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Latest & greatest articles for calcium
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Changes With Lanthanum Carbonate, Calcium Acetate, and Phosphorus Restriction in CKD: AÂ Randomized Controlled Trial Abnormal phosphorus homeostasis develops early in chronic kidney disease (CKD). It is unclear if its correction results in improved clinical outcomes in non-dialysis dependent CKD.We conducted a randomized controlled, parallel design clinical trial in 120 patients with estimated glomerular filtration rate 15 to 59 ml/min per 1.73 m2 and abnormal phosphorus homeostasis (serum (...) phosphorus >4.6 mg/dl, parathyroid hormone [PTH] >70 pg/ml or tubular reabsorption of phosphorus [TRP] <80%). Patients were randomized to open-label lanthanum carbonate versus calcium acetate versus dietary intervention over 1 year. The co-primary outcomes were month 12 (vs. baseline) biochemical (serum phosphorus, TRP, PTH, calcium, bone-specific alkaline phosphatase [bALP], and fibroblast growth factor 23 [FGF23]) and vascular parameters (coronary artery calcium score, pulse wave velocity
Evaluation of calcium and magnesium contents in tooth enamel without any pathological changes: in vitro preliminary study Enamel is the structure that covers the entire clinical crown of a tooth. It enables to chew and crush food, and gives a final shape to the crowns of teeth. To evaluate calcium and magnesium contents in tooth enamel and analyse relationships between the study minerals extracted human permanent teeth were cut at every 150 microns and subjected into acid biopsy. The amounts (...) of calcium and magnesium were assessed in the laboratory using atomic absorption spectroscopy with an air/acetylene flame. The lowest calcium and magnesium contents were found on the enamel surface of the teeth. Statistically significant correlation between the calcium and magnesium concentrations was found at a depth between 150 and 900 µm. Calcium and magnesium contents increased with increasing enamel depth. Calcium and magnesium deposits appeared to be stable through all the enamel layers studied
An assessment of neuronal calcium sensor-1 and response to neoadjuvant chemotherapy in breast cancer patients Neuronal calcium sensor-1 (NCS-1) has been identified as a binding partner of the taxane, paclitaxel. Our previous study showed that overexpression of NCS-1 increased the efficacy of paclitaxel in vitro, but was associated with poor clinical outcome. Here, we determine if NCS-1 expression is associated with pathological complete response (pCR) to taxane-based neoadjuvant chemotherapy
Human cardiomyocyte calcium handling and transverse tubules in midâ€stage of postâ€myocardialâ€infarction heart failure Cellular processes in the heart rely mainly on studies from experimental animal models or explanted hearts from patients with terminal end-stage heart failure (HF). To address this limitation, we provide data on excitation contraction coupling, cardiomyocyte contraction and relaxation, and Ca2+ handling in post-myocardial-infarction (MI) patients at mid-stage of HF.Nine MI
Calcium pyrophosphate deposition Calcium pyrophosphate deposition - Symptoms, diagnosis and treatment | BMJ Best Practice You'll need a subscription to access all of BMJ Best Practice Search Calcium pyrophosphate deposition Last reviewed: February 2019 Last updated: March 2018 Summary Calcium pyrophosphate arthritis is caused by deposition of calcium pyrophosphate (CPP) crystals. It can be difficult to diagnose as CPP crystals in synovial fluids can be small, sparse, and difficult to find (...) . In patients <60 years of age, underlying metabolic conditions associated with calcium pyrophosphate deposition (CPPD), such as hyperparathyroidism or haemochromatosis, should be investigated. There is no definitive treatment for CPP arthritis but intra-articular corticosteroids can be effective for both acute and chronic forms. Definition Calcium pyrophosphate deposition (CPPD) is associated with both acute and chronic arthritis. Acute CPP crystal arthritis is an acute inflammatory arthritis of one
In vivo randomized trial of three marketed milk preparations enriched with calcium and vitamins (D and K) on bone mass and bone turnover markers from biological fluids in premenopausal Caucasian women. osteoporosis is a metabolic bone disease that leads to increased bone fragility and increased risk of fracture.the aim of the present research was to determine the effectiveness of a diary intake of three different dairy products (250 ml) enriched with vitamins and calcium on decreasing bone mass (...) . METHOS: the present study is a comparative trial of three dairy products fortified with calcium and vitamin D, parallel, randomized, double-blind andsingle-center. Bone mass content (BMC), bone mass density (BMD), T-score and Z-score were measured in different locations, besides biochemical markers along 18 months in premenopausal women. Two hundred and ten volunteers from all the three groups were submitted to the same monitoring procedures, consisting on blood extraction, urine collection
Evaluation of bone regeneration in periapical osseous defects with and without platelet rich plasma, combined calcium sulfate and autologous bone graftâ€‰-â€‰A comparative study. Osseous defects of the jaw occurs naturally by pathological conditions such as infections, tumors, cysts or iatrogenic causes induced during surgical treatment of preexisting periradicular bony pathologies. Management of these bone defects poses a great challenge for surgeons who are continually exploring ways to find (...) new modalities to improvise bone substitutes.To compare and evaluate bone regeneration with and without combining platelet rich plasma (PRP), calcium sulfate (CS) and autogenous bone graft in periapical defects of jaw.The study is a randomized prospective comparative study, in which 20 patients were assigned, with 10 patients each forming the study and control groups. In the first group (study group) the bone defect was filled with PRP, calcium sulfate and autologous bone graft. In the second
Calcium and Vitamin D Supplementation for Adults: Safety and Guidelines Calcium and Vitamin D Supplementation for Adults: Safety and Guidelines | CADTH.ca Find the information you need Calcium and Vitamin D Supplementation for Adults: Safety and Guidelines Calcium and Vitamin D Supplementation for Adults: Safety and Guidelines Last updated: June 7, 2018 Project Number: RB1229-000 Product Line: Research Type: Drug Report Type: Summary of Abstracts Result type: Report Question What (...) is the clinical evidence for the safety of calcium and vitamin D supplementation in adults? What are the evidence-based guidelines regarding the use of calcium and vitamin D supplements in the general adult population? Key Message Thirteen systematic reviews (seven with meta-analyses), 30 randomized controlled trials, and seven evidence based guidelines were identified regarding calcium and vitamin D supplementation in adults. Files Rapid Response Summary of Abstracts Published : June 7, 2018 Related Content
Association Between Calcium or Vitamin D Supplementation and Fracture Incidence in Community-Dwelling Older Adults: A Systematic Review and Meta-analysis. The increased social and economic burdens for osteoporosis-related fractures worldwide make the prevention of such injuries a major public health goal. Previous studies have reached mixed conclusions regarding the association between calcium, vitamin D, or combined calcium and vitamin D supplements and fracture incidence in older adults.To (...) investigate whether calcium, vitamin D, or combined calcium and vitamin D supplements are associated with a lower fracture incidence in community-dwelling older adults.The PubMed, Cochrane library, and EMBASE databases were systematically searched from the inception dates to December 24, 2016, using the keywords calcium, vitamin D, and fracture to identify systematic reviews or meta-analyses. The primary randomized clinical trials included in systematic reviews or meta-analyses were identified
Calcium channel blockers for primary and secondary Raynaud's phenomenon. Raynaud's phenomenon is a vasospastic disease characterized by digital pallor, cyanosis, and extremity pain. Primary Raynaud's phenomenon is not associated with underlying disease, but secondary Raynaud's phenomenon is associated with connective tissue disorders such as systemic sclerosis, systemic lupus erythematosus, and mixed connective tissue disease. Calcium channel blockers promote vasodilation and are commonly used (...) when drug treatment for Raynaud's phenomenon is required.To assess the benefits and harms of calcium channel blockers (CCBs) versus placebo for treatment of individuals with Raynaud's phenomenon with respect to Raynaud's type (primary vs secondary) and type and dose of CCBs.We searched the Cochrane Central Register of Controlled Trials (May 19, 2017), MEDLINE (1946 to May 19, 2017), Embase (1947 to May 19, 2017), clinicaltrials.gov, and the World Health Organization (WHO) International Clinical
Early marginal bone stability of dental implants placed in a transalveolarly augmented maxillary sinus: a controlled retrospective study of surface modification with calcium ions Recently, components of the extracellular cellular matrix have been assessed to enhance the biological response to dental implants. This study aims to assess the effect of surface modification with calcium ions on the early marginal bone loss of dental implants placed in a transalveolarly augmented maxillary sinus.A (...) implants had a Ca2+-modified hydrophilic surface, and 31 had no Ca2 (control). The experimental group showed a statistically significant lower marginal bone loss (0.36 ± 0.42 vs 0.61 ± 0.39 mm). However, there were no statistically significant differences in the implant survival. No implant failed in the experimental group while two implants failed in the control group.The modification of an acid-etched surface with calcium ions seems to reduce the marginal bone remodeling around the dental implants
Calcium Tartrate Tetrahydrate, Case Report of a Novel Human Kidney Stone Background: Calcium tartrate tetrahydrate has been reported as the main mineral in urinary stones in rats that have significant tartrate in their diet, but in humans, there has been only one mention of calcium tartrate stones in the form of bladder stone, and that case was in Africa. Case Presentation: Patient is a 34-year-old Caucasian male who presented with typical symptoms of nephrolithiasis. CT abd/pelvis (renal stone (...) protocol) revealed a 2 cm nonobstructing stone of the right renal pelvis. Patient underwent an uncomplicated right percutaneous nephrolithotomy and was noted to be stone free after surgery. Stone analysis was difficult with regard to determining composition, but was finally identified as calcium tartrate tetrahydrate. Conclusion: This was an unusual case, as this is the first recorded case of a calcium tartrate tetrahydrate outside of Africa. This type of stone had only been mainly described in rat
Tobacco plants expressing the maize nitrate transporter ZmNrt2.1 exhibit altered responses of growth and gene expression to nitrate and calcium Nitrate uptake is a highly regulated process. Understanding the intricate interactions between nitrate availability and genetically-controlled nitrate acquisition and metabolism is essential for improving nitrogen use efficiency and increasing nitrate uptake capacity for plants grown in both nitrate-poor and nitrate-enriched environments. In this report (...) , we introduced into tobacco (Nicotiana tabacum) the constitutively expressed maize high-affinity transporter ZmNrt2.1 gene that would bypass the tight control for the endogenous nitrate-responsive genes. By using calcium inhibitors and varying levels of NO3-, Ca2+ and K+, we probed how the host plants were affected in their nitrate response.We found that the ZmNrt2.1-expressing plants had better root growth than the wild type plants when Ca2+ was deficient regardless of the nitrate levels
Collagen and Calcium Binding EGF Domains 1 (CCBE1) in cancer â€“ a new role past lymphatics? 29344552 2018 11 13 2331-4737 4 11-12 2017 Nov Oncoscience Oncoscience Collagen and Calcium Binding EGF Domains 1 (CCBE1) in cancer - a new role past lymphatics? 168-169 10.18632/oncoscience.376 Mesci Aruz A Sunnybrook Research Institute, Toronto, Canada; Departments of Medical Biophysics and Radiation Oncology, University of Toronto, Toronto, Canada. Liu Stanley K SK Sunnybrook Research Institute
Coronary Artery Calcium Score for Long-term Risk Classification in Individuals With Type 2 Diabetes and Metabolic Syndrome From the Multi-Ethnic Study of Atherosclerosis Although the risk of type 2 diabetes is considered to be equivalent to coronary heart disease (CHD) risk, there is considerable heterogeneity among individuals for CHD and atherosclerotic cardiovascular disease (ASCVD) risk. It is not known whether coronary artery calcium (CAC) assessment at baseline in individuals
Comparison of the Coronary Artery Calcium Score and Number of Calcified Coronary Plaques for Predicting Patient Mortality Risk Multiple coronary artery calcium (CAC) parameters have recently been proposed to improve risk prediction in patients with intermediate clinical risk based on CAC scoring, but outcome data that assess these variables are relatively sparse. We analyzed data from 11,633 consecutive asymptomatic patients undergoing CAC scanning that were followed for 8.8 ± 3.5 years for all
Role of calcium in regulating the intra- and extracellular cleavage of von Willebrand factor by the protease ADAMTS13 von Willebrand factor (VWF) and the metalloprotease a disintegrin and metalloprotease with thrombospondin type 1 motif 13 (ADAMTS13) are present both within endothelial cells (ECs) and in peripheral blood. Calcium concentrations are lower in intracellular compartments (80-400 μM) compared with the extracellular milieu (∼1.25 mM). Because low calcium favors VWF A2-domain (...) proteolysis by ADAMTS13, the dependence of proteolysis rates on calcium was assayed both within ECs and in blood. Confocal microscopy studies demonstrate partial perinuclear colocalization of VWF with ADAMTS13 in human umbilical vein ECs (HUVECs). Consequently, low levels (5%-10%) of VWF cleavage products were detected in HUVEC lysates and also culture-supernatant following EC stimulation. This proteolysis occurred before disulfide bond formation. Compared with wild-type VWF A2-domain, calcium-binding