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Mineral bone disorder

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https://www.readbyqxmd.com/read/28734710/use-of-trabecular-bone-score-tbs-as-a-complementary-approach-to-dual-energy-x-ray-absorptiometry-dxa-for-fracture-risk-assessment-in-clinical-practice
#1
Enisa Shevroja, Olivier Lamy, Lynn Kohlmeier, Fjorda Koromani, Fernando Rivadeneira, Didier Hans
Osteoporosis is a common bone disease characterized by low bone mass and altered bone microarchitecture, resulting in decreased bone strength with an increased risk of fractures. In clinical practice, physicians can assess the risk of fracture for a patient based on several risk factors. Some such as age, weight, and history of fractures after 50 years of age, parental fracture, smoking status, and alcohol intake are incorporated into FRAX, an assessment tool that estimates the 10-year probability of hip fracture and major osteoporotic fractures based on the individual's risk factors profile...
July 19, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28733716/osteosarcopenia-where-bone-muscle-and-fat-collide
#2
REVIEW
H P Hirschfeld, R Kinsella, G Duque
As the world's population ages, the prevalence of chronic diseases increases. Sarcopenia and osteoporosis are two conditions that are associated with aging, with similar risk factors that include genetics, endocrine function, and mechanical factors. Additionally, bone and muscle closely interact with each other not only anatomically, but also chemically and metabolically. Fat infiltration, a phenomenon observed in age-related bone and muscle loss, is highly prevalent and more severe in sarcopenic and osteoporotic subjects...
July 22, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28728941/comparison-of-calcimimetic-r568-and-calcitriol-in-mineral-homeostasis-in-the-hyp-mouse-a-murine-homolog-of-x-linked-hypophosphatemia
#3
Maren Leifheit-Nestler, Julia Kucka, Emi Yoshizawa, Geert Behets, Patrick D'Haese, Christian Bergen, Martin Meier, Dagmar-Christiane Fischer, Dieter Haffner
X-linked hypophosphatemia (XLH) caused by mutations in the Phex gene is the most common human inherited phosphate wasting disorder characterized by enhanced synthesis of fibroblast growth factor 23 (FGF23) in bone, renal phosphate wasting, 1,25(OH)2D3 (1,25D) deficiency, rickets and osteomalacia. Here we studied the effects of calcimimetic R568 and calcitriol treatment in the Hyp mouse, a murine homolog of XLH. We hypothesized that mineral homeostasis is differentially affected by R568 and 1,25D with respect to the PTH-vitamin D-FGF23-Klotho axis and bone health...
July 18, 2017: Bone
https://www.readbyqxmd.com/read/28728874/profile-of-chronic-kidney-disease-related-mineral-bone-disorders-in-newly-diagnosed-advanced-predialysis-diabetic-kidney-disease-patients-a-hospital-based-cross-sectional-study
#4
S Ray, A M Beatrice, A Ghosh, S Pramanik, R Bhattacharjee, S Ghosh, A Raychaudhury, S Mukhopadhyay, S Chowdhury
AIM: Chronic kidney disease related-mineral bone disorder (CKD-MBD) has been poorly studied in pre-dialysis Indian CKD population. There are limited data on the pattern of these disturbances in diabetic CKD patients. Therefore, a study was conducted to find out the profile of mineral bone disorders in T2DM patients with pre-dialysis CKD. METHODS: In this cross-sectional design, diabetic patients with newly-diagnosed stage 4 and 5 CKD were evaluated. Serum levels of calcium, phosphorus, intact parathyroid hormone (iPTH), 25 hydroxy vitamin D and total alkaline phosphatase (ALP) were measured in all patients...
July 8, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28722515/construction-of-a-plga-based-targeted-sirna-delivery-system-for-treatment-of-osteoporosis
#5
Deniz Sezlev Bilecen, Jose Carlos Rodriguez-Cabello, Hasan Uludag, Vasif Hasirci
Osteoporosis is a systemic skeletal disorder which occurs when the bone turnover balance is disrupted. With the identification of the genes involved in the pathogenesis of the disease, studies on development of new osteoporosis treatments has intensified. RNA interference (RNAi) mechanism uses short interfering RNA (siRNA) to knockdown disease related gene expression as a treatment approach. Targeting while protecting siRNA against hydrolysis by nucleases in vivo is, however, challenging. The maintenance of therapeutic plasma level is also hampered by the clearance of siRNA from the body...
July 19, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28721611/bone-targeting-parathyroid-hormone-conjugates-outperform-unmodified-pth-in-the-anabolic-treatment-of-osteoporosis-in-rats
#6
Yang Yang, Ali Aghazadeh-Habashi, Arash Panahifar, Yuchin Wu, Krishna H Bhandari, Michael R Doschak
Synthetic parathyroid hormone (PTH) is clinically indicated for the treatment of osteoporosis, through its anabolic effects on parathyroid hormone receptors (PTHRs), located on osteoblast cells. However, the bioavailability of PTH for bone cells is restricted by the short half-life of PTH and the widespread distribution of PTHRs in non-skeletal tissues. To impart affinity for mineralized bone surfaces, bisphosphonate (BP)-mediated PTH analogues were synthesized, characterized, and evaluated in vitro and in vivo...
August 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28720774/a-novel-fluorescent-probe-based-flow-cytometric-assay-for-mineral-containing-nanoparticles-in-serum
#7
Edward R Smith, Tim D Hewitson, Michael M X Cai, Parisa Aghagolzadeh, Matthias Bachtler, Andreas Pasch, Stephen G Holt
Calciprotein particles, nanoscale aggregates of insoluble mineral and binding proteins, have emerged as potential mediators of phosphate toxicity in patients with Chronic Kidney Disease. Although existing immunochemical methods for their detection have provided compelling data, these approaches are indirect, lack specificity and are subject to a number of other technical and theoretical shortcomings. Here we have developed a rapid homogeneous fluorescent probe-based flow cytometric method for the detection and quantitation of individual mineral-containing nanoparticles in human and animal serum...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28714191/disordered-conformation-with-low-pii-helix-in-phosphoproteins-orchestrates-biomimetic-apatite-formation
#8
Melika Sarem, Steffen Lüdeke, Ralf Thomann, Pavel Salavei, Zhaoyong Zou, Wouter Habraken, Admir Masic, V Prasad Shastri
The interplay between noncollagenous proteins and biomineralization is widely accepted, yet the contribution of their secondary structure in mineral formation remains to be clarified. This study demonstrates a role for phosvitin, an intrinsically disordered phosphoprotein, in chick embryo skeletal development, and using circular dichroism and matrix least-squares Henderson-Hasselbalch global fitting, unravels three distinct pH-dependent secondary structures in phosvitin. By sequestering phosvitin on a biomimetic 3D insoluble cationic framework at defined pHs, access is gained to phosvitin in various conformational states...
July 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28710615/aldosterone-antagonist-therapy-and-its-relationship-with-inflammation-fibrosis-thrombosis-mineral-bone-disorder-and-cardiovascular-complications-in-peritoneal-dialysis-pd-patients
#9
Rafał Donderski, Paweł Stróżecki, Beata Sulikowska, Magdalena Grajewska, Ilona Miśkowiec, Anna Stefańska, Joanna Siódmiak, Grażyna Odrowąż-Sypniewska, Jacek Manitius
BACKGROUND: High aldosterone level may contribute to pathogenesis of hypertension, vessels damage and cardiovascular system deterioration in chronic kidney disease patients. Besides its classical action via mineralocorticoid receptor, aldosterone is also involved in cell growth, inflammation, oxidative stress, endothelial dysfunction and exerts fibroproliferative effects. The aim of the study was to assess whether aldosterone antagonist treatment may influence serum level of inflammatory, fibrosis, thrombosis and mineral-bone metabolism markers in peritoneal dialysis (PD) patients and blood pressure, aortic stiffness, echocardiographic indices after 12 months of treatment...
July 14, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28706946/chronic-kidney-disease-mineral-and-bone-disorder
#10
EDITORIAL
Wen-Chin Lee, Xiong-Zhong Ruan, You-Ying Chau, Jin-Bor Chen
No abstract text is available yet for this article.
2017: BioMed Research International
https://www.readbyqxmd.com/read/28705682/increased-bone-matrix-mineralization-in-treatment-na%C3%A3-ve-children-with-inflammatory-bowel-disease
#11
Barbara M Misof, Paul Roschger, Klaus Klaushofer, Frank Rauch, Jinhui Ma, David R Mack, Leanne M Ward
Inflammatory bowel disease (IBD) affects many organ systems including the skeleton. In children with IBD, bone mineral density (BMD) and bone turnover are frequently low. Disturbances in bone mineralization density distribution (BMDD) are linked to alterations in bone material strength; however, BMDD has not previously been reported in children with chronic inflammatory disorders. The aim of this study was to characterize BMDD based on quantitative backscatter electron imaging in cancellous (Cn.) and cortical (Ct...
July 10, 2017: Bone
https://www.readbyqxmd.com/read/28705021/atorvastatin-loaded-micelles-with-bone-targeted-ligand-for-the-treatment-of-osteoporosis
#12
Yonghui Xie, Xueying Tan, Jian Huang, Hongwei Huang, Ping Zou, Jingbo Hu
Osteoporosis is a common bone disorder where the declined bone mass is far more than normal physiological status and usually associated with enhanced fracture risk, reduced bone strength and even deteriorated quality of life. Recent studies showed that statins could exert beneficial effects on bones via promoting osteoblastic activity mediated by increased expression of bone morphogenetic protein 2 and also by suppressing osteoclast proliferation. In this study, we developed atorvastatin-loaded tetracycline-poly (ethylene glycol)-poly(lactic-co-glycolic acid) (TC-PEG-PLGA/ATO) micelles for the targeted treatment of osteoporosis...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28704404/pa21-a-novel-phosphate-binder-improves-renal-osteodystrophy-in-rats-with-chronic-renal-failure
#13
Atsushi Yaguchi, Satoshi Tatemichi, Hiroo Takeda, Mamoru Kobayashi
The effects of PA21, a novel iron-based and non-calcium-based phosphate binder, on hyperphosphatemia and its accompanying bone abnormality in chronic kidney disease-mineral and bone disorder (CKD-MBD) were evaluated. Rats with adenine-induced chronic renal failure (CRF) were prepared by feeding them an adenine-containing diet for four weeks. They were also freely fed a diet that contained PA21 (0.5, 1.5, and 5%), sevelamer hydrochloride (0.6 and 2%) or lanthanum carbonate hydrate (0.6 and 2%) for four weeks...
2017: PloS One
https://www.readbyqxmd.com/read/28703220/tumour-induced-osteomalacia
#14
REVIEW
Salvatore Minisola, Munro Peacock, Seijii Fukumoto, Cristiana Cipriani, Jessica Pepe, Sri Harsha Tella, Michael T Collins
Tumour-induced osteomalacia (TIO), also known as oncogenic osteomalacia, is a rare paraneoplastic disorder caused by tumours that secrete fibroblast growth factor 23 (FGF23). Owing to the role of FGF23 in renal phosphate handling and vitamin D synthesis, TIO is characterized by decreased renal tubular reabsorption of phosphate, by hypophosphataemia and by low levels of active vitamin D. Chronic hypophosphataemia ultimately results in osteomalacia (that is, inadequate bone mineralization). The diagnosis of TIO is usually suspected when serum phosphate levels are chronically low in the setting of bone pain, fragility fractures and muscle weakness...
July 13, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28699886/interleukin-1-inhibition-chronic-kidney-disease-mineral-and-bone-disorder-and-physical-function%C3%A2
#15
Kristen L Nowak, Adriana Hung, Talat Alp Ikizler, Heather Farmer-Bailey, Natjalie Salas-Cruz, Sudipa Sarkar, Andrew Hoofnagle, Zhiying You, Michel Chonchol
OBJECTIVE: Epidemiologic studies have suggested a link between chronic systemic inflammation and chronic kidney disease-mineral and bone disorder (CKD-MBD). Additionally, declining renal function is associated with worsening physical and cognitive function, which may potentially be explained by systemic inflammation, CKD-MBD, or both. We hypothesized that inhibiting inflammation with an interleukin-1 (IL-1) trap would improve markers of CKD-MBD as well as physical/cognitive function in patients with moderate-to-severe CKD...
July 12, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28695180/custom-hemiarthroplasties-for-retention-of-existing-hardware-associated-with-osteogenesis-imperfecta
#16
Kevin Nishida, Daniel Choi, Mathias Bostrom
Osteogenesis imperfecta is a rare genetic disorder that presents with heterogeneous phenotypes ranging from brittle bones to impaired hearing. Because of the decreased bone mineral density frequently observed in this patient population, many patients experience recurring and long-term fractures, which often require orthopaedic management. With the advancement of nonsurgical and surgical management and increased longevity of patients with osteogenesis imperfecta, the incidence of osteoarthritis has risen, presenting new orthopaedic challenges...
June 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/28693327/in-situ-examination-of-osteoblast-biomineralization-on-sulfonated-polystyrene-modified-substrates-using-fourier-transform-infrared-microspectroscopy
#17
Yizhi Meng, Meghan E Faillace, Kathryn Dorst, Samantha J Palmaccio, Lisa M Miller, Yi-Xian Qin
Osteoporosis is a skeletal disorder that is characterized by the loss of bone mineral density (BMD) resulting in increased risk of fracture. However, it has been shown that BMD is not the only indicator of fracture risk, as the strength of bone depends on a number of factors, including bone mass, architecture and material properties. Physiological mineral deposition requires the formation of a properly developed extracellular matrix (ECM), which recruits calcium and phosphate ions into the synthesis of apatite crystals...
July 10, 2017: Biointerphases
https://www.readbyqxmd.com/read/28689307/long-term-follow-up-in-osteogenesis-imperfecta-type-vi
#18
P Trejo, T Palomo, K Montpetit, F Fassier, A Sato, F H Glorieux, F Rauch
This retrospective study on long-term outcomes in osteogenesis imperfecta type VI found that patients who received intravenous bisphosphonate treatment had an increase in lumbar spine areal bone mineral density, a higher final height z-score, and some reshaping of vertebral bodies. INTRODUCTION: Osteogenesis imperfecta (OI) type VI is an ultra-rare bone fragility disorder caused by recessive mutations in SERPINF1. Here, we describe long-term outcomes in OI type VI and compare the clinical phenotypes caused by different types of SERPINF1 mutations...
July 9, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28688892/vascular-ossification-pathology-mechanisms-and-clinical-implications
#19
Michael A Fuery, Lusha Liang, Frederick S Kaplan, Emile R Mohler
In recent years, the mechanisms and clinical significance of vascular calcification have been increasingly investigated. For over a century, however, pathologists have recognized that vascular calcification is a form of heterotopic ossification. In this review, we aim to describe the pathology and molecular processes of vascular ossification, to characterize its clinical significance and treatment options, and to elucidate areas that require further investigation. The molecular mechanisms of vascular ossification involve the activation of regulators including bone morphogenic proteins and chondrogenic transcription factors and the loss of mineralization inhibitors like fetuin-A and pyrophosphate...
July 5, 2017: Bone
https://www.readbyqxmd.com/read/28684192/involvement-of-sphingosine-kinase-sphingosine-1-phosphate-metabolic-pathway-in-spondyloarthritis
#20
Carole Bougault, Alaeddine El Jamal, Anne Briolay, Saida Mebarek, Marie-Astrid Boutet, Thomas Garraud, Benoit Le Goff, Fréderic Blanchard, David Magne, Leyre Brizuela
Spondyloarthritis (SpA) is a relatively common chronic inflammatory joint disorder, with a prevalence of about 0.2-0.5% worldwide. The primary target of the pathological process is the enthesis, where tendons and ligaments attach to underlying bone. These insertion sites are hotspots of bone formation (enthesophytes), which can lead to ankylosis. Unfortunately, the mechanisms causing the onset and progression of entheseal ossification remain largely unknown. Sphingosine 1-phosphate (S1P), a lipid generated after sphingosine phosphorylation by sphingosine kinases 1 and 2 (SK1/2), plays important roles in cell proliferation, differentiation and survival...
July 3, 2017: Bone
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