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parathyroid-like hormone

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https://www.readbyqxmd.com/read/28178186/exogenous-pthrp-repairs-the-damaged-fracture-healing-of-pthrp-mice-and-accelerates-fracture-healing-of-wild-mice
#1
Yinhe Wang, Xin Fang, Chun Wang, Congzhu Ding, Hua Lin, Anlong Liu, Lei Wang, Yang Cao
Bone fracture healing is a complicated physiological regenerative process initiated in response to injury and is similar to bone development. To demonstrate whether an exogenous supply of parathyroid hormone-related protein (PTHrP) helps in bone fracture healing, closed mid-diaphyseal femur fractures were created and stabilized with intramedullary pins in eight-week-old wild-type (WT) PTHrP+/+ and PTHrP+/- mice. After administering PTHrP for two weeks, callus tissue properties were analyzed at one, two, and four weeks post-fracture (PF) by various methods...
February 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28120940/parathyroid-hormone-like-hormone-is-a-poor-prognosis-marker-of-head-and-neck-cancer-and-promotes-cell-growth-via-runx2-regulation
#2
Wei-Min Chang, Yuan-Feng Lin, Chia-Yi Su, Hsuan-Yu Peng, Yu-Chan Chang, Jenn-Ren Hsiao, Chi-Long Chen, Jang-Yang Chang, Yi-Shing Shieh, Michael Hsiao, Shine-Gwo Shiah
Parathyroid Hormone-Like Hormone (PTHLH) is an autocrine/paracrine ligand that is up-regulated in head and neck squamous cell carcinoma (HNSCC). However, the cellular function and regulatory mechanism in HNSCC remains obscure. We investigated the clinical significance of PTHLH in HNSCC patients, and verified the role of RUNX2/PTHLH axis, which is stimulated HNSCC cell growth. In patients, PTHLH is a poor prognosis marker. PTHLH expression lead to increasing the cell proliferation potential through an autocrine/paracrine role and elevating blood calcium level in Nod-SCID mice...
January 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28097355/effect-of-etelcalcetide-vs-placebo-on-serum-parathyroid-hormone-in-patients-receiving-hemodialysis-with-secondary-hyperparathyroidism-two-randomized-clinical-trials
#3
RANDOMIZED CONTROLLED TRIAL
Geoffrey A Block, David A Bushinsky, John Cunningham, Tilman B Drueke, Markus Ketteler, Reshma Kewalramani, Kevin J Martin, T Christian Mix, Sharon M Moe, Uptal D Patel, Justin Silver, David M Spiegel, Lulu Sterling, Liron Walsh, Glenn M Chertow
Importance: Secondary hyperparathyroidism contributes to extraskeletal complications in chronic kidney disease. Objective: To evaluate the effect of the intravenous calcimimetic etelcalcetide on serum parathyroid hormone (PTH) concentrations in patients receiving hemodialysis. Design, Setting, and Participants: Two parallel, phase 3, randomized, placebo-controlled treatment trials were conducted in 1023 patients receiving hemodialysis with moderate to severe secondary hyperparathyroidism...
10, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28093352/cyp24a1-loss-of-function-clinical-phenotype-of-monoallelic-and-biallelic-mutations
#4
REVIEW
Thomas O Carpenter
CYP24A1, encoding the vitamin D-24-hydroxylase, is of major clinical and physiologic importance, serving to regulate the catabolism of 1,25-(OH)2D, the physiologically active vitamin D metabolite. In addition to facilitating catabolism of 1,25-(OH)2D, CYP24A1 also enhances the turnover and elimination of 25-OHD, the abundant precursor metabolite and storage form of the vitamin. CYP24A1 can be stimulated hormonally by 1,25-(OH)2D and by FGF23, whereas CYP27B1, encoding the vitamin D-1α-hydroxylase, is stimulated hormonally by parathyroid hormone (PTH) and downregulated by FGF23...
January 13, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28060010/predictors-of-longitudinal-change-in-bone-mineral-density-in-a-cohort-of-hiv-positive-and-negative-subjects
#5
Willard Tinago, Aoife G Cotter, Caroline Sabin, Alan Macken, Eoin Kavanagh, Jennifer Brady, Geraldine McCarthy, Juliet Compston, Patrick W G Mallon
OBJECTIVE: Although low bone mineral density (BMD) is prevalent in HIV, changes in BMD over time remain unclear. We aimed to compare rates of, and factors associated with, BMD change between HIV-positive and HIV-negative subjects. METHODS: In a prospective, 3-year cohort, HIV-positive and HIV-negative subjects provided annual demographic and clinical data, fasting bloods and dual x-ray absorptiometry (DXA). Using longitudinal mixed models we compared and determined predictors of rate of change in BMD...
January 4, 2017: AIDS
https://www.readbyqxmd.com/read/28057872/a-phase-3-multicentre-randomized-double-blind-placebo-controlled-parallel-group-study-to-evaluate-the-efficacy-and-safety-of-etelcalcetide-ono-5163-amg-416-a-novel-intravenous-calcimimetic-for-secondary-hyperparathyroidism-in-japanese-haemodialysis-patients
#6
Masafumi Fukagawa, Keitaro Yokoyama, Takashi Shigematsu, Takashi Akiba, Akifumi Fujii, Takuto Kuramoto, Motoi Odani, Tadao Akizawa
BACKGROUND: Secondary hyperparathyroidism (SHPT) is a major complication associated with chronic kidney disease. We evaluated the efficacy and safety of etelcalcetide (ONO-5163/AMG 416), a novel intravenous calcimimetic, in Japanese haemodialysis patients with SHPT. METHODS: In this phase 3, multicentre, randomized, double-blind, placebo-controlled, parallel-group study, etelcalcetide was administered three times per week at an initial dose of 5 mg, and subsequently adjusted to doses between 2...
January 5, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28032553/using-parathyroid-hormone-spikes-during-parathyroidectomy-to-guide-intraoperative-decision-making
#7
Azadeh A Carr, Tina W Yen, Stuart D Wilson, Douglas B Evans, Tracy S Wang
BACKGROUND: Intraoperative parathyroid hormone (IOPTH) level monitoring is a useful adjunct to parathyroidectomy for primary hyperparathyroidism (pHPT). Occasionally, increases ("spikes") in IOPTH levels from the preoperative baseline parathyroid hormone may occur, which may lead to longer operative times or more extensive neck exploration or both. The aim of this study was to determine if the extent of IOPTH level increase predicts single gland disease (SGD). METHODS: This is a retrospective review of a prospective parathyroid database of patients undergoing parathyroidectomy for sporadic pHPT from 1999-2013...
October 14, 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/28030966/systemic-drugs-that-influence-titanium-implant-osseointegration
#8
Dragos Apostu, Ondine Lucaciu, Gheorghe Dan Osvald Lucaciu, Bogdan Crisan, Liana Crisan, Mihaela Baciut, Florin Onisor, Grigore Baciut, Radu Septimiu Câmpian, Simion Bran
Titanium implants are widely used on an increasing number of patients in orthopedic and dental medicine. Despite the good survival rates of these implants, failures that lead to important socio-economic consequences still exist. Recently, research aimed at improving implant fixation, a process called osseointegration, has focused on a new, innovative field: systemic delivery of drugs. Following implant fixation, patients receive systemic drugs that could either impair or enhance osseointegration; these drugs include anabolic and anti-catabolic bone-acting agents in addition to new treatments...
January 23, 2017: Drug Metabolism Reviews
https://www.readbyqxmd.com/read/28018585/parathyroid-hormone-reflects-adiposity-and-cardiometabolic-indices-but-not-bone-density-in-normal-men
#9
Emma O Billington, Greg D Gamble, Ian R Reid
Hyperparathyroidism may be associated with skeletal and cardiovascular abnormalities, but it is unclear whether these associations exist for high-normal levels of parathyroid hormone (PTH). We assessed relationships between PTH and anthropometric, skeletal and cardiometabolic indices in normal men. Body composition, blood pressure, biochemistry and bone mineral density (BMD) were evaluated in 151 healthy men. BMD was reassessed at 2 years, and coronary artery calcium (CAC) was measured at 3.5 years. Relationships between PTH and other baseline characteristics, CAC scores and change in BMD were evaluated...
2016: BoneKEy Reports
https://www.readbyqxmd.com/read/28001017/improvement-of-bone-turnover-markers-and-bone-mineral-density-following-treatment-of-primary-aldosteronism
#10
Huai H Loh, Nor A Kamaruddin, Rozman Zakaria, Norlela Sukor
BACKGROUND: Recent studies showed association between hyperaldosteronism and low bone density among patients with primary aldosteronism (PA) due to secondary hyperparathyroidism. Our objective is to assess bone turnover markers (BTM) and bone mineral density (BMD) of PA patients compared to essential hypertension. METHODS: This was an open-label, prospective, case-controlled study, conducted over 12 months. Fifty-two consecutive patients referred for secondary hypertension were screened...
December 20, 2016: Minerva Endocrinologica
https://www.readbyqxmd.com/read/27965160/hormonal-and-systemic-regulation-of-sclerostin
#11
Matthew T Drake, Sundeep Khosla
The Wnt/β-catenin signaling pathway plays an essential role in osteoblast biology. Sclerostin is a soluble antagonist of Wnt/β-catenin signaling secreted primarily by osteocytes. Current evidence indicates that sclerostin likely functions as a local/paracrine regulator of bone metabolism rather than as an endocrine hormone. Nonetheless, circulating sclerostin levels in humans often reflect changes in the bone microenvironment, although there may be exceptions to this observation. Using existing assays, circulating sclerostin levels have been shown to be altered in response to both hormonal stimuli and across a variety of normal physiological and pathophysiological conditions...
December 10, 2016: Bone
https://www.readbyqxmd.com/read/27934558/fibroblast-growth-factor-23-in-postrenal-transplant-an-often-forgotten-hormone
#12
Fateme Shamekhi Amiri, Mohammad Reza Khatami
Fibroblast growth factor 23 is likely to be the most important regulator of phosphate homeostasis, which mediates its functions through fibroblast growth factor receptors and the coreceptor Klotho. In addition to reducing expression of the sodium-phosphate cotransporters NPT2a and NPT2c in the proximal tubules, fibroblast growth factor 23 inhibits renal 1α-hydroxylase and stimulates 24-hydroxylase and appears to reduce parathyroid hormone secretion in short-term studies. Fibroblast growth factor 23 synthesis and secretion by osteocytes and osteoblasts are upregulated through 1,25-dihydroxyvitamin D3 and through an increased dietary phosphate intake...
December 2016: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27930311/spop-promotes-skeletal-development-and-homeostasis-by-positively-regulating-ihh-signaling
#13
Hongchen Cai, Aimin Liu
Indian Hedgehog (Ihh) regulates chondrocyte and osteoblast differentiation through the Glioma-associated oncogene homolog (Gli) transcription factors. Previous in vitro studies suggested that Speckle-type POZ protein (Spop), part of the Cullin-3 (Cul3) ubiquitin ligase complex, targets Gli2 and Gli3 for degradation and negatively regulates Hedgehog (Hh) signaling. In this study, we found defects in chondrocyte and osteoblast differentiation in Spop-null mutant mice. Strikingly, both the full-length and repressor forms of Gli3, but not Gli2, were up-regulated in Spop mutants, and Ihh target genes Patched 1 (Ptch1) and parathyroid hormone-like peptide (Pthlh) were down-regulated, indicating compromised Hh signaling...
December 20, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27894216/bone-effects-of-canagliflozin-a-sodium-glucose-co-transporter-2-inhibitor-in-patients-with-type-2-diabetes-mellitus
#14
REVIEW
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...
January 2017: Postgraduate Medicine
https://www.readbyqxmd.com/read/27893850/a-convenient-in-vivo-model-using-small-interfering-rna-silencing-to-rapidly-assess-skeletal-gene-function
#15
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
#16
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)...
January 2017: Surgery
https://www.readbyqxmd.com/read/27863779/how-long-should-we-follow-patients-after-apparently-curative-parathyroidectomy
#17
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...
January 2017: Surgery
https://www.readbyqxmd.com/read/27857805/neuropsychiatric-phenotype-in-a-child-with-pseudohypoparathyroidism
#18
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
#19
Susana Wu, Stephanie S 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...
January 2017: Surgery
https://www.readbyqxmd.com/read/27829503/risk-stratification-for-outpatient-parathyroidectomy-and-predictors-of-postoperative-complications
#20
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...
January 2017: American Journal of Otolaryngology
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