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Bone research

Carlos Fernandez-Patron, Zamaneh Kassiri, Dickson Leung
Matrix metalloproteinase-2 (MMP-2) is a 72-kDa zinc- and calcium-dependent endopeptidase with intracellular and extracellular functions ranging from the modulation of extracellular matrix remodeling to cell growth and migration, angiogenesis, inflammation, and metabolism. An upregulation of MMP-2 activity has the potential to deregulate lipid metabolism through the cleavage of numerous metabolic mediators including plasma lipoproteins and cell surface receptors of lipoproteins. Paradoxically, MMP-2 deficiency induces inflammation and deregulates metabolism...
September 15, 2016: Comprehensive Physiology
A A Suriawati, Hazreen Abdul Majid, Nabilla Al-Sadat, Mohd Nahar Azmi Mohamed, Muhammad Yazid Jalaludin
BACKGROUND: Dietary calcium and vitamin D are essential for bone development. Apart from diet, physical activity may potentially improve and sustain bone health. OBJECTIVE: To investigate the relationship between the dietary intake of calcium and vitamin D, physical activity, and bone mineral content (BMC) in 13-year-old Malaysian adolescents. DESIGN: Cross-sectional. SETTING: Selected public secondary schools from the central and northern regions of Peninsular Malaysia...
October 24, 2016: Nutrients
I Raška, M Rašková, V Zikán, J Škrha
Type 2 diabetes mellitus (T2DM) is associated with increased fracture risk; the underlying mechanism remains unexplained. This study aimed to investigate the relationships between body composition and bone and glucose metabolism in postmenopausal women with T2DM. Dual-energy X-ray absorptiometry was used to measure bone mineral density (BMD) and body composition. A total of 68 postmenopausal women with T2DM and 71 controls were eligible for the study. In contrast to normal BMD in T2DM, a similar prevalence of low-trauma fractures was observed in both groups...
October 26, 2016: Physiological Research
Manasi Talwadekar, Sophia Fernandes, Vaijayanti Kale, Lalita Limaye
Mesenchymal stem cells (MSCs) are known to express a wide range of markers belonging to all the three lineages: mesodermal, ectodermal and endodermal. Therefore, the possibility of their transdifferentiation towards a neural lineage has been an aspect of active research. In the present study, MSCs were isolated from human placental tissue (P-MSC) and subjected them to neural differentiation. It was found that the P-MSCs differentiated towards neural lineage in appropriate differentiation conditions. However, when a histone deacetylase (HDAC) inhibitor - valproic acid (VPA) - was incorporated in the medium, there was a further increase in their neural differentiation potential...
October 25, 2016: Journal of Tissue Engineering and Regenerative Medicine
Ahmad Kotb, Antonina Klippert, Maria Daskalaki, Ulrike Sauermann, Christiane Stahl-Hennig, Berit Neumann
Granzyme B-expressing (GrB(+)) B cells are thought to contribute to immune dysfunctions in HIV patients, but so far their exact role is unknown. This report demonstrates for the first time the existence of GrB(+) B cells in SIV-infected rhesus macaques, which represent the most commonly used nonhuman primate model for HIV research. Similar to HIV patients, we found significantly higher frequencies of these cells in the blood of chronically SIV-infected rhesus monkeys compared with uninfected healthy ones. These frequencies correlated with plasma viral load and inversely with absolute CD4 T-cell counts...
October 25, 2016: Immunology and Cell Biology
Marie Eliade, Jeremy Skrzypski, Amandine Baurand, Caroline Jacquot, Geoffrey Bertolone, Catherine Loustalot, Charles Coutant, France Guy, Pierre Fumoleau, Yannis Duffourd, Laurent Arnould, Alexandra Delignette, Marie-Martine Padéano, Côme Lepage, Géraldine Raichon-Patru, Axelle Boudrant, Marie-Christine Bône-Lépinoy, Anne-Laure Villing, Aurélie Charpin, Karine Peignaux, Sandy Chevrier, Frédérique Vegran, François Ghiringhelli, Romain Boidot, Nicolas Sevenet, Sarab Lizard, Laurence Faivre
Until recently, the molecular diagnosis of hereditary breast and ovarian cancer (HBOC) was mostly based on BRCA1/2 testing. Next generation sequencing and the recent discovery of new genes involved in HBOC now permit the transfer of genomic capture targeting multiple candidate genes from research to clinical use. However, the implications for the management of patients and their families have not been extensively studied, in particular since some of these genes are not well-established cancer predisposing genes...
October 15, 2016: Oncotarget
Hirofumi Kato, Takuya Yamagishi, Tomoe Shimada, Tamano Matsui, Masayuki Shimojima, Masayuki Saijo, Kazunori Oishi
Although severe fever with thrombocytopenia syndrome (SFTS) was first reported from Japan in 2013, the precise clinical features and the risk factors for SFTS have not been fully investigated in Japan. Ninety-six cases of severe fever with thrombocytopenia syndrome (SFTS) were notified through the national surveillance system between April 2013 and September 2014 in Japan. All cases were from western Japan, and 82 cases (85%) had an onset between April and August. A retrospective observational study of the notified SFTS cases was conducted to identify the clinical features and laboratory findings during the same period...
2016: PloS One
M C Gouveia, J P Vella, F R Cafeo, F L Affonso Fonseca, M R Bacci
OBJECTIVE: Irisin is a muscle-secreted protein released into the circulation by cleavage of fibronectin type III domain containing protein 5(FNDC5). Since its discovery in 2012, it has been the subject of many researches due to its physiological role. It is believed that understanding irisin's function may be the key to comprehend many diseases and their development. The aim of this study is to perform a systematic review in order to establish whether there is an association of irisin's levels with obesity, diabetes mellitus, non-alcoholic steatohepatitis, chronic kidney disease and cancer in terms of prognosis...
October 2016: European Review for Medical and Pharmacological Sciences
Henrieta Škovierová, Eva Vidomanová, Silvia Mahmood, Janka Sopková, Anna Drgová, Tatiana Červeňová, Erika Halašová, Ján Lehotský
Homocysteine (Hcy) is a sulfur-containing non-proteinogenic amino acid derived in methionine metabolism. The increased level of Hcy in plasma, hyperhomocysteinemia, is considered to be an independent risk factor for cardio and cerebrovascular diseases. However, it is still not clear if Hcy is a marker or a causative agent of diseases. More and more research data suggest that Hcy is an important indicator for overall health status. This review represents the current understanding of molecular mechanism of Hcy metabolism and its link to hyperhomocysteinemia-related pathologies in humans...
October 20, 2016: International Journal of Molecular Sciences
Adewumi Adediran, Modu Baba Kagu, Tamunomieibi Wakama, Aliyu Ahmadu Babadoko, Dapus Obadiah Damulak, Sunday Ocheni, Marcus Inyama Asuquo
Background. Sickle cell anaemia (SCA) is an inherited condition whose clinical manifestations arise from the tendency of haemoglobin to polymerize and deform red blood cells into characteristic sickle shape. Allogeneic bone marrow transplantation offers a cure. The aim of this study was to determine the level of awareness, knowledge, and acceptance of this beneficial procedure in Nigeria. Materials and Methods. This multicentre cross-sectional study was conducted in 7 tertiary hospitals in Nigeria in 2015. Approval was obtained from each institution's research and ethics committee...
2016: Bone Marrow Research
Nghi C Nguyen, Muhammad Shah, Leonard J Appleman, Rahul Parikh, James M Mountz
Background and Purpose. Radium-223 dichloride (Xofigo®, Bayer HealthCare Pharmaceuticals Inc.) is the first α-particle emitter therapeutic agent approved by the FDA, with benefits in overall survival and delay in symptomatic skeletal event for patients with metastatic castrate-resistant prostate cancer (CRPC). Recent post hoc analyses of the phase III ALSYMPCA trial support the previously established safety profile as well as therapeutic effect and clinical outcome of Radium-223. Currently, Radium-223 is approved as a single agent therapy for metastatic CRPC...
2016: International Journal of Molecular Imaging
Y-C Huang, J Xiao, W Y Leung, W W Lu, Y Hu, K D Luk
Previous human study suggested that fresh-frozen intervertebral disc allograft transplantation can relieve neurological symptoms and restore segmental kinematics. Before wide clinical application, research into the pathophysiology of the postoperative disc allograft is needed. One important question that remains to be answered in disc allografting is the healing process of the host-graft interface and the subsequent change of the endplates. With the goat model for lumbar disc allografting, histology, micro-computed tomography analysis, scanning electron microscopy and energy-dispersive X-ray spectroscopy mapping were applied to evaluate the healing of the host-graft interfaces, the remodelling of subchondral bone, and the changes of the bony and cartilaginous endplates after transplantation...
October 19, 2016: European Cells & Materials
Sandra Camarero-Espinosa, Justin Cooper-White
Articular cartilage is a mechanically and structurally complex, lubricious tissue that permits load-bearing and frictionless movement of our joints upon articulation. Unfortunately, cartilage is unable to properly self-heal as a result of acute trauma or damage, resulting in many cases in significant pain, reduction in physical activity and quality of life for the patient. Due to the inability of resident cells to repair damaged osteochondral tissue, researchers have focused on utilizing endogenously or exogenously sourced cells (chondrocytes or tissue-derived mesenchymal stem cells), with or without scaffolds, to encourage the secretion of extracellular matrix (ECM) that replicates this highly anisotropic osteochondral tissue, in which the phenotype of the cells and the composition and orientation of the ECM varies along its depth...
October 19, 2016: International Journal of Pharmaceutics
Howa Begam, Samit Kumar Nandi, Biswanath Kundu, Abhijit Chanda
Bone morphogenetic proteins (BMPs) are the most significant growth factors that belong to the Transforming Growth Factor Beta (TGF-β) super-family. Though more than twenty members of this family have been identified so far in humans, Food and Drug Administration (FDA) approved two growth factors: BMP-2 and BMP-7 for treatments of spinal fusion and long-bone fractures with collagen carriers. Currently BMPs are clinically used in spinal fusion, oral and maxillofacial surgery and also in the repair of long bone defects...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Kimia Khoshroo, Tahereh S Jafarzadeh Kashi, Fathollah Moztarzadeh, Mohammadreza Tahriri, Hossein E Jazayeri, Lobat Tayebi
In this research, the three dimensional porous scaffolds made of a polycaprolactone (PCL) microsphere/TiO2 nanotube (TNT) composite was fabricated and evaluated for potential bone substitute applications. We used a microsphere sintering method to produce three dimensional PCL microsphere/TNT composite scaffolds. The mechanical properties of composite scaffolds were regulated by varying parameters, such as sintering time, microsphere diameter range size and PCL/TNT ratio. The obtained results ascertained that the PCL/TNT (0...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Daniel Navarro da Rocha, Leila Rosa de Oliveira Cruz, José Brant de Campos, Rubens L Santana Blazutti Marçal, Dindo Q Mijares, Paulo G Coelho, Marcelo H Prado da Silva
In this work, two solutions were developed: the first, rich in Ca(2+), PO4(3-) ions and the second, rich in Ca(2+), PO4(3-) and Mg(2+), defined as Mg-modified precursor solution. For each Mg-modified precursor solution, the concentrations of Mg(2+) ions were progressively increased by 5%, 10% and 15%wt. The aims of this research were to investigate the influence of magnesium ions substitution in calcium phosphate coatings on titanium surface and to evaluate these coatings by bioactivity assay in McCoy culture medium...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Benjamin Kearns, Abdullah Pandor, Matt Stevenson, Jean Hamilton, Duncan Chambers, Mark Clowes, John Graham, M Satish Kumar
As part of its single technology appraisal (STA) process, the National Institute for Health and Care Excellence (NICE) invited the company that manufactures cabazitaxel (Jevtana(®), Sanofi, UK) to submit evidence for the clinical and cost effectiveness of cabazitaxel for treatment of patients with metastatic hormone-relapsed prostate cancer (mHRPC) previously treated with a docetaxel-containing regimen. The School of Health and Related Research Technology Appraisal Group at the University of Sheffield was commissioned to act as the independent Evidence Review Group (ERG)...
October 22, 2016: PharmacoEconomics
Drew A Torigian, Judith Green-McKenzie, Xianling Liu, Frances S Shofer, Thomas Werner, Catherine E Smith, Andrew A Strasser, Mateen C Moghbel, Ami H Parekh, Grace Choi, Marcus D Goncalves, Natalie Spaccarelli, Saied Gholami, Prithvi S Kumar, Yubing Tong, Jayaram K Udupa, Clementina Mesaros, Abass Alavi
RATIONALE AND OBJECTIVES: The aim of this study was to assess the feasibility of (18)F-fluorodeoxyglucose (FDG)-positron emission tomography/computed tomography (PET/CT) to systematically detect and quantify differential effects of chronic tobacco use in organs of the whole body. MATERIALS AND METHODS: Twenty healthy male subjects (10 nonsmokers and 10 chronic heavy smokers) were enrolled. Subjects underwent whole-body FDG-PET/CT, diagnostic unenhanced chest CT, mini-mental state examination, urine testing for oxidative stress, and serum testing...
October 18, 2016: Academic Radiology
Guillermo M Wiemeyer, Miguel A Pérez, Laura Torres Bianchini, Luciano Sampietro, Guillermo F Bravo, N Luis Jácome, Vanesa Astore, Sergio A Lambertucci
Wildlife lead exposure is an increasing conservation threat that is being widely investigated. However, for some areas of the world (e.g., South America) and certain species, research on this subject is still scarce or only local information is available. We analyzed the extent and intensity of lead exposure for a widely distributed threatened species, the Andean Condor (Vultur gryphus). We conducted the study at two different scales: 1) sampling of birds received for rehabilitation or necropsy in Argentina, and 2) bibliographic review and extensive survey considering exposure event for the species' distribution in South America...
October 18, 2016: Environmental Pollution
Laura Prieto-Borja, Graciela Rodriguez-Sevilla, Alvaro Auñon, Concepción Pérez-Jorge, Enrique Sandoval, Joaquín Garcia-Cañete, Ignacio Gadea, Ricardo Fernandez-Roblas, Antonio Blanco, Jaime Esteban
BACKGROUND: The development of sonication protocols over the last few years has improved the sensitivity of conventional cultures for the diagnosis of prosthetic-joint infection (PJI). However, the development of a new, specifically designed kit for the molecular diagnosis of PJI could provide a major improvement in this field. METHODS: Prostheses retrieved from patients who underwent implant removal from May 2014 to May 2015 were sent for culture, and processed according to a previously defined protocol that included sonication...
October 18, 2016: Enfermedades Infecciosas y Microbiología Clínica
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