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Remodeling bone

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https://www.readbyqxmd.com/read/28440536/selected-bone-morphogenetic-proteins-the-possibility-of-their-use-in-the-diagnostics-and-therapy-of-severe-asthma
#1
Marcelina Koćwin, Mateusz Jonakowski, Marcelina Przemęcka, Michał Panek, Piotr Kuna
Asthma is a chronic heterogeneous illness of the lower airway with an inflammatory basis, developing from hyperresponsiveness and bronchial obstruction. One of the more unfavourable processes occurring in the airway are the long-term changes of the respiratory tract known as remodelling, resulting in complete irreversible obstruction. Bone morphogenetic protein (BMP) is a member of the Transforming Growth Factor beta (TGF-b) superfamily, which regulates processes in embryonic and post-embryonic development...
2017: Advances in Respiratory Medicine
https://www.readbyqxmd.com/read/28439050/-calcium-and-bone-metabolism-across-women-s-life-stages-changes-of-biochemical-markers-of-bone-turnover-in-life-cycle-of-women
#2
Osamu Chaki
Development of bone metabolism markers began about 35 years ago. Current by the osteoporosis and bone metabolism diseases diagnosis and treatment efficacy. In childhood and adolescence, bone formation and resorption were increased, but formation rate was exceeded resorption rate. To keep strength of bone, bone formation and resorption are balanced(remodeling)in the period of maturity, Bone mineral density greatly decreases and biochemical markers of bone turnover markedly increase in postmenopausal women, indicating accelerated bone remodeling because of estrogen withdrawal...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28435697/calcium-phosphates-and-silicon-exploring-methods-of-incorporation
#3
Ana I Rodrigues, Rui L Reis, Clemens A van Blitterswijk, Isabel B Leonor, Pamela Habibović
BACKGROUND: Bioinorganics have been explored as additives to ceramic bone graft substitutes with the aim to improve their performance in repair and regeneration of large bone defects. Silicon (Si), an essential trace element involved in the processes related to bone formation and remodeling, was shown not only to enhance osteoblasts proliferation but also to stimulate the differentiation of mesenchymal stem cells (MSCs) and preosteoblasts into the osteogenic lineage. In this study, the added value of Si to calcium phosphate (CaP) coatings was evaluated...
2017: Biomaterials Research
https://www.readbyqxmd.com/read/28434032/diabetes-bone-and-glucose-lowering-agents-basic-biology
#4
REVIEW
Beata Lecka-Czernik
Skeletal fragility often accompanies diabetes and does not appear to correlate with low bone mass or trauma severity in individuals with diabetes. Instead (and in contrast to those with osteoporotic bone disease), bone remodelling and bone turnover are compromised in both type 1 and type 2 diabetes, contributing to defective bone material quality. This review is one of a pair discussing the relationship between diabetes, bone and glucose-lowering agents; an accompanying review is provided in this issue of Diabetologia by Ann Schwartz (DOI: 10...
April 22, 2017: Diabetologia
https://www.readbyqxmd.com/read/28433555/systemic-application-of-sirolimus-prevents-neointima-formation-not-via-a-direct-anti-proliferative-effect-but-via-its-anti-inflammatory-properties
#5
Jan-Marcus Daniel, Jochen Dutzmann, Hannes Brunsch, Johann Bauersachs, Rüdiger Braun-Dullaeus, Daniel G Sedding
BACKGROUND: Systemic treatment with sirolimus, as used for immunosuppression in transplant patients, results in markedly low rates of in-stent restenosis. Since the underlying mechanisms remain obscure, we aimed to determine the molecular and cellular effects of systemic sirolimus treatment on vascular remodeling processes. METHODS AND RESULTS: Systemic sirolimus treatment significantly reduced smooth muscle cell (SMC) proliferation 14days after wire-induced injury and neointima formation 28days after injury in C57BL/6 mice, while simultaneously impairing re-endothelialization...
March 14, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28432597/t-regulatory-cells-in-bone-remodelling
#6
REVIEW
Aline Bozec, Mario M Zaiss
PURPOSE OF THE REVIEW: In this review, we present the role of regulatory T (Treg) cells in bone remodelling and bone-related disease such as osteoporosis or inflammatory bone loss. We also discuss the cellular and molecular mechanism how Treg cells regulate osteoclastogenesis. RECENT FINDINGS: Treg cells could regulate osteoclastogenesis by secreting TGF-β and IL-10 as well as IL-4 cytokines. Moreover, Treg cells can additionally regulate osteoclast differentiation, in a cell-to-cell contact via the cytotoxic T lymphocyte antigen (CTLA-4)...
April 21, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/28432595/what-animal-models-have-taught-us-about-the-safety-and-efficacy-of-bisphosphonates-in-chronic-kidney-disease
#7
REVIEW
Matthew R Allen, Mohammad W Aref
PURPOSE OF REVIEW: Bisphosphonates (BPs) have long been the gold-standard anti-remodeling treatment for numerous metabolic bone diseases. Since these drugs are excreted unmetabolized through the kidney, they are not recommended for individuals with compromised kidney function due to concerns of kidney and bone toxicity. The goal of this paper is to summarize the preclinical BP work in models of kidney disease with particular focus on the bone, kidney, and vasculature. RECENT FINDINGS: Summative data exists showing positive effects on bone and vascular calcifications with minimal evidence for bone or kidney toxicity in animal models...
April 21, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/28432379/high-resolution-tomography-based-quantification-of-cortical-porosity-and-cortical-thickness-at-the-surgical-neck-of-the-humerus-during-aging
#8
Tobias Helfen, Christoph M Sprecher, Ursula Eberli, Boyko Gueorguiev, Peter E Müller, Robert G Richards, Florian Schmidutz
Fractures of the proximal humerus are highly related to age and osteoporotic bone remodeling. Previous studies have highlighted the cortex as a major side of the bone loss, but the microstructural changes of the humerus have not been evaluated entirely. Sixty-four (n = 64) humeri of a representative collective (18-100 years) were scanned with high-resolution peripheral quantitative computed tomography (82 µm). Bone mineral density (BMD), trabecular bone volume fraction (Tb.BV/TV), cortical thickness (Ct...
April 21, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28428078/kinetic-reconstruction-reveals-time-dependent-effects-of-romosozumab-on-bone-formation-and-osteoblast-function-in-vertebral-cancellous-and-cortical-bone-in-cynomolgus-monkeys
#9
Rogely Waite Boyce, Qing-Tian Niu, Michael S Ominsky
Romosozumab, a humanized monoclonal sclerostin antibody under development for the treatment of osteoporosis, has a unique mechanism of action on bone-increasing bone formation and decreasing bone resorption. The effects on bone formation are transient, eliciting a rapid increase in bone formation that attenuates with continued treatment. Although bone formation attenuates, bone mineral density (BMD) continues to increase. To explore potential tissue-level mechanisms that could contribute to a progressive increase in spine BMD, we used kinetic reconstruction techniques to examine the effects of romosozumab on modeling and remodeling units in vertebral cancellous bone from adult cynomolgus monkeys administered romosozumab for 10 and 28weeks...
April 18, 2017: Bone
https://www.readbyqxmd.com/read/28426240/influence-of-glenoid-defect-size-and-bone-fragment-size-on-the-clinical-outcome-after-arthroscopic-bankart-repair-in-male-collision-contact-athletes
#10
Shigeto Nakagawa, Tatsuo Mae, Kenji Yoneda, Kazutaka Kinugasa, Hiroyuki Nakamura
BACKGROUND: The usefulness of arthroscopic Bankart repair for collision/contact athletes has varied in previous reports. PURPOSE: To investigate the influence of glenoid rim morphologic characteristics on the clinical outcome after arthroscopic Bankart repair without additional reinforcement procedures in male collision/contact athletes, including athletes with a large glenoid defect. STUDY DESIGN: Case-control study; Level of evidence, 3...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28425622/targeted-disruption-of-nf1-in-osteocyte-increases-fgf23-and-osteoid-with-osteomalacia-like-bone-phenotype
#11
Nobuhiro Kamiya, Ryosuke Yamaguchi, Olumide Aruwajoye, Audrey Kim, Gen Kuroyanagi, Matthew Phipps, Naga Suresh Adapala, Jian Q Feng, Harry K W Kim
Neurofibromatosis type 1 (NF1, OMIM 162200), caused by NF1 gene mutations, exhibits multi-system abnormalities including skeletal deformities in humans. Osteocytes play critical roles in controlling bone modeling and remodeling. However, the role of neurofibromin, the protein product of the NF1 gene, in osteocytes is largely unknown. This study investigated the role of neurofibromin in osteocytes by disrupting Nf1 under the Dmp1-promoter. The conditional knockout (Nf1 cKO) mice displayed serum profile of a metabolic bone disorder with an osteomalacia-like bone phenotype...
April 20, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28425576/bone-marrow-adipose-and-lung-tissue-derived-murine-mesenchymal-stromal-cells-release-different-mediators-and-differentially-affect-airway-and-lung-parenchyma-in-experimental-asthma
#12
Soraia C Abreu, Mariana A Antunes, Debora G Xisto, Fernanda F Cruz, Vivian C Branco, Elga Bandeira, Jamil Zola Kitoko, Almair F de Araújo, Ludmilla Dellatorre-Texeira, Priscilla C Olsen, Daniel J Weiss, Bruno L Diaz, Marcelo M Morales, Patricia R M Rocco
Mesenchymal stromal cells (MSCs) from different sources have differential effects on lung injury. To compare the effects of murine MSCs from bone marrow (BM), adipose tissue (AD), and lung tissue (LUNG) on inflammatory and remodeling processes in experimental allergic asthma, female C57BL/6 mice were sensitized and challenged with ovalbumin (OVA) or saline (C). Twenty-four hours after the last challenge, mice received either saline (50 µl, SAL), BM-MSCs, AD-MSCs, or LUNG-MSCs (10(5) cells per mouse in 50 µl total volume) intratracheally...
April 20, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28425564/osteoblast-role-in-osteoarthritis-pathogenesis
#13
REVIEW
Nicola Maruotti, Addolorata Corrado, Francesco Paolo Cantatore
Even if osteoarthritis pathogenesis is still poorly understood, numerous evidences suggest that osteoblasts dysregulation plays a key role in osteoarthritis pathogenesis. An abnormal expression of OPG and RANKL has been described in osteoarthritis osteoblasts, which is responsible for abnormal bone remodeling and decreased mineralization. Alterations in genes expression are involved in dysregulation of osteoblast function, bone remodeling and mineralization, leading to osteoarthritis development. Moreover, osteoblasts produce numerous transcription factors, growth factors and other proteic molecules which are involved in osteoarthritis pathogenesis...
April 20, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28424660/ccl2-monocyte-chemoattractant-protein-1-and-parathyroid-hormone-action-on-bone
#14
REVIEW
Jawed Akhtar Siddiqui, Nicola C Partridge
Chemokines are small molecules that play a crucial role as chemoattractants for several cell types, and their components are associated with host immune responses and repair mechanisms. Chemokines selectively recruit monocytes, neutrophils, and lymphocytes and induce chemotaxis through the activation of G protein-coupled receptors. Two well-described chemokine families (CXC and CC) are known to regulate the localization and trafficking of immune cells in cases of injury, infection, and tumors. Monocyte chemoattractant protein 1 (MCP-1/CCL2) is one of the important chemokines from the CC family that controls migration and infiltration of monocytes/macrophages during inflammation...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28419519/deletion-of-a-distal-rankl-gene-enhancer-delays-progression-of-atherosclerotic-plaque-calcification-in-hypercholesterolemic-mice
#15
Sohel Shamsuzzaman, Melda Onal, Hillary C St John, J Wesley Pike
Receptor activator of NF-κB ligand (RANKL) is a TNFα-like cytokine which mediates diverse physiological functions including bone remodeling and immune regulation. RANKL has been identified in atherosclerotic lesions; however, its role in atherosclerotic plaque development remains elusive. An enhancer located 75kb upstream of the murine RANKL gene's transcription start site designated D5 is important for its calciotropic hormone- and cytokine-mediated expression. Here, we determined the impact of RANKL levels in atherosclerotic plaque development in the D5 enhancer-null (D5(-/-) ) mice in an atherogenic Apoe(-/-) background fed a high-fat diet (HFD)...
April 17, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28419442/characterization-of-runx2-phosphorylation-sites-required-for-tgf-%C3%AE-1-mediated-stimulation-of-matrix-metalloproteinase-13-expression-in-osteoblastic-cells
#16
B Arumugam, M Vairamani, N C Partridge, N Selvamurugan
Transforming growth factor-beta1 (TGF-β1), a highly abundant growth factor in skeletal tissues, stimulates matrix metalloproteinase-13 (MMP-13) expression in osteoblastic cells. MMP-13 plays a critical role in bone remodeling. Runx2, a bone transcription factor, is required for TGF-β1-mediated stimulation of MMP-13 expression in osteoblastic cells. In this study, the molecular mechanism responsible for TGF-β1-stimulation of MMP-13 expression via Runx2 in osteoblastic cells was elucidated. TGF-β1 stimulated the phosphorylation of Runx2 at serine amino acids, and ERK inhibition blocked this effect in rat (UMR106-01) and human (MG-63) osteoblastic cells...
April 17, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28417147/cortical-histomorphometry-of-the-human-humerus-during-ontogeny
#17
Rosie Pitfield, Justyna J Miszkiewicz, Patrick Mahoney
Modeling and remodeling are two key determinants of human skeletal growth though little is known about the histomorphometry of cortical bone during ontogeny. In this study, we examined the density and geometric properties of primary and secondary osteons (osteon area and diameter, vascular canal area and diameter) in subperiosteal cortical bone from the human humerus (n = 84) between birth and age 18 years. Sections were removed from the anterior midshaft aspect of humeri from skeletons. Age-at-death was reconstructed using standard osteological techniques...
April 17, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28414988/response-of-mandibular-condyles-of-juvenile-and-adult-rats-to-abnormal-occlusion-and-subsequent-exemption
#18
Guang Zeng, Bin Kuang, Wen-Xing Xun, Gao-Tong Ren, Ke-Wen Wei
OBJECTIVE: The adaptation capacities of the mandibular condyle in response to mechanical stimuli might be different between juveniles and adults, but has not been compared. This study aimed to investigate whether abnormal molar occlusion and subsequent molar extraction could lead to different remodeling responses in the mandibular condyles of juvenile and adult rats. METHODS: Abnormal molar occlusion (AMO) was established in the 5- and 16-wk old rats by moving their maxillary left and mandibular right third molars distally...
March 28, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28414870/three-dimensional-skeletal-mandibular-changes-associated-with-herbst-appliance-treatment
#19
B Q Souki, P L C Vilefort, D D Oliveira, I Andrade, A C Ruellas, M S Yatabe, T Nguyen, L Franchi, J A McNamara, L H S Cevidanes
OBJECTIVES: Three-dimensional evaluation of skeletal mandibular changes following Herbst appliance treatment. SETTING AND SAMPLE POPULATION: Retrospective case-control study, based on a sample size calculation. Twenty-five pubertal patients treated with Herbst appliance (HAG), and 25 matched Class II patients who received other non-orthopaedic dental treatments (CG). MATERIAL AND METHODS: Three-dimensional models were generated from pre-treatment (T0) and post-treatment (T1) cone beam computed tomograms...
May 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28414785/the-epstein-barr-virus-mir-bhrf1-1-targets-rnf4-during-productive-infection-to-promote-the-accumulation-of-sumo-conjugates-and-the-release-of-infectious-virus
#20
Jinlin Li, Simone Callegari, Maria G Masucci
Post-translational modification by the Small Ubiquitin-like Modifier (SUMO) regulates a variety of cellular functions, and is hijacked by viruses to remodel the host cell during latent and productive infection. Here we have monitored the activity of the SUMO conjugation machinery in cells productively infected with Epstein-Barr virus (EBV). We found that SUMO2/3 conjugates accumulate during the late phase of the productive virus cycle, and identified several viral proteins as bone fide SUMOylation substrates...
April 17, 2017: PLoS Pathogens
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