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Parathyroid hormone

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https://www.readbyqxmd.com/read/29677006/evidence-basis-for-integrated-management-of-mineral-metabolism-in-patients-with-end-stage-renal-disease
#1
Julia J Scialla
PURPOSE OF REVIEW: Treatment of mineral metabolism is a mainstay of dialysis care including some of its most widely used and costly pharmaceuticals. Although many mineral metabolites are associated with increased risk of mortality, cardiovascular disease, and other morbidities, few clinical trials are available to guide therapy and most focus on single drug approaches. In practice, providers manage many aspects of mineral metabolism simultaneously in integrated treatment approaches that incorporate multiple agents and changes in the dialysis prescription...
April 6, 2018: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/29674238/calcium-metabolism-serum-markers-in-adult-patients-with-epilepsy-and-the-effect-of-vitamin-d-supplementation-on-seizure-control
#2
Mario Tombini, Andrea Palermo, Giovanni Assenza, Giovanni Pellegrino, Antonella Benvenga, Chiara Campana, Anda Mihaela Naciu, Federica Assenza, Vincenzo Di Lazzaro
PURPOSE: To evaluate serum markers of calcium metabolism in adult patients with epilepsy (PWE) treated with antiepileptic drugs (AEDs) and the effect of vitamin D supplementation on seizure frequency. METHODS: Serum levels of calcium, phosphate, intact parathyroid hormone (iPTH) and 25-hydroxyvitamin D (25[OH]D) were compared in 160 PWE on chronic therapy with AEDs and 42 matched controls. Blood concentrations were analyzed taking into account the different features of epilepsy and treatment...
April 11, 2018: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29673407/hypercalcemia-as-a-rare-presentation-of-angioimmunoblastic-t-cell-lymphoma-a-case-report
#3
Sana Chams, Inaya Hajj Hussein, Skye El Sayegh, Nour Chams, Khalid Zakaria
BACKGROUND: Angioimmunoblastic T cell lymphoma is a rare malignancy, accounting for only 2% of all non-Hodgkin lymphomas, first described in the 1970s and subsequently accepted as a distinct entity in the current World Health Organization classification. Due to the paucity of this disease, there is still no identifiable etiology, no consistent risk factors, and the pathogenesis remains unclear. CASE PRESENTATION: An 83-year-old Caucasian man presented to an emergency department with palpitations and was found to have atrial fibrillation...
April 20, 2018: Journal of Medical Case Reports
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
#4
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/29672176/prevalence-and-risk-factors-for-vascular-calcification-in-chinese-patients-receiving-dialysis-baseline-results-from-a-prospective-cohort-study
#5
Zhi-Hong Liu, Xue-Qing Yu, Jun-Wei Yang, Ai-Li Jiang, Bi-Cheng Liu, Chang-Ying Xing, Ji-Zhuang Lou, Mei Wang, Hong Cheng, Jun Liu, Jun-Zhou Fu, Ai-Hua Zhang, Miao Zhang, Qiao-Ling Zhou, Chen Yu, Rong Wang, Li Wang, Yu-Qing Chen, Tian-Jun Guan, Ai Peng, Chen Nan, Chuan-Ming Hao, Xu-Yang Cheng
OBJECTIVE: With limited data available on calcification prevalence in chronic kidney disease (CKD) patients on dialysis, the China Dialysis Calcification Study (CDCS) determined the prevalence of vascular/valvular calcification (VC) and association of risk factors in Chinese patients with prevalent hemodialysis (HD) or peritoneal dialysis (PD). METHODS: CKD patients undergoing HD/PD for ≥6 months were enrolled. Prevalence data for calcification and medical history were documented at baseline...
April 19, 2018: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/29671936/influence-of-human-parathyroid-hormone-during-orthodontic-tooth-movement-and-relapse-in-the-osteoporotic-rat-model-a-preliminary-study
#6
H S Lee, H A Heo, S H Park, W Lee, S W Pyo
OBJECTIVE: To investigate the effects of parathyroid hormone (PTH) on tooth movement in ovariectomized (OVX) rats by comparing the tooth movement distance and relapse and by examining the alveolar bone microstructure. MATERIALS AND METHODS: Thirty 8-week-old female rats were classified into 3 groups: sham-operated, OVX and ovariectomized rats injected with PTH (PTH). Eight weeks later, a closed-coil spring appliance was placed between the maxillary incisor and the first molar and then activated with 50 cN of force...
April 19, 2018: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/29671909/should-phosphate-management-be-limited-to-the-kdigo-kdoqi-guidelines
#7
Sangeet Dhillon-Jhattu, Stuart M Sprague
Hyperphosphatemia is a common complication of CKD. Prior to development of overt hyperphosphatemia, there are several adaptive mechanisms that occur to maintain normal phosphorus equilibrium in patients with CKD. These include an early and progressive rise in fibroblast growth factor 23 (FGF 23), followed by an increase in parathyroid hormone (PTH) with a decrease in 1,25-dihydroxyvitamin D (1,25 Vit D). Over the last 20 years, a large number of studies have shown that hyperphosphatemia is a strong predictor of adverse clinical outcomes including increased incidence of vascular calcification, cardiovascular disease, and all-cause mortality in both individuals with CKD as well as those with normal kidney function...
April 19, 2018: Seminars in Dialysis
https://www.readbyqxmd.com/read/29670736/expression-of-parathyroid-hormone-related-protein-pthrp-in-ameloblastomas
#8
Rafael Zeballos, Ronell Bologna-Molina, Vanesa Pereira-Prado, Mariana Villarroel-Dorrego
Background: Presence of parathyroid hormone related protein (PTHrP) might suggest that ameloblastomas recapitulate features of the enamel epithelium and induce bone resorption, which would facilitate their growth and local invasion. The aim of this study was to determine the expression of PTHrP in ameloblastomas. Material and Methods: An observational research study was designed including 39 cases of histologically diagnosed ameloblastomas (39 out of 42 patients gave consent for the use of their medical records and all data required for this study)...
February 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29669938/canagliflozin-triggers-the-fgf23-1-25-dihydroxyvitamin-d-pth-axis-in-healthy-volunteers-in-a-randomized-crossover-study
#9
Jenny E Blau, Viviana Bauman, Ellen M Conway, Paolo Piaggi, Mary F Walter, Elizabeth C Wright, Shanna Bernstein, Amber B Courville, Michael T Collins, Kristina I Rother, Simeon I Taylor
BACKGROUND: Sodium glucose cotransporter-2 (SGLT2) inhibitors are the most recently approved class of drugs for type 2 diabetes and provide both glycemic efficacy and cardiovascular risk reduction. A number of safety issues have been identified, including treatment-emergent bone fractures. To understand the overall clinical profile, these safety issues must be balanced against an attractive efficacy profile. Our study was designed to investigate pathophysiological mechanisms mediating treatment-emergent adverse effects on bone health...
April 19, 2018: JCI Insight
https://www.readbyqxmd.com/read/29667913/ubiquitin-c-terminal-hydrolase-l1-deletion-is-associated-with-urinary-%C3%AE-klotho-deficiency-and-perturbed-phosphate-homeostasis
#10
Naomi C Boisvert, Chet E Holterman, Alexey Gutsol, Josee Coulombe, Wanling Pan, R Todd Alexander, Douglas A Gray, Chris R Kennedy
Loss of ubiquitin C-terminal hydrolase L1 (UCHL1), a deubiquitinating enzyme required for neuronal function, led to hyperphosphatemia accompanied by phosphaturia in mice, while calcium homeostasis remained intact. We therefore investigated the mechanisms underlying the phosphate imbalance in Uchl1-/- mice. Interestingly, phosphaturia was not a result of lower renal brush border membrane sodium-phosphate cotransporter expression as sodium-phosphate cotransporter 2a and 2c expression levels were similar to wild type levels...
April 18, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29667006/establishment-and-characterization-of-a-c57bl-6-mouse-model-of-bone-metastasis-of-breast-cancer
#11
Toru Hiraga, Tadashi Ninomiya
Bone is one of the most common sites of metastasis in patients with advanced breast cancer; however, the mechanisms of bone metastasis remain to be fully elucidated. Animal models are essential research tools for investigating the mechanisms of diseases and drug actions. To date, there have only been a few reports in which C57BL/6 mice were used for the study of bone metastases of breast cancer. In the current study, we found that intracardiac inoculation of C57BL/6 mouse-derived parental E0771 breast cancer cells (E0771/Pa) frequently lead to bone metastases in C57BL/6 mice within 2 weeks...
April 17, 2018: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/29666919/prevalence-of-vitamin-d-insufficiency-and-evidence-for-disease-prevention-in-the-older-population
#12
REVIEW
Julia Kühn, Paula Trotz, Gabriele I Stangl
The prevalence of vitamin D insufficiency, usually assessed by the analysis of circulating 25-hydroxyvitamin D (25[OH])D), is very high in the aging German population. An important factor that reduces endogenous vitamin D synthesis in older persons is physical inactivity or care-dependency that limits the time spent outside. Additionally, it has been suggested that the age-dependent decline in the glomerular filtration rate is associated with a reduced production of bioactive calcitriol. As this phenomenon is not detectable by the assessment of 25(OH)D, it is necessary to analyze the level of parathyroid hormone as a marker of calcitriol function...
April 17, 2018: Zeitschrift Für Gerontologie und Geriatrie
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
#13
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/29665087/25-hydroxyvitamin-d-threshold-for-the-effects-of-vitamin-d-supplements-on-bone-density-secondary-analysis-of-a-randomized-controlled-trial
#14
Helen M Macdonald, Ian R Reid, Gregory D Gamble, William D Fraser, Jonathan C Tang, Adrian D Wood
Most trials of vitamin D supplementation have shown no benefits on bone density (BMD), though severe vitamin D deficiency causes osteomalacia which is associated with profound BMD deficits. Recently, the ViDA-BMD study from New Zealand demonstrated a threshold of baseline 25-hydroxyvitamin D (30 nmol/L) below which vitamin D supplementation did benefit BMD. We have now re-examined data from a similar trial in Aberdeen to determine whether a baseline 25-hydroxyvitamin D threshold of 30 nmol/L is also observed in that database...
April 17, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29664315/potential-correlation-between-circulating-fetuin-a-and-pentraxin-3-with-biochemical-parameters-of-calcification-in-hemodialysis-patients
#15
Javad Hashemi, Hamid-Reza Joshaghani, Arash Akaberi, Zahra Hesari, Reza Ghanbari, Mohsen Mohammadzadeh, Ali-Reza Golshan
BACKGROUND: The strong correlation between vascular calcification and cardiovascular risk, which is a major cause of mortality in hemodialysis (HD) patients, has been well established. Fetuin-A is an inhibitor of vascular calcification, and pentraxin 3 (PTX3) is produced at the site of inflammation, which is associated with cardiovascular disease (CVD). The main purpose of this study was evaluating the correlation between fetuin-A and PTX3 with some biochemical parameters effective upon vascular calcification in HD patients...
December 1, 2017: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/29662200/targeting-sphingosine-1-phosphate-lyase-as-an-anabolic-therapy-for-bone-loss
#16
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/29662050/does-vitamin-d-affect-chronic-renal-allograft-function-in-pediatric-transplant-patients
#17
Brooke Wile, Elisa Yoo, Ana Catalina Alvarez Elias, Lakshmimathy Subramanian, Kathryn Eager, Ajay Parkesh Sharma, Guido Filler
BACKGROUND Correction of hypovitaminosis D is simple, but it is unclear whether it is associated with an accelerated decline of renal allograft function in pediatric renal transplantation patients. This retrospective single center cohort study aimed at analyzing the effect of vitamin D and covariates on the slope of 1/creatinine after the first year. MATERIAL AND METHODS After ethics committee approval, 37 (14 male) pediatric renal transplant recipients on mycophenolate mofetil, who were followed between 2006 and 2014, were included in this study...
April 17, 2018: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/29660161/the-fgf-23-klotho-axis-and-its-relationship-with-phosphorus-calcium-vitamin-d-pth-aldosterone-severity-of-disease-and-outcome-in-hospitalised-foals
#18
A M Kamr, K A Dembek, B E Hildreth, P R Morresey, R A Rathgeber, T A Burns, A A Zaghawa, R E Toribio
BACKGROUND: Fibroblast growth factor-23 (FGF-23) and klotho are key regulators of vitamin D and parathyroid hormone (PTH) synthesis as well as phosphorus and calcium homeostasis; however, information on the FGF-23/klotho axis in healthy and hospitalised foals is lacking. OBJECTIVES: The aims of this study were to measure serum FGF-23 and klotho concentrations and determine their association with serum phosphorus, total calcium (TCa), vitamin D metabolite [25(OH)D, 1,25(OH)2 D], PTH, and aldosterone concentrations, disease severity, and mortality in hospitalised foals...
April 16, 2018: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29659895/identification-of-differential-transcriptional-patterns-in-primary-and-secondary-hyperparathyroidism
#19
Samira M Sadowski, Marc Pusztaszeri, Marie-Claude Brulhart-Meynet, Volodymyr Petrenko, Claudio De Vito, Jonathan Sobel, Céline Delucinge-Vivier, Electron Kebebew, Romano Regazzi, Jacques Philippe, Frédéric Triponez, Charna Dibner
Context: Hyperparathyroidism is associated with hypercalcemia and the excess of parathyroid hormone secretion. However, the alterations in molecular pattern of functional genes during parathyroid tumorigenesis have not been unraveled. We aimed at establishing transcriptional patterns of normal and pathological parathyroid glands (PG) in sporadic primary and secondary hyperparathyroidism (HPT1, 2). Objective: To evaluate dynamic alterations in molecular patterns as a function of the type of PG pathology, a comparative transcript analysis was conducted in subgroups of healthy samples, sporadic HPT1 adenoma and hyperplasia, and HPT2...
April 5, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29658832/the-associations-between-hypovitaminosis-d-higher-pth-levels-with-bone-mineral-densities-and-risk-of-the-10-year-probability-of-major-osteoporotic-fractures-in-chinese-patients-with-t2dm
#20
Xiao-Feng Wang, Jing-Jia Yu, Xiao-Jing Wang, Yi-Xuan Jing, Li-Hao Sun, Bei Tao, Wei-Qing Wang, Guang Ning, Jian-Min Liu, Hong-Yan Zhao
OBJECTIVE: In the current study, we investigated the vitamin D status, and its relationships with parathyroid hormone (PTH) levels, bone mineral density (BMD), and the 10-year probability of fractures in Chinese patients with type 2 diabetes mellitus (T2DM). METHODS: This was a cross-sectional study of 785 patients. BMDs at the lumbar spine (L2-4), femoral neck (FN), and total hip (TH) were measured by dual-energy X-ray absorptiometry (DXA). Serum levels of 25-hydroxyvitamin D (25(OH)D) and intact PTH were also quantified...
April 2018: Endocrine Practice
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