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parathyroid-like hormone

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https://www.readbyqxmd.com/read/27894216/bone-effects-of-canagliflozin-a-sodium-glucose-co-transporter-2-inhibitor-in-patients-with-type-2-diabetes-mellitus
#1
Thomas C Blevins, Azeez Farooki
Canagliflozin, a sodium glucose co-transporter 2 (SGLT2) inhibitor approved for the treatment of type 2 diabetes mellitus (T2DM), lowers blood glucose by inhibiting renal glucose reabsorption and increasing urinary glucose excretion. It has been reported that SGLT2 inhibitors may have potential adverse effects on bone, including increased fracture risk and decreased bone mineral density (BMD). Across clinical studies, canagliflozin was not associated with meaningful changes in serum or urine calcium, vitamin D, or parathyroid hormone...
November 28, 2016: Postgraduate Medicine
https://www.readbyqxmd.com/read/27893850/a-convenient-in-vivo-model-using-small-interfering-rna-silencing-to-rapidly-assess-skeletal-gene-function
#2
Wen Zhang, Can Liu, Bao Hai, Guohong Du, Hong Wang, Huijie Leng, Yingsheng Xu, Chunli Song
It is difficult to study bone in vitro because it contains various cell types that engage in cross-talk. Bone biologically links various organs, and it has thus become increasingly evident that skeletal physiology must be studied in an integrative manner in an intact animal. We developed a model using local intraosseous small interfering RNA (siRNA) injection to rapidly assess the effects of a target gene on the local skeletal environment. In this model, 160-g male Sprague-Dawley rats were treated for 1-2 weeks...
2016: PloS One
https://www.readbyqxmd.com/read/27866715/normohormonal-primary-hyperparathyroidism-is-a-distinct%C3%A2-form-of-primary-hyperparathyroidism
#3
Megan K Applewhite, Michael G White, Jennifer Tseng, Maryam K Mohammed, Frederic Mercier, Edwin L Kaplan, Peter Angelos, Tamara Vokes, Raymon H Grogan
BACKGROUND: Normohormonal primary hyperparathyroidism presents diagnostic and intraoperative challenges, and current literature is conflicting about management. We aim to better define normohormonal primary hyperparathyroidism in order to improve the care for these patients. METHODS: In the study, 516 consecutive patients undergoing parathyroidectomy for primary hyperparathyroidism were divided into 2 groups: classic primary hyperparathyroidism (classic primary hyperparathyroidism, increased serum levels of calcium, and parathyroid hormone) and normohormonal primary hyperparathyroidism (hypercalcemia, normal serum levels of parathyroid hormone)...
November 17, 2016: Surgery
https://www.readbyqxmd.com/read/27863779/how-long-should-we-follow-patients-after-apparently-curative-parathyroidectomy
#4
Irene Lou, Courtney Balentine, Samuel Clarkson, David F Schneider, Rebecca S Sippel, Herbert Chen
BACKGROUND: Little is known about the long-term recurrence risk for primary hyperparathyroidism after immediately "curative" parathyroidectomy. This study aimed to evaluate the risk of recurrent hyperparathyroidism in the 10 years after operation. METHOD: We retrospectively identified patients with sporadic primary hyperparathyroidism undergoing initial parathyroidectomy between November 1, 2000 and June 30, 2005. Recurrence was defined as serum calcium >10...
November 15, 2016: Surgery
https://www.readbyqxmd.com/read/27857805/neuropsychiatric-phenotype-in-a-child-with-pseudohypoparathyroidism
#5
Paola Visconti, Annio Posar, Maria Cristina Scaduto, Angelo Russo, Federica Tamburrino, Laura Mazzanti
Pseudohypoparathyroidism (PHP) is a rare heterogeneous genetic disease characterized by end-organ resistance to parathyroid hormone. In adulthood, heterogeneous neurological and psychiatric disorders have been reported which are associated with hypoparathyroidism in general and with PHP in particular, while for childhood, data are scanty. We report a case of a boy with PHP type 1b, in whom neurological signs at the onset prevailed, characterized by tic-like dyskinesias associated with a series of heterogeneous not well-defined neurological and behavioral features, describing the diagnostic work-up performed and the follow-up...
July 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/27842909/influence-of-a-negative-sestamibi-scan-on-the-decision-for-parathyroid-operation-by-the-endocrinologist-and-surgeon
#6
Susana Wu, Stephanie H Hwang, Philip I Haigh
BACKGROUND: It has been observed that negative sestamibi scans may impact practice patterns in patients with primary hyperparathyroidism. However, there are no published data on the issue. The objective was to elucidate the influence of negative sestamibi scans on referrals by endocrinologists for parathyroidectomy and surgeon decision-making. METHODS: All patients with primary hyperparathyroidism were identified within a region-wide health care system over a 2-year period...
November 11, 2016: Surgery
https://www.readbyqxmd.com/read/27829503/risk-stratification-for-outpatient-parathyroidectomy-and-predictors-of-postoperative-complications
#7
Sarah M Kidwai, Arjun K Parasher, Yan W Ho, Marita S Teng, Eric M Genden
INTRODUCTION: The mainstay of treatment for primary hyperparathyroidism is surgery. Hypocalcemia after parathyroidectomy is common and poses a significant challenge, leading to increased patient morbidity and health care costs. While several groups have found predictor factors for hypocalcemia, none have created a risk stratification model. Here, we recognize important factors and optimal cut-off values that can allow risk stratification of patients. METHODS: A single-institution retrospective chart review of 339 patients that underwent parathyroidectomy from 2009 to 2012 was conducted...
September 28, 2016: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/27818783/plasma-calcidiol-calcitriol-and-parathyroid-hormone-and-risk-of-new-onset-heart-failure-in-a-population-based-cohort-study
#8
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/27787773/bone-metabolism-in-patients-with-anorexia-nervosa-and-amenorrhoea
#9
L Idolazzi, M El Ghoch, R Dalle Grave, P V Bazzani, S Calugi, S Fassio, C Caimmi, O Viapiana, F Bertoldo, V Braga, M Rossini, D Gatti
PURPOSE: Aim of this study is focusing on bone metabolism in AN patients with amenorrhoea and related estrogen deficiency effects. METHODS: AN patients were compared both with healthy females and with postmenopausal women (reference model for estrogen deficiency). The study sample included 81 females with AN. Laboratory tests [25-OH vitamin D, bone turnover markers, intact parathyroid hormone, sclerostin (SOST) and dickkopf-related protein (DKK1)] and dual energy X-ray absorptiometry (DXA) were taken into account...
October 27, 2016: Eating and Weight Disorders: EWD
https://www.readbyqxmd.com/read/27784318/dietary-phosphate-supplement-does-not-rescue-skeletal-phenotype-in-a-mouse-model-for-craniometaphyseal-dysplasia
#10
Yaling Liu, Eliane H Dutra, Ernst J Reichenberger, I-Ping Chen
BACKGROUND: Mutations in the human progressive ankylosis gene (ANKH; Mus musculus ortholog Ank) have been identified as cause for craniometaphyseal dysplasia (CMD), characterized by progressive thickening of craniofacial bones and flared metaphyses of long bones. We previously reported a knock-in (KI) mouse model (Ank (KI/KI)) for CMD and showed transiently lower serum phosphate (Pi) as well as significantly higher mRNA levels of fibroblast growth factor 23 (Fgf23) in Ank (KI/KI) mice...
October 26, 2016: Journal of Negative Results in Biomedicine
https://www.readbyqxmd.com/read/27772640/intensive-hemodialysis-mineral-and-bone-disorder-and-phosphate-binder-use
#11
Michael Copland, Paul Komenda, Eric D Weinhandl, Peter A McCullough, Jose A Morfin
Mineral and bone disorder is a common complication of end-stage renal disease. Notably, hyperphosphatemia likely promotes calcification of the myocardium, valves, and arteries. Hyperphosphatemia is associated with higher risk for cardiovascular mortality and morbidity along a gradient beginning at 5.0mg/dL. Among contemporary hemodialysis (HD) patients, mean serum phosphorus level is 5.2mg/dL, although 25% of patients have serum phosphorus levels of 5.5 to 6.9mg/dL; and 13%, >7.0mg/dL. Treatment of hyperphosphatemia is burdensome...
November 2016: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/27770433/interleukin-6-mediated-signaling-in-adrenal-medullary-chromaffin-cells
#12
Danielle E Jenkins, Dharshini Sreenivasan, Fiona Carman, Samal Babru, Lee E Eiden, Stephen J Bunn
The pro-inflammatory cytokines, tumor necrosis factor-α and interleukin-1β/α modulate catecholamine secretion, and long-term gene regulation, in chromaffin cells of the adrenal medulla. Since interleukin-6 (IL6) also plays a key integrative role during inflammation, we have examined its ability to affect both tyrosine hydroxylase activity and adrenomedullary gene transcription in cultured bovine chromaffin cells. IL6 caused acute tyrosine/threonine phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2), and serine/tyrosine phosphorylation of signal transducer and activator of transcription 3 (STAT3)...
October 22, 2016: Journal of Neurochemistry
https://www.readbyqxmd.com/read/27766553/glucocorticoid-induced-osteoporosis-pathophysiological-role-of-gh-igf-i-and-pth-vitamin-d-axes-treatment-options-and-guidelines
#13
Gherardo Mazziotti, Anna Maria Formenti, Robert A Adler, John P Bilezikian, Ashley Grossman, Emilia Sbardella, Salvatore Minisola, Andrea Giustina
Glucocorticoid-induced osteoporosis is the most frequent form of secondary osteoporosis caused by chronic exposure to glucocorticoid excess. Pathogenesis of glucocorticoid-induced osteoporosis is multifactorial including direct effects of glucocorticoids on bone cells and indirect effects of glucocorticoids on several neuroendocrine and metabolic pathways. Fragility fractures occur early in glucocorticoid-induced osteoporosis and anti-osteoporotic drugs along with calcium and vitamin D should be started soon after exposure to glucocorticoid excess...
October 20, 2016: Endocrine
https://www.readbyqxmd.com/read/27764168/effects-of-secondary-hyperparathyroidism-treatment-on-improvement-in-anemia-results-from-the-mbd-5d-study
#14
Motoko Tanaka, Kazuki Yoshida, Shingo Fukuma, Kazuko Ito, Kazutaka Matsushita, Masafumi Fukagawa, Shunichi Fukuhara, Tadao Akizawa
OBJECTIVES: Anemia is an important prognostic factor in hemodialysis patients. It has been reported that parathyroidectomy ameliorates anemia and reduces the requirement of postoperative erythropoiesis-stimulating agents. The objective of this study was to assess the effect of cinacalcet, which is considered as a pharmacological parathyroidectomy, on anemia in hemodialysis patients. METHODS: We used data from a prospective cohort of Japanese hemodialysis patients with secondary hyperparathyroidism; the criteria were: intact parathyroid hormone concentrations ≥ 180 pg/mL or use of an intravenous or oral vitamin D receptor activator...
2016: PloS One
https://www.readbyqxmd.com/read/27759007/siks-control-osteocyte-responses-to-parathyroid-hormone
#15
Marc N Wein, Yanke Liang, Olga Goransson, Thomas B Sundberg, Jinhua Wang, Elizabeth A Williams, Maureen J O'Meara, Nicolas Govea, Belinda Beqo, Shigeki Nishimori, Kenichi Nagano, Daniel J Brooks, Janaina S Martins, Braden Corbin, Anthony Anselmo, Ruslan Sadreyev, Joy Y Wu, Kei Sakamoto, Marc Foretz, Ramnik J Xavier, Roland Baron, Mary L Bouxsein, Thomas J Gardella, Paola Divieti-Pajevic, Nathanael S Gray, Henry M Kronenberg
Parathyroid hormone (PTH) activates receptors on osteocytes to orchestrate bone formation and resorption. Here we show that PTH inhibition of SOST (sclerostin), a WNT antagonist, requires HDAC4 and HDAC5, whereas PTH stimulation of RANKL, a stimulator of bone resorption, requires CRTC2. Salt inducible kinases (SIKs) control subcellular localization of HDAC4/5 and CRTC2. PTH regulates both HDAC4/5 and CRTC2 localization via phosphorylation and inhibition of SIK2. Like PTH, new small molecule SIK inhibitors cause decreased phosphorylation and increased nuclear translocation of HDAC4/5 and CRTC2...
October 19, 2016: Nature Communications
https://www.readbyqxmd.com/read/27752003/total-parathyroidectomy-in-patients-with-chronic-kidney-disease-avoiding-repeat-surgery
#16
Thomas Hanna, Jacob A Akoh
Renal hyperparathyroidism (RHPT) is a common complication of renal failure and it is associated with significant morbidity and mortality. The aim of this study was to determine the patient characteristics which might predict persistent or recurrent hyperparathyroidism after surgery and to assess the long-term effect of unsuccessful surgery. This is a retrospective study of all chronic kidney disease patients who required a total parathyroidectomy (TP) because of failed medical management from January 1999 to December 2014...
September 2016: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/27671701/derangement-of-calcium-metabolism-in-diabetes-mellitus-negative-outcome-from-the-synergy-between-impaired-bone-turnover-and-intestinal-calcium-absorption
#17
REVIEW
Kannikar Wongdee, Nateetip Krishnamra, Narattaphol Charoenphandhu
Both types 1 and 2 diabetes mellitus (T1DM and T2DM) are associated with profound deterioration of calcium and bone metabolism, partly from impaired intestinal calcium absorption, leading to a reduction in calcium uptake into the body. T1DM is associated with low bone mineral density (BMD) and osteoporosis, whereas the skeletal changes in T2DM are variable, ranging from normal to increased and to decreased BMD. However, both types of DM eventually compromise bone quality through production of advanced glycation end products and misalignment of collagen fibrils (so-called matrix failure), thereby culminating in a reduction of bone strength...
January 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27642534/the-effect-of-long-term-exercise-on-the-production-of-osteoclastogenic-and-antiosteoclastogenic-cytokines-by-peripheral-blood-mononuclear-cells-and-on-serum-markers-of-bone-metabolism
#18
J Kelly Smith, Rhesa Dykes, David S Chi
Although it is recognized that the mechanical stresses associated with physical activity augment bone mineral density and improve bone quality, our understanding of how exercise modulates bone homeostasis at the molecular level is lacking. In a before and after trial involving 43 healthy adults, we measured the effect of six months of supervised exercise training on the spontaneous and phytohemagglutinin-induced production of osteoclastogenic cytokines (interleukin-1α, tumor necrosis factor-α), antiosteoclastogenic cytokines (transforming growth factor-β1 and interleukins 4 and 10), pleiotropic cytokines with variable effects on osteoclastogenesis (interferon-γ, interleukin-6), and T cell growth and differentiation factors (interleukins 2 and 12) by peripheral blood mononuclear cells...
2016: Journal of Osteoporosis
https://www.readbyqxmd.com/read/27613721/primary-hyperparathyroidism-review-and-recommendations-on-evaluation-diagnosis-and-management-a-canadian-and-international-consensus
#19
A A Khan, D A Hanley, R Rizzoli, J Bollerslev, J E M Young, L Rejnmark, R Thakker, P D'Amour, T Paul, S Van Uum, M Zakaria Shrayyef, D Goltzman, S Kaiser, N E Cusano, R Bouillon, L Mosekilde, A W Kung, S D Rao, S K Bhadada, B L Clarke, J Liu, Q Duh, E Michael Lewiecki, F Bandeira, R Eastell, C Marcocci, S J Silverberg, R Udelsman, K Shawn Davison, J T Potts, M L Brandi, J P Bilezikian
The purpose of this review is to assess the most recent evidence in the management of primary hyperparathyroidism (PHPT) and provide updated recommendations for its evaluation, diagnosis and treatment. A Medline search of "Hyperparathyroidism. Primary" was conducted and the literature with the highest levels of evidence were reviewed and used to formulate recommendations. PHPT is a common endocrine disorder usually discovered by routine biochemical screening. PHPT is defined as hypercalcemia with increased or inappropriately normal plasma parathyroid hormone (PTH)...
September 9, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27612777/drug-releasing-nano-engineered-titanium-implants-therapeutic-efficacy-in-3d-cell-culture-model-controlled-release-and-stability
#20
Karan Gulati, Masakazu Kogawa, Matthew Prideaux, David M Findlay, Gerald J Atkins, Dusan Losic
There is an ongoing demand for new approaches for treating localized bone pathologies. Here we propose a new strategy for treatment of such conditions, via local delivery of hormones/drugs to the trauma site using drug releasing nano-engineered implants. The proposed implants were prepared in the form of small Ti wires/needles with a nano-engineered oxide layer composed of array of titania nanotubes (TNTs). TNTs implants were inserted into a 3D collagen gel matrix containing human osteoblast-like, and the results confirmed cell migration onto the implants and their attachment and spread...
December 1, 2016: Materials Science & Engineering. C, Materials for Biological Applications
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