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Chiara Anna D'Amato, Rita Giovannetti, Marco Zannotti, Elena Rommozzi, Marco Minicucci, Roberto Gunnella, Andrea Di Cicco
The effect of surface modification using ascorbic acid as a surface modifier of nano-TiO₂ heterogeneous photocatalyst was studied. The preparation of supported photocatalyst was made by a specific paste containing ascorbic acid modified TiO₂ nanoparticles used to cover Polypropylene as a support material. The obtained heterogeneous photocatalyst was thoroughly characterized (scanning electron microscope (SEM), RAMAN, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), and Diffuse Reflectance Spectra (DRS) and successfully applied in the visible light photodegradation of Alizarin Red S in water solutions...
August 7, 2018: Nanomaterials
Bingbing Yan, Kewen Wei, Lipeng Hou, Taiqiang Dai, Yongchun Gu, Xinyu Qiu, Jiangwei Chen, Yuan Feng, Haode Cheng, Zhuo Yu, Yizhe Zhang, Hongmei Zhang, Dehua Li
BACKGROUND Periodontal ligament stem cells (PDLSCs) possess characteristics of multi-potential differentiation and immuno-modulation, and PDLSCs-mediated periodontal tissue regeneration is regarded as a hopeful method for periodontitis treatment. Recent studies demonstrated that RIP3 and caspase8 regulate bacteria-induced innate immune response and programmed necrosis, which is also called necroptosis. This study aimed to determine the role of the RIP3/Caspase8 signal pathway on necroptosis of PDLSCs under the inflammatory microenvironment, both [i]in vitro[/i] and [i]in vivo[/i]...
July 29, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Nurizzati Mohd Daud, Rania Hussein Al-Ashwal, Mohammed Rafiq Abdul Kadir, Syafiqah Saidin
Immobilization of chlorhexidine (CHX) on stainless steel 316L (SS316L), assisted by a polydopamine film as an intermediate layer is projected as an approach in combating infection while aiding bone regeneration for coating development on orthopedic and dental implants. This study aimed to investigate the ability of CHX coating to promote apatite layer, osteoblast cells viability, adhesion, osteogenic differentiation and mineralization. Stainless steel 316L disks were pre-treated, grafted with a polydopamine film and immobilized with different concentrations of CHX (10-30mM)...
July 23, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
Louise M Burke, Graeme L Close, Bronwen Lundy, Martin Mooses, James P Morton, Adam S Tenforde
Low energy availability (LEA) is a key element of the Female Athlete Triad. Causes of LEA include failure to match high exercise energy expenditure (unintentional) or pathological behaviors of disordered eating (compulsive) and overzealous weight control programs (misguided but intentional). Recognition of such scenarios in male athletes contributed to the pronouncement of the more inclusive Relative Energy Deficiency in Sport (RED-S) syndrome. This commentary describes the insights and experience of the current group of authors around the apparently heightened risk of LEA in some populations of male athletes: road cyclists, rowers (lightweight and open weight), athletes in combat sports, distance runners, and jockeys...
July 1, 2018: International Journal of Sport Nutrition and Exercise Metabolism
Anja Trillhaase, Undine Haferkamp, Alexandra Rangnau, Marlon Märtens, Beatrice Schmidt, Michaela Trilck, Philip Seibler, Redouane Aherrahrou, Jeanette Erdmann, Zouhair Aherrahrou
Vascular calcification displays a major cause of death worldwide, which involve mainly vascular smooth muscle cells (VSMCs). Since 2007, there are increasing numbers of protocols to obtain different cell types from human induced-pluripotent stem cells (iPSCs), however a protocol for calcification is missing. Few protocols exist today for the differentiation of iPSCs towards VSMCs and none are known for their calcification. Here we present a protocol for the calcification of iPSC-derived VSMCs. We successfully differentiated iPSCs into VSMCs based on a modified protocol...
July 17, 2018: Stem Cell Research
Lukasz Bozycki, Kacper Łukasiewicz, Paweł Matryba, Slawomir Pikula
BACKGROUND: Duchenne muscular dystrophy (DMD) is a fatal, X-linked genetic disorder. Although DMD is the most common form of muscular dystrophy, only two FDA-approved drugs were developed to delay its progression. In order to assess therapies for treating DMD, several murine models have recently been introduced. As the wide variety of murine models enlighten mechanisms underlying DMD pathology, the question on how to monitor the progression of the disease within the entire musculoskeletal system still remains to be answered...
July 19, 2018: Skeletal Muscle
Maorui Zhang, Yong Li, Pengcheng Rao, Kui Huang, Daowen Luo, Xiaoxiao Cai, Jingang Xiao
OBJECTIVES: Diabetes mellitus-related osteoporosis is caused by the imbalance between bone absorption and bone formation. Advanced glycation end products (AGEs) are considered a cause of diabetic osteoporosis. Although adipose-derived stem cells (ASCs) are promising adult stem cells in bone tissue regeneration, the ability of osteogenesis of ASCs in diabetic environment needs to explore. This study aimed to investigate the influence of AGEs on the osteogenic potential of ASCs and to explore the signalling pathways involved in its effect...
July 16, 2018: Cell Proliferation
Pragati Kushwaha, Ashish Kumar Tripathi, Sampa Gupta, Priyanka Kothari, Akanksha Upadhyay, Naseer Ahmad, Tanuj Sharma, M I Siddiqi, Ritu Trivedi, Koneni V Sashidhara
Twenty-four novel benzofuran-pyran derivatives were synthesized and evaluated for their anti-osteoporotic activity in primary cultures of rat calvarial osteoblasts in vitro. Among all the compounds screened for the alkaline phosphatase activity, three compounds 4e, 4j and 4k showed potent activity at picomolar concentrations in osteoblast differentiating stimulation. Additionally, these compounds were found effective in mineralization, assessed by alizarin red-S staining assay. Compounds were again validated through a series of other in vitro experiments...
June 28, 2018: European Journal of Medicinal Chemistry
Zi-Li Yu, Bin-Fang Jiao, Zu-Bing Li
Lysophosphatidic acid (LPA), a bioactive lipid molecule, has recently emerged as physiological and pathophysiological regulator in skeletal biology. Here we evaluate the effects of LPA on bone formation in vivo in murine femoral critical defect model. Primary femoral osteoblasts were isolated and treated with osteogenic induction conditional media supplemented with 20 μ M LPA or LPA analogue. Mineralized nodules were visualized by Alizarin Red S staining. Forty-five C57BL/6 mice underwent unilateral osteotomy...
2018: BioMed Research International
Lukasz Bozycki, Magdalena Komiazyk, Saida Mebarek, Rene Buchet, Slawomir Pikula, Agnieszka Strzelecka-Kiliszek
This video presents the use of transmission electron microscopy with energy dispersive X-ray microanalysis (TEM-EDX) to compare the state of minerals in vesicles released by two human bone cell lines: hFOB 1.19 and Saos-2. These cell lines, after treatment with ascorbic acid (AA) and β-glycerophosphate (β-GP), undergo complete osteogenic transdifferentiation from proliferation to mineralization and produce matrix vesicles (MVs) that trigger apatite nucleation in the extracellular matrix (ECM). Based on Alizarin Red-S (AR-S) staining and analysis of the composition of minerals in cell lysates using ultraviolet (UV) light or in vesicles using TEM imaging followed by EDX quantitation and ion mapping, we can infer that osteosarcoma Saos-2 and osteoblastic hFOB 1...
June 24, 2018: Journal of Visualized Experiments: JoVE
Q Qiao, Y L Song, F L Li
Objective: To evaluate the effect of semaphorin 3A (Sema3A) pre-treated bone marrow mesenchymal stem cells (BMSC) sheets on new bone formation in type 2 diabetes mellitus rats. Methods: Type 2 diabetes mellitus (T2DM) were induced by injection of streptozotocin, and the BMSC were isolated, controlled, identified and induced into cell sheets. Fifteen T2DM rats were randomly divided into control, sheets and Sema3A-sheets group and the calvarial critical size defect (CSD) model of rats were established. The defect zone of rats from control group were implanted with bone powder...
May 9, 2018: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
Chengwu Zhu, Chuqi Jiang, Shou Chen, Ruiqiong Mei, Xin Wang, Jun Cao, Li Ma, Bo Zhou, Qiuping Wei, Guangqi Ouyang, Zhiming Yu, Kechao Zhou
Textile wastewater is characterized by high toxicity, complex structure, and resistance to biodegradation. Therefore, advanced oxidation technologies have received extensive attention. However, it is usually difficult to achieve a desired degradation effect using a single technology. The combination of various advanced oxidation technologies is an important way to achieve efficient degradation of organic wastewater. The present investigation was focused on ultrasound enhanced electrochemical oxidation (US-EO) of typical anthracene Alizarin Red S dye on a boron doped diamond anode...
June 22, 2018: Chemosphere
Volker M Betz, Bin Ren, Carolin Messmer, Volkmar Jansson, Oliver B Betz, Peter E Müller
BACKGROUND: Bone morphogenetic protein (BMP)-2 gene-activated muscle tissue fragments can regenerate large bone defects in preclinical animal models. The use of tissue fragments instead of isolated cells expedites gene-enhanced tissue engineering and may increase the possibility of clinical translation. The present in vitro study investigated whether the osteoinductive effect of BMP-2 on muscle tissue fragments can be enhanced using the heterodimers BMP-2/6 or BMP-2/7. METHODS: Skeletal muscle tissue fragments from rats were cultured in vitro for up to 20 days in normal medium, osteogenic medium or osteogenic medium supplemented with either a low (50 ng/ml) or high (200 ng/ml) concentration of recombinant human BMP-2, BMP-2/6 or BMP-2/7...
June 28, 2018: Journal of Gene Medicine
Xiaoxiao Liu, Fangying Cao, Shuang Liu, Yuhong Mi, Jinghua Liu
Vascular calcification is extremely common and associated with major adverse cardiovascular events. Fibroblast growth factor (FGF) 21 has been identified as a potent metabolic regulator and a protector of the cardiovascular system. In this study, we aimed to investigate the effect of FGF21 on calcification of vascular smooth muscle cell (VSMC) and its mechanism. FGF21 inhibited beta-glycerophosphate (BGP) induced mineralization in VSMCs as determined by calcium concentration and Alizarin Red S. FGF21 suppressed BGP-induced BMP2/Smad signaling pathway components as well as osteoblast differentiation markers...
June 25, 2018: Biochemical and Biophysical Research Communications
Shuai Chen, Haifeng Zhu, Gangliang Wang, Ziang Xie, Jiying Wang, Jian Chen
PURPOSE: To evaluate the effects of leptin/leptin receptor (LepR) combined with mechanical stress on the development of ossification of the posterior longitudinal ligament (OPLL), which is a disease characterized by ectopic bone formation of the posterior longitudinal ligament (PLL) and can lead to radiculopathy and myelopathy. METHODS: Six human samples of the PLL were analyzed for the expression of leptin and LepR by RT-PCR and western blotting. PLL cells were stimulated with leptin and mechanical stress delivered via a Flexcell tension system, and osteogenic differentiation was evaluated by RT-PCR and western blotting analysis of osteogenic marker expression as well as by alkaline phosphatase (ALP) staining and alizarin red S staining...
June 16, 2018: European Spine Journal
Cheng Yuan, Xiaoli Gou, Jiang Deng, Zhijun Dong, Peng Ye, Zhenming Hu
BACKGROUNDS: Adipose derived stem cells (ADSCs) could undergo osteogenesis via focal adhesion kinase (FAK) and bone morphogenetic protein (BMP) 9 signals, both of which could affect Wnt-β-catenin signal, a signal pathway closely related to ADSCs osteogenesis. It's still enigma whether FAK and BMP-9 contribute to osteogenesis. Here, we examined the effect of FAK on BMP9-inducedosteogenic differentiation, unveiled the possible molecular mechanism underling this process. METHODS: In the present study, ADSCs were isolated and purified, and cells of passage 3 underwent virus mediated transfection to prepare ADSCs with stable FAK shRNA expression...
September 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
L Tsiklauri, J Werner, M Kampschulte, K W Frommer, L Berninger, M Irrgang, K Glenske, D Hose, T El Khassawna, J Pons-Kühnemann, S Rehart, S Wenisch, U Müller-Ladner, E Neumann
OBJECTIVES: Age-related bone loss is associated with bone marrow adiposity. Adipokines (e.g., visfatin, resistin, leptin) are adipocyte-derived factors with immunomodulatory properties and might influence differentiation of bone marrow-derived mesenchymal stem cells (MSC) in osteoarthritis (OA) and osteoporosis (OP). Thus, the presence of adipokines and MMPs in bone marrow and their effects on MSC differentiation were analyzed. METHODS: MSC and Ribonucleic acid (RNA) were isolated from femoral heads after hip replacement surgery of OA or osteoporotic femoral neck fracture (FF) patients...
June 14, 2018: Osteoarthritis and Cartilage
Zengfa Huang, Cheng Cheng, Jing Wang, Xianzhe Liu, Hui Wei, Yu Han, Shuhua Yang, Xiang Wang
Osteoporosis has become one of the most serious public health problems. Icariin, miR-153 and Runt-related transcription factor 2 (Runx2) have been demonstrated to regulate cell proliferation and differentiation in multiple cells. The aim of the present experiments was to investigate the potential mechanism underlying osteoblast differentiation and cell proliferation of MC3T3-E1 cells treated with icariin. Cell Counting kit-8, alkaline phosphatase (ALP) activity and alizarin red S assays, as well as reverse transcription-quantitative polymerase chain reaction and western blot analysis, were performed to examine whether icariin promoted osteoblast differentiation and cell proliferation in MC3T3-E1 cells...
June 2018: Experimental and Therapeutic Medicine
Fei-Fei Li, Bo Zhang, Ji-Hong Cui, Fu-Lin Chen, Yin Ding, Xue Feng
Mechanical load application promotes bone formation, while reduced load leads to bone loss. However, the underlying mechanisms that regulate new bone formation are not fully understood. Wnt/β‑catenin signaling has an important role in bone formation, bone growth and remodeling. The aim of the present study was to investigate whether mechanical stimuli regulated bone formation through the Wnt/β‑catenin signaling pathway. Saos‑2 osteoblastic cells were subjected to mechanical strain using a Flexcell strain loading system...
August 2018: Molecular Medicine Reports
Shuangshuang Wang, Siwang Hu, Jian Wang, Yahui Liu, Ruochi Zhao, Maoqing Tong, Hanbin Cui, Nan Wu, Xiaomin Chen
BACKGROUND: Arterial calcification is associated with cardiovascular disease as a complication of advanced atherosclerosis and is a significant contributor to cardiovascular morbidity and mortality. Osteoblastic differentiation of vascular smooth muscle cells (VSMCs) plays an important role in arterial calcification and is characterized by cellular necrosis, inflammation, and lipoprotein and phospholipid complexes, especially in atherosclerotic calcification. The conditioned medium from bone marrow-derived mesenchymal stem cells (MSC-CM) is well known as a rich source of autologous cytokines and is universally used for tissue regeneration in current clinical medicine...
June 13, 2018: Stem Cell Research & Therapy
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