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https://www.readbyqxmd.com/read/29786151/time-dependent-loss-of-trabecular-bone-in-human-tibial-plateau-fractures
#1
Lucian Bogdan Solomon, David Kitchen, Paul Hamill Anderson, Dongqing Yang, Yolandi Starczak, Masakazu Kogawa, Egon Perilli, Peter Jonathan Smitham, Mark Sean Rickman, Dominic Thewlis, Gerald James Atkins
We investigated if time between injury and surgery affects cancellous bone properties in patients suffering tibial plateau fractures (TPF), in terms of structural integrity and gene expression controlling bone loss. A cohort of 29 TPF, operated 1-17 days post-injury, had biopsies from the fracture and an equivalent contralateral limb site, at surgery. Samples were assessed using micro-computed tomography and real-time RT-PCR analysis for the expression of genes known to be involved in bone remodeling and fracture healing...
May 22, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29785076/role-of-osteoprotegerin-receptor-activator-of-nuclear-factor-kappa-b-receptor-activator-of-nuclear-factor-kappa-b-ligand-axis-in-nonalcoholic-fatty-liver-disease
#2
REVIEW
Lucia Pacifico, Gian Marco Andreoli, Miriam D'Avanzo, Delia De Mitri, Pasquale Pierimarchi
Concomitantly with the increase in the prevalences of overweight/obesity, nonalcoholic fatty liver disease (NAFLD) has worldwide become the main cause of chronic liver disease in both adults and children. Patients with fatty liver display features of metabolic syndrome (MetS), like insulin resistance (IR), glucose intolerance, hypertension and dyslipidemia. Recently, epidemiological studies have linked obesity, MetS, and NAFLD to decreased bone mineral density and osteoporosis, highlighting an intricate interplay among bone, adipose tissue, and liver...
May 21, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29782843/role-of-nutritional-vitamin-d-in-osteoporosis-treatment
#3
REVIEW
Yi-Chou Hou, Chia-Chao Wu, Min-Tser Liao, Jia-Fwu Shyu, Chi-Feng Hung, Tzung-Hai Yen, Chien-Lin Lu, Kuo-Cheng Lu
Osteoporosis is a systemic skeletal disorder characterized by a decrease in bone mass and microarchitectural deterioration of bone tissue. The World Health Organization has defined osteoporosis as a decrease in bone mass (50%) and bony quality (50%). Vitamin D, a steroid hormone, is crucial for skeletal health and in mineral metabolism. Its direct action on osteoblasts and osteoclasts and interaction with nonskeletal tissues help in maintaining a balance between bone turnover and bone growth. Vitamin D affects the activity of osteoblasts, osteoclasts, and osteocytes, suggesting that it affects bone formation, bone resorption, and bone quality...
May 18, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29777507/rankl-expression-is-increased-in-circulating-mononuclear-cells-of-patients-with-calcific-aortic-stenosis
#4
Marcello Rattazzi, Elisabetta Faggin, Elisa Bertacco, Roberta Buso, Massimo Puato, Mario Plebani, Martina Zaninotto, Davide Condotta, Giacomo Zoppellaro, Leopoldo Pagliani, Giuseppe Tarantini, Sabino Iliceto, Elisa Covolo, Giuseppe Faggian, Francesco Onorati, Mikhail Dodonov, Alessandro Daniotti, Paola Pantano, Zoran Olivari, Giovanni Benfari, Paolo Pauletto
We aimed to investigate whether the expression of the OPG/RANK/RANKL triad in peripheral blood mononuclear cells (PBMC) and circulating levels of markers of ectopic mineralization (OPG, FGF-23, PPi) are modified in patients with calcific aortic valve disease (CAVD). We found that patients affected by CAVD (n = 50) had significantly higher circulating levels of OPG as compared to control individuals (p = 0.003). No differences between the two groups were found in FGF-23 and PPi levels. RANKL expression was higher in the PBMC from CAVD patients (p = 0...
May 17, 2018: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/29774992/interleukin-17a-promotes-osteogenic-differentiation-by-increasing-opg-rankl-ratio-in-stem-cells-from-human-exfoliated-deciduous-teeth-shed
#5
Alphonsa-Sebastian Alphy, Thirumulu-Ponnuraj Kannan, Mohd-Nor Norazmi, Asma-Abdullah Nurul
Stem cells derived from human exfoliated deciduous teeth (SHED) represent a promising cell source for bone tissue regeneration. The present study evaluated the effects of interleukin 17A (IL-17A) on the osteogenic differentiation of SHED. SHED were cultured in complete alpha minimum essential medium supplemented with osteoinducing reagents and treated with recombinant IL-17A. The cells were quantitatively analyzed for proliferative activity by MTS assay, cell markers expression as well as apoptotic activity by flow cytometry...
May 18, 2018: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29772836/soybean-hop-alleviates-estrogen-deficiency-related-bone-loss-and-metabolic-dysfunction-in-ovariectomized-rats-fed-a-high-fat-diet
#6
Dasom Noh, Yeni Lim, Hansol Lee, Hyejin Kim, Oran Kwon
Soybeans and hops have been traditionally used as a natural estrogen replacement therapy and their major active ingredients, isoflavones and prenylflavanones, are known to have estrogenic/antiestrogenic effects depending on the target organ. However, their potential benefits are still subject to controversies. The present study investigated the dual effect of soy isoflavones plus hop prenylflavanones (Soy-Hop) on bone loss and metabolic dysfunction under estrogen deficient condition. Rats were sham-operated ( n = 10) or ovariectomized (OVX; n = 40) and then fed a high-fat diet (HFD) to develop hyperlipidemia in OVX rats within the experimental period of 8 weeks...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29767789/effects-of-tannic-acid-extract-on-performance-and-intestinal-health-of-broiler-chickens-following-coccidiosis-vaccination-and-or-a-mixed-species-eimeria-challenge
#7
R M Tonda, J K Rubach, B S Lumpkins, G F Mathis, M J Poss
Two experiments were conducted to investigate the effects of tannic acid extract (TAE) formulations on the performance and intestinal health of male Cobb × Cobb 500 broilers exposed to coccidiosis. In the first experiment, 320 broiler chicks were randomly assigned to 5 treatments with 8 replicates. Treatments included non-medicated, uninfected (NC); non-medicated, infected (PC); salinomycin (SAL, 66 mg/kg); tannic acid (TA, 0.5 g/kg) and TAE (TAE, 0.5 g/kg). On d 14, all groups (except NC) were orally inoculated with Eimeria acervulina, E...
May 15, 2018: Poultry Science
https://www.readbyqxmd.com/read/29764701/a-combination-of-skeletal-deformations-of-the-dorsal-mandible-and-temporomandibular-region-detected-in-orthopantomograms-of-patients-with-neurofibromatosis-type-1-indicates-an-associated-ipsilateral-plexiform-neurofibroma
#8
Reinhard E Friedrich, Anika Reul
PURPOSE: Neurofibromatosis type 1 (NF1) is a tumour suppressor syndrome and also a bone disease. In the craniofacial region, local skeletal deformities have been recorded in patients with NF1. Obvious syndrome-related alterations of the jaws are particularly conspicuous in the mandible. Here we aimed to analyse the mandibular alterations of NF1-affected individuals from orthopantomograms (OPGs). MATERIALS AND METHODS: This study analyses 358 OPGs of 358 patients (mean age, 34...
April 26, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29761497/vibration-enhances-pge-2-il-6-and-il-8-expression-in-compressed-hpdl-cells-via-cyclooxygenase-pathway
#9
Pussadee Phusuntornsakul, Suwanna Jitpukdeebodintra, Prasit Pavasant, Chidchanok Leethanakul
BACKGROUND: Although vibration combined with orthodontic force may accelerate orthodontic tooth movement, little is known about the mechanisms that regulate the associated cellular responses. The propose of this study was to investigate whether mechanical vibration combined with compressive force regulates COX-2/PGE2 , IL-6 and IL-8 mRNA and protein expression in human periodontal ligament (hPDL) cells via the cyclooxygenase pathway. METHODS: The primary cultured hPDL cells were exposed to mechanical vibration, compressive force or a combination of both mechanical vibration and compressive force at 24, 48, 72 h...
May 14, 2018: Journal of Periodontology
https://www.readbyqxmd.com/read/29757451/effects-of-zinc-oxide-on-mrna-expression-of-genes-in-brain-tissue-of-rats
#10
İnan Gezgin, Cem Öziç
AIM: Zinc oxide nanoparticles are flexible platforms for biotechnology and biomedical applications. To investigate the expression level of the DR4, DR5, OPG, DcR1 and DcR2 in brain tissue. MATERIAL AND METHODS: The expression of DR4, DR5, OPG, DcR1, DcR2 and β-actin were measured through RT-PCR and western blotting in brain tissues of all three groups. The mRNA expression levels of DR4, DR5, OPG, DcR1 and DcR2 was investigated by using the RT-PCR and western blotting methods...
April 24, 2018: Turkish Neurosurgery
https://www.readbyqxmd.com/read/29754292/investigation-of-retinal-nerve-fiber-layer-thickness-and-ganglion-cell-layer-inner-plexiform-layer-thickness-in-patients-with-optic-pathway-gliomas
#11
Mustafa Hepokur, Ahmet Murat Sarici
PURPOSE: This study aimed to compare the optical coherence tomography (OCT) findings of optic pathway glioma (OPG) patients (sporadic or secondary to neurofibromatosis type 1, NF1) with NF1 without OPG patients and healthy controls. METHODS: This was a prospective, case-control study in which 27 patients (13 with OPGs and 14 with NF1 without OPGs) and 13 control subjects were included. The retinal nerve fiber layer (RNFL) thickness, macular thickness, and ganglion cell layer-inner plexiform layer (GCL-IPL) thickness findings measured using OCT and the results were compared between the groups...
May 12, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29751129/selective-inhibition-of-src-family-kinases-by-su6656-increases-bone-mass-by-uncoupling-bone-formation-from-resorption-in-mice
#12
Cyril Thouverey, Serge Ferrari, Joseph Caverzasio
Mice deficient in the non-receptor tyrosine kinase Src exhibit high bone mass due to impaired bone resorption and increased bone formation. Although several Src family kinase inhibitors inhibit bone resorption in vivo, they display variable effects on bone formation. SU6656 is a selective Src family kinase inhibitor with weaker activity towards the non-receptor tyrosine kinase Abl and receptor tyrosine kinases which are required for appropriate osteoblast proliferation, differentiation and function. Therefore, we sought to determine whether SU6656 could increase bone mass by inhibiting bone resorption and by stimulating bone formation, and to explore its mechanisms of action...
May 8, 2018: Bone
https://www.readbyqxmd.com/read/29749489/effects-of-osteoprotegerin-tnfrsf11b-in-two-models-of-abdominal-aortic-aneurysms
#13
Emina Vorkapic, Anne Kunath, Dick Wågsäter
Osteoprotegerin (OPG), additionally termed tumor necrosis factor receptor superfamily member 11B, is produced by vascular smooth muscle cells (VSMCs) and endothelial cells in the vasculature, and its release may be modulated by pro‑inflammatory cytokines, including interleukin‑1β and tumor necrosis factor‑α. The present study investigated the effects of treatment with low‑dose human recombinant OPG on abdominal aortic aneurysm (AAA) development in mice. Mice were treated with 1 µg human recombinant OPG four times (or vehicle) for 2 weeks prior to inducing AAA...
April 27, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29749449/dishevelled%C3%A2-2-modulates-osteogenic-differentiation-of-human-synovial-fibroblasts-in-osteoarthritis
#14
Lihua Zhang, Luan Luan, Yingying Ma
Dishevelled (Dvl)‑2 represents one of the cytoplasmic proteins, which serves as a pivotal hub in signaling intermediates through a number of different signaling pathways associated with the Wnt family. The aim of the present study was to investigate the roles and mechanisms of Dvl‑2 on synovial fibroblasts (SFBs) in osteoarthritis (OA). A Cell Counting kit‑8 (CCK‑8) assay was used to determine cell viability. An alkaline phosphatase (ALP) test kit was used to measure the activity of ALP. Western blot and reverse transcription‑quantitative polymerase chain reaction analysis were used to evaluate the protein and mRNA expression, respectively...
May 4, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29741767/down-regulation-of-intracellular-anti-apoptotic-proteins-particularly-c-flip-by-therapeutic-agents-the-novel-view-to-overcome-resistance-to-trail
#15
REVIEW
Ali Hassanzadeh, Majid Farshdousti Hagh, Mohammad Reza Alivand, Ali Akbar Movassaghpour Akbari, Karim Shams Asenjan, Raedeh Saraei, Saeed Solali
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL or Apo2L) is a member of the tumor necrosis factor (TNF) superfamily that induces apoptosis in different types of cancer cells via activation of caspase cascade. TRAIL interacts with its cognate receptors that placed on cancer cells surface, including TRAIL-R1 (death receptor 4, DR4), TRAIL-R2 (death receptor 5, DR5), TRAIL-R3 (decoy receptor 1, DcR1), TRAIL-R4 (decoy receptor 2, DcR2), and osteoprotegerin (OPG). Despite high apoptosis-inducing ability of TRAIL, various cancerous cells gain resistance to TRAIL gradually, and consequently TRAIL potential for apoptosis stimulation in these cells diminishes intensely...
May 9, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29740803/du-zhong-eucommia-ulmoides-oliv-cortex-extract-alleviates-lead-acetate-induced-bone-loss-in-rats
#16
Shanshan Qi, Hongxing Zheng, Chen Chen, Hai Jiang
The purpose of this study was to evaluate the protective effect of Du-Zhong cortex extract (DZCE) on lead acetate-induced bone loss in rats. Forty female Sprague-Dawley rats were randomly divided into four groups: group I (control) was provided with distilled water. Group II (PbAc) received 500 ppm lead acetate in drinking water for 60 days. Group III (PbAc+DZCE) received 500 ppm lead acetate in drinking water, and given intragastric DZCE (100 mg/kg body weight) for 60 days. Group IV (DZCE) was given intragastric DZCE (100 mg/kg body weight) for 60 days...
May 9, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29736604/selective-inhibition-of-receptor-activator-of-nf-%C3%AE%C2%BAb-ligand-rankl-in-hematopoietic-cells-improves-outcome-after-experimental-myocardial-infarction
#17
Svetlana Slavic, Olena Andrukhova, Kristopher Ford, Stephan Handschuh, Nejla Latic, Ursula Reichart, Soleman Sasgary, Claudia Bergow, Lorenz C Hofbauer, Paul J Kostenuik, Reinhold G Erben
The RANK (receptor activator of nuclear factor κB)/RANKL (RANK ligand)/OPG (osteoprotegerin) axis is activated after myocardial infarction (MI), but its pathophysiological role is not well understood. Here, we investigated how global and cell compartment-selective inhibition of RANKL affects cardiac function and remodeling after MI in mice. Global RANKL inhibition was achieved by treatment of human RANKL knock-in (huRANKL-KI) mice with the monoclonal antibody AMG161. huRANKL-KI mice express a chimeric RANKL protein wherein part of the RANKL molecule is humanized...
May 8, 2018: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/29730894/cytokine-expression-in-response-to-root-repair-agents
#18
R R Oliveira, W L F Tavares, A L Reis, V A Silva, L Q Vieira, A P Ribeiro Sobrinho
AIM: To evaluate the expression of TNF-α, IL-6, IFN-γ, TGF-β, IL-4, IL-10, RANKL, RANK and OPG on mouse calvarial bone treated with MTA, Geristore® and Emdogain® . METHODOLOGY: Bone wounds were made on the heads of C57BL/6 mice, breaking the periosteum and the cortical surface of the calvaria. Each repair agent was inserted into sectioned Eppendorf microtubes and placed on the bone wound, and soft tissues were sutured. At 14 and 21 days, animals were sacrificed and the treated region was dissected...
May 6, 2018: International Endodontic Journal
https://www.readbyqxmd.com/read/29729691/in-silico-estrogen-like-activity-and-in-vivo-osteoclastogenesis-inhibitory-effect-of-cicer-arietinum-extract
#19
Amany A Sayed, Abdo A Elfiky
Postmenopausal osteoporosis is a common disorder accompanied with estrogen deficiency in women. Plants containing phytoestrogens and amino acids have been used in the osteoporosis treatment. The present study aims to evaluate the estrogen-like activity of the Cicer arietinum extract (CAE) and its ability to inhibit osteoclastogenesis process. These achieved by investigating the binding of its active phytoestrogens (genistein, daidzein, formononetin and biochanin A) to the estrogen receptors (ER) α and β of rats and human in silico...
April 30, 2018: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/29729471/meningioma-and-bone-hyperostosis-expression-of-bone-stimulating-factors-and-review-of-the-literature
#20
Andrea Di Cristofori, Massimiliano Del Bene, Marco Locatelli, Francesca Boggio, Giulia Ercoli, Stefano Ferrero, Alessandro Del Gobbo
OBJECTIVE: Several hypothesis have been proposed in order to understand the mechanisms underlying the meningioma related hyperostosis. Objective of our study was to investigate the role of osteoprotegerin(OPG), insulin-like growth factor-1(IGF-1), endothelin-1(ET-1), Bone Morphogenetic Protein(BMP-2 and -4). METHODS: A total of 149 patients (39 males and 110 females with a mean age of 62 years) that received surgery were included. Depending on the relationship with the bone, meningiomas were classified in hyperostotic, osteolytic, infiltrative and without relation with the bone...
May 2, 2018: World Neurosurgery
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