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https://www.readbyqxmd.com/read/28648041/-effects-of-hypoxia-on-the-phenotype-transformation-of-human-dermal-fibroblasts-to-myofibroblasts-and-the-mechanism
#1
B Zhao, F Han, W Zhang, X J Wang, J Zhang, F F Yang, J H Shi, L L Su, D H Hu
Objective: To investigate the effects of hypoxia on the phenotype transformation of human dermal fibroblasts to myofibroblasts and the mechanism. Methods: The third passage of healthy adult human dermal fibroblasts in logarithmic phase were cultured in DMEM medium containing 10% fetal bovine serum for the following five experiments. (1) In experiments 1, 2, and 3, cells were divided into normoxia group and hypoxia group according to the random number table, with 10 dishes in each group. Cells of normoxia group were cultured in incubator containing 21% oxygen, while those of hypoxia group with 1% oxygen...
June 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28648015/-therapeutic-effects-of-tubastatin-a-hcl-on-airway-inflammation-in-acute-mice-asthma-model
#2
X M Su, Y Ren, M L Li, X Zhao, J Kang
Objective: To investigated the therapeutic effects of Tubastatin A Hcl, a selective HDAC6 inhibitor, on airway inflammation in acute mice bronchial asthma (asthma) model. Methods: A total of 48 BALB/C mice were randomly divided into control group, asthma group, dexamethasone group and Tubastatin A Hcl group with 12 mice in each group. Then the airway hyperresponsiveness was assessed in each group; total cell number, different cell number, levels of Interleukin (IL)-4, IL-5 and Interferon-γ (IFN-γ) in the bronchoalveolar lavage fluid (BALF) were detected; the lung tissues of each group were stained with HE to observe the inflammatory cells infiltration...
June 27, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28648006/-0-5-gy-x-ray-radiation-promotes-osteoblast-differentiation-by-wnt-%C3%AE-catenin-signaling
#3
M Chen, Q R Dong, Q Huang, C She, W Xu
Objective: To investigate the important roles of Wnt signaling in the processes of 0.5Gy X-ray promoting osteoblast differentiation, and make clear the molecular mechanisms involved. Methods: Flow cytometry was employed to detect the apoptosis after osteoblast exposure to 0.5 Gy X-ray radiation.The protein level of osteoblast differentiation markers, such as collagen Iα (Col1α), alkaline phosphatase (ALP), osteocalcin (OCN), were detected by Western-blot and ALP activity staining was performed. Real-time PCR and Western-blot were utilized to evaluate the variations of key factors in Wnt signaling pathways, while specific inhibitor of Wnt/β-Catenin, XAV939 was used to block the Wnt signaling...
June 20, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28647773/cthrc1-promotes-osteogenic-differentiation-of-periodontal-ligament-stem-cells-by-regulating-taz
#4
Chengze Wang, Weiting Gu, Baiyu Sun, Yunpeng Zhang, Yawen Ji, Xin Xu, Yong Wen
Collagen triple helix repeat containing 1 (CTHRC1) is associated with bone metabolism. Alveolar bone has an ability to rapidly remodel itself to adapt its biomechanical environment and function. However, whether CTHRC1 is expressed in alveolar bone tissue and the role of CTHRC1 in alveolar bone remodeling remain unclear. We used orthodontic tooth movement (OTM) rat model to study the effects of CHTRC1 in alveolar bone remodeling in vivo. We found that CTHRC1 was expressed in normal physiological condition of osteocytes, bone matrix, and periodontal ligament cells in rat...
June 24, 2017: Journal of Molecular Histology
https://www.readbyqxmd.com/read/28647730/qiliqiangxin-attenuates-adverse-cardiac-remodeling-after-myocardial-infarction-in-ovariectomized-mice-via-activation-of-ppar%C3%AE
#5
Shutong Shen, Huimin Jiang, Yihua Bei, Jialiang Zhang, Haifeng Zhang, Hongsheng Zhu, Chenlin Zhang, Wenming Yao, Cong Wei, Hongcai Shang, Xinli Li
BACKGROUND/AIMS: This study was designed to investigate the therapeutic effect of traditional Chinese medication Qiliqiangxin (QLQX) on adverse cardiac remodeling after myocardial infarction (MI) in bilateral ovariectomized (OVX) female mice. METHODS: Eight-week old female C57BL/6 mice were operated to ligate the left anterior descending coronary artery seven days after bilateral ovariectomy and were orally administered either QLQX or vehicle. 21 days after ligation, echocardiography was performed to evaluate the heart function of all mice...
June 23, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28647600/the-in-vitro-biocompatibility-of-d-raffinose-modified-chitosan-two-dimensional-and-three-dimensional-systems-for-culturing-of-horse-articular-chondrocytes
#6
Elena De Angelis, Francesca Ravanetti, Paolo Martelli, Antonio Cacchioli, Ana Ivanovska, Attilio Corradi, Sonia Nasi, Annalisa Bianchera, Benedetta Passeri, Elena Canelli, Ruggero Bettini, Paolo Borghetti
The present study investigated the biocompatibility of chitosan films and scaffolds modified with d-(+)raffinose and their capability to support the growth and maintenance of the differentiation of articular chondrocytes in vitro. Primary equine articular chondrocytes were cultured on films and scaffolds of modified d-(+) raffinose chitosan. Their behavior was compared to that of chondrocytes grown in conventional bi- and three-dimensional culture systems, such as micromasses and alginate beads. Chitosan films maintained the phenotype of differentiated chondrocytes (typical round morphology) and sustained the synthesis of cartilaginous extracellular matrix (ECM), even at 4weeks of culture...
June 15, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28647591/chitosan-based-nanocomposites-for-the-repair-of-bone-defects
#7
L Keller, A Regiel-Futyra, M Gimeno, S Eap, G Mendoza, V Andreu, Q Wagner, A Kyzioł, V Sebastian, G Stochel, M Arruebo, N Benkirane-Jessel
Chitosan scaffolds of different deacetylation degrees, average molecular weights and concentrations reinforced with silica nanoparticles were prepared for bone tissue regeneration. The resulting nanocomposites showed similar pore sizes (<300μm) regardless the deacetylation degree and concentration used in their formulation. Their mechanical compression resistance was increased by a 30% with the addition of silica nanoparticles as nanofillers. The biocompatibility of the three-dimensional chitosan scaffolds was confirmed by the Alamar Blue assay in human primary osteoblasts as well as the formation of cell spheroids indicative of their great potential for bone regeneration...
June 21, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28647522/functional-medium-term-results-after-autologous-matrix-induced-chondrogenesis-for-osteochondral-lesions-of-the-talus-a-5-year-prospective-cohort-study
#8
Oliver Gottschalk, Sebastian Altenberger, Sebastian Baumbach, Stefanie Kriegelstein, Florian Dreyer, Alexander Mehlhorn, Hubert Hörterer, Andreas Töpfer, Anke Röser, Markus Walther
Autologous matrix-induced chondrogenesis (AMIC) has gained popularity in the treatment of osteochondral lesions of the talus. Previous studies have presented promising short-term results for AMIC talar osteochondral lesion repair, a 1-step technique using a collagen type I/III bilayer matrix. The aim of the present study was to investigate the mid-term effects. The 5-year results of a prospective cohort study are presented. All patients underwent an open AMIC procedure for a talar osteochondral lesion. Data analysis included general demographic data, preoperative magnetic resonance imaging findings, intraoperative details, and German version of the Foot Function Index (FFI-D) scores preoperatively and at 1 and 5 years after surgery...
June 21, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28647476/substance-p-promotes-hepatic-stellate-cell-proliferation-and-activation-via-the-tgf-%C3%AE-1-smad-3-signaling-pathway
#9
Lei Peng, Xiaoqing Jia, Jianjian Zhao, Ruibing Cui, Ming Yan
Prolonged activation and proliferation of hepatic stellate cells (HSCs) usually results in the initiation and progression of liver fibrosis following injury. Recent studies have shown that Substance P (SP) participates in the development of fibrosis. However, whether SP is involved in liver fibrosis, especially in the activation and proliferation of HSCs, is largely unknown. In the present study, we measured the effects of a series of concentrations of SP on the cell viability and activation of HSC-T6 cells and LX2 cells...
June 21, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28647469/intra-articular-injection-of-microrna-140-alleviates-osteoarthritis-progression-by-modulating-extracellular-matrix-homeostasis-in-rats
#10
Hai-Bo Si, Yi Zeng, Shu-Yun Liu, Zong-Ke Zhou, You-Nan Chen, Jing-Qiu Cheng, Yan-Rong Lu, Bin Shen
OBJECTIVE: Disruptions of extracellular matrix (ECM) homeostasis are key events in the pathogenesis of osteoarthritis (OA). MicroRNA-140 (miRNA-140) is expressed specifically in cartilage and regulates ECM-degrading enzymes. Our objective in this study was to determine if intra-articular injection of miRNA-140 can attenuate OA progression in rats. DESIGN: miRNA-140 levels in human normal and OA cartilage derived chondrocytes and synovial fluid were assessed by polymerase chain reaction (PCR)...
June 21, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28647370/oleanolic-acid-prevents-cartilage-degeneration-in-diabetic-mice-via-ppar%C3%AE-associated-mitochondrial-stabilization
#11
Xia Kang, Zhikui Yang, Jun Sheng, Jin-Biao Liu, Qing-Yun Xie, Wei Zheng, Ken Chen
Hyperglycemia-induced cartilage degeneration induces osteoarthritis (OA). Since oleanolic acid (OLA) have several pharmacological effects such as anti-inflammatory, anti-oxidant, we hypothesized it possesses protection against high glucose injured cartilage. We now report that OLA decreased type X collagen and reversed the cartilage degeneration in growth plate from db/db mice. OLA increased type Ⅱ collagen expression in a concentration-dependent manner (10-50 μΜ) in high glucose-treated chondrocytes. OLA prevented the high glucose induced cell injury and decreased the level of MMP-13, PGE2 and IL-6 due to decreasing mitochondrial membrane potential and stimulated the ATP production...
June 21, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28646903/human-adipose-tissue-mesenchymal-stromal-cells-and-their-extracellular-vesicles-act-differentially-on-lung-mechanics-and-inflammation-in-experimental-allergic-asthma
#12
Ligia Lins de Castro, Debora Gonçalves Xisto, Jamil Zola Kitoko, Fernanda Ferreira Cruz, Priscilla Christina Olsen, Patricia Albuquerque Garcia Redondo, Tatiana Paula Teixeira Ferreira, Daniel Jay Weiss, Marco Aurélio Martins, Marcelo Marcos Morales, Patricia Rieken Macedo Rocco
BACKGROUND: Asthma is a chronic inflammatory disease that can be difficult to treat due to its complex pathophysiology. Most current drugs focus on controlling the inflammatory process, but are unable to revert the changes of tissue remodeling. Human mesenchymal stromal cells (MSCs) are effective at reducing inflammation and tissue remodeling; nevertheless, no study has evaluated the therapeutic effects of extracellular vesicles (EVs) obtained from human adipose tissue-derived MSCs (AD-MSC) on established airway remodeling in experimental allergic asthma...
June 24, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28646872/role-of-p2x7r-in-the-development-and-progression-of-pulmonary-hypertension
#13
Jie Yin, Shuling You, Haopeng Liu, Li Chen, Chengdong Zhang, Hesheng Hu, Mei Xue, Wenjuan Cheng, Ye Wang, Xinran Li, Yugen Shi, Nannan Li, Suhua Yan, Xiaolu Li
BACKGROUND: Pulmonary arterial hypertension (PAH) is a devastating disease that lacks sufficient treatment. Studies have shown that the Nod-like receptor family, pyrin domain containing 3 (NLRP3) inflammasome contributes to PAH pathogenesis, but the role of the upstream molecular P2X7 receptor (P2X7R) has remained unexplored. We investigated the role of P2X7R in the pathogenesis of PAH. METHODS AND RESULTS: PH was induced by a single subcutaneous injection of monocrotaline (MCT) (60 mg/kg) on left pneumonectomised Sprague-Dawley rats, as validated by significant increases in pulmonary artery pressure and vessel wall thickness...
June 24, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28646601/autophagy-activation-is-required-for-myofibroblasts-differentiation-during-healing-of-oral-mucosa
#14
Enrica Vescarelli, Andrea Pilloni, Francesco Dominici, Paola Pontecorvi, Antonio Angeloni, Antonella Polimeni, Simona Ceccarelli, Cinzia Marchese
AIM: It is known that periodontal tissues heal faster that skin, and gingiva in particular heal without scar formation. The mechanisms regulating this behavior are still unclear. The aim of our work is to compare wound healing in oral mucosa and gingiva, investigating the role of αSMA-expressing myofibroblasts and autophagy. MATERIALS AND METHODS: Biopsies were obtained from 7 patients immediately before and 24h after vertical releasing incision in oral mucosa and attached gingiva...
June 24, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28646507/influences-of-placental-growth-factor-on-mouse-retinal-vascular-development
#15
Vanessa R Kay, Chandrakant Tayade, Peter Carmeliet, B Anne Croy
BACKGROUND: Placental Growth Factor (PGF) is important for wound-healing and vascular collaterogenesis. PGF deficiency is associated with preeclampsia, a hypertensive disease of human pregnancy. Offspring born to preeclamptic mothers display cognitive impairments and brain vascular and neurostructural deviations. Low PGF production during development may contribute to alterations in offspring cerebrovascular beds. Retina is a readily accessible part of the central nervous system with a well-described pattern of vascular development in mice...
June 24, 2017: Developmental Dynamics: An Official Publication of the American Association of Anatomists
https://www.readbyqxmd.com/read/28646444/engineering-3d-models-of-tumors-and-bone-to-understand-tumor-induced-bone-disease-and-improve-treatments
#16
REVIEW
Kristin A Kwakwa, Joseph P Vanderburgh, Scott A Guelcher, Julie A Sterling
PURPOSE OF REVIEW: Bone is a structurally unique microenvironment that presents many challenges for the development of 3D models for studying bone physiology and diseases, including cancer. As researchers continue to investigate the interactions within the bone microenvironment, the development of 3D models of bone has become critical. RECENT FINDINGS: 3D models have been developed that replicate some properties of bone, but have not fully reproduced the complex structural and cellular composition of the bone microenvironment...
June 23, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/28646443/recent-discoveries-in-monogenic-disorders-of-childhood-bone-fragility
#17
REVIEW
Riikka E Mäkitie, Anders J Kämpe, Fulya Taylan, Outi Mäkitie
PURPOSE OF REVIEW: This review summarizes our current knowledge on primary osteoporosis in children with focus on recent genetic findings. RECENT FINDINGS: Advances in genetic research, particularly next-generation sequencing, have found several genetic loci that associate with monogenic forms of inherited osteoporosis, widening the scope of primary osteoporosis beyond classical osteogenesis imperfecta. New forms of primary osteoporosis, such as those related to WNT1, PLS3, and XYLT2, have identified defects outside the extracellular matrix components and collagen-related pathways, in intracellular cascades directly affecting bone cell function...
June 23, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/28646439/alterations-in-contact-lens-fitting-parameters-following-cross-linking-in-keratoconus-patients-of-indian-ethnicity
#18
Kirti Singh, Mainak Bhattacharyya, Ritu Arora, Sonal Dangda, Ankush Mutreja
BACKGROUND: Most studies have either excluded patients using contact lens or not taken their effect while analyzing post-collagen cross-linkage (CXL) changes. This study aims to study impact of CXL on lens fit in both quantitative and qualitative manner. OBJECTIVE: To evaluate changes in CL fit post-CXL and to correlate these changes with alterations in corneal topographic parameters. STUDY DESIGN: Prospective intervention study on 20 keratoconic eyes of 14 patients (age > 18 years), with mean follow-up of 6 months...
June 23, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28646230/il-1%C3%AE-increases-asporin-expression-via-the-nf-%C3%AE%C2%BAb-p65-pathway-in-nucleus-pulposus-cells-during-intervertebral-disc-degeneration
#19
Shengjie Wang, Chao Liu, Zhongyi Sun, Peng Yan, He Liang, Kai Huang, Changwei Li, Jiwei Tian
Disc degeneration (DD) is a multifaceted chronic process that alters the structure and function of intervertebral discs. The pathophysiology of degeneration is not completely understood, but the consensus is that changes in genes encoding extracellular matrix (ECM) proteins in the disc are the leading factors contributing to DD. Asporin is an ECM protein that has been shown to be increased in degenerated intervertebral discs, but little is known about how asporin is regulated during DD. In exploring the intricate mechanism, we confirmed that asporin was abundantly increased in patients' degenerated nucleus pulposus...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646039/monocyte-adhesion-migration-and-extracellular-matrix-breakdown-is-regulated-by-integrin-%C3%AE-v%C3%AE-3-in-mycobacterium-tuberculosis-infection
#20
Sara Brilha, Riccardo Wysoczanski, Ashley M Whittington, Jon S Friedland, Joanna C Porter
In tuberculosis (TB), the innate inflammatory immune response drives tissue destruction, morbidity, and mortality. Monocytes secrete matrix metalloproteinases (MMPs), which have key roles in local tissue destruction and cavitation. We hypothesized that integrin signaling might regulate monocyte MMP secretion in pulmonary TB during cell adhesion to the extracellular matrix (ECM). Adhesion to type I collagen and fibronectin by Mycobacterium tuberculosis-stimulated monocytes increased MMP-1 gene expression by 2...
June 23, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
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