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https://www.readbyqxmd.com/read/28917911/injectable-glycosaminoglycan-protein-nano-complex-in-semi-interpenetrating-networks-a-biphasic-hydrogel-for-hyaline-cartilage-regeneration
#1
Janani Radhakrishnan, Anuradha Subramanian, Swaminathan Sethuraman
Articular hyaline cartilage regeneration remains challenging due to its less intrinsic reparability. The study develops injectable biphasic semi-interpenetrating polymer networks (SIPN) hydrogel impregnated with chondroitin sulfate (ChS) nanoparticles for functional cartilage restoration. ChS loaded zein nanoparticles (∼150nm) prepared by polyelectrolyte-protein complexation were interspersed into injectable SIPNs developed by blending alginate with poly(vinyl alcohol) and calcium crosslinking. The hydrogel exhibited interconnected porous microstructure (39...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28916968/hmgb-proteins-and-arthritis
#2
REVIEW
Noboru Taniguchi, Yasuhiko Kawakami, Ikuro Maruyama, Martin Lotz
The high-mobility group box (HMGB) family includes four members: HMGB1, 2, 3 and 4. HMGB proteins have two functions. In the nucleus, HMGB proteins bind to DNA in a DNA structure-dependent but nucleotide sequence-independent manner to function in chromatin remodeling. Extracellularly, HMGB proteins function as alarmins, which are endogenous molecules released upon tissue damage to activate the immune system. HMGB1 acts as a late mediator of inflammation and contributes to prolonged and sustained systemic inflammation in subjects with rheumatoid arthritis...
September 15, 2017: Human Cell
https://www.readbyqxmd.com/read/28915712/formation-function-and-exhaustion-of-notochordal-cytoplasmic-vacuoles-within-intervertebral-disc-current-understanding-and-speculation
#3
REVIEW
Feng Wang, Zeng-Xin Gao, Feng Cai, Arjun Sinkemani, Zhi-Yang Xie, Rui Shi, Ji-Nan Wei, Xiao-Tao Wu
Notochord nucleus pulposus cells are characteristic of containing abundant and giant cytoplasmic vacuoles. This review explores the embryonic formation, biological function, and postnatal exhaustion of notochord vacuoles, aiming to characterize the signal network transforming the vacuolated nucleus pulposus cells into the vacuole-less chondrocytic cells. Embryonically, the cytoplasmic vacuoles within vertebrate notochord originate from an evolutionarily conserved vacuolation process during neurulation, which may continue to provide mechanical and signal support in constructing a mammalian intervertebral disc...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915567/melatonin-inhibits-sirt1-dependent-nampt-and-nfat5-signaling-in-chondrocytes-to-attenuate-osteoarthritis
#4
Jia Yi Guo, Feng Li, Yong Bing Wen, Hong Xun Cui, Ma Long Guo, Lin Zhang, Yun Fei Zhang, Yan Jin Guo, Yan Xing Guo
Osteoarthritis (OA) is a degenerative joint disease mainly characterized by cartilage degradation. Interleukin-1β (IL-1β) contributes to OA pathogenesis by enhancing oxidative stress and inflammation. Melatonin reportedly elicits potent protection against OA. However, the role of melatonin and underlying mechanism in IL-1β-stimulated chondrocytes remain largely unclear. In this study, we found that melatonin inhibited IL-1β-induced toxicity and sirtuin 1 (Sirt1) enhancement in human chondrocytes. Melatonin reduced the IL-1β-increased nicotinamide phosphoribosyltransferase (NAMPT) expression and the NAD(+) level in chondrocytes in a Sirt1-dependent manner...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915523/-biologic-reconstruction-of-full-sized-cartilage-defects-of-the-hip-a-guideline-from-the-dgou-group-clinical-tissue-regeneration-and-the-hip-committee-of-the-aga
#5
Stefan Fickert, Matthias Aurich, Dirk Albrecht, Peter Angele, Lorenz Büchler, Michael Dienst, Christoph Erggelet, Jürgen Fritz, Christoph Gebhart, Hans Gollwitzer, Moritz Kindler, Christoph Lampert, Henning Madry, Gregor Möckel, Phillip Niemeyer, Jörg Schröder, Christian Sobau, Gunter Spahn, Wolfgang Zinser, Stefan Landgraeber
Background Symptomatic pre-arthritic deformities such as femoroacetabular impingement (FAI) or hip dysplasia often lead to localised cartilage defects and subsequently to osteoarthritis. The present review of the working group "Clinical Tissue Regeneration" of the German Society of Orthopaedics and Trauma (DGOU) and the hip committee of the AGA (German speaking Society for Arthroscopy and Joint Surgery) provides an overview of current knowledge of the diagnosis and surgical treatment of cartilage defects, in order to infer appropriate therapy recommendations for the hip...
September 15, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28915439/alpha-mangostin-suppresses-interleukin-1%C3%AE-induced-apoptosis-in-rat-chondrocytes-by-inhibiting-the-nf-%C3%AE%C2%BAb-signaling-pathway-and-delays-the-progression-of-osteoarthritis-in-a-rat-model
#6
Tianlong Pan, Rong Chen, Dengying Wu, Ningyu Cai, Xuchao Shi, Bin Li, Jun Pan
Osteoarthritis (OA) is a chronic degenerative joint disease that is characterized by progressive joint dysfunction and pain. Apoptosis and catabolism in chondrocytes play critical roles in the development of OA. Alpha-Mangostin (α-MG), one of the main components of the mangosteen, has been reported to have anti-apoptotic, anti-inflammatory and antioxidant effects. We investigated the therapeutic effects of α-MG on OA through experiments on rat chondrocytes in vitro and in a rat model of OA induced by destabilization of the medial meniscus (DMM)...
September 12, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28915300/inflammation-in-osteoarthritis
#7
Salvador Vilá
Advances in the understanding of chondrocytes and the synovial membrane as targets of and participants in the inflammatory process in articular joints have provided insights into the role of inflammation in cartilage and subchondral bone injury in rheumatic diseases. Reports that describe the inflammatory cellular infiltration of synovial membranes in patients with osteoarthritis, studies that associate cartilage structural injury with synovial membrane inflammatory status, the development of new imaging modalities that quantitatively measure synovial membrane inflammation and basic science advances that explore inflammatory pathways in the synovial cavity all suggest that inflammation plays an important role in cartilage injury in osteoarthritis...
September 2017: Puerto Rico Health Sciences Journal
https://www.readbyqxmd.com/read/28914997/synergistic-effect-of-l-ascorbic-acid-and-hyaluronic-acid-on-the-expressions-of-matrix-metalloproteinase-3-and-9-in-human-chondrocytes
#8
Teng-Le Huang, Che-Hua Yang, Goichi Yanai, Jo-Yu Liao, Shoichiro Sumi, Kai-Chiang Yang
Proinflammatory cytokines and reactive oxygen species (ROS) are known to be involved in the initiation and progression of osteoarthritis (OA). New evidence clarifying the correlation between ROS and inflammation has indicated that oxidative stress can up-regulate inflammatory cytokines. l-Ascorbic acid (AA), an antioxidant, has been shown to have anti-inflammatory effects and improve matrix deposition in chondrocytes. The purpose of this study was to examine the effects of hyaluronic acid (HA; 100 μg/mL) supplemented with AA (50 μg/mL) on human normal and interleukin-1 beta-stimulated (IL-1β, 10 ng/mL) chondrocytes...
September 15, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28912961/trpa1-expression-is-downregulated-by-dexamethasone-and-aurothiomalate-in-human-chondrocytes-trpa1-as-a-novel-factor-and-drug-target-in-arthritis
#9
Elina Nummenmaa, Mari Hämäläinen, Lauri J Moilanen, Teemu Moilanen, Katriina Vuolteenaho, Eeva Moilanen
No abstract text is available yet for this article.
2017: RMD Open
https://www.readbyqxmd.com/read/28912867/protective-effect-of-controlled-release-of-cytokine-response-modifier-a-from-chitosan-microspheres-on-rat-chondrocytes-from-interleukin-1%C3%AE-induced-inflammation-and-apoptosis
#10
Pang-Hu Zhou, Lei Shi, Bo Qiu
The aim of the present study was to investigate the protective effect of cytokine response modifier A (CrmA) released from chitosan (CS) microspheres in a controlled manner on interleukin (IL)-1β-induced inflammation and apoptosis in chondrocytes. The CrmA release kinetics were characterized by an initial burst release, which was reduced to a linear release over 8 days. Furthermore, chondrocytes were isolated from 1-week-old Sprague Dawley rats. The cell culture was established by stimulation with 10 ng/ml IL-1β and subsequent incubation with CS-CrmA microspheres...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28912864/evaluation-of-the-chondroprotective-action-of-n-acetylglucosamine-in-a-rat-experimental-osteoarthritis-model
#11
Daiki Kubomura, Tomoya Ueno, Masanori Yamada, Isao Nagaoka
It has been demonstrated that oral administration of N-acetylglucosamine (GlcNAc) alleviates the symptoms of osteoarthritis (OA). The aim of the present study was to elucidate the molecular mechanisms for the chondroprotective action of GlcNAc in OA. Biomarkers for type II collagen degradation and synthesis were evaluated, as were histopathological changes, using a rat anterior cruciate ligament transection (ACLT)-induced OA model. Changes in the expression of genes in the cartilage were assessed via DNA microarray and reverse transcription-quantitative polymerase chain reaction (RT-qPCR)...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28910961/paeonol-alleviates-interleukin-1%C3%AE-induced-inflammatory-responses-in-chondrocytes-during-osteoarthritis
#12
Mingran Liu, Shuqiang Zhong, Ruifeng Kong, Hong Shao, Chunyan Wang, Hongying Piao, Wentao Lv, Xiaojie Chu, Yan Zhao
Interleukin-1β (IL-1β)-induced inflammatory responses in chondrocytes play an important role in the pathogenesis of osteoarthritis (OA). Searching medicines that affect IL-1β-mediated chondrocytes function is critical in developing therapies for OA. Paeonol, as an important component in traditional Chinese medicine, has anti-inflammatory activity and can offer therapy for a multitude of inflammatory-related diseases. The purpose of this study was to investigate whether paeonol could alleviate the progression of OA through inhibition of IL-1β-induced inflammatory responses in chondrocytes...
September 10, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28910133/a-comparison-of-2-year-outcomes-in-patients-undergoing-tibiofemoral-or-patellofemoral-matrix-induced-autologous-chondrocyte-implantation
#13
Jay R Ebert, Adrian Schneider, Michael Fallon, David J Wood, Gregory C Janes
BACKGROUND: Matrix-induced autologous chondrocyte implantation (MACI) has demonstrated encouraging clinical results in the treatment of knee chondral defects. However, earlier studies suggested that chondrocyte implantation in the patellofemoral (PF) joint was less effective than in the tibiofemoral (TF) joint. PURPOSE: To compare the radiological and clinical outcomes of those undergoing MACI to either the femoral condyles or PF joint. STUDY DESIGN: Cohort study; Level of evidence, 3...
September 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28906146/new-cerebroside-and-chondrocyte-proliferation-activity-of-caryota-mitis-l
#14
Pham Thi Nhat Trinh, Nguyen Thi To Quynh, Mai Dinh Tri, Phan Nhat Minh, Nguyen Thi Le Thuy, Luu Hong Truong, Nguyen Ngoc Tuan, Le Tien Dung
Caryota mitis L., a flowering plant, belongs to the family Arecaceae. In Vietnam, its fruits were used to treat joint pain. The present study was designed to investigate the phytochemicals and chondrocyte proliferation activity of C. mitis L. fruits on young human chondrocyte. The results showed that all of extracts (crude extract as well as n-hexane, chloroform, ethyl acetate and methanol fractions) were stimulated the growth of chondrocyte at 0.1 μg/mL; 0.01 μg/mL concentrations, of which the n-hexane and methanol fractions significantly increased the proliferation of chondrocyte by 30...
September 14, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28906016/cxcl10-is-upregulated-in-synovium-and-cartilage-following-articular-fracture
#15
Bridgette D Furman, Collin L Kent, Janet L Huebner, Virginia B Kraus, Amy L McNulty, Farshid Guilak, Steven A Olson
The objective of this study was to investigate the expression of the chemokine CXCL10 and its role in joint tissues following articular fracture. We hypothesized that CXCL10 is upregulated following articular fracture and contributes to cartilage degradation associated with post-traumatic arthritis (PTA). To evaluate CXCL10 expression following articular fracture, gene expression was quantified in synovial tissue from knee joints of C57BL/6 mice that develop PTA following articular fracture, and MRL/MpJ mice that are protected from PTA...
September 14, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28903012/in-vitro-chondrotoxicity-of-nonsteroidal-anti-inflammatory-drugs-and-opioid-medications
#16
Geoffrey D Abrams, Wenteh Chang, Jason L Dragoo
BACKGROUND: A variety of medications are administered to the intra-articular space for the relief of joint pain. While amide-type local anesthetics have been extensively studied, there is minimal information regarding the potential chondrotoxicity of nonsteroidal anti-inflammatory drugs (NSAIDs) and opioid medications. PURPOSE: To investigate the in vitro chondrotoxicity of single-dose equivalent concentrations of ketorolac, morphine, meperidine, and fentanyl on human chondrocytes...
September 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28902474/electrospun-nanofibrous-meshes-cultured-with-wharton-s-jelly-stem-cell-an-alternative-for-cartilage-regeneration-without-the-need-of-growth-factors
#17
Marta Alves da Silva, Albino Martins, Ana R Costa-Pinto, Nélson Monteiro, Susana Faria, Rui L Reis, Nuno M Neves
Many efforts are being directed worldwide to the treatment of OA-focal lesions. The majority of those efforts comprise either the refinement of surgical techniques or combinations of biomaterials with various autologous cells. Herein, we tested electrospun polycaprolactone (PCL) nanofibrous meshes for cartilage tissue engineering. For that, articular chondrocytes (hACs) isolated from human osteoarthritic joints and Wharton's Jelly Stem Cells (hWJSCs) were cultured on electrospun nanofiber meshes, without adding external growth factors...
September 13, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28901584/the-primary-cilium-as-a-signaling-nexus-for-growth-plate-function-and-subsequent-skeletal-development
#18
REVIEW
Emily R Moore, Christopher R Jacobs
The primary cilium is a solitary, antenna-like sensory organelle with many important roles in cartilage and bone development, maintenance, and function. The primary cilium's potential role as a signaling nexus in the growth plate makes it an attractive therapeutic target for diseases and disorders associated with bone development and maintenance. Many signaling pathways that are mediated by the cilium - such as Hh, Wnt, Ihh/PTHrP, TGFβ, BMP, FGF, and Notch - are also known to influence endochondral ossification, primarily by directing growth plate formation and chondrocyte behavior...
September 13, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28901443/basic-fibroblast-growth-factor-increases-ift88-expression-in-chondrocytes
#19
Daolu Zhan, Wei Xiang, Fengjing Guo, Yuanzheng Ma
Intraflagellar transport protein 88 (IFT88) is protein crucial for the assembly and maintenance of primary cilia in chondrocytes. Primary cilia regulate mechanical and chemical signals in chondrocytes; however, the effects of cytokines on IFT88 expression and cilia formation and maintenance remain to be elucidated. Therefore, the role of basic fibroblast growth factor (bFGF) on IFT88 expression were examined in theATDC5 murine chondrocytic line, in order to investigate the signaling pathways involved in this process...
September 8, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28901183/ppar-%C3%AE-agonist-with-mesenchymal-stem-cells-induces-type-ii-collagen-producing-chondrocytes-in-human-arthritic-synovial-fluid
#20
Bruce E Heck, Joshua J Park, Vishruti Makani, Eun-Cheol Kim, Dong Hyun Kim
Osteoarthritis (OA) is an inflammatory joint disease characterized by degeneration of articular cartilage within synovial joints. An estimated 27 million Americans suffer from OA, and the population is expected to reach 67 million in the United States by 2030. Thus, it is urgent to find an effective treatment for OA. Traditional OA treatments have no disease-modifying effect, while regenerative OA therapies such as autologous chondrocyte implantation show some promise. Nonetheless, current regenerative therapies do not overcome synovial inflammation that suppresses the differentiation of mesenchymal stem cells (MSCs) to chondrocytes and the expression of type II collagen, the major constituent of functional cartilage...
August 2017: Cell Transplantation
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