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calcium phosphates

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https://www.readbyqxmd.com/read/29471153/the-prevalence-and-clinical-significance-of-postgastrectomy-anemia-in-patients-with-early-stage-gastric-cancer-a-retrospective-cohort-study
#1
Ji-Hyun Kim, You-Jin Bae, Kyong-Hwa Jun, Hyung-Min Chin
BACKGROUND: This study explored the cumulative incidence of anemia after gastrectomy in patients with early-stage gastric cancer and evaluated the relationship between postgastrectomy anemia and nutritional factors during long-term follow-up. METHODS: The medical records of patients with stage I gastric cancer who underwent curative gastrectomy between January 2006 and December 2013 were reviewed retrospectively. Hematologic parameters like hemoglobin, iron, ferritin, and vitamin B12 level were obtained prior to and after surgery with other nutritional parameters such as total protein, albumin, total cholesterol, triglyceride, calcium, and phosphate...
February 19, 2018: International Journal of Surgery
https://www.readbyqxmd.com/read/29469029/preclinical-evaluation-of-degradation-kinetics-and-elemental-mapping-of-first-and-second-generation-bioresorbable-magnesium-scaffolds
#2
Michael Joner, Philipp Ruppelt, Philine Zumstein, Capucine Lapointe-Corriveau, Guy Leclerc, Anna Bulin, Maria Isabel Castellanos, Eric Wittchow, Michael Haude, Ron Waksman
AIMS: Because vascular restoration therapy using bioresorbable vascular scaffolds (BRS) remains an appealing concept to restore vasoreactivity, understanding of biodegradation remains paramount during preclinical testing. METHODS AND RESULTS: Qualitative characterization of biodegradation was performed in 41 DREAMS 1G up to 3 years, while degradation kinetics were acquired in 54 DREAMS 2G implanted into porcine coronary arteries for 28, 90 and 180 days, 1 and 2 years...
February 20, 2018: EuroIntervention
https://www.readbyqxmd.com/read/29467541/inhibition-of-endo-lysosomal-function-exacerbates-vascular-calcification
#3
Yujun Cai, Xue-Lin Wang, Alyssa M Flores, Tonghui Lin, Raul J Guzman
Vascular calcification is a pathologic response to mineral imbalances and is prevalent in atherosclerosis, diabetes mellitus, and chronic kidney disease. When located in the media, it is highly associated with increased cardiovascular morbidity and mortality, particularly in patients on dialysis. Vascular calcification is tightly regulated and controlled by a series of endogenous factors. In the present study, we assess the effects of lysosomal and endosomal inhibition on calcification in vascular smooth muscle cells (VSMCs) and aortic rings...
February 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29467439/optimized-bone-regeneration-in-calvarial-bone-defect-based-on-biodegradation-tailoring-dual-shell-biphasic-bioactive-ceramic-microspheres
#4
Antian Xu, Chen Zhuang, Shuxin Xu, Fuming He, Lijun Xie, Xianyan Yang, Zhongru Gou
Bioceramic particulates capable of filling bone defects have gained considerable interest over the last decade. Herein, dual-shell bioceramic microspheres (CaP@CaSi@CaP, CaSi@CaP@CaSi) with adjustable beta-tricalcium phosphate (CaP) and beta-calcium silicate (CaSi) distribution were fabricated using a co-concentric capillary system enabling bone repair via a tailorable biodegradation process. The in vitro results showed the optimal concentration (1/16 of 200 mg/ml) of extracts of dual-shell microspheres could promote bone marrow mesenchymal cell (BMSC) proliferation and enhance the level of ALP activity and Alizarin Red staining...
February 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29467214/hepatic-transport-of-25-hydroxyvitamin-d-3-conjugates-a-mechanism-of-25-hydroxyvitamin-d-3-delivery-to-the-intestinal-tract
#5
Chunying Gao, Michael Z Liao, Lyrialle W Han, Kenneth E Thummel, Qingcheng Mao
Vitamin D3 is an important prohormone critical for maintaining calcium and phosphate homeostasis in the body and regulating drug-metabolizing enzymes and transporters. 25OHD3 , the most abundant circulating metabolite of vitamin D3 , is further transformed to the biologically active metabolite 1α,25-(OH)2 D3 by CYP27B1 in the kidney and extra-renal tissues, and to non-active metabolites by other CYP enzymes. In addition, 25OHD3 undergoes sulfonation and glucuronidation in the liver, forming two major conjugative metabolites, 25OHD3 -3- O -sulfate (25OHD3 -S) and 25OHD3 -3- O -glucuronide (25OHD3 -G), both of which were detected in human blood and bile...
February 21, 2018: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/29465875/-calcific-uremic-arteriolopathy-calciphylaxis-update-in-2018
#6
Cyrielle Alves, Thomas Ernandez, Catherine Stoermann Chopard
Calciphylaxis is a rare disease with a poor prognostic that mostly occurs in patients with renal failure. Diagnosis is difficult and skin biopsy is the gold standard diagnostic procedure, although it may aggravate skin lesions. Identification of the typical cutaneous signs is important to initiate adequate medical care. Several differential diagnoses must be excluded. Treatments should include appropriate pain management, local wound pain, daily dialysis, intravenous sodium thiosulfate treatment, hyperbaric oxygenotherapy, thigh control of calcium-phosphate metabolism and interruption of medications that could contribute to calciphylaxis...
February 21, 2018: Revue Médicale Suisse
https://www.readbyqxmd.com/read/29464848/corm-401-induces-calcium-signalling-no-increase-and-activation-of-pentose-phosphate-pathway-in-endothelial-cells
#7
Patrycja Kaczara, Bartosz Proniewski, Christopher Lovejoy, Kamil Kuś, Roberto Motterlini, Andrey Y Abramov, Stefan Chlopicki
Carbon monoxide-releasing molecules (CO-RMs) induce nitric oxide (NO) release (which requires NADPH), and Ca2+ -dependent signalling; however, their contribution in mediating endothelial responses is not clear. Here, we studied the effects of CO liberated from CORM-401 on NO production, calcium signalling and pentose phosphate pathway (PPP) activity in human endothelial cell line (EA.hy926). CORM-401 induced NO production and two types of calcium signalling: a peak-like calcium signal and a gradual increase in cytosolic calcium...
February 21, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29463771/stress-induced-factor-2-a-leucine-rich-repeat-kinase-regulates-basal-plant-pathogen-defense
#8
Ning Yuan, Shuangrong Yuan, Zhigang Li, Man Zhou, Peipei Wu, Qian Hu, Liangjiang Wang, Venugopal Mendu, Hong Luo
Protein kinases play fundamental roles in plant development and environmental stress responses. Here, we identified the STRESS INDUCED FACTOR (SIF) gene family, which encodes four leucine-rich repeat receptor-like protein kinases (LRR-RLKs) in Arabidopsis thaliana. The four genes, SIF1-4, are clustered in the genome and highly conserved, but have temporally and spatially distinct expression patterns. We employed Arabidopsis SIF knockout mutants and overexpression transgenics to examine SIF involvement during plant pathogen defense...
February 20, 2018: Plant Physiology
https://www.readbyqxmd.com/read/29463368/preparation-and-biocompatibility-evaluation-of-peg-pll-rgd-peg-dspe-phospholipid-cap-nanoparticles
#9
Jingwen Huang, Xiangyu Zhang, Zhihao Wu, Yufeng Wu, Xiaojie Wu, Yunguang Wang, Hao Jiang, Jing Ma, Zelai He
(Arginine-Glycine-Aspartic)-methoxy polyethylene glycol-(1,2-distearoyl-sn-glycero-3-phosphoethanolaMine-N) (abbreviation: RGD-PEG2000-DSPE or RGD-PD) was successfully synthesized and verified by 1H-NMR and MALDI-TOF MS. Polyethylene glycol-poly-L-lysine/RGD-PD/phospholipid/calcium phosphate nanoparticles (PEG-PLL/RGD-PD/PL/CaP NPs or MNPs) were prepared using a novel, simple method conducted at room temperature. Transmission electron microscopy (TEM) analysis showed that the MNPs were spheres of uniform size, with a diameter of ∼30 nm, and smooth surface...
January 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29462909/antimicrobial-peptides-for-topical-treatment-of-osteomyelitis-and-implant-related-infections-study-in-the-spongy-bone
#10
Pavel Melicherčík, Ondřej Nešuta, Václav Čeřovský
We examined the benefits of short linear α-helical antimicrobial peptides (AMPs) invented in our laboratory for treating bone infection and preventing microbial biofilm formation on model implants due to causative microorganisms of osteomyelitis. For this purpose, we introduced a model of induced osteomyelitis that utilizes human femur heads obtained from the hospital after their replacement with artificial prostheses. We found that the focus of the infection set up in the spongy part of this bone treated with AMP-loaded calcium phosphate cement was eradicated much more effectively than was the focus treated with antibiotics such as vancomycin or gentamicin loaded into the same cement...
February 16, 2018: Pharmaceuticals
https://www.readbyqxmd.com/read/29462711/exogenous-mineralization-of-hard-tissues-using-photo-absorptive-minerals-and-femto-second-lasers-the-case-of-dental-enamel
#11
A D Anastasiou, S Strafford, C L Thomson, J Gardy, T J Edwards, M Malinowski, S A Hussain, N K Metzger, A Hassanpour, C T A Brown, A P Brown, M S Duggal, A Jha
A radical new methodology for the exogenous mineralization of hard tissues is demonstrated in the context of laser-biomaterials interaction. The proposed approach is based on the use of femtosecond pulsed lasers (fs) and Fe3+ -doped calcium phosphate minerals (specifically in this work fluorapatite powder containing Fe2 O3 nanoparticles (NP)). A layer of the synthetic powder is applied to the surface of eroded bovine enamel and is irradiated with a fs laser (1040 nm wavelength, 1 GHz repetition rate, 150 fs pulse duration and 0...
February 17, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29461975/effect-on-growth-and-osteoblast-mineralization-of-hydroxyapatite-zirconia-ha-zro-2-obtained-by-a-new-low-temperature-system
#12
Bárbara Bermúdez-Reyes, María Del Refugio Lara-Banda, Elizabeth Reyes-Zarate, Augusto Rojas-Martínez, Alberto Camacho, Nidia Moncada-Saucedo, Vanessa Pérez-Silos, Alejandro García-Ruiz, Abel Guzmán-López, Víctor Peña-Martínez, Jorge Lara-Arias, Selem Torres-Méndez, Lizeth Fuentes-Mera
Ceramics and bioceramics, such as hydroxyapatite and zirconium, are used in bone tissue engineering. Hydroxyapatite has chemical properties similar to bone while zirconium offers suitable mechanical properties. The aim of this article is to evaluate the ability to support cell growth and osteoblastic mineralization of hydroxyapatite-zirconium obtained by a new system based on different low temperatures, such as 873 K (HZ600), 923 K (HZ650) and 973 K (HZ700). Hydroxyapatite-zirconia obtained by this new system was examined in terms of thermogravimetric features and x-ray diffractograms...
February 20, 2018: Biomedical Materials
https://www.readbyqxmd.com/read/29461365/alternatives-to-autologous-bone-graft-in-alveolar-cleft-reconstruction-the-state-of-alveolar-tissue-engineering
#13
Fan Liang, Hyuma Leland, Breanna Jedrzejewski, Allyn Auslander, Seija Maniskas, Jordan Swanson, Mark Urata, Jeffrey Hammoudeh, William Magee
Alveolar cleft reconstruction has historically relied on autologous iliac crest bone grafting (ICBG), but donor site morbidity, pain, and prolonged hospitalization have prompted the search for bone graft substitutes. The authors evaluated bone graft substitutes with the highest levels of evidence, and highlight the products that show promise in alveolar cleft repair and in maxillary augmentation. This comprehensive review guides the craniofacial surgeon toward safe and informed utilization of biomaterials in the alveolar cleft...
February 14, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29460012/issls-prize-in-basic-science-2018-growth-differentiation-factor-6-attenuated-pro-inflammatory-molecular-changes-in-the-rabbit-anular-puncture-model-and-degenerated-disc-induced-pain-generation-in-the-rat-xenograft-radiculopathy-model
#14
Shingo Miyazaki, Ashish D Diwan, Kenji Kato, Kevin Cheng, Won C Bae, Yang Sun, Junichi Yamada, Carol Muehleman, Mary E Lenz, Nozomu Inoue, Robert L Sah, Mamoru Kawakami, Koichi Masuda
PURPOSE: To elucidate the effects of growth differentiation factor-6 (GDF6) on: (i) gene expression of inflammatory/pain-related molecules and structural integrity in the rabbit intervertebral disc (IVD) degeneration model, and (ii) sensory dysfunction and changes in pain-marker expression in dorsal nerve ganglia (DRGs) in the rat xenograft radiculopathy model. METHODS: Forty-six adolescent rabbits received anular-puncture in two non-consecutive lumbar IVDs. Four weeks later, phosphate-buffered saline (PBS) or GDF6 (1, 10 or 100 µg) was injected into the nucleus pulposus (NP) of punctured discs and followed for 4 weeks for gene expression analysis and 12 weeks for structural analyses...
February 19, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29459980/diagnosis-evaluation-prevention-and-treatment-of-chronic-kidney-disease-mineral-and-bone-disorder-synopsis-of-the-kidney-disease-improving-global-outcomes-2017-clinical-practice-guideline-update
#15
Markus Ketteler, Geoffrey A Block, Pieter Evenepoel, Masafumi Fukagawa, Charles A Herzog, Linda McCann, Sharon M Moe, Rukshana Shroff, Marcello A Tonelli, Nigel D Toussaint, Marc G Vervloet, Mary B Leonard
Description: The Kidney Disease: Improving Global Outcomes (KDIGO) 2017 Clinical Practice Guideline Update for the Diagnosis, Evaluation, Prevention, and Treatment of Chronic Kidney Disease-Mineral and Bone Disorder (CKD-MBD) is a selective update of the prior CKD-MBD guideline published in 2009. The guideline update and the original publication are intended to assist practitioners caring for adults with CKD and those receiving long-term dialysis. Methods: Development of the guideline update followed an explicit process of evidence review and appraisal...
February 20, 2018: Annals of Internal Medicine
https://www.readbyqxmd.com/read/29459587/the-pattern-of-serum-calcium-phosphate-and-parathyroid-hormone-levels-in-pre-diagnosed-chronic-kidney-disease-patients
#16
M A Rouf, J U Sharif, M Khan, M R Karim, M M Rahman, H Ahmed, R Parveen, M S Islam, M N Farzana, M A Rahman
Chronic kidney disease (CKD) is an international health problem affecting 5-10% of the world population. Patients with chronic kidney disease were known to have higher prevalence of changes in serum calcium, phosphate and parathyroid hormone in Western countries, but data on the impact of CKD on serum calcium, phosphate and parathyroid hormone in our country are scarce. This cross-sectional type of descriptive study was conducted in the Department of Medicine, Mymensingh Medical College Hospital, Mymensingh, Bangladesh from March 2016 to September 2016...
January 2018: Mymensingh Medical Journal: MMJ
https://www.readbyqxmd.com/read/29459352/influence-of-calcium-and-phosphate-on-ph-dependency-of-arsenite-and-arsenate-adsorption-to-goethite
#17
Yingxuan Deng, Yongtao Li, Xiaojing Li, Yang Sun, Jie Ma, Mei Lei, Liping Weng
In the environment, simultaneous presence of arsenic (As) of different oxidation states is common, which hampers our understanding of As behavior. In the current study, the pH dependency of arsenite (As(III)) and arsenate (As(V)) adsorption to goethite under the influence of calcium (Ca2+ ) (as a major cation) and phosphate (PO4 3- ) (as a major anion) was studied, and the reliability of the CD-MUSIC model prediction was tested. The results show that the presence of the major ions led in general to a weaker and more complicated pH dependency of As adsorption...
February 7, 2018: Chemosphere
https://www.readbyqxmd.com/read/29459266/risk-factors-for-progression-of-coronary-artery-calcification-in-patients-with-chronic-kidney-disease-the-cric-study
#18
Joshua D Bundy, Jing Chen, Wei Yang, Matthew Budoff, Alan S Go, Juan E Grunwald, Radhakrishna R Kallem, Wendy S Post, Muredach P Reilly, Ana C Ricardo, Sylvia E Rosas, Xiaoming Zhang, Jiang He
BACKGROUND AND AIMS: Coronary artery calcification (CAC) is common among patients with chronic kidney disease (CKD) and predicts the risk for cardiovascular disease (CVD). We examined the associations of novel risk factors with CAC progression among patients with CKD. METHODS: Among 1123 CKD patients in the Chronic Renal Insufficiency Cohort (CRIC) Study, CAC was measured in Agatston units at baseline and a follow-up visit using electron beam computed tomography or multidetector computed tomography...
February 10, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29457598/in-vivo-biocompatibility-and-degradation-of-novel-polycaprolactone-biphasic-calcium-phosphate-scaffolds-used-as-a-bone-substitute
#19
Nuttawut Thuaksuban, Rungrot Pannak, Pleumjit Boonyaphiphat, Naruporn Monmaturapoj
BACKGROUND: Biocompatibility and degradation of poly ε-caprolactone (PCL)-Biphasic Calcium Phosphate (BCP) scaffolds fabricated by the "Melt Stretching and Compression Molding (MSCM)" technique were evaluated in rat models. OBJECTIVES: Degradation behaviors and histological biocompatibility of the PCL-20% BCP MSCM scaffolds and compare with those of PCL-20% β-tricalcium phosphate (TCP) scaffolds commercially fabricated by Fused Deposition Modeling (FDM) were evaluated...
2018: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/29457596/evaluation-of-osteoinductive-calcium-phosphate-ceramics-repairing-alveolar-cleft-defects-in-dog-model
#20
Jinfeng Yao, Haodong Chen, Qi Gao, Zhigang Liang
BACKGROUND: Alveolar cleft repair is an important step in the sequence of treatments for cleft lip and palate. Intrinsically osteoinductive materials have been the subject of research interest. OBJECTIVE: The aim of this study was to explore the use of osteoinductive biphasic calcium phosphate (BCP) ceramics to repair alveolar cleft defects in dogs. METHODS: We prepared two kinds of BCP ceramic with different physical characteristics: osteoinductive BCP (OBCP) and non-osteoinductive BCP (NBCP)...
2018: Bio-medical Materials and Engineering
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