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Connective Tissue Research

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https://www.readbyqxmd.com/read/28914550/socs3-participates-in-cholinergic-pathway-regulation-of-synovitis-in-rheumatoid-arthritis
#1
Tong Li, Shiyao Wu, Sha Li, Xuelian Bai, Hui Luo, Xiaoxia Zuo
Stimulation of the cholinergic inflammatory pathway can promote collagen-induced arthritis (CIA) and inhibit synovitis by Janus kinase (JAK) 2 and signal transducer and activator of transcription (STAT) 3 signaling. Suppressor of cytokine signaling (SOCS) protein can also regulate inflammatory processes and activate JAK/STAT signal transduction, but its involvement in rheumatoid arthritis (RA) has not been demonstrated. This study investigated the effect of SOCS on cholinergic pathway regulation of synovitis in the fibroblast-like synoviocytes (FLSs) of RA and CIA mice...
September 15, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28910556/probing-the-influence-of-sibling-proteins-on-collagen-i-fibrillogenesis-and-denaturation
#2
Chengyu Jiang, Kevin Zurick, Chunlin Qin, Matthew T Bernards
Bone tissue is comprised of collagen, non-collagenous proteins, and hydroxyapatite and the SIBLING (small integrin binding, N-linked glycoprotein) family of proteins is the primary group of non-collagenous proteins. By replicating the native interactions between collagen and the SIBLING family of proteins at the interface of an implant, it is believed that a bone scaffold will more easily integrate with the surrounding tissue. In this work bone sialoprotein (BSP), osteopontin (OPN), dentin sialoprotein (DSP), dentin phosphoprotein (DPP), C-terminal fragment of dentin matrix protein 1 (DMP1-C) and proteoglycan versions of DSP (DSP-PG) and DMP1 (DMP1-PG) were tested individually to determine their roles in collagen fibrillogenesis and the prevention of denaturation...
September 14, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28829698/the-pro-%C3%AE-1-v-collagen-gene-col5a1-is-coordinately-regulated-by-mir-29b-with-core-promoter-in-cultured-cells
#3
Juan Juan Zhang, Hiroyuki Yano, Takako Sasaki, Noritaka Matsuo, Hidekatsu Yoshioka
AIMS: Col5a1 encodes the α1 chain of type V collagen, a quantitatively minor fibrillar collagen that is critical for the formation and function of the organs in the body. MicroRNAs (miRNAs) are small noncoding RNAs that post-transcriptionally regulate biological functions by binding to the 3'- untranslated region (3'UTR) of specific target mRNA. In this study, we investigated the post-transcriptional regulation of miRNAs on the Col5a1 gene expression. MATERIALS AND METHODS: We cultured osteoblasts and fibroblasts of cell lines...
August 22, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28816569/effect-of-cyclic-uniaxial-compressive-stress-on-human-dental-pulp-cells-in-vitro
#4
Hui Yang, Yi-Xuan Shu, Lin-Yan Wang, Wen-Ling Zou, Li-Yang Guo, Mei-Ying Shao, Qian-Hua Gao, Tao Hu
PURPOSE: Teeth are exposed to various forces during functional and parafunctional movements. These processes inevitably affect the dental pulp, and the mechanism of these influences has been the subject of many previous studies using different apparatuses and obtaining different results. In this study, we aimed to investigate the effects of compressive stress on the proliferation and differentiation of human dental pulp cells (hDPCs). MATERIALS AND METHODS: A four-point bending strain system was adopted to apply low-density cyclic uniaxial compressive stress (2000 microstrain, 0...
August 17, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28750181/sirt-1-regulates-tgf-%C3%AE-induced-dermal-fibroblast-migration-via-modulation-of-cyr61-expression
#5
Eun-Jeong Kwon, Eun-Jung Park, Hyeran Yu, Jung-Sik Huh, Jinseok Kim, Moon-Jae Cho
SIRT1 is a NAD-dependent protein deacetylase that participates in cellular regulation. The increased migration of fibroblasts is an important phenotype in fibroblast activation. The role of SIRT1 in cell migration remains controversial as to whether SIRT1 acts as an activator or suppressor of cell migration. Therefore, we have established the role of SIRT1 in the migration of human dermal fibroblasts and explored targets of SIRT1 during dermal fibroblast migration. SIRT1 and Cyr61 were expressed in human dermal fibroblasts and the stimulation with TGF-β further induced their expression...
July 27, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28718671/freeze-dried-and-irradiated-allograft-bone-combined-with-fresh-autologous-coagula-promotes-angiogenesis-in-an-ectopic-bone-allograft-implantation-model
#6
Haibo Lu, Haoye Meng, Shibi Lu, Ling Qin, Bin Zhao, Aiyuan Wang, Jiang Peng, Wenjing Xu, Quanyi Guo, Jian Zhang
BACKGROUND: Freeze-dried and irradiated allograft bone (FIAB) is more easily impacted than fresh-frozen allograft bone (FAB) but has weaker incorporation efficiency. We combined FIAB with fresh autologous coagula to enhance donor-host incorporation after impaction during hip revision. METHODS: Thirty adult male Sprague-Dawley rats were sacrificed for bone allograft harvesting, and nine male rats were subjected to ectopic bone allograft implantation. For each rat, the container on the left (study) side was filled with freeze-dried allograft bone powder and fresh autologous blood coagula, whereas the right (control) side was filled with freeze-dried allograft bone powder and physiological saline...
July 18, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28696808/bone-morphogenetic-protein-7-transduced-human-dermal-derived-fibroblast-cells-differentiate-into-osteoblasts-and-form-bone-in-vivo
#7
Fuguo Chen, Dan Bi, Guangqing Cao, Chen Cheng, Sunxiang Ma, Yang Liu, Kaixiang Cheng
BACKGROUND: Human dermal-derived fibroblast cells (hDDFCs) are multipotent. Bone morphogenetic proteins (BMPs) are a group of cytokines that promote different developmental processes, including the formation of bone. BMPs can promote hDDFC osteogenesis, but the role of BMP7 in hDDFC osteogenesis in vitro and bone formation in vivo has not been investigated in depth. MATERIALS AND METHODS: hDDFCs were stably transfected with a human BMP7 recombinant adenovirus and osteogenic differentiation was examined by alkaline phosphatase staining and calcium accumulation...
July 11, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28682114/effectiveness-of-topical-application-of-ostrich-oil-on-the-healing-of-staphylococcus-aureus-and-pseudomonas-aeruginosa-infected-wounds
#8
Mohammad Reza Farahpour, Mahsa Vahid, Ahmad Oryan
BACKGROUND/AIMS: Management of infected wounds is one of the major challenges that surgeons and nurses face. Several antimicrobial agents have been used, but the toxicity, drug resistance, and their effect on the healing process remain a matter of concern. The present study was designed to analyze the accelerative impact of topical application of ostrich oil on infected wounds in a mouse model. MATERIALS AND METHODS: 72 BALB/c mice were divided into four main groups of control-sham, mupirocin, and two treatment groups receiving 2% and 4% (w/w) concentrations of ostrich oil, topically...
July 6, 2017: 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
#9
Hiroko Makihara, Moeko Hidaka, Yui Sakai, Yoshiko Horie, Hideaki Mitsui, Kenichi Ohashi, Yoshio Goshima, Tomoko Akase
AIM OF THE STUDY: Our previous research 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)...
September 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/27813681/cyclic-muscle-twitch-contraction-inhibits-immobilization-induced-muscle-contracture-and-fibrosis-in-rats
#10
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 (NMES) on immobilization-induced muscle contracture and fibrosis in rats. Twenty-nine rats were divided into control, immobilization, and immobilization with muscle contraction groups. The ankle joints of the immobilization and muscle contraction rats were fixed in full plantar flexion with a plaster cast for 4 weeks. In the muscle contraction 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...
September 2017: 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
#11
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 (PRP), 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...
September 2017: 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
#12
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...
September 2017: 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
#13
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...
September 2017: 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...
September 2017: 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
#15
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 2017: 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
#16
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 2017: 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
#17
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 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/27599801/current-strategies-for-integrative-cartilage-repair
#18
Margaret K Boushell, Clark T Hung, Ernst B Hunziker, Eric J Strauss, Helen H Lu
Osteoarthritis (OA) is a degenerative joint condition characterized by painful cartilage lesions that impair joint mobility. Current treatments such as lavage, microfracture, and osteochondral implantation fail to integrate newly formed tissue with host tissues and establish a stable transition to subchondral bone. Similarly, tissue-engineered grafts that facilitate cartilage and bone regeneration are challenged by how to integrate the graft seamlessly with surrounding host cartilage and/or bone. This review centers on current approaches to promote cartilage graft integration...
September 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28605223/homeobox-c10-inhibits-the-osteogenic-differentiation-potential-of-mesenchymal-stem-cells
#19
Guoqing Li, Nannan Han, Haoqing Yang, Liping Wang, Xiao Lin, Shu Diao, Juan Du, Rui Dong, Songlin Wang, Zhipeng Fan
PURPOSE: Mesenchymal stem cells (MSCs) are a reliable cell source for tissue regeneration. However, the molecular mechanisms underlying the directed differentiation of MSCs remain unclear which impedes potential clinical applications. Recent studies have discovered that HOX genes are involved in the differentiation regulation of MSCs and bone formation. In this study, we investigate the HOXC10 function in the osteogenic differentiation potential of MSCs. MATERIALS AND METHODS: Stem cells from apical papilla (SCAPs) and adipose-derived stem cells (ADSCs) were used in this study...
June 12, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28509587/link-protein-n-terminal-peptide-and-fullerol-promote-matrix-production-and-decrease-degradation-enzymes-in-rabbit-annulus-cells
#20
Ching-Hua Yeh, Dennis Chen, Bayan Aghdasi, Li Xiao, Mengmeng Ding, Li Jin, Xudong Li
PURPOSE: Intervertebral disc degeneration is a major cause of back pain. Novel therapies for prevention or reversal of disc degeneration are needed. It is desirable for potential therapies to target both inflammation and matrix degeneration. MATERIALS AND METHODS: The combined regenerative potential of link protein N-terminal peptide (LN) and fullerol on annulus fibrosus (AF) cells was evaluated in a 3D culture model. RESULTS: Interleukin-1α (IL-1α)-induced AF cell degeneration was counteracted by fullerol, LN, and fullerol + LN, with the latter having the greatest effect on matrix production as evaluated by real-time polymerase chain reaction and glycosaminoglycan assay...
May 16, 2017: Connective Tissue Research
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