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Parathyroid hormone related

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https://www.readbyqxmd.com/read/27908723/oxidation-inhibits-pth-receptor-signaling-and-trafficking
#1
Juan A Ardura, Verónica Alonso, Pedro Esbrit, Peter A Friedman
Reactive Oxygen Species (ROS) increase during aging, potentially affecting many tissues including brain, heart, and bone. ROS alter signaling pathways and constitute potential therapeutic targets to limit oxidative damaging effects in aging-associated diseases. Parathyroid hormone receptors (PTHR) are widely expressed and PTH is the only anabolic therapy for osteoporosis. The effects of oxidative stress on PTHR signaling and trafficking have not been elucidated. Here, we used Fluorescence Resonance Energy Transfer (FRET)-based cAMP, ERK, and calcium fluorescent biosensors to analyze the effects of ROS on PTHR signaling and trafficking by live-cell imaging...
November 28, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27905644/requests-of-laboratory-tests-for-the-diagnosis-and-management-of-calcium-phosphate-disorders-in-spain
#2
María Salinas, Maite López-Garrigós, Emilio Flores, Joaquín Uris, Carlos Leiva-Salinas
BACKGROUND: Knowledge about the variability in the request of calcium-phosphate metabolism laboratory tests in primary care is important to design strategies to improve health system efficiency. AIM: To compare the inter-practice variability in calcium-phosphate metabolism laboratory tests requested by general practitioners from diverse regions across Spain. MATERIAL AND METHODS: One hundred and forty one clinical laboratories were invited to participate in an observational cross-sectional study...
August 2016: Revista Médica de Chile
https://www.readbyqxmd.com/read/27904108/denosumab-is-effective-for-controlling-serum-calcium-levels-in-patients-with-humoral-hypercalcemia-of-malignancy-syndrome-a-case-report-on-parathyroid-hormone-related-protein-producing-cholangiocarcinoma
#3
Norihiro Ashihara, Koji Nakajima, Yoshiyuki Nakamura, Mutsuhiro Kobayashi, Kumiko Shirahata, Chika Maeda, Takeshi Uehara, Daisuke Gomi, Nobuo Ito
Hypercalcemia resulting in the elevation of serum parathyroid hormone-related protein (PTHrP) and suppression of serum PTH was observed in a patient with advanced cholangiocarcinoma (CCC) and multiple lymph node metastases. We confirmed humoral hypercalcemia of malignancy based on PTHrP-producing CCC. Chemotherapy with gemcitabine and cisplatin could not control the patient's serum PTHrP levels and the patient was affected with bisphosphonate-refractory hypercalcemia. We administered a single dose of denosumab, an anti-receptor activator of nuclear factor-kappaB ligand monoclonal antibody, and the patient's serum calcium levels remained close to the normal range for approximately 3 weeks without additional treatment...
2016: Internal Medicine
https://www.readbyqxmd.com/read/27903998/survival-benefit-of-hemodiafiltration-compared-with-prolonged-high-flux-hemodialysis
#4
Petar S Djuric, Aleksandar Jankovic, Jovan Popovic, Jelena Tosic Dragovic, Ana Bulatovic, Zivka Djuric, Milos Mitrovic, Nada Dimkovic
INTRODUCTION:  Patients on dialysis have a high rate of death, mainly of cardiovascular cause. Nephrologists are actively looking for ways to improve patients' outcomes, and alternative dialysis strategies, such as long conventional hemodialysis and hemodiafiltration, are currently being investigated. The aim of this study was to compare anemia, nutrition, inflammation, mineral metabolism, and 3-year survival rates between patients treated with hemodiafiltration and prolonged high-flux hemodialysis (HFH)...
November 2016: Iranian Journal of Kidney Diseases
https://www.readbyqxmd.com/read/27902586/neurological-psychological-and-cognitive-disorders-in-patients-with-chronic-kidney-disease-on-conservative-and-replacement-therapy
#5
Silvia Lai, Oriano Mecarelli, Patrizia Pulitano, Roberto Romanello, Leonardo Davi, Alessia Zarabla, Amalia Mariotti, Maria Carta, Giorgia Tasso, Luca Poli, Anna Paola Mitterhofer, Massimo Testorio, Nicla Frassetti, Paola Aceto, Alessandro Galani, Carlo Lai
Chronic kidney disease (CKD) is a highly prevalent condition in the world. Neurological, psychological, and cognitive disorders, related to CKD, could contribute to the morbidity, mortality, and poor quality of life of these patients. The aim of this study was to assess the neurological, psychological, and cognitive imbalance in patients with CKD on conservative and replacement therapy.Seventy-four clinically stable patients affected by CKD on conservative therapy, replacement therapy (hemodialysis (HD), peritoneal dialysis (PD)), or with kidney transplantation (KT) and 25 healthy controls (HC), matched for age and sex were enrolled...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27896908/bixalomer-in-hyperphosphatemic-patients-with-chronic-kidney-disease-not-on-dialysis-phase-3-randomized-trial
#6
Tadao Akizawa, Hideki Origasa, Chisato Kameoka, Junko Tsukada, Kentarou Kuroishi, Yusuke Yamaguchi
Currently, calcium- or metal-containing phosphate binders are available to treat hyperphosphatemia in predialysis patients with chronic kidney disease. Bixalomer, a non-calcium, metal-free phosphate binder, has not been studied in these patients. We evaluated the efficacy and safety of bixalomer versus placebo for treatment of hyperphosphatemia in Japanese predialysis patients with chronic kidney disease. This multicenter, randomized, double-blind, phase 3 trial, randomized eligible patients 1:1 to receive bixalomer or placebo for 12 weeks...
November 29, 2016: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/27895794/trousseau-s-syndrome-caused-by-bladder-cancer-producing-granulocyte-colony-stimulating-factor-and-parathyroid-hormone-related-protein-a-case-report
#7
Tomonori Kato, Kenji Yasuda, Hiroaki Iida, Akihiko Watanabe, Yasuyoshi Fujiuchi, Shigeharu Miwa, Johji Imura, Akira Komiya
The present study reports a rare case of bladder cancer that caused Trousseau's syndrome, a malignancy-associated hypercoagulative state leading to venous or arterial thrombosis. A 38-year-old Japanese female patient experienced a sudden onset of visual field defects and lower limb weakness. Cerebral magnetic resonance imaging revealed multi-regional hypointense areas compatible with acute cerebral infarction. Despite the repeated administration of anticoagulant treatment with heparin, the condition could not be adequately controlled and thromboembolic events occasionally recurred...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27895088/hormonal-alterations-in-pcos-and-its-influence-on-bone-metabolism
#8
Abhaya Krishnan, Sridhar Muthusami
According to the World Health Organization (WHO) polycystic ovary syndrome (PCOS) occurs in 4-8% of women worldwide. The prevalence of PCOS in Indian adolescents is 12.2% according to ICMR (Indian Council of Medical Research) report. National Institute of Health documented that it affects approximately 5 million women of reproductive age in the United States . Hormonal imbalance is the characteristic of many women with polycystic ovarian syndrome. The impact of various endocrine changes in PCOS women and their relevance to bone remains to be documented...
November 28, 2016: Journal of Endocrinology
https://www.readbyqxmd.com/read/27894941/one-year-of-abaloparatide-a-selective-peptide-activator-of-the-pth1-receptor-increased-bone-mass-and-strength-in-ovariectomized-rats
#9
Aurore Varela, Luc Chouinard, Elisabeth Lesage, Robert Guldberg, Susan Y Smith, Paul J Kostenuik, Gary Hattersley
Abaloparatide is a novel 34 amino acid peptide selected to be a potent and selective activator of the parathyroid hormone receptor 1 (PTHR1) signaling pathway. The effects of 12months of abaloparatide treatment on bone mass, bone strength and bone quality was assessed in osteopenic ovariectomized (OVX) rats. SD rats were subjected to OVX or sham surgery at 6months of age and left untreated for 3months to allow OVX-induced bone loss. Eighteen OVX rats were sacrificed after this bone depletion period, and the remaining OVX rats received daily s...
November 25, 2016: Bone
https://www.readbyqxmd.com/read/27894216/bone-effects-of-canagliflozin-a-sodium-glucose-co-transporter-2-inhibitor-in-patients-with-type-2-diabetes-mellitus
#10
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/27881592/the-c-3%C3%AE-epimer-of-25-hydroxycholecalciferol-from-endogenous-and-exogenous-sources-supports-normal-growth-and-bone-mineral-density-in-weanling-rats
#11
Marija Djekic-Ivankovic, Paula Lavery, Sherry Agellon, Hope A Weiler
BACKGROUND: The C-3α epimer of 25-hydroxycholecalciferol [3-epi-25(OH)D3] is elevated in infants. OBJECTIVES: We tested whether increasing cholecalciferol intake results in a dose-response in plasma 3-epi-25(OH)D3 We also examined bone and mineral metabolism in response to 3-epi-25(OH)D3 treatment. METHODS: Sprague Dawley rats (4 wk old) were randomly assigned (n = 6/group of each sex) to AIN-93G diets with cholecalciferol at 1 (control), 2, or 4 IU/g diet for objective 1 and to diets with 3-epi-25(OH)D3 at 0...
November 23, 2016: Journal of Nutrition
https://www.readbyqxmd.com/read/27866993/micrornas-223-3p-and-93-5p-in-patients-with-chronic-kidney-disease-before-and-after-renal-transplantation
#12
M Ulbing, A H Kirsch, B Leber, S Lemesch, J Münzker, N Schweighofer, D Hofer, O Trummer, A R Rosenkranz, H Müller, K Eller, V Stadlbauer, B Obermayer-Pietsch
Chronic kidney disease (CKD) is associated with a multifactorial dysregulation of bone and vascular calcification and closely linked to increased cardiovascular mortality and concomitant bone disease. We aimed to investigate specific microRNA (miRNA) signatures in CKD patients to find indicators for vascular calcification and/or bone mineralization changes during CKD and after kidney transplantation (KT). A miRNA array was used to investigate serum miRNA profiles in CKD patients, then selected miRNAs were quantified in a validation cohort comprising 73 patients in CKD stages 3 to 5, 67 CKD patients after KT, and 36 healthy controls...
November 17, 2016: Bone
https://www.readbyqxmd.com/read/27864717/intraoperative-localization-of-the-parathyroid-glands-with-indocyanine-green-and-firefly-r-technology-during-baba-robotic-thyroidectomy
#13
Hyeong Won Yu, Joon Woo Chung, Jin Wook Yi, Ra-Yeong Song, Joon-Hyop Lee, Hyungju Kwon, Su-Jin Kim, Young Jun Chai, June Young Choi, Kyu Eun Lee
BACKGROUND: It is unclear whether near-infrared (NIR) light-induced indocyanine green (ICG) fluorescence can effectively identify, and thus permit the preservation of, parathyroid glands in bilateral axillo-breast approach (BABA) robotic thyroidectomy. This case-control study with a prospectively recruited consecutive series and a retrospectively selected control group assessed the usefulness of ICG with Firefly(R) technology to identify the parathyroid glands intraoperatively during BABA robotic thyroidectomy...
November 18, 2016: Surgical Endoscopy
https://www.readbyqxmd.com/read/27859596/osteosarcoma-in-a-patient-with-pseudohypoparathyroidism-type-1b-due-to-paternal-uniparental-disomy-of-chromosome-20q
#14
Hye-Sun Park, Chang Gon Kim, Namki Hong, Seok Joo Lee, Da Hea Seo, Yumie Rhee
It is assumed that a persistent high level of parathyroid hormone (PTH) might have a relation with bone malignancy. However, there has been no report of osteosarcoma associated with pseudohypoparathyroidism type 1b (PHP1b), which is accompanied by high PTH. PHP1b is the result of resistance to PTH in certain end-organ tissues, especially the kidney; the response in bone is unaffected because it normally expresses stimulatory G protein equally from both parental alleles. A 21-year-old male, presenting with gum swelling at the right mandible, was referred to a dental clinic...
November 18, 2016: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/27857920/effectiveness-of-osteoporosis-drug-in-postmenopausal-women-with-spinal-compression-fracture-combined-consecutive-therapy-of-teriparatide-and-raloxifene-versus-bisphosphonate-single
#15
Chang Jin Shin, Sion Kim, Chun Sik Choi, Hyun Chul Shin, Young Joon Kwon
OBJECTIVE: Bisphosphonate, a typical bone resorption inhibitor, is an important first-line drug for treating osteoporosis. Recent studies show a novel paradigm in stimulating bone formation. Teriparatide, which is composed of recombinant human parathyroid hormone, stimulates osteoblasts and induces bone regeneration. Bone mineral density (BMD) that was used before and after the treatment with anti-osteoporosis drug was compared for the effectiveness in therapy between a combination of teriparatide and selective estrogen receptor modulator (SERM), and bisphosphonate...
October 2016: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/27857062/identification-of-an-orally-active-small-molecule-pthr1-agonist-for-the-treatment-of-hypoparathyroidism
#16
Tatsuya Tamura, Hiroshi Noda, Eri Joyashiki, Maiko Hoshino, Tomoyuki Watanabe, Masahiko Kinosaki, Yoshikazu Nishimura, Tohru Esaki, Kotaro Ogawa, Taiji Miyake, Shinichi Arai, Masaru Shimizu, Hidetomo Kitamura, Haruhiko Sato, Yoshiki Kawabe
Parathyroid hormone (PTH) is essential for calcium homeostasis and its action is mediated by the PTH type 1 receptor (PTHR1), a class B G-protein-coupled receptor. Hypoparathyroidism and osteoporosis can be treated with PTH injections; however, no orally effective PTH analogue is available. Here we show that PCO371 is a novel, orally active small molecule that acts as a full agonist of PTHR1. PCO371 does not affect the PTH type 2 receptor (PTHR2), and analysis using PTHR1-PTHR2 chimeric receptors indicated that Proline 415 of PTHR1 is critical for PCO371-mediated PTHR1 activation...
November 18, 2016: Nature Communications
https://www.readbyqxmd.com/read/27855990/-parathyroid-disease-the-full-spectrum-from-adenoma-to-carcinoma-report-of-3-cases
#17
Enrique Stoopen-Margain, Sofía Valanci-Aroesty, Leopoldo Castañeda-Martínez, Javier Baquera-Heredia, Juan Carlos Sainz-Hernández
BACKGROUND: Primary hyperparathyroidism is a disease characterised by the autonomous production of parathyroid hormone. The most common cause is an adenoma, followed by hyperplasia, and rarely carcinoma. CLINICAL CASES: Three cases are presented. The first case is associated with a brown tumour that was diagnosed as hyperplasia after study and surgery. The second case was related to pathological fractures, and a lower right adenoma 236 times bigger than a normal parathyroid was excised...
November 14, 2016: Cirugia y Cirujanos
https://www.readbyqxmd.com/read/27847384/parathyroid-hormone-induced-bone-marrow-mesenchymal-stem-cell-chondrogenic-differentiation-and-its-repair-of-articular-cartilage-injury-in-rabbits
#18
Yushu Chen, Yi Chen, Shujiang Zhang, Xiufan Du, Bo Bai
BACKGROUND We explored the effect of parathyroid hormone (PTH)-induced bone marrow stem cells (BMSCs) complexed with fibrin glue (FG) in the repair of articular cartilage injury in rabbits. MATERIAL AND METHODS Forty-eight rabbits randomized into four groups were subjected to articular surgery (cartilage loss). The PTH and non-PTH intervention groups included transplantation with PTH/BMSC/FG xenogeneic and BMSC/FG xenogeneic complexes, respectively, into the injured area. The injured group contained no transplant while the control group comprised rabbits without any articular injury...
November 16, 2016: Medical Science Monitor Basic Research
https://www.readbyqxmd.com/read/27845598/efficacy-of-microwave-ablation-for-severe-secondary-hyperparathyroidism-in-subjects-undergoing-hemodialysis
#19
Zongli Diao, Liyan Wang, Dishan Li, Wenhu Liu
Severe secondary hyperparathyroidism (SHPT) is a serious problem in patients undergoing hemodialysis. The efficacy and safety of microwave ablation (MWA), a minimally invasive treatment, for severe SHPT are as yet unclear. To clarify the role of MWA, we administered it to patients with severe SHPT and assessed its efficacy and safety. This was a prospective, single-center, single-arm, clinical trial. We enrolled patients with severe SHPT attending our hemodialysis center who met the inclusion and exclusion criteria...
November 15, 2016: Renal Failure
https://www.readbyqxmd.com/read/27830521/surgical-treatment-of-secondary-hyperparathyroidism-in-elderly-patients-an-institutional-experience
#20
Andrea Polistena, Alessandro Sanguinetti, Roberta Lucchini, Segio Galasse, Stefano Avenia, Massimo Monacelli, Louis Banka Johnson, Bengt Jeppsson, Nicola Avenia
BACKGROUND: Secondary hyperparathyroidism in elderly fragile patients presents clinical difficulties due to severity of symptoms and related comorbidity. The optimal surgical approach for this group of patients is still debated. AIM: The aim of the study was to define the optimal technique of parathyroidectomy in elderly patients with secondary hyperparathyroidism. METHODS: Retrospective analysis in a series of 253 patients including 35 elderly individuals at a single institution was carried out...
November 9, 2016: Aging Clinical and Experimental Research
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