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Bone remodelling

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https://www.readbyqxmd.com/read/28531918/protective-effect-of-ethanolic-extract-of-urtica-urens-l-against-the-toxicity-of-imidacloprid-on-bone-remodeling-in-rats-and-antioxidant-activities
#1
Massara Mzid, Riadh Badraoui, Sameh Ben Khedir, Zouheir Sahnoun, Tarek Rebai
Imidacloprid (IMI) is very harmful to human health and cause problems. Recently, plants have been considered as potential agents for protection against these disorders. Urtica urens L. (UU) is very useful for relieving rheumatic pains and there is no scientific evidence justifying its use, which lets us think of its direct effect on the bone. This study aimed to investigate the protective effect of UU against toxicity effects of IMI in female rat. Rats were divided into control group, 3 groups treated with IMI at 50, 200 or 300mg/kg/day and 3 groups co-treated with IMI (50, 200 or 300mg/kg/day)+100mg/kg/day of UU...
May 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28531321/cortical-bone-size-deficit-in-adult-patients-with-type-1-diabetes-mellitus
#2
Charlotte Verroken, Wout Pieters, Loïc Beddeleem, Stefan Goemaere, Hans-Georg Zmierczak, Samyah Shadid, Jean-Marc Kaufman, Bruno Lapauw
CONTEXT: The increased fracture risk associated with type 1 diabetes mellitus (T1DM) remains unexplained by traditional risk factors such as low areal bone mineral density (aBMD). Nonetheless, few data exist on other determinants of bone strength in T1DM, including volumetric BMD (vBMD) and bone geometry. OBJECTIVE: We compared areal and volumetric bone parameters and cortical bone geometry in adult T1DM patients and gender- and age-matched controls. DESIGN: Cross-sectional study including 64 adult T1DM patients (38 men, 41...
May 22, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28529755/bone-biomarker-for-the-clinical-assessment-of-osteoporosis-recent-developments-and-future-perspectives
#3
REVIEW
Tsung-Rong Kuo, Chih-Hwa Chen
Bone biomarkers included formation, resorption and regulator are released during the bone remodeling processes. These bone biomarkers have attracted much attention in the clinical assessment of osteoporosis treatment in the past decade. Combination with the measurement of bone mineral density, the clinical applications of bone biomarkers have provided comprehensive information for diagnosis of osteoporosis. However, the analytical approaches of the bone biomarkers are still the challenge for further clinical trials...
2017: Biomarker Research
https://www.readbyqxmd.com/read/28529660/biomechanical-considerations-in-slipped-capital-femoral-epiphysis-and-insights-into-prophylactic-fixation
#4
E Leblanc, J M Bellemore, T Cheng, D G Little, O Birke
PURPOSE: Slipped capital femoral epiphysis (SCFE) is a deformity of the proximal femur secondary to widened and unstable physis. In stabilising the slip, gold standard treatments stop growth and involve premature physeal closure, which prevents the remodelling of the acquired deformity and creates a leg length discrepancy that may be significant in younger patients. METHODS: We measured the impact of placing threaded screws across the proximal femoral physis by measuring the centre-trochanteric distance (CTD) and articulo-trochanteric distance (ATD) in participants with or without prophylactic fixation...
April 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28528673/acid-sensing-ion-channel-pharmacology-past-present-and-future-%C3%A2
#5
Lachlan D Rash
pH is one of the most strictly controlled parameters in mammalian physiology. An extracellular pH of ~7.4 is crucial for normal physiological processes, and perturbations to this have profound effects on cell function. Acidic microenvironments occur in many physiological and pathological conditions, including inflammation, bone remodeling, ischemia, trauma, and intense synaptic activity. Cells exposed to these conditions respond in different ways, from tumor cells that thrive to neurons that are either suppressed or hyperactivated, often fatally...
2017: Advances in Pharmacology
https://www.readbyqxmd.com/read/28527581/nuclear-receptors-in-skeletal-homeostasis
#6
Hao Zuo, Yihong Wan
Nuclear receptors are a family of transcription factors that can be activated by lipophilic ligands. They are fundamental regulators of development, reproduction, and energy metabolism. In bone, nuclear receptors enable bone cells, including osteoblasts, osteoclasts, and osteocytes, to sense their dynamic microenvironment and maintain normal bone development and remodeling. Our views of the molecular mechanisms in this process have advanced greatly in the past decade. Drugs targeting nuclear receptors are widely used in the clinic for treating patients with bone disorders such as osteoporosis by modulating bone formation and resorption rates...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28524744/sphingosine-1-phosphate-signaling-in-bone-remodeling-multifaceted-roles-and-therapeutic-potential
#7
Anastasia Meshcheryakova, Diana Mechtcheriakova, Peter Pietschmann
Sphingolipids belong to a complex class of lipid molecules that are crucially involved in the regulation of important biological processes including proliferation, migration and apoptosis. Given the significant progress made in understanding the sphingolipid pathobiology of several diseases, sphingolipid-related checkpoints emerge as attractive targets. Recent data indicate the multifaceted contribution of the sphingolipid machinery to osteoclast - osteoblast crosstalk, representing one of the pivotal interactions underlying bone homeostasis...
May 19, 2017: Expert Opinion on Therapeutic Targets
https://www.readbyqxmd.com/read/28524624/pulmonary-arterial-hypertension-progress-in-understanding-the-disease-and-prioritizing-strategies-for-drug-development
#8
REVIEW
P Ghataorhe, C J Rhodes, L Harbaum, M Attard, J Wharton, M R Wilkins
Pulmonary arterial hypertension (PAH), at one time a largely overlooked disease, is now the subject of intense study in many academic and biotech groups. The availability of new treatments has increased awareness of the condition. This in turn has driven a change in the demographics of PAH, with an increase in the mean age at diagnosis. The diagnosis of PAH in more elderly patients has highlighted the need for careful phenotyping of patients and for further studies to understand how best to manage pulmonary hypertension associated with, for example, left heart disease...
May 19, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28524179/a-fkbp5-mutation-is-associated-with-paget-s-disease-of-bone-and-enhances-osteoclastogenesis
#9
Bingru Lu, Yulian Jiao, Yinchang Wang, Jing Dong, Muyun Wei, Bin Cui, Yafang Sun, Laicheng Wang, Bingchang Zhang, Zijiang Chen, Yueran Zhao
Paget's disease of bone (PDB) is a common metabolic bone disease that is characterized by aberrant focal bone remodeling, which is caused by excessive osteoclastic bone resorption followed by disorganized osteoblastic bone formation. Genetic factors are a critical determinant of PDB pathogenesis, and several susceptibility genes and loci have been reported, including SQSTM1, TNFSF11A, TNFRSF11B, VCP, OPTN, CSF1 and DCSTAMP. Herein, we report a case of Chinese familial PDB without mutations in known genes and identify a novel c...
May 19, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28523374/capturing-microscopic-features-of-bone-remodeling-into-a-macroscopic-model-based-on-biological-rationales-of-bone-adaptation
#10
Young Kwan Kim, Yoshitaka Kameo, Sakae Tanaka, Taiji Adachi
To understand Wolff's law, bone adaptation by remodeling at the cellular and tissue levels has been discussed extensively through experimental and simulation studies. For the clinical application of a bone remodeling simulation, it is significant to establish a macroscopic model that incorporates clarified microscopic mechanisms. In this study, we proposed novel macroscopic models based on the microscopic mechanism of osteocytic mechanosensing, in which the flow of fluid in the lacuno-canalicular porosity generated by fluid pressure gradients plays an important role, and theoretically evaluated the proposed models, taking biological rationales of bone adaptation into account...
May 18, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28522681/endothelial-nox1-oxidase-assembly-in-human-pulmonary-arterial-hypertension-driver-of-gremlin1-mediated-proliferation
#11
Imad Al Ghouleh, Sanghamitra Sahoo, Daniel N Meijles, Jefferson H Amaral, Daniel S de Jesus, John Sembrat, Mauricio Rojas, Dmitry A Goncharov, Elena A Goncharova, Patrick J Pagano
Background: Pulmonary arterial hypertension (PAH) is a rapidly degenerating and devastating disease of increased pulmonary vessel resistance leading to right heart failure. Palliative modalities remain limited despite recent endeavors to investigate the mechanisms underlying increased pulmonary vascular resistance, i.e. aberrant vascular remodeling and occlusion. However, little is known of the molecular mechanisms responsible for endothelial proliferation, a root cause of PAH-associated vascular remodeling...
May 18, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28522401/comparison-of-the-osteogenesis-and-fusion-rates-between-activin-a-bmp-2-chimera-ab204-and-rhbmp-2-in-a-beagle-s-posterolateral-lumbar-spine-model
#12
Guang Bin Zheng, Byung-Hak Yoon, Jae Hyup Lee
BACKGROUND CONTEXT: Activin A/BMP-2 chimera (AB204) could promote bone healing more effectively than recombinant bone morphogenetic protein 2 (rhBMP-2) with much lower dose in rodent model, but there is no report about the effectiveness of AB204 in a large animal model. PURPOSE: The purpose of this study was to compare the osteogenesis and fusion rate between AB204 and rhBMP-2 using biphasic calcium phosphate (BCP) as a carrier in beagle's posterolateral lumbar fusion model...
May 15, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28521692/pharmacological-treatment-of-bone-loss
#13
Rui Pang, Weibo Xia
Bone loss is common in clinical practice, such as health assessment of postmenopausal women, treatment of tumor metastasis, side-effects of glucocorticoids, and skeletal manifestations of inflammatory diseases. The imbalance of remodeling between bone resorption and bone formation, the pathophysiological basis of bone loss, increases bone fragility. The treatment of bone loss is mainly carried out from the treatment of osteoporosis. There are various pharmacological therapies for bone loss, which will be introduced in 3 aspects, including anti-resorptive agents, anabolic agents and new medications...
May 16, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28518186/molecular-activity-and-osseointegration-after-single-dose-irradiation-an-in-vivo-study
#14
Jan Nyberg, Gisela Helenius, Christer Dahlin, Carina B Johansson, Omar Omar
PURPOSE: Irradiation results in deleterious effects on bone healing and integration of titanium implants. The impact of irradiation on osseointegration has been demonstrated in histologic studies, but the underlying molecular mechanisms have not been explored. This study aimed to investigate the effects of single-dose irradiation on the expression of biologic mediators crucial for inflammation, bone formation, and bone remodeling and to relate these molecular activities to implant stability after a 5-week healing period...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28517958/distance-of-translation-as-a-predictor-of-failure-of-fixation-in-paediatric-supracondylar-fractures
#15
P Holland, A Highcock, C Bruce
INTRODUCTION This study investigates the influence of incomplete reduction of supracondylar fractures on the incidence of loss of reduction requiring reoperation MATERIALS AND METHODS A review of 107 consecutive patients presenting with supracondylar fractures treated with closed reduction and Kirschner wire stabilisation, between January 2011 and March 2013, was conducted. The mean age was 5 years (range 10 months to 12 years). Pre-, intra- and postoperative radiographs were reviewed. All patients who had failure of fixation requiring revision surgery were identified...
May 18, 2017: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/28515495/the-failure-envelope-concept-applied-to-the-bone-dental-implant-system
#16
R Korabi, K Shemtov-Yona, A Dorogoy, D Rittel
Dental implants interact with the jawbone through their common interface. While the implant is an inert structure, the jawbone is a living one that reacts to mechanical stimuli. Setting aside mechanical failure considerations of the implant, the bone is the main component to be addressed. With most failure criteria being expressed in terms of stress or strain values, their fulfillment can mean structural flow or fracture. However, in addition to those effects, the bony structure is likely to react biologically to the applied loads by dissolution or remodeling, so that additional (strain-based) criteria must be taken into account...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28512292/effects-of-treadmill-running-with-different-intensity-on-rat-subchondral-bone
#17
Zhe Li, Sheng-Yao Liu, Lei Xu, Shao-Yong Xu, Guo-Xin Ni
Subchondral bone (SB) is recognized as a key factor in normal joint protection, not only does it provide a shock absorbing and supportive function for the cartilage, but it may also be important for cartilage metabolism. Mechanical loading is considered to be a critical regulator of skeletal homeostasis, including bone and cartilage. It is suggested that both cartilage and bone may respond to mechanical loading in an intensity-dependent manner. In this report, we have discovered that the subchondral plate became thicker with higher bone mineral density (BMD) and lower porosity, while trabecular bone became more plate-like and denser with higher BMD in high-intensity running (HIR) group...
May 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28508565/menaquinone-4-enhances-osteogenic-potential-of-human-amniotic-fluid-mesenchymal-stem-cells-cultured-in-a-2d-and-3d-dynamic-culture-system
#18
Domitilla Mandatori, Letizia Penolazzi, Caterina Pipino, Pamela Di Tomo, Sara Di Silvestre, Natalia Di Pietro, Sara Trevisani, Marco Angelozzi, Mariangela Ucci, Roberta Piva, Assunta Pandolfi
Menaquinones, also known as Vitamin K2 family, regulate calcium homeostasis in a "bone-vascular cross talk" and recently received particular attention for their positive effect on bone formation. Since the correlation between menaquinones and bone metabolism to date is still unclear, the objective of our study was to investigate the possible role of menaquinone-4 (MK-4), an isoform of the menaquinones family, in the modulation of osteogenesis. For this reason we used a model of human Amniotic Fluid Mesenchymal Stem Cells (hAFMSCs) cultured both in two-dimensional (2D) and three-dimensional (3D, RCCS™bioreactor) in vitro culture systems...
May 16, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28508515/extra-oral-digital-scanning-and-imaging-superimposition-for-volume-analysis-of-bone-remodeling-after-tooth-extraction-with-and-without-2-types-of-particulate-porcine-mineral-insertion-a-randomized-controlled-trial
#19
Antonio Barone, Paolo Toti, Giovan-Battista Menchini-Fabris, Giacomo Derchi, Simone Marconcini, Ugo Covani
BACKGROUND: Incorporation of bone substitute material into the extraction socket could minimize the edentulous ridge volume loss or maximize the bone formation within the healing area. PURPOSE: The aim of the study was to test the effectiveness in maintaining the volumetric contour of fresh extraction sockets grafted with or without 2 types of porcine biomaterials and covered with a resorbable barrier. MATERIALS AND METHODS: In the present multi-center single-blind randomized control trial, 55 patients underwent 1-tooth extraction, were surveyed, and randomly allocated to control- (25 sites, nat-group) or test groups (15 sites grafted with pre-hydrated collagenated cortico-cancellous porcine bone, coll-group, and 15 with cortical porcine bone, cort-group)...
May 16, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28508284/repeatability-of-quantitative-parameters-of-18f-fluoride-pet-ct-and-biochemical-tumour-and-specific-bone-remodelling-markers-in-prostate-cancer-bone-metastases
#20
Cecilia Wassberg, Mark Lubberink, Jens Sörensen, Silvia Johansson
PURPOSE: 18F-fluoride PET/CT exhibits high sensitivity to delineate and measure the extent of bone metastatic disease in patients with prostate cancer. 18F-fluoride PET/CT could potentially replace traditional bone scintigraphy in clinical routine and trials. However, more studies are needed to assess repeatability and biological uptake variation. The aim of this study was to perform test-retest analysis of quantitative PET-derived parameters and blood/serum bone turnover markers at the same time point...
December 2017: EJNMMI Research
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