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parathyroid-like hormone

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https://www.readbyqxmd.com/read/29137892/role-of-pyrophosphate-in-vascular-calcification-in-chronic-kidney-disease
#1
Daniel Azpiazu, Sergio Gonzalo, Emilio González-Parra, Jesús Egido, Ricardo Villa-Bellosta
Vascular calcification is a pathology characterized by the deposition of calcium-phosphate in cardiovascular structures, mainly in the form of hydroxyapatite crystals, resulting in ectopic calcification. It is correlated with increased risk of cardiovascular disease and myocardial infarction in diabetic patients and in those with chronic kidney disease (CKD). Vascular smooth muscle cells are sensitive to changes in inorganic phosphate (Pi) levels. They are able to adapt and modify some of their functions and promote changes which trigger calcification...
November 11, 2017: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/29134314/surgery-for-primary-hyperparathyroidism-with-normal-non-suppressed-parathyroid-hormone-can-be-both-challenging-and-successful
#2
Lauren E Orr, Travis J McKenzie, Geoffrey B Thompson, David R Farley, Robert A Wermers, Melanie L Lyden
BACKGROUND: Criteria for diagnosing primary hyperparathyroidism (PHPT) include hypercalcemia in the presence of parathyroid hormone (PTH) levels that are either elevated (classic PHPT) or normal but non-suppressed. However, there is no standard definition of what constitutes normal non-suppressed levels, and data are lacking regarding the potential for surgical cure in these patients. METHODS: A retrospective review of patients undergoing parathyroidectomy for sporadic PHPT between 2012 and 2014 was performed...
November 13, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/29131865/associations-between-ret-tagsnps-and-their-haplotypes-and-susceptibility-clinical-severity-and-thyroid-function-in-patients-with-differentiated-thyroid-cancer
#3
Caiyun He, Jiangjun Ma, Yongle Jiang, Xuan Su, Xiao Zhang, Weichao Chen, Zulu Ye, Tiancheng Deng, Wenze Deng, Ankui Yang
BACKGROUND: It is unclear whether common genetic variants of the RET proto-oncogene contribute to disease susceptibility, clinical severity, and thyroid function in differentiated thyroid cancer (DTC). METHODS: A total of 300 DTC patients and 252 healthy controls were enrolled in this study. Seven RET tagging single nucleotide polymorphisms were genotyped using the KASPar platform. RESULTS: Subgroup analysis showed that concomitant thyroid benign diseases were less likely to occur in DTC subjects with the rs1799939 AG or AG plus AA genotypes (odds ratio (OR) = 1...
2017: PloS One
https://www.readbyqxmd.com/read/29113980/management-of-endocrine-disease-novel-anabolic-treatments-for-osteoporosis
#4
Ernesto Canalis
Skeletal anabolic agents enhance bone formation, which is determined by the number and function of osteoblasts. Signals that influence the differentiation and function of cells of the osteoblast lineage play a role in the mechanism of action of anabolic agents in the skeleton. Wnts induce the differentiation of mesenchymal stem cells toward osteoblasts, and insulin-like growth factor I (IGF-I) enhances the function of mature osteoblasts. The activity of Wnt and IGF-I is controlled by proteins that bind to the growth factor or to its receptors...
November 7, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/29099947/recombinant-human-parathyroid-hormone-effect-on-health-related-quality-of-life-in-adults-with-chronic-hypoparathyroidism
#5
Tamara J Vokes, Michael Mannstadt, Michael A Levine, Bart L Clarke, Peter Lakatos, Kristina Chen, Rebecca Piccolo, Alan Krasner, Dolores M Shoback, John P Bilezikian
Context: Reduced health-related quality of life (HRQoL) is common in patients with hypoparathyroidism on conventional therapy with calcium and active vitamin D supplements. Objective: To examine the effects of recombinant human parathyroid hormone (rhPTH[1-84]) on HRQoL as measured by the 36-Item Short Form Health Survey (SF-36) during the multinational, randomized, placebo-controlled REPLACE study. Patients: 122 adults with chronic hypoparathyroidism...
November 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29098662/deregulation-of-the-growth-hormone-insulin-like-growth-factor-1-axis-in-adults-with-cystic-fibrosis
#6
C Pascucci, R V De Biase, D Savi, S Quattrucci, A M Isidori, C Lubrano, L Gnessi, A Lenzi
PURPOSE: Patients with cystic fibrosis (CF) present with signs and symptoms that overlap with those of adult growth hormone deficiency (GHD) syndrome: loss of muscle mass, bone fragility and lower stress tolerance. In literature, the prevalence of GHD in pediatric CF patients is higher than general population, but these studies have been performed on children with growth delay. To our knowledge, there are no studies on adult patients. The aim of this paper is to evaluate GH-IGF1 axis in an adult CF population...
November 2, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29078380/large-g-protein-%C3%AE-subunit-xl%C3%AE-s-limits-clathrin-mediated-endocytosis-and-regulates-tissue-iron-levels-in-vivo
#7
Qing He, Richard Bouley, Zun Liu, Marc N Wein, Yan Zhu, Jordan M Spatz, Chia-Yu Wang, Paola Divieti Pajevic, Antonius Plagge, Jodie L Babitt, Murat Bastepe
Alterations in the activity/levels of the extralarge G protein α-subunit (XLαs) are implicated in various human disorders, such as perinatal growth retardation. Encoded by GNAS, XLαs is partly identical to the α-subunit of the stimulatory G protein (Gsα), but the cellular actions of XLαs remain poorly defined. Following an initial proteomic screen, we identified sorting nexin-9 (SNX9) and dynamins, key components of clathrin-mediated endocytosis, as binding partners of XLαs. Overexpression of XLαs in HEK293 cells inhibited internalization of transferrin, a process that depends on clathrin-mediated endocytosis, while its ablation by CRISPR/Cas9 in an osteocyte-like cell line (Ocy454) enhanced it...
November 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29038066/in-vitro-and-preclinical-assessment-of-an-intranasal-spray-formulation-of-parathyroid-hormone-pth-1-34-for-the-treatment-of-osteoporosis
#8
Allan J Williams, Faron Jordan, Gareth King, Andrew L Lewis, Lisbeth Illum, Tahir Masud, Alan C Perkins, Richard G Pearson
Osteoporosis treatment with PTH 1-34 injections significantly reduces the incidence of bone fracture. Potential further reductions in fracture rate should be observed through nasal spray delivery to address the poor compliance associated with patient dislike of repeated PTH 1-34 subcutaneous injections. In vitro human osteoblast-like Saos-2 cell intracellular cAMP levels were used to define PTH 1-34 nasal spray formulation bioactivity. The chemically synthesised PTH 1-34 had an EC50 of 0.76nM. Absorption enhancers polyethylene glycol (15)-hydroxystearate (Solutol(®) HS15), poloxamer 407, chitosan or sodium hyaluronate did not diminish the bioactivity of PTH 1-34 within an in vitro cell culture model (p >0...
October 14, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28953664/risk-factors-of-hypoparathyroidism-following-total-thyroidectomy-with-central-lymph-node-dissection
#9
Anping Su, Bin Wang, Yanping Gong, Rixiang Gong, Zhihui Li, Jingqiang Zhu
The risk factors of hypoparathyroidism after total thyroidectomy (TT) with central lymph node dissection (CND) have not been completely defined. The aim of the study was to evaluate the risk factors of hypoparathyroidism after the surgery.We retrospectively reviewed our patients who underwent TT and CND (including lateral lymph node dissection) for thyroid carcinoma between January 2013 and June 2016. According to the postoperative serum levels of parathyroid hormone within 6 months, the patients were divided into normal, transient hypoparathyroidism, and permanent hypoparathyroidism groups...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28948826/hormonal-and-bone-parameters-in-pubertal-girls
#10
V Cirmanova, I Zofkova, P Kasalicky, V Lanska, M Bayer, L Starka, R Kanceva
Here we analyzed associations between muscles mass, total bone mineral content (BMC), lumbar spine bone density (BMD L1-L4) and serum or urine hormones in healthy peripubertal girls. Total BMC and areal BMD L1-L4, muscle mass and fat were measured by dual-energy X-ray absorptiometry (DXA). Muscle force (N) was estimated by a dynamometer. Circulating estradiol, follicle-stimulating hormone (FSH), luteinizing hormone (LH), 25-hydroxy vitamin D, parathyroid hormone (PTH), insulin-like growth factor 1 (IGF-1), leptin, osteocalcin, bone isoenzyme of alkaline phosphatase (bALP) and total calcium and phosphorus were quantified as the nocturnal melatonin and serotonin urinary excretion...
September 26, 2017: Physiological Research
https://www.readbyqxmd.com/read/28902430/reduced-serum-igf-1-associated-with-hepatic-osteodystrophy-is-a-main-determinant-of-low-cortical-but-not-trabecular-bone-mass
#11
Zhongbo Liu, Tianzhen Han, Haim Werner, Clifford J Rosen, Mitchell B Schaffler, Shoshana Yakar
Hepatic osteodystrophy is multifactorial in its pathogenesis. Numerous studies have shown that impairments of the hepatic growth hormone/insulin-like growth factor-1 axis (GH/IGF-1) are common in patients with non-alcoholic fatty liver disease, chronic viral hepatitis, liver cirrhosis, and chronic cholestatic liver disease. Moreover these conditions are also associated with low bone mineral density (BMD) and greater fracture risk, particularly in cortical bone sites. Hence, we addressed whether disruptions in the GH/IGF-1 axis were causally related to the low bone mass in states of chronic liver disease using a mouse model of liver-specific GH-receptor (GHR) gene deletion (Li-GHRKO)...
September 13, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28901272/disorders-of-mechanisms-of-calcium-metabolism-control-as-potential-risk-factors-of-prostate-cancer
#12
Dorota Skrajnowska, Barbara Bobrowska-Korczak, Andrzej Tokarz
Prostate cancer significantly affects the overall morbidity and mortality of malignant tumours in highly developed countries. Important risk factors include family predisposition and regional, racial and dietary determinants. The scientific literature contains a great deal of data on the role of calcium and dairy products in general in the process of neoplastic transformation of the prostate. This is most likely linked to the fact that changes in the concentration of calcium ions control such varied life processes as secretion of hormones and neurotransmitters, the level of cyclic nucleotides, and cell growth, division and differentiation...
September 12, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28861377/concomitant-thyroid-disease-and-primary-hyperparathyroidism-in-patients-undergoing-parathyroidectomy-or-thyroidectomy
#13
Marie-Christine Wright, Kelly Jensen, Hossam Mohamed, Carolyn Drake, Khuzema Mohsin, Dominique Monlezun, Nuha Alsaleh, Emad Kandil
BACKGROUND: Thyroid abnormalities have been found intraoperatively during parathyroidectomy and have resulted in concomitant thyroidectomy. The identification of concomitant disease is important prior to primary operation in order to minimize reoperations. This study investigates the incidence of concomitant primary hyperparathyroidism (PHPT) and thyroid nodular disease in patients undergoing thyroidectomy or parathyroidectomy. METHODS: We performed a retrospective review of prospectively gathered data for 621 patients who underwent thyroidectomy, parathyroidectomy, or both at Tulane Medical Center...
August 2017: Gland Surgery
https://www.readbyqxmd.com/read/28834664/plasma-calcidiol-calcitriol-and-parathyroid-hormone-and-risk-of-new-onset-heart-failure-in-a-population-based-cohort-study
#14
Laura M G Meems, Frank P Brouwers, Michel M Joosten, Hiddo J Lambers Heerspink, Dick de Zeeuw, Stephan J L Bakker, Ron T Gansevoort, Wiek H van Gilst, Pim van der Harst, Rudolf A de Boer
BACKGROUND: Heart failure (HF) is a major problem in the Western world, with increasing prevalence and incidence. Because HF cannot be cured, prevention of HF is of utter importance. Calcidiol, calcitriol, and parathyroid hormone (PTH) have been identified as risk factors for cardiovascular disease. However, their association with new onset HF remains to be established. We investigated whether calcidiol, calcitriol, and PTH could be used to identify those subjects at risk for new onset HF, and if they had additive predictive value over established risk predictors like N-terminal-pro Brain-type natriuretic peptide and highly sensitive Troponin-T...
September 2016: ESC Heart Failure
https://www.readbyqxmd.com/read/28806048/electrolytes-calcium-disorders
#15
REVIEW
Craig Barstow
A normal serum calcium level is 8 to 10 mg/dL. The diagnosis of hypercalcemia (ie, levels 10.5 mg/dL or greater) should be confirmed with an albumin-adjusted or ionized calcium level. The two most common causes of hypercalcemia are hyperparathyroidism and malignancy. Drugs, notably lithium and thiazide diuretics, also can cause hypercalcemia. Patients with severe or symptomatic hypercalcemia should be treated initially with hydration to decrease calcium levels. The evaluation should include a parathyroid hormone (PTH) level...
August 2017: FP Essentials
https://www.readbyqxmd.com/read/28797019/associations-of-low-vitamin-d-and-elevated-parathyroid-hormone-concentrations-with-bone-mineral-density-in-perinatally-hiv-infected-children
#16
MULTICENTER STUDY
Denise L Jacobson, Charles B Stephensen, Tracie L Miller, Kunjal Patel, Janet S Chen, Russell B Van Dyke, Ayesha Mirza, Gertrud U Schuster, Rohan Hazra, Angela Ellis, Sean S Brummel, Mitchell E Geffner, Margarita Silio, Stephen A Spector, Linda A DiMeglio
BACKGROUND: Perinatally HIV-infected (PHIV) children have, on average, lower bone mineral density (BMD) than perinatally HIV-exposed uninfected (PHEU) and healthy children. Low 25-hydroxy vitamin D [25(OH)D] and elevated parathyroid hormone (PTH) concentrations may lead to suboptimal bone accrual. METHODS: PHIV and PHEU children in the Pediatric HIV/AIDS Cohort Study had total body (TB) and lumbar spine (LS) BMD and bone mineral content (BMC) measured by dual-energy x-ray absorptiometry; BMD z-scores (BMDz) were calculated for age and sex...
September 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28762101/clinical-outcomes-and-survival-in-pediatric-patients-initiating-chronic-dialysis-a-report-of-the-naprtcs-registry
#17
Donald J Weaver, Michael J G Somers, Karen Martz, Mark M Mitsnefes
BACKGROUND: The 2011 annual report of the North American Pediatric Renal Transplant Cooperative Study (NAPRTCS) registry comprises data on 6482 dialysis patients over the past 20 years of the registry. METHODS: The study compared clinical parameters and patient survival in the first 10 years of the registry (1992-2001) with the last decade of the registry (2002-2011). RESULTS: There was a significant increase in hemodialysis as the initiating dialysis modality in the most recent cohort (42% vs...
December 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28748891/study-of-chronic-kidney-disease-mineral-bone-disorders-in-newly-detected-advanced-renal-failure-patients-a-hospital-based-cross-sectional-study
#18
Praveen Kumar Etta, R K Sharma, Amit Gupta
We aim to evaluate the disturbances in mineral metabolism, abnormalities in bone mineral density (BMD), and extraskeletal calcification in newly detected, untreated predialysis stage 4 and 5 chronic kidney disease (CKD) patients at a tertiary care hospital in North India. This is cross-sectional observational study. A total of 95 (68 males, 27 females) newly detected patients underwent clinical evaluation, biochemical assessment [serum calcium, phosphorus, alkaline phosphatase (ALP), albumin, creatinine, intact parathyroid hormone (iPTH), 25- hydroxyvitamin D (25(OH)D)], BMD measurement (at spine, hip, and forearm) by dual-energy X-ray absorptiometry (DXA), lateral abdominal radiograph [for abdominal aortic calcification (AAC)], skeletal survey (to look for any abnormality including fractures), and echocardiography [for any cardiac valvular calcification (CVC)]...
July 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28741586/a-new-mutation-in-the-calcium-sensing-receptor-gene-causing-hypocalcaemia-case-report-of-a-father-and-two-sons
#19
M K Schoutteten, B Bravenboer, S Seneca, K Stouffs, B Velkeniers
BACKGROUND: Regulation of calcium is mediated by parathyroid hormone (PTH) and 1.25-dihydroxyvitamine D3. The calcium-sensing receptor (CaSR) regulates PTH release by a negative feedback system. Gain-of-function mutations in the CaSR gene reset the calcium-PTH axis, leading to hypocalcaemia. PATIENTS AND METHODS: We analysed a family with hypocalcaemia. The proband was a 47-year-old man (index, patient I1), who presented with paraesthesias in both limbs. He has two sons (patient II1 a nd I I2)...
July 2017: Netherlands Journal of Medicine
https://www.readbyqxmd.com/read/28735384/influence-of-feeding-inorganic-vanadium-on-growth-performance-endocrine-variables-and-biomarkers-of-bone-health-in-crossbred-calves
#20
Ravi Prakash Pal, Veena Mani, Deepika Tripathi, Rajesh Kumar, Neelam J Kewalramani
The nutritional essentialities of transition element vanadium (V) as micro-nutrient in farm animals have not yet been established, though in rat model, vanadium as vanadate has been reported to exert insulin-mimetic effect and shown to be needed for proper development of bones. The objective of this study was to determine the effect of V supplementation on growth performance, plasma hormones and bone health status in calves. Twenty-four crossbred calves (body weight 72.83 ± 2.5 kg; age 3-9 months) were blocked in four groups and randomly assigned to four treatment groups (n = 6) on body weight and age basis...
July 22, 2017: Biological Trace Element Research
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