of rotator cuff calcifications in patients with calcific tendinitis of the shoulder (CTS). However, evidence on the prevalence of intraarticular co-pathologies is lacking and the benefit of glenohumeral exploration remains elusive. The aim of the present study was to assess and quantify intraoperative pathologies during arthroscopic removal of rotator cuff calcifications in order to determine whether standardized diagnostic glenohumeral exploration appears justified in CTS patients...
November 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29161138/autologous-matrix-induced-chondrogenesis-a-systematic-review-of-the-clinical-evidence
#8
Liang Gao, Patrick Orth, Magali Cucchiarini, Henning Madry
BACKGROUND: The addition of a type I/III collagen membrane in cartilage defects treated with microfracture has been advocated for cartilage repair, termed "autologous matrix-induced chondrogenesis" (AMIC). PURPOSE: To examine the current clinical evidence regarding AMIC for focal chondral defects. STUDY DESIGN: Systematic review. METHODS: A systematic review was performed by searching PubMed, ScienceDirect, and Cochrane Library databases...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29160173/gene-delivery-to-joints-by-intra-articular-injection
#9
Christopher H Evans, Steven Craig Ghivizzani, Paul D Robbins
Most forms of arthritis are incurable, difficult to treat and a major cause of disability in western countries. Better local treatment of arthritis is impaired by the pharmacokinetics of the joint that make it very difficult to deliver drugs to joints at sustained, therapeutic concentrations. This is especially true of biologic drugs, such as proteins and RNA, many of which show great promise in pre-clinical studies. Gene transfer provides a strategy for overcoming this limitation. The basic concept is to deliver cDNAs encoding therapeutic products by direct intra-articular injection, leading to sustained, endogenous synthesis of the gene products within the joint...
November 21, 2017: Human Gene Therapy
https://www.readbyqxmd.com/read/29158995/the-role-of-biomaterials-in-the-treatment-of-meniscal-tears
#10
Crystal O Kean, Robert J Brown, James Chapman
Extensive investigations over the recent decades have established the anatomical, biomechanical and functional importance of the meniscus in the knee joint. As a functioning part of the joint, it serves to prevent the deterioration of articular cartilage and subsequent osteoarthritis. To this end, meniscus repair and regeneration is of particular interest from the biomaterial, bioengineering and orthopaedic research community. Even though meniscal research is previously of a considerable volume, the research community with evolving material science, biology and medical advances are all pushing toward emerging novel solutions and approaches to the successful treatment of meniscal difficulties...
2017: PeerJ
https://www.readbyqxmd.com/read/29158053/transforming-growth-factor-beta1-promotes-articular-cartilage-repair-through-canonical-smad-and-hippo-pathways-in-bone-mesenchymal-stem-cells
#11
Jun Ying, Pinger Wang, Shanxing Zhang, Taotao Xu, Lei Zhang, Rui Dong, Shibing Xu, Peijian Tong, Chengliang Wu, Hongting Jin
AIMS: Transforming growth factor-β1 (TGF-β1) is a chondrogenic factor and has been reported to be able to enhance chondrocyte differentiation from bone marrow mesenchymal stem cells (BMSCs). Here we investigate the molecular mechanism through which TGF-β1 chronically promotes the repair of cartilage defect and inhibit chondrocyte hypertrophy. MAIN METHODS: Animal models of full thickness cartilage defects were divided into three groups: model group, BMSCs group (treated with BMSCs/calcium alginate gel) and BMSCs+TGF-β1 group (treated with Lentivirus-TGF-β1-EGFP transduced BMSCs/calcium alginate gel)...
November 17, 2017: Life Sciences
https://www.readbyqxmd.com/read/29157984/ropivacaine-relieves-pain-and-prevents-chondrocyte-degradation-probably-through-calcineurin-nfat1-signaling-pathway-in-osteoarthritis-rats
#12
Wenyu Yao, Qian Han, Lei Wang, Zhiqiang Niu
Calcineurin/NFAT1 signaling pathway plays critical roles in maintaining the homeostasis of articular chondrocytes and in regulating the pathogenesis of osteoarthritis (OA). A few studies demonstrate therapeutic values of ropivacaine (Rop) in OA, but the underlying mechanisms have not been defined. Here, we determined whether Calcineurin/NFAT1 signaling pathway mediates the benefits of Rop to OA. OA rat models were established by a single intra-articular injection of monosodium iodoacetate. The pathophysiology of OA was evaluated by measuring hyperalgesia behavior and the expression of NFAT1, calcineurin, catabolic enzymes in chondrocytes, and chondrogenic markers in affected articular cartilage and primary chondrocyte cultures treated with IL-1β...
November 17, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29156980/platelet-rich-plasma-and-hyaluronic-acid-are-not-synergistic-when-used-as-biological-adjuncts-with-autologous-osteochondral-transplantation
#13
Niall A Smyth, Keir A Ross, Amgad M Haleem, Charles P Hannon, Christopher D Murawski, Huong T Do, John G Kennedy
INTRODUCTION: Autologous osteochondral transplantation (AOT) is a treatment for osteochondral lesions with known concerns, including histological degradation of the graft and poor cartilage integration. Platelet-rich plasma (PRP) and hyaluronic acid (HA) have been described has having the potential to improve results. The aim of this study was to evaluate the effect of PRP and HA on AOT in a rabbit model. METHODS: Thirty-six rabbits underwent bilateral knee AOT treated with either the biological adjunct (PRP, n = 12; HA, n = 12; PRP + HA, n = 12) or saline (control)...
January 1, 2017: Cartilage
https://www.readbyqxmd.com/read/29156946/chondroprotection-in-models-of-cartilage-injury-by-raising-the-temperature-and-osmolarity-of-irrigation-solutions
#14
Noha M Eltawil, Saima Ahmed, Luke H Chan, A Hamish R W Simpson, Andrew C Hall
Objectives During arthroscopic or open joint surgery, articular cartilage may be subjected to mechanical insults by accident or design. These may lead to chondrocyte death, cartilage breakdown and posttraumatic osteoarthritis. We have shown that increasing osmolarity of routinely used normal saline protected chondrocytes against injuries that may occur during orthopedic surgery. Often several liters of irrigation fluid are used during an orthopedic procedure, which is usually kept at room temperature, but is sometimes chilled...
January 1, 2017: Cartilage
https://www.readbyqxmd.com/read/29156944/%C3%AE-lipoic-acid-potentiates-the-anti-inflammatory-activity-of-avocado-soybean-unsaponifiables-in-chondrocyte-cultures
#15
Carmelita G Frondoza, Lowella V Fortuno, Mark W Grzanna, Stacy L Ownby, Angela Y Au, Ann M Rashmir-Raven
Objective Pro-inflammatory mediators such as prostaglandin E-2 (PGE2) play major roles in the pathogenesis of osteoarthritis (OA). Although current pharmacologic treatments reduce inflammation, their prolonged use is associated with deleterious side effects prompting the search for safer and effective alternative strategies. The present study evaluated whether chondrocyte production of PGE2 can be suppressed by the combination of avocado/soybean unsaponifiables (ASU) and α-lipoic acid (LA). Design Chondrocytes from articular cartilage of equine joints were incubated for 24 hours with: (1) control media, (2) ASU, (3) LA, or (4) ASU + LA combination...
January 1, 2017: Cartilage
https://www.readbyqxmd.com/read/29154876/chondroitin-sulfate-from-scophthalmus-maximus-for-treating-osteoarthritis
#16
Zhenkun Ren, Yuanyuan Ji, Yi Wang, Liyuan Dong
Osteoarthritis (OA) is a common joint disease characterized by cartilage degradation. Chondroitin sulfate from shark (CS-S) has a good effect on OA in clinical, but due to source limited of CS from shark. Therefore, it is important to find a novel CS source with similar efficacy to CS-S in the treatment of OA. Herein, we reported a therapeutic effect of CS from scophthalmus maximus (CS-SM) for treating OA in rats. The OA model was established. After intervention with CS-SM by intragastric administration. Our results showed that CS-SM could protect articular cartilage in OA, inhibit the degradation of cartilage, decrease the apoptosis of chondrocytes, decline the content of interleukin-1, tumor necrosis factor-α and Prostaglandins E2 in synovial fluid, down-regulate the protein expression of matrix metalloproteinase-1 and up-regulate the protein expression of tissue inhibitor of metalloproteinase-1...
November 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29152560/effects-of-inflammation-on-multiscale-biomechanical-properties-of-cartilaginous-cells-and-tissues
#17
REVIEW
Q T Nguyen, T D Jacobsen, N O Chahine
Cells within cartilaginous tissues are mechanosensitive and thus require mechanical loading for regulation of tissue homeostasis and metabolism. Mechanical loading plays critical roles in cell differentiation, proliferation, biosynthesis, and homeostasis. Inflammation is an important event occurring during multiple processes, such as aging, injury, and disease. Inflammation has significant effects on biological processes as well as mechanical function of cells and tissues. These effects are highly dependent on cell/tissue type, timing, and magnitude...
November 13, 2017: ACS Biomaterials Science & Engineering
https://www.readbyqxmd.com/read/29149841/establishment-of-rat-ankle-post-traumatic-osteoarthritis-model-induced-by-malleolus-fracture
#18
Dawei Liang, Jian Sun, Fangyuan Wei, Jianzhong Zhang, Pengcui Li, Yingke Xu, Xianwen Shang, Jin Deng, Ting Zhao, Lei Wei
BACKGROUND: Malleolar fracture, which is present in 37-53% of human ankle osteoarthritis (OA), is the most common type of fracture in the ankle joint. In spite of this, no rat animal model has been developed for this type of injury to date. Here, we established a rat ankle post-traumatic OA (PTOA) model induced by malleolar fracture; this model will be useful in ankle OA research. METHODS: Two-month-old male Sprague Dawley (SD) rats were randomized into 2 groups (n = 19 per group): 1) malleolus articular fracture, dislocation, and immediate reduction on the right joints and 2) malleolus articular fracture on the right ankle...
November 17, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29149648/dried-plum-alleviates-symptoms-of-inflammatory-arthritis-in-tnf-transgenic-mice
#19
Faryal Mirza, Joseph Lorenzo, Hicham Drissi, Francis Y Lee, Do Y Soung
Dried plum (DP), a rich source of polyphenols has been shown to have bone-preserving properties in both animal models of osteoporosis and postmenopausal women. We evaluated if DP alleviated the destruction of joints in transgenic mice (TG) that overexpress human tumor necrosis factor (TNF), a genetic model of rheumatoid arthritis (RA). A four-week treatment of 20% DP diet in TG slowed the onset of arthritis and reduced bone erosions in the joints compared to TG on a regular diet. This was associated with fewer tartrate-resistant acid phosphatase (TRAP) positive cells, suggesting decreased osteoclastogenesis...
October 16, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29147820/cue-signal-response-analysis-in-3d-chondrocyte-scaffolds-with-anabolic-stimuli
#20
Michael Neidlin, Antonion Korcari, Giorgos Macheras, Leonidas G Alexopoulos
Articular cartilage is an avascular connective tissue responsible for bearing loads. Cell signaling plays a central role in cartilage homeostasis and tissue engineering by directing chondrocytes to synthesize/degrade the extracellular matrix or promote inflammatory responses. The aim of this paper was to investigate anabolic, catabolic and inflammatory pathways of well-known and underreported anabolic stimuli in 3D chondrocyte cultures and connect them to diverse cartilage responses including matrix regeneration and cell communication...
November 16, 2017: Annals of Biomedical Engineering
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