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Bone Remodeling

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https://www.readbyqxmd.com/read/28092725/strontium-ranelate-a-promising-disease-modifying-osteoarthritis-drug
#1
Weiyu Han, Shicai Fan, Xiaochun Bai, Changhai Ding
The articular cartilage and subchondral bone may have potential crosstalk in the development and progression of osteoarthritis (OA). Strontium ranelate (SrR) has the ability to dissociate the bone remodeling process and to change the balance between bone resorption and bone formation. Its effect on subchondral bone makes it a potential disease- modifying osteoarthritis drug (DMOAD) in the treatment of OA. The aim of the current review is to summarize up-to-date pharmacological and clinical data of SrR for OA treatment...
January 16, 2017: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/28091892/bariatric-roux-en-y-gastric-bypass-surgery-adipocyte-proteins-involved-in-increased-bone-remodeling-in-humans
#2
Maria Fernanda G Biagioni, Adriana L Mendes, Célia Regina Nogueira, Celso V Leite, Loraine Gollino, Gláucia Mfs Mazeto
PURPOSE: Bariatric surgery has been associated with bone remodeling changes. The action of adipokines on the expression of receptor activator of nuclear factor kappa β ligand (RANKL) and osteoprotegerin (OPG) and on an increase in sclerostin could be related to these changes. MATERIALS AND METHODS: This study aimed to assess the repercussions of weight loss, fat mass (FM), and fat-free mass (FFM) loss and biochemical and hormonal changes on bone remodeling markers after Roux-en-Y gastric bypass (RYGB)...
January 13, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28090276/overexpression-of-recombinant-human-teriparatide-rhpth-1-34-in-escherichia-coli-an-innovative-gene-fusion-approach
#3
Nahid Bakhtiari, Zahra Amini Bayat, Sepideh Sagharidouz, Mohsen Vaez
BACKGROUND: Parathyroid hormone is an 84-amino acid peptide secreted by the parathyroid glands. Its physiological role is maintenance of normal serum calcium level and bone remodeling. Biological activity of this hormone is related to N-terminal 1-34 amino acids. The recombinant form of hormone (1-34) has been approved for treatment of osteoporosis from 2002. In this study, a novel fusion partner has been developed for preparation of high yield recombinant 1-34 amino acids of hPTH. METHODS: Novel nucleotide cassette designed encoding a chimeric fusion protein comprising of a fusion partner consisting of a His-tag in N-terminal, 53 amino acids belong to Escherichia coli (E...
January 2017: Avicenna Journal of Medical Biotechnology
https://www.readbyqxmd.com/read/28089368/the-transition-from-pediatric-to-adult-care-for-youth-with-epilepsy-basic-biological-sociological-and-psychological-issues
#4
REVIEW
Peter Camfield, Carol Camfield, Kanetee Busiah, David Cohen, Alison Pack, Rima Nabbout
Transition from pediatric to adult health care for adolescents with epilepsy is challenging for the patient, family, and health care workers. This paper is the first of three that summarize the main findings from the 2nd Symposium on Transition in Epilepsies, held in Paris from June 14-25, 2016. In this paper we describe five basic themes that have an important effect on transition. First, there are important brain changes in adolescence that leave an imbalance between risk taking and pleasure seeking behaviors and frontal executive function compared with adults...
January 12, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28081119/sclerostin-promotes-bone-remodeling-in-the-process-of-tooth-movement
#5
Rui Shu, Ding Bai, Tzongjen Sheu, Yao He, Xianrui Yang, Chaoran Xue, Yiruo He, Mengyuan Zhao, Xianglong Han
Tooth movement is a biological process of bone remodeling induced by mechanical force. Sclerostin secreted by osteocytes is mechanosensory and important in bone remodeling. However, little is known regarding the role of sclerostin in tooth movement. In this study, models of experimental tooth movement were established in rats and mice. Sclerostin expression was investigated with immunohistochemistry staining, and osteoclastic activity was analyzed with tartrate-resistant acid phosphatase (TRAP) staining. MLO-Y4 osteocyte-like cells underwent uniaxial compression and tension stress or were cultured in hypoxia conditions...
2017: PloS One
https://www.readbyqxmd.com/read/28079506/response-of-human-rheumatoid-arthritis-osteoblasts-and-osteoclasts-to-adiponectin
#6
Grit Krumbholz, Susann Junker, Florian M P Meier, Markus Rickert, Jürgen Steinmeyer, Stefan Rehart, Uwe Lange, Klaus W Frommer, Georg Schett, Ulf Müller-Ladner, Elena Neumann
OBJECTIVES: Adiponectin is an effector molecule in the pathophysiology of rheumatoid arthritis, e.g. by inducing cytokines and matrix degrading enzymes in synovial fibroblasts. There is growing evidence that adiponectin affects osteoblasts and osteoclasts although the contribution to the aberrant bone metabolism in rheumatoid arthritis is unclear. Therefore, the adiponectin effects on rheumatoid arthritis-derived osteoblasts and osteoclasts were evaluated. METHODS: Adiponectin and its receptors were examined in bone tissue...
January 5, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28079119/interleukin-32-gamma-stimulates-bone-formation-by-increasing-mir-29a-in-osteoblastic-cells-and-prevents-the-development-of-osteoporosis
#7
Eun-Jin Lee, Sang-Min Kim, Bongkun Choi, Eun-Young Kim, Yeon-Ho Chung, Eun-Ju Lee, Bin Yoo, Chang-Keun Lee, Seokchan Hong, Beom-Jun Kim, Jung-Min Koh, Soo-Hyun Kim, Yong-Gil Kim, Eun-Ju Chang
Interleukin-32 gamma (IL-32γ) is a recently discovered cytokine that is elevated in inflamed tissues and contributes to pathogenic features of bone in human inflammatory rheumatic diseases. Nevertheless, the role of IL-32γ and its direct involvement in bone metabolism is unclear. We investigated the molecular mechanism of IL-32γ in bone remodeling and the hypothetical correlation between IL-32γ and disease activity in osteoporosis patients. Transgenic (TG) mice overexpressing human IL-32γ showed reduced bone loss with advancing age, increased bone formation, and high osteogenic capacity of osteoblast compared to wild-type (WT) mice through the upregulation of miR-29a, which caused a reduction of Dickkopf-1 (DKK1) expression...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078880/orthodontic-forces-modulate-insulin-like-growth-factor-binding-protein-5-changes-in-gingival-crevicular-fluid
#8
A Ballini, L Santacroce, S Cantore, R Saini, F Mastrangelo, A Desiate, S Scacco
Orthodontic tooth movement results from the response of the periodontal tissue to orthodontic force, which leads to modeling and remodeling of the surrounding alveolar bone. The response is considered to occur through the activation of specific signaling pathways, many of which are known, all acting to ultimately result in tooth movement. Much is known about the actions of these two cells, and the signaling pathways that affect them, both in bone and orthodontic literature, however, to date, little work has been carried out to examine the effect of the insulin-like growth factor binding proteins (IGFBP) in orthodontics...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28078844/a-natural-formula-containing-lactoferrin-equisetum-arvensis-soy-isoflavones-and-vitamin-d3-modulates-bone-remodeling-and-inflammatory-markers-in-young-and-aged-rats
#9
L Menghini, C Ferrante, L Leporini, L Recinella, A Chiavaroli, S Leone, G Pintore, M Vacca, G Orlando, L Brunetti
A pivotal role in osteoporosis development is played by radical oxygen species (ROS), the increased production of which is related to inhibited osteoblastic activity and bone formation. A new field of research could involve medicinal plants with antioxidant and protective effects in osteoporosis. Furthermore, considering the multifactorial metabolic aspects of osteoporosis, the pharmacological association of multiple medicinal plants could improve patient response. The aim of the present study is to evaluate in vitro and in vivo the protective effects of a natural formula containing lactoferrin 12%, Equisetum arvensis ES 54%, soy isoflavones 34% and vitamin D3 0...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28076929/non-invasive-imaging-demonstrates-clinical-features-of-ankylosing-spondylitis-in-a-rat-adjuvant-model-a-case-study
#10
N Accart, J Dawson, F Kolbinger, I Kramer, N Beckmann
Ankylosing spondylitis is a common rheumatic disease involving both inflammatory erosive osteopenia and bony overgrowth. Main disease features are recapitulated in small rodents challenged with complete Freund's adjuvant. MRI was used to follow longitudinally in vivo changes induced in the rat spine and micro-CT as terminal assessment of bone damage. Histochemistry methods were used to validate these imaging modalities in view of preclinical drug testing and translational applications of spine imaging. Animals were examined using a 3D fat-suppressed gradient-echo sequence, following the injection of gadolinium...
November 2, 2016: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/28076887/in-vivo-bone-tunnel-evaluation-of-nanoparticle-grafts-using-an-acl-reconstruction-rabbit-model
#11
S A Grant, S E Smith, H Schmidt, F Pfeiffer, K Kuroki, S Sherman, R A White, D A Grant
Acellular human gracilis tendons conjugated with gold nanoparticles (AuNP) and hydroxyapatite nanoparticles (nano-HAp) were used as a graft in an anterior cruciate ligament (ACL) reconstruction rabbit model. The ACLs of 11 New Zealand rabbits were reconstructed using grafts conjugated without nanoparticles, with AuNP only, and with both AuNP and nano-HAp. Semi-quantitative histological scoring of bone tunnel portion of grafts was performed after 14 weeks. Bone tunnels were scored for graft degeneration, graft remodeling, percentage of new host fibrous connective, collateral connection, head-to-head connection, graft collagen fiber organization, new host fibrous connective tissue organization, and graft and interface vascularity...
January 11, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28072993/-effect-of-inserted-angle-on-the-stability-of-loaded-microscrews
#12
P Shao, Z R Xu, L X Zhao, Z H Zhao
Objective: To evaluate the effect of different insertion angles on the osseointegration of loaded microscrews in beagle jaws. Methods: Forty-eight microscrews were inserted at four different angles (30°, 50°, 70° and 90°) into the interradicular zones between the mandibular first molar and third premolar in twelve beagles and the microscrews had been loaded with a force of 2 N immediately for 8 weeks. After microscrew-bone specimens fixed, the maximum output value (Fmax) of pull-out test was recorded and the histomorphological changes of hard tissue were observed...
January 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28072837/locally-produced-bdnf-promotes-sclerotic-change-in-alveolar-bone-after-nerve-injury
#13
Hiroko Ida-Yonemochi, Yurie Yamada, Hiroyuki Yoshikawa, Kenji Seo
Brain-derived neurotrophic factor (BDNF), which is released due to nerve injury, is known to promote the natural healing of injured nerves. It is often observed that damage of mandibular canal induces local sclerotic changes in alveolar bone. We reported that peripheral nerve injury promotes the local production of BDNF; therefore, it was possible to hypothesize that peripheral nerve injury affects sclerotic changes in the alveolar bone. This study aimed to evaluate the effect of BDNF on osteogenesis using in vitro osteoblast-lineage cell culture and an in vivo rat osteotomy model...
2017: PloS One
https://www.readbyqxmd.com/read/28070625/a-study-of-radiological-features-of-healing-in-long-bone-fractures-among-infants-less-than-a-year
#14
Christopher Warner, Sabine Maguire, Laszlo Trefan, Angie Miller, Jason Weinman, Michael Fadell
PURPOSE: To create a timetable for dating long bone fractures in infants aged less than 1 year using previously defined radiographic signs of fracture healing. MATERIALS AND METHODS: A retrospective cross-sectional time series of long bone fractures in infants aged less than 1 year was conducted from 2006 to 2013. After exclusion criteria were applied 59 digital image series were available for review from 40 infants. Utilizing published criteria for dating fractures, the presence or absence of four pre-defined features of healing was scored: periosteal reaction, callus, bridging, and remodeling...
January 10, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28070238/hematological-disorders-and-pulmonary-hypertension
#15
REVIEW
Rajamma Mathew, Jing Huang, Joseph M Wu, John T Fallon, Michael H Gewitz
Pulmonary hypertension (PH), a serious disorder with a high morbidity and mortality rate, is known to occur in a number of unrelated systemic diseases. Several hematological disorders such as sickle cell disease, thalassemia and myeloproliferative diseases develop PH which worsens the prognosis. Associated oxidant injury and vascular inflammation cause endothelial damage and dysfunction. Pulmonary vascular endothelial damage/dysfunction is an early event in PH resulting in the loss of vascular reactivity, activation of proliferative and antiapoptotic pathways leading to vascular remodeling, elevated pulmonary artery pressure, right ventricular hypertrophy and premature death...
December 26, 2016: World Journal of Cardiology
https://www.readbyqxmd.com/read/28069536/m2-macrophages-infusion-ameliorates-obesity-and-insulin-resistance-by-remodeling-inflammatory-macrophages-homeostasis-in-obese-mice
#16
Qi Zhang, Haojie Hao, Zongyan Xie, Yu Cheng, Yaqi Yin, Min Xie, Hong Huang, Jieqing Gao, Hongyu Liu, Chuan Tong, Li Zang, Yiming Mu, Weidong Han
OBJECTIVE: The role of M2 macrophages infusion in dealing with obesity is still little known. In this study, the therapeutic effects of M2 macrophages infusion were investigated. METHODS: High fat diet (HFD) was used to induce obesity in C57BL/6N mice. 5 × 10(5) M2 macrophages, derived from the bone marrow, were injected into obese mice through the tail vein twice with an interval of one week. RESULTS: One week after the second injection, weight of inguinal adipose pad was significantly decreased...
January 6, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28068876/tissue-engineered-model-of-human-osteolytic-bone-tumor
#17
Aranzazu Villasante, Alessandro Marturano, Samuel T Robinson, Zen Liu, X Edward Guo, Gordana Vunjak-Novakovic
Ewing's sarcoma (ES) is a poorly differentiated pediatric tumor of aggressive behavior characterized by propensity to metastasize to bone. Interactions between the tumor and bone cells orchestrate a vicious cycle in which tumor cells induce osteoclast differentiation and activation to cause osteolytic lesions, broken bones, pain and hypercalcemia. The lack of controllable models that can recapitulate osteolysis in ES impedes the development of new therapies and limits our understanding of how tumor cells invade bone...
January 9, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28068870/induced-remodeling-of-porcine-tendons-to-human-anterior-cruciate-ligaments-by-%C3%AE-gal-epitope-removal-and-partial-crosslinking
#18
Kevin Robert Stone, Ann Walgenbach, Uri Galili
This review describes a novel method developed for processing porcine tendon and other ligament implants which enables in situ remodeling into autologous ligaments in humans. The method differs from methods using extracellular matrices (ECM) which provide post-operative ortho-biologic support (i.e. augmentation grafts) for healing of injured ligaments, in that the porcine bone-patellar-tendon-bone itself serves as the graft replacing ruptured anterior cruciate ligament (ACL). The method allows for gradual remodeling of porcine tendon into autologous human ACL while maintaining the biomechanical integrity...
January 9, 2017: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/28064238/myeloid-malignancies-and-the-microenvironment
#19
Claudia Korn, Simón Méndez-Ferrer
Research in the last few years has revealed a sophisticated interaction network between multiple bone marrow (BM) cells that regulate different hematopoietic stem cell (HSC) properties, such as proliferation, differentiation, localization and self-renewal during homeostasis. These mechanisms are essential to keep the physiological HSC numbers in check and interfere with malignant progression. Besides the identification of multiple mutations and chromosomal aberrations driving the progression of myeloid malignancies, alterations in the niche compartment recently gained attention in contributing to disease progression...
November 15, 2016: Blood
https://www.readbyqxmd.com/read/28064107/ethnomedicine-based-evaluation-of-osteoprotective-properties-of-tinospora-cordifolia-on-in-vitro-and-in-vivo-model-systems
#20
G Abiramasundari, C M Mohan Gowda, G Pampapathi, Sheela Praveen, S Shivamurugan, M Vijaykumar, A Devi, M Sreepriya
Indian ethnomedicine acclaims the use of Tinospora cordifolia (TC) in the treatment of bone fractures and vat rakta (gout). The objective of the study is to investigate the effects of alcoholic extract of Tinospora cordifolia on bone remodeling (involving osteoblastic and osteoclastic actions) in vitro and protect against ovariectomy-induced bone loss in vivo. Human osteoblast-like cells MG-63 and primary osteoblast cells isolated from rat femur were used as osteoblast models and RAW macrophage cell line 264...
January 5, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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