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Osteoporosis calcium

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https://www.readbyqxmd.com/read/29052173/regulation-of-osteoblast-differentiation-and-iron-content-in-mc3t3-e1-cells-by-static-magnetic-field-with-different-intensities
#1
Jiancheng Yang, Jian Zhang, Chong Ding, Dandan Dong, Peng Shang
Many studies have indicated that static magnetic fields (SMFs) have positive effects on bone tissue, including bone formation and bone healing process. Evaluating the effects of SMFs on bone cell (especially osteoblast) function and exploring the mechanism, which is critical for understanding the possible risks or benefits from SMFs to the balance of bone remodeling. Iron and magnetic fields have the natural relationship, and iron is an essential element for normal bone metabolism. Iron overload or deficiency can cause severe bone disorders including osteoporosis...
October 19, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/29040219/effect-of-2-years-of-endurance-and-high-impact-training-on-preventing-osteoporosis-in-postmenopausal-women-randomized-clinical-trial
#2
Carmen García-Gomáriz, José M Blasco, Cecili Macián-Romero, Elías Guillem-Hernández, Celedonia Igual-Camacho
OBJECTIVE: The aim of the study was to analyze the effects of endurance and high-impact training oriented toward preventing osteoporosis in postmenopausal women with calcium and vitamin D supplementation. METHODS: This study was a randomized clinical trial. Thirty-six postmenopausal women were randomized to the control and experimental groups. Thirty-four women completed the 2-year interventions. The control group training involved walking at an intense pace. The experimental group conducted high-impact training specifically oriented to prevent osteoporosis...
October 16, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/29038837/reduced-kidney-function-is-associated-with-bmd-bone-loss-and-markers-of-mineral-homeostasis-in-older-women-a-10-year-longitudinal-study
#3
L Malmgren, F McGuigan, A Christensson, K E Akesson
Kidney function decreases with age; however, the long-term influence on bone density (BMD) in older women already at risk of osteoporosis is unknown. We followed kidney function and bone loss for 10 years. Declining kidney function was adversely associated with bone loss and mineral homeostasis in old women, though it attenuated with advanced aging. INTRODUCTION: Existing studies do not fully address the relationship between kidney function and bone metabolism with advanced aging in Caucasian women...
October 16, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/29038673/thiazides-and-osteoporotic-spinal-fractures-a-suspected-linkage-investigated-by-means-of-a-two-center-case-control-study
#4
Renato De Vecchis, Carmelina Ariano, Giuseppina Di Biase, Michel Noutsias
BACKGROUND: An alleged association of chronic use of thiazide diuretics with an increased risk of bone fragility fractures has been highlighted by a relatively recent prospective cohort study. However, the concept that thiazides exert a beneficial effect on osteoporosis is still a predominant view. This effect would be mediated by the decrease in renal clearance of calcium ions, a pharmacological feature recognized for a long time now to this class of drugs, as opposed to the increase in calcium urinary excretion attributed instead to loop diuretics, i...
November 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/29038394/factors-associated-with-lumbar-and-femoral-bone-mineral-density-in-kidney-transplants-candidates
#5
Mohammad Aghighi, Mitra Mahdavi Mazdeh, Mohsen Nafar, Vahid Rakhshan
INTRODUCTION: Data on risk factors associated with low bone mineral density are limited in patients with end-stage renal disease. This study evaluated the factors deemed associated with lumbar and femoral Z and T scores. MATERIALS AND METHODS: Clinical and demographic data of 98 patients waiting for kidney transplantation were collected, as well as lumbar and femoral bone densitometries, before transplantation. Osteoporosis and osteopenia and factors associated with bone mineral density were assessed...
October 2017: Iranian Journal of Kidney Diseases
https://www.readbyqxmd.com/read/29037307/effect-of-multiparity-on-bone-mineral-density-evaluated-with-bone-turnover-markers
#6
Hasan Terzi, Rabia Terzi, Ebru Kale, Ahmet Kale
OBJECTIVE: Our aim was to investigate the effect of parity on osteoporosis by evaluating bone mineral density, markers of bone turn-over and other factors that are effective in osteoporosis in multiparous (five deliveries or more) and nulliparous women in the post-menopausal period. METHODS: A total of 91 multiparous (five deliveries or more) and 31 nulliparous postmenopausal women were included in this study. All patients were interviewed on sociodemographic characteristics, gynecologic history, personal habits, levels of physical activity, and life-long intake of calcium...
September 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/29032463/kit-w-sh-mutation-prevents-cancellous-bone-loss-during-calcium-deprivation
#7
Sutada Lotinun, Jaijam Suwanwela, Suchit Poolthong, Roland Baron
Calcium is essential for normal bone growth and development. Inadequate calcium intake increases the risk of osteoporosis and fractures. Kit ligand/c-Kit signaling plays an important role in regulating bone homeostasis. Mice with c-Kit mutations are osteopenic. The present study aimed to investigate whether impairment of or reduction in c-Kit signaling affects bone turnover during calcium deprivation. Three-week-old male WBB6F1/J-Kit (W) /Kit (W-v) /J (W/W (v) ) mice with c-Kit point mutation, Kit (W-sh) /HNihrJaeBsmJ (W (sh) /W (sh) ) mice with an inversion mutation in the regulatory elements upstream of the c-Kit promoter region, and their wild-type controls (WT) were fed either a normal (0...
October 14, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/29032291/impact-of-an-osteoporosis-specialized-unit-on-bone-health-in-breast-cancer-survivals-treated-with-aromatase-inhibitors
#8
Purificación Martínez, Elena Galve, Virginia Arrazubi, M Ángeles Sala, Seila Fernández, Clara E Pérez, Juan F Arango, Iñaki Torre
OBJECTIVE: Considering the increased fracture risk in early breast cancer patients treated with aromatase inhibitors (AI), we assessed the impact of a preventive intervention conducted by a specialized osteoporosis unit on bone health at AI treatment start. MATERIAL AND METHODS: Retrospective cohort of postmenopausal women who started treatment with AI after breast cancer surgical/chemotherapy treatment and were referred to the osteoporosis unit for a comprehensive assessment of bone health...
October 11, 2017: Reumatología Clinica
https://www.readbyqxmd.com/read/29030130/behavioural-and-objective-vestibular-assessment-in-persons-with-osteoporosis-and-osteopenia-a-preliminary-investigation
#9
Aditi Gargeshwari, Raghav Hira Jha, Niraj Kumar Singh, Prawin Kumar
INTRODUCTION: Calcium is vital for the functioning of the inner ear hair cells as well as for the neurotransmitter release that triggers the generation of a nerve impulse. A reduction in calcium level could therefore impair the peripheric vestibular functioning. However, the outcome of balance assessment has rarely been explored in cases with osteopenia and osteoporosis, the medical conditions associated with reduction in calcium levels. OBJECTIVE: The present study aimed to investigate the impact of osteopenia and osteoporosis on the outcomes of behavioural and objective vestibular assessment tests...
September 21, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/29027270/the-yerba-mate-intake-has-a-neutral-effect-on-bone-a-case-control-study-in-postmenopausal-women
#10
Denise T A da Veiga, Raísa Bringhenti, Aline A Bolignon, Etiane Tatsh, Rafael N Moresco, Fabio V Comim, Melissa O Premaor
Nutritional factors have been associated with osteoporosis and fractures. The intake of coffee may increase the risk of fracture whereas the intake of black and green tea is associated with its reduction. Recently, consumption of yerba mate was associated with increased bone mineral density in postmenopausal women. Nonetheless, its influence on fracture is not known. The aim of this study was to evaluate the effect of yerba mate tea intake on fractures, bone markers, calcium homeostasis, and oxidative stress in postmenopausal women...
October 13, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29026938/global-dietary-calcium-intake-among-adults-a-systematic-review
#11
REVIEW
E M Balk, G P Adam, V N Langberg, A Earley, P Clark, P R Ebeling, A Mithal, R Rizzoli, C A F Zerbini, D D Pierroz, B Dawson-Hughes
Low calcium intake may adversely affect bone health in adults. Recognizing the presence of low calcium intake is necessary to develop national strategies to optimize intake. To highlight regions where calcium intake should be improved, we systematically searched for the most representative national dietary calcium intake data in adults from the general population in all countries. We searched 13 electronic databases and requested data from domain experts. Studies were double-screened for eligibility. Data were extracted into a standard form...
October 12, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/29024399/high-magnesium-prevents-matrix-vesicle-mediated-mineralization-in-human-bone-marrow-derived-mesenchymal-stem-cells-via-mitochondrial-pathway-and-autophagy
#12
Yaqiang Li, Jing Wang, Jiaji Yue, Yu Wang, Chunxi Yang, Quanjun Cui
Magnesium, as a physiological calcium antagonist, plays vital role in the bone metabolism and the balance between magnesium and calcium is crucial in bone physiology. We recently demonstrated that matrix mineralization in human bone marrow-derived mesenchymal stem cells (hBMSCs) can be suppressed by high Mg(2+) . However, a complete understanding of the mechanisms involved still remains to be elucidated. As mitochondrial calcium phosphate granules depletion manifests concurrently with the appearance of matrix vesicles (MVs) and autophagy are associated with matrix mineralization, we studied the effect of high extracellular Mg(2+) on these pathways...
October 10, 2017: Cell Biology International
https://www.readbyqxmd.com/read/29021920/vitamin-d-and-calcium-are-required-at-the-time-of-denosumab-administration-during-osteoporosis-treatment
#13
Yukio Nakamura, Takako Suzuki, Mikio Kamimura, Kohei Murakami, Shota Ikegami, Shigeharu Uchiyama, Hiroyuki Kato
To evaluate the differences in outcomes of treatment with denosumab alone or denosumab combined with vitamin D and calcium supplementation in patients with primary osteoporosis. Patients were split into a denosumab monotherapy group (18 cases) or a denosumab plus vitamin D supplementation group (combination group; 23 cases). We measured serum bone alkaline phosphatase (BAP), tartrate-resistant acid phosphatase (TRACP)-5b and urinary N-terminal telopeptide of type-I collagen (NTX) at baseline, 1 week, as well as at 1 month and 2, 4, 8 and 12 months...
2017: Bone Research
https://www.readbyqxmd.com/read/29021477/management-of-osteoporosis-in-chronic-kidney-disease
#14
Kosaku Nitta, Aiji Yajima, Ken Tsuchiya
Chronic kidney disease (CKD) patients with coexisting osteoporosis are becoming common. Many of the therapeutic agents used to treat osteoporosis are known to be affected by the renal function. It is generally thought that osteoporosis in G1 to G3 CKD patients can be treated as in non-CKD patients with osteoporosis. In stage 4 or more advanced CKD patients and CKD patients on dialysis with osteoporosis, however, bisphosphonates must be used with caution, bearing in mind the potential development of such disorders as adynamic bone disease...
October 11, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29021211/pfmg1-promotes-osteoblast-differentiation-and-prevents-osteoporotic-bone-loss
#15
Liyuan Li, Pan Wang, Kaiqiang Hu, Xiaoyan Wang, Wenping Cai, Chao Ai, Shangfeng Liu, Zhao Wang
Nacre is a widely used mineral medicine that has been reported to have beneficial effects in bone remodeling without an increase in inflammation. Water-soluble nacre matrix has been demonstrated to be responsible for the effect, yet core active ingredients are unknown. Pinctada fucata mantle gene 1 (PFMG1) was first discovered in the mantle tissue of Pinctada fucata. The protein has 2 EF-hands, a calcium-binding domain. PFMG1 protein can affect the growth of calcium carbonate crystals in vitro Here, we demonstrate that PFMG1 affects cell-cycle distribution and promotes preosteoblast proliferation...
October 11, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29019883/bone-mineral-density-changes-of-lumbar-spine-and-femur-in-osteoporotic-patient-treated-with-bisphosphonates-and-beta-hydroxy-beta-methylbutyrate-hmb-case-report
#16
Marcin R Tatara, Witold Krupski, Barbara Majer-Dziedzic
RATIONALE: Currently available approaches to osteoporosis treatment include application of antiresorptive and anabolic agents influencing bone tissue metabolism. The aim of the study was to present bone mineral density (BMD) changes of lumbar spine in osteoporotic patient treated with bisphosphonates such as ibandronic acid and pamidronic acid, and beta-hydroxy-beta-methylbutyrate (HMB). PATIENT CONCERNS: BMD and volumetric BMD (vBMD) of lumbar spine were measured during the 6 year observation period with the use of dual-energy X-ray absorptiometry (DEXA) and quantitative computed tomography (QCT)...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29017699/urinary-calcium-excretion-and-bone-turnover-in-osteoporotic-patients%C3%A2
#17
Amr El-Husseini, Amit Chakraborty, Qingcong Yuan, Saqib Inayatullah, Heather Bush, B Peter Sawaya
INTRODUCTION: It is well documented that patients with osteoporosis (OP) have high incidence of hypercalciuria (HC). However, the mechanism of HC in patients with OP is not well established. It is thought to be the result of high bone turnover (HBT) with excessive bone resorption. OP also frequently presents with low bone turnover (LBT). At this time, it is not clear whether OP with LBT is also associated with hypercalciuria. PURPOSE: The purpose of this study is to evaluate urinary calcium excretion in osteoporotic patients with HBT and LBT...
October 11, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28994642/reasons-for-not-treating-women-with-postmenopausal-osteoporosis-with-prescription-medications-physicians-and-patients-perspectives
#18
Jessica Papadopoulos Weaver, Kelly Olsson, Ravi Sadasivan, Ankita Modi, Shuvayu Sen
BACKGROUND: In the United States, between one-third and two thirds of postmenopausal women do not begin treatment with a prescription osteoporosis medication after a diagnosis of osteoporosis. The objective of this study was to understand the reasons for this lack of treatment. MATERIALS AND METHODS: Online physician and patient surveys were administered in 2013. The physician survey included a chart review of untreated postmenopausal women recently diagnosed with osteoporosis and gathered data on physicians' practices regarding the management of osteoporosis in postmenopausal women...
October 10, 2017: Journal of Women's Health
https://www.readbyqxmd.com/read/28993832/-diagnostics-and-treatment-of-primary-hyperparathyroidism
#19
C Nies
Primary hyperparathyroidism is a disease that occurs more frequently than generally thought and is often overlooked. Classical symptoms are bone pain and osteoporosis, renal calculi and peptic ulcers. Many patients are asymptomatic or have unspecific complaints. It is easy to establish the biochemical diagnosis based on calcium and parathormone (PTH) levels and 24-h urine calcium excretion. The most sensitive localization procedures for parathyroid adenomas are sonography and Tc-99(m)-MIBI scintigraphy. The indication for surgery is undisputed in symptomatic patients; however, there is controversy concerning patients without classical symptoms...
October 9, 2017: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
https://www.readbyqxmd.com/read/28989883/status-of-serum-vitamin-d-and-calcium-levels-in-women-of-reproductive-age-in-national-capital-territory-of-india
#20
Nighat Yaseen Sofi, Monika Jain, Umesh Kapil, Vuthaluru Seenu, Lakshmy Ramakrishnan, Chander Prakash Yadav, Ravindra Mohan Pandey
CONTEXT: In India, Vitamin D deficiency is a major public health problem, associated with lack of sunlight exposure in spite of abundant sunshine usually accompanied by reduced dietary intake. In women of reproductive age, Vitamin D deficiency in pregnancy has been associated with an increased risk of gestational diabetes mellitus, preeclampsia, maternal and perinatal morbidity and mortality. AIMS: The aim of the present cross-sectional study was to evaluate the levels of serum Vitamin D 25(OH) D and calcium in women of reproductive age from India...
September 2017: Indian Journal of Endocrinology and Metabolism
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