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Osteopontin

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https://www.readbyqxmd.com/read/27922190/clc-3-promotes-osteogenic-differentiation-in-mc3t3-e1-cell-after-dynamic-compression
#1
Dawei Wang, Hao Wang, Feng Gao, Kun Wang, Fusheng Dong
ClC-3 chloride channel has been proved to have a relationship with the expression of osteogenic markers during osteogenesis, persistent static compression can upregulate the expression of ClC-3 and regulate osteodifferentiation in osteoblasts. However, there was no study about the relationship between the expression of ClC-3 and osteodifferentiation after dynamic compression. In this study, we applied dynamic compression on MC3T3-E1 cells to detect the expression of ClC-3, runt-related transcription factor 2 (Runx2), bone morphogenic protein-2 (BMP-2), osteopontin (OPN), nuclear-associated antigen Ki67 (Ki67) and proliferating cell nuclear antigen (PCNA) in biopress system, then we investigated the expression of these genes after dynamic compression with Chlorotoxin (specific ClC-3 chloride channel inhibitor) added...
December 6, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27918140/investigation-of-intrinsically-disordered-proteins-through-exchange-with-hyperpolarized-water
#2
Dennis Kurzbach, Estel Canet, Andrea G Flamm, Aditya Jhajharia, Emmanuelle M M Weber, Robert Konrat, Geoffrey Bodenhausen
Hyperpolarized water can selectively enhance NMR signals of rapidly exchanging protons in osteopontin (OPN), a metastasis-associated intrinsically disordered protein (IDP), at near-physiological pH and temperature. The transfer of magnetization from hyperpolarized water is limited to solvent-exposed residues and therefore selectively enhances signals in (1) H-(15) N correlation spectra. Binding to the polysaccharide heparin was found to induce the unfolding of preformed structural elements in OPN.
December 5, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27916082/-effects-of-ammonium-pyrrolidine-dithiocarbamate-pdtc-on-osteopontin-expression-and-autophagy-in-tubular-cells-in-streptozotocin-induced-diabetic-nephropathy-rat
#3
S Gao, J Y Jia, T K Yan, Y M Yu, W Y Shang, L Wei, Z F Zheng, P Fang, B C Chang, S Lin
Objective: To investigate the effects of ammonium pyrrolidine dithiocarbamate (PDTC) on tubulointerstitial inflammatory molecules and autophagy in diabetic nephropathy (DN) rats. Methods: Twenty-four male Sprague-Dawley rats were assigned to DN group (n=6) and DN+ PDTC group (n=6, PDTC, ip, 100 mg·kg(-1)·d(-1)), all received streptozotocin (STZ) 60 mg/kg intraperitoneally, and the other 12 rats were randomly divided into control group (n=6) and PDTC group (n=6). At the end of 12 weeks, after serum creatine (Scr) and 24-hour urinary protein were determined, rats were sacrificed to determined the renal pathological damages and the changes of nuclear factor (NF)-κB p65, p62, osteopontin (OPN), microtubule associated protein 1 light chain 3 (LC3)-Ⅱ/LC3-Ⅰ, nuclear p-NF-κB p65 by immunohistological stainning and Western blot, and ultrastructural changes of autophagic process was observed by electron microscopy (EM)...
November 29, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27904658/circulating-microparticles-enhanced-rat-vascular-wall-remodeling-following-endothelial-denudation
#4
Fan-Yen Lee, Hung-I Lu, Han-Tan Chai, Jiunn-Jye Sheu, Yi-Ling Chen, Tein-Hung Huang, Gour-Shenq Kao, Sheng-Yi Chen, Sheng-Ying Chung, Pei-Hsun Sung, Hsueh-Wen Chang, Mel S Lee, Hon-Kan Yip
This study tested the hypothesis that circulating microparticles (MPs) exacerbated vascular wall (VW) remodeling after endothelial denudation by 0.014 wire in a rat model. Adult male Sprague Dawley rats (n = 40) were equally categorized into group 1 [sham-control (SC); 3.0 mL saline intravenous injection], group 2 [SC + intravenous MPs (1.0 × 10(7)) derived from patients with carotid artery stenosis (CAS)], group 3 [femoral arterial endothelial denudation (FAED)], group 4 (FAED + MPs derived from healthy subjects), and group 5 (FAED + CAS-derived MPs)...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27900257/does-osteopontin-induce-adipose-tissue-inflammation-by-local-macrophage-proliferation
#5
Florian Kahles, Hannes M Findeisen
No abstract text is available yet for this article.
December 2016: Molecular Metabolism
https://www.readbyqxmd.com/read/27900019/the-relationship-between-tumor-volume-changes-and-serial-plasma-osteopontin-detection-during-radical-radiotherapy-of-non-small-cell-lung-cancer
#6
Christian Ostheimer, Franziska Schweyer, Thomas Reese, Matthias Bache, Dirk Vordermark
The prognostic quality of increased osteopontin (OPN) plasma levels has been demonstrated for the chemotherapy and surgery of lung cancer. There is also evidence in the literature that tumor volume impacts prognosis in definitive radiotherapy (RT) of (lung) cancer. We previously demonstrated that elevated plasma levels of OPN before, and increasing OPN plasma levels after RT significantly correlate with survival and outcome after curative-intent RT of non-small-cell lung cancer (NSCLC). Tumor volume was also associated with prognosis...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27899994/targeting-of-the-leukemia-microenvironment-by-c-rgdfv-overcomes-the-resistance-to-chemotherapy-in-acute-myeloid-leukemia-in-biomimetic-polystyrene-scaffolds
#7
Zhao-Hua Shen, Dong-Feng Zeng, Xiao-Yan Wang, Ying-Ying Ma, Xi Zhang, Pei-Yan Kong
The bone marrow microenvironment provides a relative sanctuary from cytotoxic drugs for leukemia cells. The present niche models concentrate on a two-dimensional (2D) co-culture system in vitro, which does not imitate the in vivo environment, while the 3D scaffolds are more reflective of this. Osteopontin (Opn) secreted by bone marrow osteoblasts, may participate in protecting leukemia cells from apoptosis by binding to its receptor αvβ3, which can be expressed on the surface of the leukemia MV4-11 cell line...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27895437/isotretinoin-increased-carotid-intima-media-thickness-in-acne-patients
#8
A Saklamaz, B Uyar, M Yalcin, H Cengiz
BACKGROUND: Isotretinoin (Iso) in acne treatment may cause dyslipidemia and increase in liver enzymes. Moreover, its effect on lipid and glucose metabolism may induce atherosclerotic complications. The aim of this study was to evaluate carotid intima-media thickness (CIMT), osteopontin (OPN), lipid, high sensitive C-reaktive protein (hs-CRP) levels, and insulin resistance (HOMA-IR) in acne patients before and after Iso treatment. MATERIALS: Twenty-one acne patients were treated with Iso (0...
January 2016: Hippokratia
https://www.readbyqxmd.com/read/27893751/25-hydroxy-and-1%C3%AE-25-dihydroxycholecalciferol-have-greater-potencies-than-25-hydroxy-and-1%C3%AE-25-dihydroxyergocalciferol-in-modulating-cultured-human-and-mouse-osteoblast-activities
#9
Allahdad Zarei, Philippa A Hulley, Afsie Sabokbar, M Kassim Javaid, Alireza Morovat
Despite differences in the phamacokinetics of 25-hydroxycholecalciferol (25(OH)D3) and 25-hydroxyergocalciferol (25(OH)D2) in man, the effects of these and their 1α-hydroxylated forms (1,25(OH)2D3 and 1,25(OH)2D2) on cellular activity of vitamin D-responsive cells have hardly been compared. We studied differences in the effects of these metabolites on cell number, gene transcription, protein expression and mineralisation of cultured human bone marrow-derived stromal cells (hBMSC) and rapidly mineralising mouse 2T3 osteoblasts...
2016: PloS One
https://www.readbyqxmd.com/read/27890929/extended-time-lapse-in-vivo-imaging-of-tibia-bone-marrow-to-visualize-dynamic-hematopoietic-stem-cell-engraftment
#10
S Kim, L Lin, G A J Brown, K Hosaka, E W Scott
Homing, engraftment and proliferation of hematopoietic stem/progenitor cell (HSC/HPCs) are crucial steps required for success of a bone marrow transplant. Observation of these critical events is limited by the opaque nature of bone. Here we demonstrate how individual HSCs engraft in long bones by thinning one side of the tibia for direct and unbiased observation. Intravital imaging enabled detailed visualization of single Sca-1(+), c-Kit(+), Lineage(-) (SKL) cell migration to bone marrow niches and subsequent proliferation to reconstitute hematopoiesis...
November 28, 2016: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/27888617/suppression-of-osteopontin-inhibits-chemically-induced-hepatic-carcinogenesis-by-induction-of-apoptosis-in-mice
#11
Su-Hyung Lee, Jun-Won Park, Sang-Ho Woo, Du-Min Go, Hyo-Jung Kwon, Ja-June Jang, Dae-Yong Kim
Previous clinical reports have found elevated osteopontin (OPN) levels in tumor tissues to be indicative of greater malignancy in human hepatocellular carcinoma (HCC). However, the role of OPN on carcinogenesis and its underlying mechanism remain unclear. In the present study, we investigated the oncogenic role of OPN in diethylnitrosamine (DEN)-induced hepatic carcinogenesis in mice. The overall incidence of hepatic tumors at 36 weeks was significantly lower in OPN knockout (KO) mice than in wild-type (WT) mice...
November 23, 2016: Oncotarget
https://www.readbyqxmd.com/read/27886205/a-subset-of-malignant-mesothelioma-tumors-retain-osteogenic-potential
#12
S M Lansley, B Pedersen, C Robinson, R G Searles, G Sterrett, I van Bruggen, R A Lake, S E Mutsaers, C M Prêle
Malignant mesothelioma (MM) is an aggressive serosal tumor associated with asbestos exposure. We previously demonstrated that mesothelial cells differentiate into cells of different mesenchymal lineages and hypothesize that osseous tissue observed in a subset of MM patients is due to local differentiation of MM cells. In this study, the capacity of human and mouse MM cells to differentiate into osteoblast-like cells was determined in vitro using a functional model of bone nodule formation and in vivo using an established model of MM...
November 25, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27885328/preparative-purification-of-bioactive-compounds-from-flos-chrysanthemi-indici-and-evaluation-of-its-antiosteoporosis-effect
#13
Jia Li, Xiaosheng Lin, Yuping Zhang, Weicai Liu, Xiaohui Mi, Jiquan Zhang, Jiansheng Su
To understand the material basis and underlying molecular machinery of antiosteoporosis activity of the Flos Chrysanthemi Indici (FCI), the consequences of ethanol extract on the bone loss in mice induced due to ovariectomy (OVX) was evaluated. Also, the antiosteoporosis fraction obtained from the FCI ethanol extract was isolated and purified using a preparative high-speed countercurrent chromatography (HSCCC). The in vitro impact of the compounds was investigated on osteoblast proliferation and differentiation...
2016: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/27884786/osteopontin-and-the-dento-osseous-pathobiology-of-x-linked-hypophosphatemia
#14
Tchilalo Boukpessi, Betty Hoac, Benjamin R Coyac, Thibaut Leger, Camille Garcia, Philippe Wicart, Michael P Whyte, Francis H Glorieux, Agnès Linglart, Catherine Chaussain, Marc D McKee
Seven young patients with X-linked hypophosphatemia (XLH, having inactivating PHEX mutations) were discovered to accumulate osteopontin (OPN) at the sites of defective bone mineralization near osteocytes - the so-called hallmark periosteocytic (lacunar) "halos" of XLH. OPN was also localized in the pericanalicular matrix extending beyond the osteocyte lacunae, as well as in the hypomineralized matrix of tooth dentin. OPN, a potent inhibitor of mineralization normally degraded by PHEX, is a member of a family of acidic, phosphorylated, calcium-binding, extracellular matrix proteins known to regulate dental, skeletal, and pathologic mineralization...
November 21, 2016: Bone
https://www.readbyqxmd.com/read/27882184/phosphorylation-of-osteopontin-has-proapoptotic-and-proinflammatory-effects-on-human-knee-osteoarthritis-chondrocytes
#15
Shu-Guang Gao, Yang Yu, Chao Zeng, Shi-Tao Lu, Jian Tian, Chao Cheng, Liang-Jun Li, Guang-Hua Lei
The aim of the present study was to investigate the effects of phosphorylated osteopontin (p-OPN) on apoptosis and pro-inflammatory cytokine expression in human knee osteoarthritis (OA) chondrocytes. Human knee OA chondrocytes obtained from patients who underwent total knee arthroplasty were treated with p-OPN, OPN or buffer. Reverse transcription quantitative-polymerase chain reaction (RT-qPCR) and western blot analysis were used to assess the expression levels of proinflammatory factors, including interleukin (IL)-1β, tumor necrosis factor (TNF)-α, IL-6 and nuclear factor (NF)-κB...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27881195/the-involvement-of-runx2-and-sparc-genes-in-the-bacterial-chondronecrosis-with-osteomyelitis-in-broilers
#16
E Paludo, A M G Ibelli, J O Peixoto, F C Tavernari, C A V Lima-Rosa, J R C Pandolfi, M C Ledur
Economic losses due to an increase of leg disorders in broilers have become a major concern of the poultry industry. Despite the efforts to reduce skeletal abnormalities in chickens, insufficient progress has been made. Bacterial chondronecrosis with osteomyelitis (BCO) is one of the main disorders that affect bone integrity in broilers. However, the genetic pathways and genes involved in most bone problems, including BCO, remains unclear. In this study, femoral samples from male broilers with 45 days of age affected or not with BCO were used to compare the relative expression with a reverse transcription real time PCR approach of 13 candidate genes: SPP1 (osteopontin), TNFRSF11B (osteoprotegerin), SPARC (osteonectin), CALB1 (calbidin 1), CALM (Calmodulin 2), IBSP (sialoprotein), COL1A2 (collagen, type I, α 2), BMP2 (bone morphogenetic protein 2), BMP3 (bone morphogenetic protein 3), RANKL (κ-B nuclear factor ligand), SMAD1 (SMAD family member 1), LEPR (leptin receptor) and RUNX2 (related transcription factor Runt 2)...
November 24, 2016: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/27877865/three-dimensional-printed-macroporous-polylactic-acid-hydroxyapatite-composite-scaffolds-for-promoting-bone-formation-in-a-critical-size-rat-calvarial-defect-model
#17
Haifeng Zhang, Xiyuan Mao, Zijing Du, Wenbo Jiang, Xiuguo Han, Danyang Zhao, Dong Han, Qingfeng Li
We have explored the applicability of printed scaffold by comparing osteogenic ability and biodegradation property of three resorbable biomaterials. A polylactic acid/hydroxyapatite (PLA/HA) composite with a pore size of 500 μm and 60% porosity was fabricated by three-dimensional printing. Three-dimensional printed PLA/HA, β-tricalcium phosphate (β-TCP) and partially demineralized bone matrix (DBM) seeded with bone marrow stromal cells (BMSCs) were evaluated by cell adhesion, proliferation, alkaline phosphatase activity and osteogenic gene expression of osteopontin (OPN) and collagen type I (COL-1)...
2016: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/27876212/alteration-in-oxidative-nitrosative-imbalance-histochemical-expression-of-osteopontin-and-antiurolithiatic-efficacy-of-xanthium-strumarium-l-in-ethylene-glycol-induced-urolithiasis
#18
Padma Nibash Panigrahi, Sahadeb Dey, Monalisa Sahoo, Shyam Sundar Choudhary, Sumit Mahajan
Xanthium strumarium has traditionally been used in the treatment of urolitiasis especially by the rural people in India, but its antiurolithiatic efficacy was not explored scientifically till now. Therefore, the present study was designed to validate the ethnic practice scientifically, and explore the possible antiurolithiatic effect to rationalize its medicinal use. Urolitiasis was induced in hyperoxaluric rat model by giving 0.75% ethylene glycol (EG) for 28days along with 1% ammonium chloride (AC) for first 14days...
November 18, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27874039/effects-of-light-emitting-diode-irradiation-on-the-osteogenesis-of-human-umbilical-cord-mesenchymal-stem-cells-in-vitro
#19
Dazhi Yang, Weihong Yi, Ertian Wang, Min Wang
The aim of this study was to examine the effects of light-emitting diode (LED) photobiomodulation therapy on the proliferation and differentiation of human umbilical cord mesenchymal stem cells (hUMSCs) cultured in osteogenic differentiation medium. HUMSCs were irradiated with an LED light at 620 nm and 2 J/cm(2) and monitored for cell proliferation and osteogenic differentiation activity. The experiment involved four groups of cells: the control group; the osteogenic group (osteo group); the LED group; the osteogenic + LED group (LED + osteo group)...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27868262/adipocytes-enhance-expression-of-osteoclast-adhesion-related-molecules-through-the-cxcl12-cxcr4-signalling-pathway
#20
Tingting Luo, Hongrui Liu, Wei Feng, Di Liu, Juan Du, Jing Sun, Wei Wang, Xiuchun Han, Jie Guo, Norio Amizuka, Xianqi Li, Minqi Li
OBJECTIVES: The purpose of this study was to investigate effects of adipocytes on osteoclast adhesion-related molecules. MATERIALS AND METHODS: ST2 cells, a cloned stromal cell line from mouse bone marrow, able to differentiate into adipocytes, were cultured in serum-free α-MEM which was then collected to be used as adipocyte-conditioned medium (ADIPO CM). RAW264.7 cells were cultured in ADIPO CM in the presence of RANKL, and bone marrow-derived macrophages were cultured in ADIPO CM in the presence of RANKL and macrophage-colony stimulating factor to induce osteoclast differentiation...
November 21, 2016: Cell Proliferation
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