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https://www.readbyqxmd.com/read/29333689/2d-black-phosphorus-reinforced-3d-printed-scaffolds-a-stepwise-countermeasure-for-osteosarcoma
#1
Bowen Yang, Junhui Yin, Yu Chen, Shanshan Pan, Heliang Yao, Youshui Gao, Jianlin Shi
With the ever-deeper understanding of nano-bio interactions and the development of fabrication methodologies of nanomaterials, various therapeutic platforms based on nanomaterials have been developed for next-generation oncological applications, such as osteosarcoma therapy. In this work, a black phosphorus (BP) reinforced 3D-printed scaffold is designed and prepared to provide a feasible countermeasure for the efficient localized treatment of osteosarcoma. The in situ phosphorus-driven, calcium-extracted biomineralization of the intra-scaffold BP nanosheets enables both photothermal ablation of osteosarcoma and the subsequent material-guided bone regeneration in physiological microenvironment, and in the meantime endows the scaffolds with unique physicochemical properties favoring the whole stepwise therapeutic process...
January 15, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29322073/high-fat-high-sucrose-diet-results-in-higher-bone-mass-in-aged-rats
#2
Akira Minematsu, Yasue Nishii, Susumu Sakata
Intake of high-fat/high-sucrose (HFS) diet or high fat diet influences bone metabolism in young rodents, but its effects on bone properties of aged rodents still remain unclear. This study aimed to examine the effects of HFS diet intake on trabecular bone architecture (TBA) and cortical bone geometry (CBG) in aged rats. Fifteen male Wistar rats over 1 year were randomly divided into two groups. One group was fed a standard laboratory diet (SLD) and the other group was fed a HFS diet for six months. The femur/tibia, obtained from both groups at the end of experimental period, were scanned by micro-computed tomography for TBA/CBG analyses...
June 2018: Bone Reports
https://www.readbyqxmd.com/read/29321271/incremental-distribution-of-strontium-and-zinc-in-great-ape-and-fossil-hominin-cementum-using-synchrotron-x-ray-fluorescence-mapping
#3
Christopher Dean, Adeline Le Cabec, Kathryn Spiers, Yi Zhang, Jan Garrevoet
Cementum and the incremental markings it contains have been widely studied as a means of ageing animals and retrieving information about diet and nutrition. The distribution of trace elements in great ape and fossil hominin cementum has not been studied previously. Synchrotron X-ray fluorescence (SXRF) enables rapid scanning of large tissue areas with high resolution of elemental distributions. First, we used SXRF to map calcium, phosphorus, strontium and zinc distributions in great ape dentine and cementum...
January 2018: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/29318781/phosphonate-functionalized-poly-%C3%AE-amino-ester-macromers-as-potential-biomaterials
#4
Ece Akyol, Mirac Tatliyuz, Fatma Demir Duman, Melek Naz Guven, Havva Yagci Acar, Duygu Avci
Biodegradability, hemocompatibility, resistance to protein adsorption, and strong interactions with hydroxyapatite (HAP)-based tissues such as dentin, enamel, and bone are important properties of phosphorus-containing biomaterials. Here, novel phosphonate-functionalized poly(β-amino ester) (PBAE) macromers are synthesized through aza-Michael addition of various diacrylates [1,6-hexanediol diacrylate (HDDA), poly(ethylene glycol) diacrylate (PEGDA, Mn =575), 1,4-butanediol diacrylate (BDDA), 1,6-hexanediol ethoxylate diacrylate (HDEDA) and triethylene glycol diacrylate (TEGDA)] and a phosphonate-containing primary amine (diethyl 2-aminoethylphosphonate, A1) efficiently without any catalyst; where replacement of A1 with propyl amine (PA) served as control...
January 10, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29303615/effects-of-carbohydrase-enzyme-supplementation-on-performance-eggshell-quality-and-bone-parameters-of-laying-hens-fed-on-maize-and-wheat-based-diets
#5
O Olgun, Y Altay, Alp O Yildiz
1. This study was conducted to determine the effects of enzyme supplementation of maize/wheat-based diets on the performance, egg quality, and serum and bone parameters of laying hens. 2. During the 12-week experimental period, a total of 72 laying hens aged 52 weeks were randomly distributed among 6 experimental groups. Each experimental group contained 4 replicates, each with three birds. The experiment was a randomised design consisting of a 3×2 factorial arrangement, with three levels of wheat substitution and two levels of enzyme (xylanase: 1500...
January 5, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29285391/f18-fluorodeoxyglucose-positron-emission-tomography-computed-tomography-for-bone-hemangiopericytoma
#6
Yiyan Liu
Bone hemangiopericytoma (HPC) is extremely rare, and its clinical manifestations and radiographic features are nonspecific. There are few case reports about application of F18-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) in HPC. A total of four subjects with pathologically diagnosed bone HPC had FDG PET/CT for staging and/or restaging bone HPC. Medical records were retrospectively reviewed for radiological, pathological and follow-up information. All primary bone and metastatic lesions demonstrated high FDG avidity on PET/CT, which also revealed the adjacent soft tissue involvement and synchronous lesion...
December 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/29280738/genetic-causes-of-rickets
#7
Sezer Acar, Korcan Demir, Yufei Shi
Rickets is a metabolic bone disease that develops as a result of inadequate mineralization of growing bone due to disruption of calcium, phosphorus and/or vitamin D metabolism. Nutritional rickets remains a significant child health problem in developing countries. In addition, several rare genetic causes of rickets have also been described, which can be divided into two groups. The first group consists of genetic disorders of vitamin D biosynthesis and action, such as vitamin D-dependent rickets type 1A (VDDR1A), vitamin D-dependent rickets type 1B (VDDR1B), vitamin D-dependent rickets type 2A (VDDR2A), and vitamin D-dependent rickets type 2B (VDDR2B)...
December 27, 2017: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/29279718/lannea-acida-a-rich-anacardiaceae-ethanol-extract-exhibits-estrogenic-effects-and-prevents-bone-loss-in-an-ovariectomized-rat-model-of-osteoporosis
#8
Mouchili Riepouo Oumarou, Stéphane Zingue, Berlise Yengwa Bakam, Sylvin Benjamin Ateba, Simplice Harquin Foyet, Fritz Teddy Tchaptchet Mbakop, Dieudonné Njamen
Phytoestrogens have been shown to prevent postmenopausal osteoporosis. Lannea acida is a medicinal plant traditionally used in Cameroon to treat infertility, gynaecological complaints, and rheumatism. These uses prompted us to evaluate estrogenic activity of Lannea acida bark ethanolic extract and its antiosteoporotic potential in ovariectomized Wistar rats. In vitro, the E-screen assay was used to assess the ability of L. acida extract to induce MCF-7 cells proliferation. In vivo, a 3-day uterotrophic assay and a 12-week oral treatment in ovariectomized adult rats were carried out to evaluate the ability of L...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29279546/application-of-fluoridated-hydroxyapatite-thin-film-coatings-using-krf-pulsed-laser-deposition
#9
Yoshiya Hashimoto, Mamoru Ueda, Yu Kohiga, Kazuki Imura, Shigeki Hontsu
Fluoridated hydroxyapatite (FHA) was investigated for application as an implant coating for titanium bone substitute materials in dental implants. A KrF pulsed excimer deposition technique was used for film preparation on a titanium plate. The compacts were ablated by laser irradiation at an energy density of 1 J/cm2 on an area 1×1 mm2 with the substrate at room temparature. Energydispersive spectrometric analysis of the FHA film revealed peaks of fluorine in addition to calcium and phosphorus. X-ray diffraction revealed the presence of crystalline FHA on the FHA film after a 10 h post annealing treatment at 450°C...
December 27, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/29245308/total-parathyroidectomy-with-forearm-auto-transplantation-improves-the-quality-of-life-and-reduces-the-recurrence-of-secondary-hyperparathyroidism-in-chronic-kidney-disease-patients
#10
COMPARATIVE STUDY
Jia-Gen Li, Zhang-Sheng Xiao, Xian-Jie Hu, Yun Li, Xing Zhang, Song-Ze Zhang, Ai-Qin Shan
BACKGROUND: Our study aims to explore the effect of total parathyroidectomy (PTX) with forearm autotransplantation (FAT) on the quality of life and recurrence of secondary hyperparathyroidism (SHPT) in chronic kidney disease patients. METHODS: A total of 104 chronic kidney disease patients with SHPT were enrolled and divided into the PTX (n = 62) and PTX + FAT (n = 42) groups. The operation efficacy was evaluated by analyzing preoperative and postoperative values, including levels of intact parathyroid hormone (iPTH), serum phosphorus, serum calcium, alkaline phosphatase (ALP), calcium-phosphorus product, signs and symptoms, and MOS 36-item short-form health survey (SF-36) scores...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29242413/assisted-physical-exercise-for-improving-bone-strength-in-preterm-infants-less-than-35-weeks-gestation-a-randomized-controlled-trial
#11
Subhash Chandra Shaw, Mari Jeeva Sankar, Anu Thukral, Chandra Kumar Natarajan, Ashok K Deorari, Vinod K Paul, Ramesh Agarwal
OBJECTIVE: To the efficacy of daily assisted physical exercise (starting from one week of postnatal age) on bone strength at 40 weeks of post menstrual age to no intervention in infants born between 27 and 34 weeks of gestation. DESIGN: Open-label randomized controlled trial. SETTING: Tertiary-care teaching hospital in northern India from 16 May 2013 to 21 Nov 2013. PARTICIPANTS: 50 preterm neonates randomized to exercise group (n=26) or control group (n=24) during May to November, 2013...
December 14, 2017: Indian Pediatrics
https://www.readbyqxmd.com/read/29236646/evaluation-of-bone-mineral-density-bmd-and-indicators-of-bone-turnover-in-patients-with-hemophilia
#12
Mehmet Dagli, Ali Kutlucan, Sedat Abusoglu, Abdulkadir Basturk, Mehmet Sozen, Leyla Kutlucan, Ali Unlu, Farise Yilmaz
A decrease in bone mass is observed in hemophilic patients. The aim of this study was to evaluate bone mineral density (BMD), parathyroid hormone (PTH), 25-hydroxy vitamin D (vitamin D), and a bone formation and resorption marker, procollagen type I N-terminal propeptide (PINP) and urinary N-terminal telopeptide (uNTX) respectively, in hemophilic patients and healthy controls. Laboratory parameters related to the pathogenesis of bone loss such as neutrophil-lymphocyte ratio (NLR) and platelet-lymphocyte ratio (PLR) were also evaluated...
December 13, 2017: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29228439/beneficial-effects-of-low-level-laser-irradiation-on-senile-osteoporosis-in-rats
#13
C-T Zhu, T Li, P Zhang, M Zou, Q Guo, X-W Qu
OBJECTIVE: To investigate the effect of low-level laser irradiation (LLLI) on bone mineral density (BMD), bone structures, bone biomechanical properties and bone metabolism in senile osteoporosis, and to explore a relatively more secure and effective way to prevent and treat osteoporosis. MATERIALS AND METHODS: Sprague-Dawley (SD) male rats at different age stages (4 months old, 12 months old and 20 months old) were selected and randomly divided into six groups...
November 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29228060/model-of-hindlimb-unloading-in-adult-female-rats-characterizing-bone-physicochemical-microstructural-and-biomechanical-properties
#14
Melise Jacon Peres-Ueno, Camila Tami Stringhetta-Garcia, Robson Chacon Castoldi, Guilherme Akio Tamura Ozaki, Antônio Hernandes Chaves-Neto, Rita Cássia Menegati Dornelles, Mário Jefferson Quirino Louzada
Prolonged bedrest and microgravity induce alterations to bone, leading to bone fragility and compromising the quality of life. In this study, we characterized the physicochemical changes, microstructure, and biomechanics of the femurs of female adult rats in response to hindlimb unloading for 21 days. Twenty 6-month-old Wistar female rats were distributed into control (CON) and hindlimb unloading (HLU) groups. Analysis the in vivo bone mineral density (BMD) by dual energy x-ray absorptiometry (DXA) from the femurs was performed at the beginning and end of the experiment; plasma levels of calcium, phosphorus, and alkaline phosphatase, tartrate-resistant acid phosphatase activity, assessed by spectrophotometry, and estradiol, measured by enzyme-linked immunosorbent assay, was performed after the experiment...
2017: PloS One
https://www.readbyqxmd.com/read/29226342/calcium-chloride-enriched-calcium-aluminate-cement-promotes-in-vitro-osteogenesis
#15
L M S Castro-Raucci, L N Teixeira, A F S Barbosa, R R Fernandes, W Raucci-Neto, M Jacobovitz, I R Oliveira, P T de Oliveira
AIM: To evaluate the effects of 2.8% or 10% calcium chloride (CaCl2 ) in calcium aluminate cement (CAC) with either bismuth oxide (Bi2 O3 ) or zinc oxide (ZnO) as radiopacifiers on the progression of osteogenic cell cultures. METHODOLOGY: Rat calvaria-derived cells were grown on Thermanox® coverslips for 24 h and exposed to samples of 1) CACb: with 2.8% CaCl2 and 25% Bi2 O3 ; 2) CACb+: with 10% CaCl2 and 25% Bi2 O3 ; 3) CACz: with 2.8% CaCl2 and 25% ZnO; or 4) CACz+: with 10% CaCl2 and 25% ZnO, placed on inserts...
December 11, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/29216631/effect-of-cinacalcet-combined-with-calcitriol-on-the-clinical-outcome-and-bone-metabolism-in-patients-on-hemodialysis-with-severe-secondary-hyperparathyroidism
#16
Fang Yuan, Xing Chen, Chang Wang, Zheng Li, Hong Liu
OBJECTIVE: To observe the clinical outcome and the effect of bone metabolism of cinacalcet combined with calcitriol in maintenance hemodialysis (MHD) patients with severe secondary hyperparathyroidism (SHPT). METHODS: Thirty MHD patients with SHPT were enrolled into the study. All patients were given cinacalcet 25-75 mg and 0.5 μg calcitriol daily. Serum Ca, P, intact parathyroid hormone (iPTH), and bone metabolic markers were measured. The clinical symptoms and their changes were investigated...
December 7, 2017: Blood Purification
https://www.readbyqxmd.com/read/29207490/is-trabecular-bone-score-valuable-in-bone-microstructure-assessment-after-gastric-bypass-in-women-with-morbid-obesity
#17
Agustina Pia Marengo, Fernando Guerrero Pérez, Luis San Martín, Rosa Monseny, Anna Casajoana, Rocio Valera, Nuria Virgili, Andreu Simó Servat, Albert Prats, Carmen Gómez-Vaquero, Nuria Vilarrasa
INTRODUCTION: The effects of bariatric surgery on skeletal health raise many concerns. Trabecular bone score (TBS) is obtained through the analysis of lumbar spine dual X-ray absorptiometry (DXA) images and allows an indirect assessment of skeletal microarchitecture (MA). The aim of our study was to evaluate the changes in bone mineral density (BMD) and alterations in bone microarchitecture assessed by TBS in morbidly obese women undergoing Roux-en-Y gastric bypass (RYGB), over a three-year follow-up...
December 2, 2017: Nutrients
https://www.readbyqxmd.com/read/29207479/growth-and-bone-mineralization-of-very-preterm-infants-at-term-corrected-age-in-relation-to-different-nutritional-intakes-in-the-early-postnatal-period
#18
Michelle N Körnmann, Viola Christmann, Charlotte J W Gradussen, Laura Rodwell, Martin Gotthardt, Johannes B Van Goudoever, Arno F J Van Heijst
Preterm infants often have a reduced bone mineral content (BMC) with increased risk of metabolic bone disease. After birth it is difficult to supply calcium (Ca) and phosphorus (P) comparable to the high fetal accretion rate. It is not known whether high supplementation of minerals in the early postnatal period improves growth and bone mineralization. The aim of this study was to evaluate growth and bone mineralization at term corrected age (TCA) in very and extremely preterm infants who received different enteral Ca and P intakes during the first 10 days of life...
December 2, 2017: Nutrients
https://www.readbyqxmd.com/read/29198608/synthesis-and-evaluation-of-18f-hexafluorophosphate-as-a-novel-pet-probe-for-imaging-of-sodium-iodide-symporter-in-a-murine-c6-glioma-tumor-model
#19
Huailei Jiang, Aditya Bansal, Ribu Goyal, Kah-Whye Peng, Stephen J Russell, Timothy R DeGrado
Noninvasive imaging of iodide uptake via the sodium/iodide symporter (NIS) has received great interest for evaluation of thyroid cancer and reporter imaging of NIS-expressing viral therapies. In this study, we investigate 18F-labeled hexafluorophosphate (HFP or PF6-) as a high-affinity iodide analog for NIS imaging. 18F-HFP was synthesized by radiofluorination of phosphorus pentafluoride·N-methylpyrrolidine complex and evaluated in human NIS (hNIS)-expressing C6 glioma cells and a C6 glioma xenograft mouse model...
November 23, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29198231/effects-of-dietary-calcium-and-phosphorus-deficiency-and-subsequent-recovery-on-broiler-chicken-growth-performance-and-bone-characteristics
#20
A S Valable, A Narcy, M J Duclos, C Pomar, G Page, Z Nasir, M Magnin, M P Létourneau-Montminy
The ability of birds to modify dietary phosphorus utilisation when fed with low-phosphorus and calcium (Ca) diets was studied using different sequences of dietary phosphorus and Ca restriction (depletion) and recovery (repletion) during the grower and the finisher phases. A total of 3600 Ross 708 broilers were randomly divided into 10 replicate pens per treatment (60 per pen, six pens per block). Chicks were fed a common starter diet from days 0 to 10, then a grower control diet (C: 0.90% Ca, 0.39% non-phytate phosphorus, nPP), mid-level diet (M: 0...
December 4, 2017: Animal: An International Journal of Animal Bioscience
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