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https://www.readbyqxmd.com/read/28548682/arthrotomy-based-pre-clinical-models-of-particle-induced-osteolysis-a-systematic-review
#1
REVIEW
Meghan M Moran, Brittany M Wilson, Ryan D Ross, Amarjit S Virdi, D Rick Sumner
We completed a systematic literature review of in vivo animal models that use arthrotomy-based methods to study particle-induced peri-implant osteolysis. The purpose of the review was to characterize the models developed to date, to determine the questions addressed, to assess scientific rigor and transparency and to identify gaps in knowledge. We probed three literature databases (Medline, Embase and Scopus) and found 77 manuscripts that fit the search parameters. In the most recent 10 years, researchers mainly used rat and mouse models, whereas in the previous 20 years large animal, canine and rabbit models were more common...
May 26, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28548288/hypermineralization-and-high-osteocyte-lacunar-density-in-osteogenesis-imperfecta-type-v-bone-indicate-exuberant-primary-bone-formation
#2
Stéphane Blouin, Nadja Fratzl-Zelman, Francis H Glorieux, Paul Roschger, Klaus Klaushofer, Joan C Marini, Frank Rauch
In contrast to "classical" forms of Osteogenesis imperfecta (OI) types I to IV, caused by a mutation in COL1A1/A2, OI type V is due to a gain-of-function mutation in the IFITM5 gene, encoding the interferon-induced transmembrane protein 5, or bone-restricted ifitm-like protein (BRIL). Its phenotype distinctly differs from OI types I to IV by absence of blue sclerae and dentinogenesis imperfecta, by the occurrence of ossification disorders like hyperplastic callus and forearm interosseous membrane ossification...
May 26, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28548149/fluorous-tag-assisted-synthesis-of-bile-acid-bisphosphonate-conjugates-via-orthogonal-click-reactions-an-access-to-potential-anti-resorption-bone-drugs
#3
Chiara Massarenti, Olga Bortolini, Giancarlo Fantin, Dario Cristofaro, Daniele Ragno, Daniela Perrone, Elena Marchesi, Gianluca Toniolo, Alessandro Massi
The synthesis of a small collection of novel bile acid-bisphosphonate (BA-BP) conjugates as potential drug candidates is reported. The disclosed methodology relied on the installation of azide and thiol functionalities at the head and tail positions, respectively, of the BA scaffold and its subsequent decoration by orthogonal click reactions (copper-catalyzed azide-alkyne cycloaddition, thiol-ene or thiol-yne coupling) to introduce BP units and a fluorophore. Because of the troublesome isolation of the target conjugates by standard procedures, the methodology culminated with the functionalization of the BA scaffold with a light fluorous tag to rapidly and efficiently purify intermediates and final products by fluorous solid-phase extraction...
May 26, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28544780/spinal-metastatic-disease-a-review-of-the-role-of-the-multidisciplinary-team
#4
REVIEW
Mark Curtin, Robert P Piggott, Evelyn P Murphy, Sudarshan Munigangaiah, Joseph F Baker, John P McCabe, Aiden Devitt
Historically, a simple approach centered on palliation was applicable to the majority of patients with metastatic spinal disease. With advances in diagnosis and treatment, a more complicated algorithm has devolved requiring a multidisciplinary approach with institutional commitment and support. We performed a database review including pertinent articles exploring the multidisciplinary management of spinal metastatic disease. The wide variation in clinical presentation and tumor response to treatment necessitates a multidisciplinary approach that integrates the diagnosis and treatment of the cancer, symptom management, and rehabilitation for optimal care of patients with spinal metastases...
May 24, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28543135/bone-mineral-density-testing-and-bisphosphonate-and-oestrogen-prescribing-associated-with-depot-medroxyprogesterone-acetate-utilization-the-impact-of%C3%A2-the%C3%A2-boxed-warning
#5
E Eworuke, V Popat, D G Moeny
WHAT IS KNOWN AND OBJECTIVE: Depot medroxyprogesterone acetate (DMPA) prevents follicular maturation and ovulation, resulting in oestrogen deficiency. Oestrogen deficiency is particularly concerning as it is associated with decreases in bone mineral density (BMD) or bone mass. Widespread use of concurrent oestrogen or bisphosphonates with DMPA has been observed in a previous single-centre US study. The authors also reported that more than half of obstetrician-gynaecologists ordered BMD testing solely due to DMPA...
May 23, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28540506/assessing-the-feasibility-of-the-effectiveness-of-discontinuing-bisphosphonates-trial-a-pilot-study
#6
N C Wright, P J Foster, A S Mudano, J A Melnick, M E Lewiecki, W J Shergy, J R Curtis, G R Cutter, M I Danila, M L Kilgore, E C Lewis, S L Morgan, D T Redden, A H Warriner, K G Saag
The Effectiveness of Discontinuing Bisphosphonates (EDGE) study is a planned pragmatic clinical trial to guide "drug holiday" clinical decision making. This pilot study assessed work flow and feasibility of such a study. While participant recruitment and treatment adherence were suboptimal, administrative procedures were generally feasible and minimally disrupted clinic flow. INTRODUCTION: The comparative effectiveness of continuing or discontinuing long-term alendronate (ALN) on fractures is unknown...
May 24, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28540505/retrospective-evaluation-of-serum-ctx-levels-after-denosumab-discontinuation-in-patients-with-or-without-prior-exposure-to-bisphosphonates
#7
B Uebelhart, R Rizzoli, S L Ferrari
Discontinuation of denosumab (Dmab) therapy is associated with lower serum CTX levels in osteoporotic patients previously exposed to bisphosphonates compared to those who were not. INTRODUCTION: Discontinuation of Dmab therapy is followed by a transient increase of bone turnover markers (BTMs) above pretreatment values, together with accelerated bone loss, and potentially an increased risk of multiple vertebral fractures. Since a substantial proportion of patients discontinuing Dmab have previously been exposed to bisphosphonates (BPs), we hypothesized that previous BP therapy could attenuate this increase in bone turnover because of the prolonged biological effects of BPs on bone...
May 24, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28539165/drug-holidays-from-bisphosphonates-and-denosumab-in-postmenopausal-osteoporosis-emas-position-statement
#8
REVIEW
Panagiotis Anagnostis, Stavroula A Paschou, Gesthimani Mintziori, Iuliana Ceausu, Herman Depypere, Irene Lambrinoudaki, Alfred Mueck, Faustino R Pérez-López, Margaret Rees, Levent M Senturk, Tommaso Simoncini, John C Stevenson, Petra Stute, Florence A Trémollieres, Dimitrios G Goulis
BACKGROUND: Bisphosphonates and denosumab are used extensively in the treatment of postmenopausal osteoporosis. Despite their proven efficacy in the reduction of vertebral and non-vertebral fractures, their optimal duration of use has not been determined. The occurrence of adverse effects, such as osteonecrosis of the jaw (ONJ) and atypical femoral fractures (AFF), has raised the issue of bisphosphonate or denosumab discontinuation ("drug holiday") after a certain treatment period. AIM: To assess the effect of bisphosphonate and denosumab discontinuation on fracture risk, as well as its possible benefits in reducing the risk of adverse effects...
July 2017: Maturitas
https://www.readbyqxmd.com/read/28535898/treatment-of-postmenopausal-osteoporosis-a-literature-based-algorithm-for-use-in-the-public-health-care-system
#9
Ellen Luz Pereira Caires, Mailze Campos Bezerra, Ana Flávia Torquato de Araújo Junqueira, Sheila Márcia de Araújo Fontenele, Silvana Cristina de Albuquerque Andrade, Catarina Brasil d'Alva
Bisphosphonates are considered first-line agents in the treatment of postmenopausal osteoporosis based on extensive experience of use, safety, and proven efficacy in reducing vertebral, non-vertebral and femur fractures. However, post-marketing reports based on the treatment of millions of patients/year over lengthy periods of time have revealed the occurrence of initially unexpected adverse effects, such as osteonecrosis of the jaw and atypical femoral fracture, leading to the restriction of treatment duration with bisphosphonates by global regulatory agencies...
May 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/28535690/adherence-with-bisphosphonates-and-long-term-risk-of-hip-fractures-a-nested-case-control-study-using-real-world-data
#10
Varda Shalev, Sarah Sharman Moser, Inbal Goldshtein, Jingbo Yu, Clara Weil, Sophia Ish-Shalom, Vanessa Rouach, Gabriel Chodick
BACKGROUND: Hip fracture is a major complication of osteoporosis. Bisphosphonate medication is the mainstay of treatment for osteoporosis. However, concerns have been raised regarding the effectiveness of bisphosphonates in reducing hip fracture risk after long-term use, particularly among patients with suboptimal adherence. OBJECTIVE: To examine the association between adherence with bisphosphonate therapy and long-term risk of hip fracture. METHODS: Included in the present nested case-control study were osteoporotic women (n = 14 357) who initiated bisphosphonate therapy in 2000-2010 and were retrospectively followed for incident hip fracture through November 2014...
May 1, 2017: Annals of Pharmacotherapy
https://www.readbyqxmd.com/read/28535619/prevalence-and-incidence-of-osteoporotic-fractures-in-patients-on-long-term-glucocorticoid-treatment-for-rheumatic-diseases-the-glucocorticoid-induced-osteoporosis-tool-giotto-study
#11
M Rossini, O Viapiana, M Vitiello, N Malavolta, G La Montagna, S Maddali Bongi, O Di Munno, R Nuti, C U Manzini, C Ferri, L Bogliolo, A Mathieu, F Cantatore, A Del Puente, M Muratore, W Grassi, B Frediani, G Saviola, P Delvino, L Mirone, G Ferraccioli, G Tripi, I Piazza, D Gatti
Osteoporosis and fractures are common and invalidating consequences of chronic glucorticoid (GC) treatment. Reliable information regarding the epidemiology of GC induced osteoporosis (GIOP) comes exclusively from the placebo group of randomized clinical trials while observational studies are generally lacking data on the real prevalence of vertebral fractures, GC dosage and primary diagnosis. The objective of this study was to evaluate the prevalence and incidence of osteoporotic fractures and to identify their major determinants (primary disease, GC dosage, bone mineral density, risk factors, specific treatment for GIOP) in a large cohort of consecutive patients aged >21 years, on chronic treatment with GC (≥5 mg prednisone - PN - equivalent) and attending rheumatology centers located all over Italy...
May 22, 2017: Reumatismo
https://www.readbyqxmd.com/read/28535616/drug-induced-osteonecrosis-of-the-jaw-the-state-of-the-art
#12
A Fassio, F Bertoldo, L Idolazzi, O Viapiana, M Rossini, D Gatti
Osteonecrosis of the jaw (ONJ) is a rare adverse event of antiresorptive drugs such as bisphosphonates (BP) and denosumab (DMAb). The diagnosis of ONJ is considered in cases where exposed bone in the maxillofacial region does not heal within 8 weeks in a patient previously treated with an antiresorptive agent. In patients with osteoporosis, ONJ is reported as a very rare adverse event while in oncologic patients with bone metastases or malignant hypercalcemia the incidence is significantly higher (up to the 1-10% of the patients)...
May 22, 2017: Reumatismo
https://www.readbyqxmd.com/read/28535041/remarkably-stereospecific-utilization-of-atp-%C3%AE-%C3%AE-halomethylene-analogues-by-protein-kinases
#13
Feng Ni, Alvin Kung, Yankun Duan, Vivek Shah, Carolina Amador, Ming Guo, Xuegong Fan, Lin Chen, Yongheng Chen, Charles E McKenna, Chao Zhang
ATP analogues containing a CXY group in place of the α,β-bridging oxygen atom are powerful chemical probes for studying ATP-dependent enzymes. A limitation of such probes has been that conventional synthetic methods generate a mixture of diastereomers when the bridging carbon substitution is nonequivalent (X ≠ Y). We report here a novel method based on derivatization of a bisphosphonate precursor with a D-phenylglycine chiral auxiliary that enables preparation of the individual diastereomers of α,β-CHF-ATP and α,β-CHCl-ATP, which differ only in the configuration at the CHX carbon...
May 23, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28534161/autoantibodies-to-osteoprotegerin-are-associated-with-low-hip-bone-mineral-density-and-history-of-fractures-in-axial-spondyloarthritis-a-cross-sectional-observational-study
#14
Barbara Hauser, Sizheng Zhao, Micaela R Visconti, Philip L Riches, William D Fraser, Isabelle Piec, Nicola J Goodson, Stuart H Ralston
Osteoporosis is a recognised complication of axial spondyloarthritis (axSpA) and is thought to be due to functional impairment and the osteoclast-activating effects of proinflammatory cytokines. The development of autoantibodies to OPG (OPG-Ab) has been associated with severe osteoporosis and increased bone resorption in rheumatoid arthritis. In this study, we screened for the presence of OPG-Ab in axSpA and reviewed their clinical significance. We studied 134 patients, recruited from two centres in the United Kingdom...
May 22, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28532408/bone-turnover-and-periprosthetic-bone-loss-after-cementless-total-hip-arthroplasty-can-be-restored-by-zoledronic-acid-a-prospective-randomized-open-label-controlled-trial
#15
Tsan-Wen Huang, Chao-Jan Wang, Hsin-Nung Shih, Yuhan Chang, Kuo-Chin Huang, Kuo-Ti Peng, Mel S Lee
BACKGROUND: Although the loss of bone mineral density (BMD) after total hip arthroplasty (THA) is a known problem, it remains unresolved. This study prospectively examined the effect of zoledronic acid (ZA) on bone turnover and BMD after cementless THA. METHODS: Between January 2010 and August 2011, 60 patients who underwent cementless THA were randomly assigned to receive either ZA infusion or placebo (0.9% normal saline only) postoperatively. ZA was administered at 2 day and 1 year postoperatively...
May 22, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28529863/ceramic-biocomposites-as-biodegradable-antibiotic-carriers-in-the-treatment-of-bone-infections
#16
REVIEW
Jamie Ferguson, Michael Diefenbeck, Martin McNally
Local release of antibiotic has advantages in the treatment of chronic osteomyelitis and infected fractures. The adequacy of surgical debridement is still key to successful clearance of infection but local antibiotic carriers seem to afford greater success rates by targeting the residual organisms present after debridement and delivering much higher local antibiotic concentrations compared with systemic antibiotics alone. Biodegradable ceramic carriers can be used to fill osseous defects, which reduces the dead space and provides the potential for subsequent repair of the osseous defect as they dissolve away...
2017: J Bone Jt Infect
https://www.readbyqxmd.com/read/28529724/recent-advances-in-the-management-of-osteoporosis
#17
REVIEW
Seiji Fukumoto, Toshio Matsumoto
There has been substantial progress in the management of patients with osteoporosis and the prevention of osteoporotic fractures. Currently available strong anti-resorptive agents are bisphosphonates and an anti-receptor activator of nuclear factor-kappa B ligand (RANKL) antibody, denosumab. Although bisphosphonates and denosumab both inhibit bone resorption and prevent vertebral and non-vertebral fractures, their mechanisms of action are different. Whereas bisphosphonates' effects on bone mineral density and fracture peak around 3 to 5 years and become plateaued, those of denosumab are maintained for up to 10 years...
2017: F1000Research
https://www.readbyqxmd.com/read/28528283/poly-vinyl-alcohol-hydroxyapatite-monolithic-in-needle-extraction-mine-device-preparation-and-examination-of-drug-affinity
#18
Monika Pietrzyńska, Michał Czerwiński, Adam Voelkel
Polymer-ceramic materials based on poly(vinyl alcohol) (PVA) and hydroxyapatite were applied as sorption material in Monolithic In-Needle Extraction (MINE) device. The presented device provides new possibilities for the examination of bisphosphonates affinity for bone and will be a helpful tool in evaluation of potential antiresorptive drugs suitability. A ceramic part of monoliths was prepared by incorporation of hydroxyapatite (HA) into the reaction mixture or by using a soaking method (mineralization of HA on the PVA)...
May 17, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28527518/effectiveness-of-treatments-for-medication-related-osteonecrosis-of%C3%A2-the-jaw-a-systematic-review-and-meta-analysis
#19
REVIEW
Mohamed El-Rabbany, Adam Sgro, David K Lam, Prakeshkumar S Shah, Amir Azarpazhooh
BACKGROUND: The effectiveness of management strategies used for the treatment of medication-related osteonecrosis of the jaw (MRONJ) remains poorly understood. The authors evaluated systematically the effectiveness of the various treatment modalities used for MRONJ. TYPES OF STUDIES REVIEWED: The authors conducted a comprehensive search of MEDLINE, Embase, the Cochrane Library, and Scopus to identify randomized controlled trials, nonrandomized controlled trials, and prospective cohort studies to evaluate comparatively the effectiveness of management strategies for the treatment of MRONJ...
May 18, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28525684/223ra-dichloride-response-in-a-patient-with-paget-disease-and-bone-metastases-secondary-to-castration-resistant-prostate-cancer
#20
Lina García Cañamaque, Cristina Rioja Parada, Paloma García De la Peña
PURPOSE: Paget disease is commonly asymptomatic and discovered when an imaging test is performed for another clinical indication or when elevated serum alkaline phosphatase is found. Bone pain usually appears late in the disease process and is only present in a minority of patients. For diagnosis, X-ray and bone scan are the most recommended imaging methods; radionuclide imaging of the skeleton has become the standard, since it is the most sensitive test for detecting increased bone activity...
May 18, 2017: Tumori
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