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Osteoporosis calcium

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https://www.readbyqxmd.com/read/29691807/glucocorticoid-induced-osteoporosis-an-update
#1
REVIEW
Juliet Compston
Glucocorticoid-induced osteoporosis is the most common secondary cause of osteoporosis and the resulting fractures cause significant morbidity. Following initiation of oral glucocorticoids, rapid bone loss occurs, and fracture risk increases within a few months in a dose-dependent manner. These adverse effects are due to inhibition of bone formation accompanied by an early but transient increase in bone resorption. Multiple mechanisms underlie these changes in bone remodeling; direct effects include upregulation of PPARγR2, increased expression of sclerostin and increased RANKL/OPG ratio, whilst hypogonadism, altered renal and intestinal calcium handling, and reduced production of insulin-like growth factor 1 also contribute...
April 24, 2018: Endocrine
https://www.readbyqxmd.com/read/29690515/acid-balance-dietary-acid-load-and-bone-effects-a-controversial-subject
#2
REVIEW
Lynda Frassetto, Tanushree Banerjee, Neil Powe, Anthony Sebastian
Modern Western diets, with higher contents of animal compared to fruits and vegetable products, have a greater content of acid precursors vs. base precursors, which results in a net acid load to the body. To prevent inexorable accumulation of acid in the body and progressively increasing degrees of metabolic acidosis, the body has multiple systems to buffer and titrate acid, including bone which contains large quantities of alkaline salts of calcium. Both in vitro and in vivo studies in animals and humans suggest that bone base helps neutralize part of the dietary net acid load...
April 21, 2018: Nutrients
https://www.readbyqxmd.com/read/29685509/rankl-mediated-osteoclastogenic-differentiation-of-macrophages-in-the-abdominal-aorta-of-angiotensin-ii-infused-apolipoprotein-e-knockout-mice
#3
Teruyoshi Tanaka, Matthew Kelly, Yuichiro Takei, Dai Yamanouchi
OBJECTIVE: Osteoclastogenic activation of macrophages (OCG) occurs in human abdominal aortic aneurysms (AAAs) and in calcium chloride-induced degenerative AAAs in mice, which have increased matrix metalloproteinase activity. As the activity of OCG in dissecting aneurysms is not clear, we tested the hypothesis that OCG contributes to angiotensin II (Ang II)-induced dissecting aneurysm (Ang II-induced AAA) in apolipoprotein E knockout mice. METHODS: AAAs were produced in apolipoprotein E knockout mice via the administration of Ang II...
April 20, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29680408/silicosis-decreases-bone-mineral-density-in-rats
#4
Zhang Hui, Xu Dingjie, Yuan Yuan, Wei Zhongqiu, Mao Na, Bei Mingjian, Gou Yu, Liu Guangyuan, Gao Xuemin, Li Shifeng, Geng Yucong, Yang Fang, Ross Summer, Xu Hong
Silicosis is the most common occupational lung disease in China, and is associated with a variety of complications, many of which are poorly understood. For example, recent data indicate that silicosis associates with the development of osteopenia, and in some cases this bone loss is severe, meeting criteria for osteoporosis. Although many factors are likely to contribute to this relationship, including a sedentary lifestyle in patients with advanced silicotic lung disease, we hypothesized that silica might directly reduce bone mineral density...
April 19, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29680147/discovery-and-development-of-calcimimetic-and-calcilytic-compounds
#5
Edward F Nemeth, Bradford C Van Wagenen, Manuel F Balandrin
The extracellular calcium receptor (CaR) is a G protein-coupled receptor (GPCR) and the pivotal molecule regulating systemic Ca2+ homeostasis. The CaR was a challenging target for drug discovery because its physiological ligand is an inorganic ion (Ca2+ ) rather than a molecule so there was no structural template to guide medicinal chemistry. Nonetheless, small molecules targeting this receptor were discovered. Calcimimetics are agonists or positive allosteric modulators of the CaR, while calcilytics are antagonists and all to date are negative allosteric modulators...
2018: Progress in Medicinal Chemistry
https://www.readbyqxmd.com/read/29677309/vitamin-d-calcium-or-combined-supplementation-for-the-primary-prevention-of-fractures-in-community-dwelling-adults-us-preventive-services-task-force-recommendation-statement
#6
David C Grossman, Susan J Curry, Douglas K Owens, Michael J Barry, Aaron B Caughey, Karina W Davidson, Chyke A Doubeni, John W Epling, Alex R Kemper, Alex H Krist, Martha Kubik, Seth Landefeld, Carol M Mangione, Michael Silverstein, Melissa A Simon, Chien-Wen Tseng
Importance: Because of the aging population, osteoporotic fractures are an increasingly important cause of morbidity and mortality in the United States. Approximately 2 million osteoporotic fractures occurred in the United States in 2005, and annual incidence is projected to increase to more than 3 million fractures by 2025. Within 1 year of experiencing a hip fracture, many patients are unable to walk independently, more than half require assistance with activities of daily living, and 20% to 30% of patients will die...
April 17, 2018: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/29677308/vitamin-d-calcium-or-combined-supplementation-for-the-primary-prevention-of-fractures-in-community-dwelling-adults-evidence-report-and-systematic-review-for-the-us-preventive-services-task-force
#7
Leila C Kahwati, Rachel Palmieri Weber, Huiling Pan, Margaret Gourlay, Erin LeBlanc, Manny Coker-Schwimmer, Meera Viswanathan
Importance: Osteoporotic fractures result in significant morbidity and mortality. Objective: To update the evidence for benefits and harms of vitamin D, calcium, or combined supplementation for the primary prevention of fractures in community-dwelling adults to inform the US Preventive Services Task Force. Data Sources: PubMed, EMBASE, Cochrane Library, and trial registries through March 21, 2017; references; and experts. Surveillance continued through February 28, 2018...
April 17, 2018: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/29674281/effects-of-tocotrienol-from-bixa-orellana-annatto-on-bone-histomorphometry-in-a-male-osteoporosis-model-induced-by-buserelin
#8
Nur-Vaizura Mohamad, Ima-Nirwana Soelaiman, Kok-Yong Chin
INTRODUCTION: Osteoporosis is a debilitating skeletal side effect of androgen deprivation therapy based on gonadotropin-releasing hormone (GnRH) agonist in men. Tocotrienol from Bixa orellana (annatto) has been demonstrated to offer protection against osteoporosis by exerting anabolic effects on bone. Thus, it may prevent osteoporosis among GnRH agonist users. OBJECTIVE: This study aimed to determine the effectiveness of annatto-tocotrienol on the bone turnover markers and bone histomorphometry in a model of male osteoporosis induced by buserelin (a GnRH agonist)...
April 16, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29672438/alterations-of-inflammatory-and-matrix-production-indices-in-celiac-disease-with-low-bone-mass-on-long-term-gluten-free-diet
#9
Michele Di Stefano, Manuela Bergonzi, Irene Benedetti, Mara De Amici, Cristina Torre, Natascia Brondino, Emanuela Miceli, Elisabetta Pagani, Gian L Marseglia, Gino R Corazza, Antonio Di Sabatino
BACKGROUND: A clinically meaningful impairment of bone mass secondary to malabsorption is frequent in untreated celiac disease. In adult patients, a rigorous gluten-free diet (GFD) significantly improves, but does not always normalize, bone mineral density (BMD). The reason for this marginal response is unclear. Accordingly, we evaluated the role of both local and systemic factors for bone loss in celiac patients on long-term GFD. STUDY: In a prospective cohort, 22 patients with low lumbar and/or femoral BMD and 22 with normal BMD underwent bone and mineral metabolism evaluation: we tested calcium, phosphate, parathyroid hormone, and vitamin D; telopeptide of type I collagen, a bone resorption index; propeptide of type I procollagen, a bone neoformation index; receptor antagonist of NF-kB ligand, an osteoclast-stimulating factor; osteoprotegerin (OPG), a decoy receptor for RANKL...
April 18, 2018: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/29665846/correlation-of-serum-levels-of-fibroblast-growth-factor-23-and-klotho-protein-levels-with-bone-mineral-density-in-maintenance-hemodialysis-patients
#10
Shubei Zheng, Yan Chen, Yu Zheng, Zhihong Zhou, Zhanyuan Li
OBJECTIVE: The correlation of serum fibroblast growth factor 23 (FGF-23) and Klotho protein levels with bone mineral density (BMD) in maintenance hemodialysis (MHD) patients was analyzed. METHODS: Between January 2015 and November 2015, 125 MHD patients in our hospital were enrolled. Dual-energy X-ray absorptiometry was used to examine the BMD in the femoral neck and lumbar spine of MHD patients. The patients were divided into three groups: a normal bone mass group, an osteopenia group, and an osteoporosis group...
April 17, 2018: European Journal of Medical Research
https://www.readbyqxmd.com/read/29662200/targeting-sphingosine-1-phosphate-lyase-as-an-anabolic-therapy-for-bone-loss
#11
Sarah Weske, Mithila Vaidya, Alina Reese, Karin von Wnuck Lipinski, Petra Keul, Julia K Bayer, Jens W Fischer, Ulrich Flögel, Jens Nelsen, Matthias Epple, Marta Scatena, Edzard Schwedhelm, Marcus Dörr, Henry Völzke, Eileen Moritz, Anke Hannemann, Bernhard H Rauch, Markus H Gräler, Gerd Heusch, Bodo Levkau
Sphingosine-1-phosphate (S1P) signaling influences bone metabolism, but its therapeutic potential in bone disorders has remained unexplored. We show that raising S1P levels in adult mice through conditionally deleting or pharmacologically inhibiting S1P lyase, the sole enzyme responsible for irreversibly degrading S1P, markedly increased bone formation, mass and strength and substantially decreased white adipose tissue. S1P signaling through S1P2 potently stimulated osteoblastogenesis at the expense of adipogenesis by inversely regulating osterix and PPAR-γ, and it simultaneously inhibited osteoclastogenesis by inducing osteoprotegerin through newly discovered p38-GSK3β-β-catenin and WNT5A-LRP5 pathways...
April 16, 2018: Nature Medicine
https://www.readbyqxmd.com/read/29658431/in-silico-identification-and-screening-of-cyp24a1-inhibitors-3d-qsar-pharmacophore-mapping-and-molecular-dynamics-analysis
#12
Jayaraj John Marshal, Gopinath Krishnasamy, Jung-Kul Lee, Karthikeyan Muthusamy
Vitamin D is a key signalling molecule that plays a vital role in the regulation of calcium-phosphate homeostasis and bone remodelling. The circulating biologically active form of vitamin D is regulated by the catabolic mechanism of cytochrome P450 24-hydroxylase (CYP24A1) enzyme. The over-expression of CYP24A1 negatively regulates the vitamin D level, which is the causative agent of chronic kidney disease, osteoporosis, and several types of cancers. In this study, we found three potential lead molecules adverse to CYP24A1 through structure-based, atom-based pharmacophore and e-pharmacophore-based screening methods...
April 16, 2018: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/29657025/physical-fitness-adiposity-and-diets-as-surrogate-measures-of-bone-health-in-schoolchildren-a-biochemical-and-cross-sectional-survey-analysis
#13
Ahmad H Alghadir, Sami A Gabr, Ashraf A Rizk
This study aimed to investigate the associations between adiposity, muscular fitness (MF), diet, sun exposure, and physical activity profiles as surrogate measures with bone health status in a sample of schoolchildren aged 8-18 yr old. A total of 250 Egyptian schoolchildren aged 8-18 yr were randomly invited to participate in these cross-sectional survey analyses. Calcaneal broadband ultrasound attenuation (c-BUA), bone mineral density (BMD), and bone formation markers (total calcium, serum bone alkaline phosphatase, and osteocalcin) were measured as markers of bone health...
March 21, 2018: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/29642719/impact-of-pharmacist-physician-collaboration-on-osteoporosis-treatment-rates
#14
Brandi L Bowers, Amy M Drew, Christian Verry
BACKGROUND: The vast majority of women at high risk for osteoporotic fractures are not treated, despite known significant clinical and economic consequences of this prevalent condition. To date, this is the first study of this size and duration to examine the role of pharmacists in management of osteoporosis in a family medicine clinic. OBJECTIVE: To compare the initiation or continuation of prescription antifracture therapy in high-risk patients with collaborative pharmacist-physician to physician-only management; secondarily, to evaluate recommendation rates for antifracture therapy and calcium and vitamin D...
April 1, 2018: Annals of Pharmacotherapy
https://www.readbyqxmd.com/read/29623754/bone-mineral-density-in-primary-care-patients-related-to-serum-calcium-concentrations-a-longitudinal-cohort-study-from-sweden
#15
Sofia Dalemo, Robert Eggertsen, Per Hjerpe, Erik G Almqvist, Kristina Bengtsson Boström
OBJECTIVE: Elevated calcium concentration is a commonly used measure in screening analyses for primary hyperparathyroidism (pHPT) and cancer. Low bone mineral density (BMD) and osteoporosis are common features of pHPT and strengthen the indication for parathyroidectomy. It is not known whether an elevated calcium concentration could be a marker of low BMD in suspected pHPT patients with a normal parathyroid hormone concentration. PURPOSE: To study if low BMD and osteoporosis are more common after ten years in patients with elevated compared with normal calcium concentrations at baseline...
April 6, 2018: Scandinavian Journal of Primary Health Care
https://www.readbyqxmd.com/read/29623238/the-effectiveness-of-osteoporosis-screening-and-treatment-in-the-midwest
#16
Dharmik Patel, John R Worley, David A Volgas, Brett D Crist
Introduction: With osteoporosis on the rise across the United States, the goal of this prospective study is to determine the effectiveness of our Midwest level-1 trauma center in diagnosing, treating, and educating osteoporosis patients after fracture with the use of questionnaires. Secondarily, we aimed to identify barriers that prevent our patients from complying with bone health recommendations. Methods: One hundred participants (≥55 years) were given 2 questionnaires (Fracture Risk Assessment Tool and a study-specific questionnaire) that were administered during the patient's visit to the orthopedic trauma clinic...
2018: Geriatric Orthopaedic Surgery & Rehabilitation
https://www.readbyqxmd.com/read/29614884/the-effectiveness-of-acupuncture-for-osteoporosis-a-systematic-review-and-meta-analysis
#17
Hong Pan, Rongjiang Jin, Mengxiao Li, Zhihong Liu, Qing Xie, Pu Wang
To summarise the existing evidence and evaluate the efficacy of acupuncture as a clinical treatment for osteoporosis. Six English and four Chinese databases were searched from their inception to April 2017. Randomized controlled trials were included, in which warm acupuncture, needling or electroacupuncture were compared with sole Western medicine with osteoporosis. All the data were assessed and extracted by two authors independently. The bias risk assessment recommended by the Cochrane Collaboration's tool was used to assess the quality of the selected studies...
April 4, 2018: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/29603039/could-use-of-selective-serotonin-reuptake-inhibitors-during-lactation-cause-persistent-effects-on-maternal-bone
#18
REVIEW
Samantha R Weaver, Laura L Hernandez
The lactating mammary gland elegantly coordinates maternal homeostasis to provide calcium for milk. During lactation, the monoamine serotonin regulates the synthesis and release of various mammary gland-derived factors, such as parathyroid hormone-related protein (PTHrP), to stimulate bone resorption. Recent evidence suggests that bone mineral lost during prolonged lactation is not fully recovered following weaning, possibly putting women at increased risk of fracture or osteoporosis. Selective Serotonin Reuptake Inhibitor (SSRI) antidepressants have also been associated with reduced bone mineral density and increased fracture risk...
March 30, 2018: Journal of Mammary Gland Biology and Neoplasia
https://www.readbyqxmd.com/read/29601566/-disturbances-of-calcium-metabolism-and-vitamin-d-supplementation-in-sarcoidosis-two-way-street
#19
REVIEW
Anna Kempisty, Anna Lewandowska, Jan Kuś
The role of vitamin D in the human body is not limited only to the regulation of calcium metabolism and secondary to the impact on bones. Recent studies have shown the influence of vitamin D level on muscles, on the risk of cancer, diabetes, hypertension and pulmonary diseases, including granulomatous diseases. Sarcoidosis is a granulomatous disease of unknown etiology. Hypercalcemia in the course of the disease occurs in up to 10% of cases in the consequence of autonomous overproduction of 1,25-dihydroxyvitamin D by macrophages of sarcoid granulomas...
March 27, 2018: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29600439/assessment-of-dietary-calcium-intake-of-university-students-a-pilot-study-in-turkey
#20
Semra Navruz-Varlı, Süleyman Köse, Tuğba Tatar, Sabriye Arslan, Eda Köksal
The aim of this study was to adapt the rapid assessment method (RAM) and International Osteoporosis Foundation Food Frequency Questionnaire (IOF FFQ) tools, used for the assessment of daily calcium intake in university students, and to compare the data obtained using 24-h recall (24-HR) data. There was a moderate positive correlation between the RAM and IOF. PURPOSE/INTRODUCTION: Calcium is an essential mineral that plays vital roles in metabolism and it is very important to accurately assess the amount of calcium intake on the diet...
March 30, 2018: Archives of Osteoporosis
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