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Connective Tissue Research

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https://www.readbyqxmd.com/read/27905856/1-25-dihydroxyvitamin-d3-stimulates-odontoblastic-differentiation-of-human-dental-pulp-stem-cells-in-vitro
#1
Goksen Mucuk, Elif Sepet, Mine Erguven, Ozlem Ekmekci, Ayhan Bilir
BACKGROUND: 1,25-dihydroxyvitamin D3 (1,25-OH D3) plays an important role in mineralized tissue metabolism, including teeth. However, few studies have addressed its role in odontoblastic differentiation of human dental pulp-stem cells (hDPSCs). AIM: This study aimed to understand the influence of various concentrations of 1,25-OH D3 on the proliferation capacity and early dentinogenesis responses of hDPSCs. MATERIALS AND METHODS: hDPSCs were obtained from the impacted third molar teeth...
December 1, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27898233/hyaluronan-stimulates-chondrogenic-gene-expression-in-human-meniscus-cells
#2
Takaaki Tanaka, Takayuki Furumatsu, Shinichi Miyazawa, Masataka Fujii, Hiroto Inoue, Yuya Kodama, Toshifumi Ozaki
: Purpose/Aim of the Study: Inner meniscus cells have a chondrocytic phenotype, whereas outer meniscus cells have a fibroblastic phenotype. In this study, we examined the effect of hyaluronan on chondrocytic gene expression in human meniscus cells. MATERIALS AND METHODS: Human meniscus cells were prepared from macroscopically intact lateral meniscus. Inner and outer meniscus cells were obtained from the inner and outer halves of the meniscus. The cells were stimulated with hyaluronan diluted in Dulbecco's modified Eagle's medium without serum to the desired concentration (0, 10, 100, and 1000 μg/mL) for 2-7 days...
November 29, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27892729/reduction-and-fragmentation-of-elastic-fibers-in-the-skin-of-obese-mice-is-associated-with-altered-mrna-expression-levels-of-fibrillin-1-and-neprilysin
#3
Hiroko Makihara, Moeko Hidaka, Yui Sakai, Yoshiko Horie, Hideaki Mitsui, Kenichi Ohashi, Yoshio Goshima, Tomoko Akase
AIM OF THE STUDY: Our previous researches suggested that obesity induces structural fragility in the skin. Elastic fibers impart strength and elasticity. In this study, we determined whether elastic fibers decrease in the skin of obese mice. MATERIALS AND METHODS: To confirm alterations in elastic fiber content due to obesity, we used spontaneously obese model mice (TSOD) and control mice (TSNO). Furthermore, to evaluate the elastin structure and gene expression dependent on the severity of obesity, an obesity-enhanced mouse model was developed by feeding a high fat diet to TSOD (TSOD-HF)...
November 28, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27813681/cyclic-muscle-twitch-contraction-inhibits-immobilization-induced-muscle-contracture-and-fibrosis-in-rats
#4
Ayana Yoshimura, Junya Sakamoto, Yuichiro Honda, Hideki Kataoka, Jiro Nakano, Minoru Okita
We investigated the effects of cyclic muscle twitch contraction caused by neuromuscular electrical stimulation on immobilization-induced muscle contracture and fibrosis in rats. Twenty-nine rats were divided into control, immobilization (IM), and immobilization with muscle contraction (MC) groups. The ankle joints of the IM and MC rats were fixed in full plantar flexion with a plaster cast for 4 weeks. In the MC group, cyclic muscle twitch contraction of the soleus muscle was induced using a commercial device (1 Hz, 4±2 mA, 60 min/day, 5 times/week) with the ankle joint immobilized...
November 4, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27813662/matrix-metalloproteinase-activity-and-prostaglandin-e2-are-elevated-in-the-synovial-fluid-of-meniscus-tear-patients
#5
Betty Liu, Adam P Goode, Teralyn E Carter, Gangadhar M Utturkar, Janet L Huebner, Dean C Taylor, Claude T Moorman Iii, William E Garrett, Virginia B Kraus, Farshid Guilak, Louis E DeFrate, Amy L McNulty
PURPOSE: Meniscus tears are a common knee injury and are associated with the development of post-traumatic osteoarthritis (OA). The purpose of this study was to evaluate potential OA mediators in the synovial fluid and serum of meniscus tear subjects compared to those in the synovial fluid of radiographic non-OA control knees. MATERIALS AND METHODS: Sixteen subjects with an isolated unilateral meniscus injury and six subjects who served as reference controls (knee Kellgren-Lawrence grade 0-1) were recruited...
November 4, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27813659/recent-advances-in-epigenetic-regulation-of-skeletal-development-homeostasis-and-disease
#6
Audrey McAlinden
No abstract text is available yet for this article.
November 4, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27797605/quantitative-histological-grading-methods-to-assess-subchondral-bone-and-synovium-changes-subsequent-to-medial-meniscus-transection-in-the-rat
#7
Heidi E Kloefkorn, Kyle D Allen
AIM OF THE STUDY: The importance of the medial meniscus to knee health is demonstrated by studies which show meniscus injuries significantly increase the likelihood of developing osteoarthritis (OA), and knee OA can be modeled in rodents using simulated meniscus injuries. Traditionally, histological assessments of OA in these models have focused on damage to the articular cartilage; however, OA is now viewed as a disease of the entire joint as an organ system. The aim of this study was to develop quantitative histological measures of bone and synovial changes in a rat medial meniscus injury model of knee OA...
October 31, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27791406/reconstruction-of-cranial-cruciate-ligament-in-rabbits-using-polyester-implants-saturated-with-prp-antlerogenic-stem-cells-mic-1-and-their-homogenate
#8
Przemysław Prządka, Zdzisław Kiełbowicz, Bogdan Osiński, Stanisław Dzimira, Janusz A Madej, Wojciech Nowacki, Krzysztof Kubiak, Paweł Reichert, Marek Cegielski
AIM OF THE STUDY: The attempt to limit the negative effects of polyester implants on the articular cavity by using preparations containing growth factors. MATERIALS AND METHODS: Polyester implants used for the reconstruction of a rabbit's cranial cruciate ligament (CCL) were saturated with autogenic platelet-rich plasma, antlerogenic stem cells MIC-1 and their homogenate prior to the surgery. Six months after CCL reconstruction, morphological and biochemical blood tests were carried out, including proteinogram and acute phase proteins...
October 28, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27764545/collagen-gel-protects-l929-cells-from-tnf%C3%AE-induced-death-by-activating-nf-%C3%AE%C2%BAb
#9
Hong-Ju Wang, Meng-Qi Li, Wei-Wei Liu, Toshihiko Hayashi, Hitomi Fujisaki, Shunji Hattori, Shin-Ichi Tashiro, Satoshi Onodera, Takashi Ikejima
PURPOSE: Type I collagen is one of the most abundant components of extracellular matrix. We previously illustrated that murine fibrosarcoma L929 cells grew well on type I collagen gel and escaped from TNFα-induced cell death. In this study, we investigated the mechanism underlying the protective effect of collagen gel. MATERIAL AND METHODS: We used western blot, confocal microscopy, MTT assay and flow cytometry by introducing fluorescence staining to determine the expression levels of nuclear factor kappa B (NF-κB), inhibitory ratio and autophagy...
October 20, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27763799/creating-conditional-dual-fluorescence-labeled-transgenic-animals-for-studying-function-of-small-noncoding-rnas
#10
Kun Yang, Yun Gao, Mingfu Yang, Zuoshang Xu, Qian Chen
Because the function of most noncoding (nc) RNAs is unknown, Cre-lox transgenic mice are useful tools to determine their functions in a tissue or developmental stage-specific manner. However, the technology faces challenges because expression of ncRNA-transgene lacks protein product. No antibody or peptide-tag can be used to trace ncRNA expression in mouse tissues in real time. Furthermore, transgene integration at different locus or orientations in the genome may result in recombination of genomic fragments in the Cre-lox system...
October 20, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27753517/introduction
#11
Stavros Thomopoulos
No abstract text is available yet for this article.
October 18, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27726455/co-culture-with-infrapatellar-fat-pad-differentially-stimulates-proteoglycan-synthesis-and-accumulation-in-cartilage-and-meniscus-tissues
#12
James F Nishimuta, Monica F Bendernagel, Marc E Levenston
PURPOSE: Although osteoarthritis is widely viewed as a disease of the whole joint, relatively few studies have focused on interactions among joint tissues in joint homeostasis and degeneration. In particular, few studies have examined the effects of the infrapatellar fat pad (IFP) on cartilaginous tissues. The aim of this study was to test the hypothesis that co-culture with healthy IFP would induce degradation of cartilage and meniscus tissues. MATERIALS AND METHODS: Bovine articular cartilage, meniscus, and IFP were cultured isolated or as cartilage-fat or meniscus-fat co-cultures for up to 14 days...
October 11, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27726454/rapidly-dissociated-autologous-meniscus-tissue-enhances-meniscus-healing-an-in-vitro-study
#13
Piya-On Numpaisal, Benjamin B Rothrauff, Riccardo Gottardi, Chung-Liang Chien, Rocky S Tuan
PURPOSE: Treatment of meniscus tears is a persistent challenge in orthopedics. Although cell therapies have shown promise in promoting fibrocartilage formation in in vitro and preclinical studies, clinical application has been limited by the paucity of autologous tissue and the need for ex vivo cell expansion. Rapid dissociation of the free edges of the anterior and posterior meniscus with subsequent implantation in a meniscus lesion may overcome these limitations. The purpose of this study was to explore the effect of rapidly dissociated meniscus tissue in enhancing neotissue formation in a radial meniscus tear, as simulated in an in vitro explant model...
October 11, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27726447/exposure-of-a-tendon-extracellular-matrix-to-synovial-fluid-triggers-endogenous-and-engrafted-cell-death-a-mechanism-for-failed-healing-of-intrathecal-tendon-injuries
#14
Elaine R Garvican, Mazdak Salavati, Roger K W Smith, Jayesh Dudhia
AIM: The purpose of this study was to investigate the effect of normal synovial fluid (SF) on exposed endogenous tendon-derived cells (TDCs) and engrafted mesenchymal stem cells (MSCs) within the tendon extracellular matrix. METHODS: Explants from equine superficial digital flexor (extra-synovial) and deep digital flexor tendons (DDFTs) from the compressed, intra-synovial and the tensile, extra-synovial regions were cultured in allogeneic or autologous SF-media...
October 11, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27715381/meniscal-biology-in-health-and-disease
#15
James L Cook, Keiichi Kuroki, Aaron M Stoker, Farrah A Monibi, Brandon L Roller
The knee is a fascinating yet complex joint. Researchers and clinicians agree that the joint is an organ comprised of highly specialized intrinsic and extrinsic tissues contributing to both health and disease. Key to the function and movement of the knee are the menisci, exquisite fibrocartilage structures that are critical structures for maintaining biologic and biomechanical integrity of the joint. The biologic/physiologic functions of the menisci must be understood at the tissue, cellular and even molecular levels in order to determine clinically relevant methods for assessing it and influencing it...
October 7, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27668694/autophagy-in-osteoarthritis
#16
Hyelin Jeon, Gun-Il Im
Osteoarthritis is characterized by continuous degeneration of articular cartilage resulting in disability. The death of chondrocytes and the loss of the extracellular matrix are the central peculiarities in cartilage degeneration during osteoarthritis pathogenesis. Autophagy is an essential cellular homeostasis mechanism whereby cellular organelles and macromolecules are recycled to maintain cellular metabolism. Autophagy is reported to be cytoprotective effects for articular cartilage, and osteoarthritis is associated with decreased autophagy...
September 26, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27662443/histone-deacetylase-3-suppresses-erk-phosphorylation-and-matrix-metalloproteinase-mmp-13-activity-in-chondrocytes
#17
Lomeli R Carpio, Elizabeth W Bradley, Jennifer J Westendorf
Histone deacetylase inhibitors are emerging therapies for many diseases including cancers and neurological disorders; however, these drugs are teratogens to the developing skeleton. Hdac3 is essential for proper endochondral ossification as its deletion in chondrocytes increases cytokine signaling and the expression of matrix remodeling enzymes. Here we explored the mechanism by which Hdac3 controls Mmp13 expression in chondrocytes. In Hdac3-depleted chondrocytes, Erk1/2 as well as its downstream substrate, Runx2, were hyperphosphorylated as a result of decreased expression and activity of the Erk1/2 specific phosphatase, Dusp6...
September 23, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27662266/the-role-of-three-dimensional-pure-bovine-gelatin-scaffolds-in-tendon-healing-modeling-and-remodeling-an-in-vivo-investigation-with-potential-clinical-value
#18
Ahmad Oryan, Pardis Sharifi, Ali Moshiri, Ian A Silver
AIM OF THE STUDY: Large tendon defects involving extensive tissue loss present complex clinical problems. Surgical reconstruction of such injuries is normally performed by transplanting autogenous and allogenous soft tissues that are expected to remodel to mimic a normal tendon. However, the use of grafts has always been associated with significant limitations. Tissue engineering employing artificial scaffolds may provide acceptable alternatives. Gelatin is a hydrolyzed form of collagen that is bioactive, biodegradable, and biocompatible...
September 23, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27657550/removal-of-dentin-non-collagenous-structures-results-in-the-unraveling-of-microfibril-bundles-in-collagen-type-i
#19
Luiz E Bertassoni, Michael V Swain
AIMS: The structural organization of collagen from mineralized tissues, such as dentin and bone, has been a topic of debate in the recent literature. Recent reports have presented novel interpretations of the complexity of collagen type I at different hierarchical levels and in different tissues. Here we investigate the nanostructural organization of demineralized dentin collagen following the digestion of non-collagenous components with a trypsin enzyme. MATERIALS AND METHODS: Dentin specimens were obtained from healthy third-molars, cut into small cubes and polished down to 1 µm roughness...
September 22, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27600173/mechanical-stretch-and-hypoxia-inducible-factor-1-alpha-affect-the-vascular-endothelial-growth-factor-and-the-connective-tissue-growth-factor-in-cultured-acl-fibroblasts
#20
Yequan Wang, Zhen Dang, Wen Cui, Li Yang
PURPOSES: The adult human anterior cruciate ligament (ACL) has poor functional healing response. Hypoxia plays an important role in regulating the microenvironment of the joint cavity after ACL injury, however, its role in mechanical injury is yet to be examined fully in ACL fibroblasts. In this study, we used CoCl2 to induce Hypoxia-inducible factor-1α (HIF-1α) in our experimental model to study its affect on matrix metalloproteinase-2 (MMP-2), vascular endothelial growth factor (VEGF), and connective tissue growth factor (CTGF) expression in ACL fibroblasts after mechanical stretch...
September 6, 2016: Connective Tissue Research
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