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https://www.readbyqxmd.com/read/28914984/hypercalcemic-disorders-in-children
#1
REVIEW
Victoria J Stokes, Morten F Nielsen, Fadil M Hannan, Rajesh V Thakker
Hypercalcemia is defined as a serum calcium concentration that is greater than 2 standard deviations above the normal mean, which in children may vary with age and sex, reflecting changes in the normal physiology at each developmental stage. Hypercalcemic disorders in children may present with hypotonia, poor feeding, vomiting, constipation, abdominal pain, lethargy, polyuria, dehydration, failure to thrive and seizures. In severe cases renal failure, pancreatitis and reduced consciousness may also occur and older children and adolescents may present with psychiatric symptoms...
September 15, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28914969/autocrine-and-paracrine-regulation-of-the-murine-skeleton-by-osteocyte-derived-parathyroid-hormone-related-protein
#2
Niloufar Ansari, Patricia W M Ho, Blessing Crimeen-Irwin, Ingrid J Poulton, Athena R Brunt, Mark R Forwood, Paola Divieti Pajevic, Jonathan H Gooi, T John Martin, Natalie A Sims
Parathyroid hormone related-protein (PTHrP) and parathyroid hormone (PTH) have N-terminal domains that bind a common receptor, PTHR1. N-terminal PTH (teriparatide) and now a modified N-terminal PTHrP (abaloparatide) are FDA-approved therapies for osteoporosis. In physiology, 00PTHrP does not normally circulate at significant levels, but acts locally and osteocytes, cells residing within the bone matrix, express both PTHrP and the PTHR1. Since PTHR1 in osteocytes is required for normal bone resorption, we determined how osteocyte-derived PTHrP influences the skeleton...
September 15, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28914962/impaired-phosphate-tolerance-revealed-with-an-acute-oral-challenge
#3
Mandy E Turner, Christine A White, Wilma M Hopman, Emilie C Ward, Paul S Jeronimo, Michael A Adams, Rachel M Holden
Elevated serum phosphate is consistently linked with cardiovascular disease (CVD) events and mortality in the setting of normal and impaired kidney function. However, serum phosphate does not often exceed the upper limit of normal until glomerular filtration rate (GFR) falls below 30 mL/min/m(2) . It was hypothesized that the response to an oral, bioavailable phosphate load will unmask impaired phosphate tolerance, a maladaptation not revealed by baseline serum phosphate concentrations. In this study rats with varying kidney function as well as normo-phosphatemic human subjects, with inulin-measured GFR (13...
September 15, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28912096/analytical-verification-and-method-comparison-of-the-advia-centaur%C3%A2-intact-parathyroid-hormone-assay
#4
Esther Fernández, Josep Lluís Bedini, Xavier Filella
OBJECTIVES: This study is the first verification of the novel iPTH Siemens ADVIA Centaur® Intact Parathyroid Hormone (iPTHm) chemiluminescence immunoassay based on monoclonal antibodies. We also compared the iPTH results obtained using this assay with the previous ADVIA Centaur® Parathyroid Hormone assay (iPTHp) based on polyclonal antibodies. DESIGN AND METHODS: The analytical performance study of iPTHm assay included LoD, LoQ, intra- and inter-assay reproducibility, and linearity...
September 11, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28906406/parathyroid-hormone-in-relation-to-various-vitamin-d-metabolites-in-adult-females
#5
Nasser M Al-Daghri, Sobhy Yakout, Ihtisham Bukhari, Malak N K Khattak, Yousef Al-Saleh, Naji Aljohani, Omar S Al-Attas, Majed Alokail
Vitamin D binding protein (DBP) and albumin are the important determinants of circulatory 25(OH)D in adults. Physiological function of vitamin D is particularly regulated by DBPs. Serum parathyroid hormone (PTH) is considered as the biological activity reader of circulating 25(OH)D. We therefore examined the relationships between serum total, free, and bioavailable 25(OH)D versus PTH in apparently healthy Saudi female adults.A total of 350 apparently healthy Saudi female adults ([Mean ± standard deviation] age [years] 52...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28906318/nutritional-state-and-feeding-behaviors-of-children-with-eosinophilic-esophagitis-and-gastroesophageal-reflux-disease
#6
Pooja Mehta, Glenn T Furuta, Taryn Brennan, Michelle L Henry, Nancy Creskoff Maune, Shikha S Sundaram, Calies Menard-Katcher, Dan Atkins, Faith Takurukura, Sandra Giffen, Zhaoxing Pan, Angela M Haas
OBJECTIVE: Because both gastroesophageal reflux disease (GERD) and eosinophilic esophagitis (EoE) are associated with malnutrition and feeding dysfunction, this study compares growth, nutrition and feeding behaviors in children with GERD and EoE. METHODS: Subjects aged 1-7 with GERD or EoE were enrolled in a prospective study. Assessments included length/height, weight, 3-day food diary, serum biomarkers of nutrition, and the Behavioral Pediatric Feeding Assessment Scale (BPFAS)...
September 12, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28904570/bone-mineral-status-in-children-with-epilepsy-biochemical-and-radiologic-markers
#7
Bothina Hasaneen, Riad Moustafa Elsayed, Nanees Salem, Ashraf Elsharkawy, Noha Tharwat, Khaled Fathy, Amany El-Hawary, Hadil M Aboelenin
OBJECTIVE: The aim of this study is to assess bone mineral status in children with epilepsy, on different antiepileptic drugs (AEDs) regimen, using dual-energy X-ray absorptiometry (DXA) and routine biochemical bone markers. PATIENTS AND METHODS: This is observational prospective controlled cohort study, conducted at Mansoura University Children Hospital, from January 2014 to June 2015. In this study, we had 152 participants with ages 3-13 years, 70 children diagnosed with epilepsy and 82 were controls...
April 2017: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28902630/pseudohypoparathyroidism-type-1b-associated-with-assisted-reproductive-technology
#8
Monica Fernandez, Maria Jose Zambrano, Joel Riquelme, Claudia Castiglioni, Marie-Laure Kottler, Harald Jüppner, Veronica Mericq
Evidence suggests an increased incidence of imprinting disorders in children conceived by assisted reproductive technologies (ART). Maternal loss-of-methylation at GNAS exon A/B, observed in pseudohypoparathyroidism type 1b (PHP1B), leads to decreased expression of the stimulatory Gsα. We present a patient conceived by ART, who presented at age 4 years with delayed neurocognitive development and persistently increased creatine kinase (CK). At 6 years an elevated PTH was detected with normal calcium and a low 25(OH) vitamin D level (25OHD)...
September 13, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28901272/disorders-of-mechanisms-of-calcium-metabolism-control-as-potential-risk-factors-of-prostate-cancer
#9
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/28901264/inhibition-of-proliferation-and-induction-of-apoptosis-by-thymoquinone-via-modulation-of-tgf-family-p53-p21-and-bcl-2%C3%AE-in-leukemic-cells
#10
Mona Diab Assaf, Josiane Semaan, Marwan El-Sabban, Soad K Al-Jaouni, Rania Azar, Mohammad Amjad Kamal, Steve Harakeh
The rationale of the current study was to investigate whether the inverse association between vitamin D deficiency and parathyroid hormone levels is age-dependent and whether it has any role in modulating renal function and insulin resistance. To test this hypothesis, we have carried out a hospital based study enrolling 848 subjects (558 men and 290 women) with the mean age of 50.9±15.9 y. Vitamin D deficiency was predominant irrespective of age group (p=0.21) and gender (p=0.12). An inverse association between vitamin D and PTH was observed (r= -0...
September 12, 2017: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28898923/repurposing-a-novel-parathyroid-hormone-pth-analog-to-treat-hypoparathyroidism
#11
Venkatesh Krishnan, Yanfei L Ma, Catherine Z Chen, Natasha Thorne, Heather Bullock, Gregory Tawa, Christy Javella-Cauley, Shaoyou Chu, Weiming Li, Wayne Kohn, Mary D Adrian, Charles Benson, Lifei Liu, Masahiko Sato, Wei Zheng, Andre M Pilon, N Nora Yang, Henry U Bryant
BACKGROUND AND PURPOSE: Human parathyroid hormone (PTH) is critical for maintaining physiologic calcium homeostasis, and plays an important role in the formation and maintenance of bone. Full-length PTH and a truncated peptide form are approved for treatment of hypoparathyroidism and osteoporosis, respectively. Our initial goal was to develop an improved PTH therapy for osteoporosis, but clinical development was halted. The novel asset was then repurposed as an improved therapy for hypoparathyroidism...
September 12, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28894614/pancreatic-adenocarcinoma-producing-parathyroid-hormone-related-protein
#12
Reiko Yamada, Kyosuke Tanaka, Hiroyuki Inoue, Takashi Sakuno, Tetsuro Harada, Naohiko Yoshizawa, Hiroshi Miura, Toshihumi Takeuchi, Misaki Nakamura, Masaki Katsurahara, Yasuhiko Hamada, Noriyuki Horiki, Yoshiyuki Takei
A 48-year-old woman presented to our hospital with a 1-year history of a continuous high fever. She was diagnosed with metastatic pancreatic adenocarcinoma accompanied by leukocytosis without infection. Her serum concentration of granulocyte colony-stimulating factor was highly elevated. Forty-five days after initiating chemotherapy, she was readmitted because of a neuropsychiatric disturbance and hypercalcemia. Her serum concentration of parathyroid hormone-related protein (PTH-rP) was elevated. A pretreatment biopsy specimen showed strong cytoplasmic immunoreactivity to anti-PTH-rP antibody, suggesting that overproduction of PTH-rP accounted for the hypercalcemia...
2017: Case Reports in Oncological Medicine
https://www.readbyqxmd.com/read/28894263/the-parathyroid-hormone-regulates-skin-tumour-susceptibility-in-mice
#13
Kazuhiro Okumura, Megumi Saito, Yasuhiro Yoshizawa, Haruka Munakata, Eriko Isogai, Ikuo Miura, Shigeharu Wakana, Midori Yamaguchi, Hiroshi Shitara, Choji Taya, Andrew C Karaplis, Ryo Kominami, Yuichi Wakabayashi
Using a forward genetics approach to map loci in a mouse skin cancer model, we previously identified a genetic locus, Skin tumour modifier of MSM 1 (Stmm1) on chromosome 7, conferring strong tumour resistance. Sub-congenic mapping localized Parathyroid hormone (Pth) in Stmm1b. Here, we report that serum intact-PTH (iPTH) and a genetic polymorphism in Pth are important for skin tumour resistance. We identified higher iPTH levels in sera from cancer-resistant MSM/Ms mice compared with susceptible FVB/NJ mice...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28892641/independent-assortment-of-gc-gene-polymorphism-rs2282679-and-25-hydroxyvitamin-d-levels-in-coronary-artery-disease
#14
Nada Sedky, Sally Hassanein, Mohamed Gad
BACKGROUND: Coronary artery disease (CAD) remains a major public health burden. Emerging research has suggested an association between vitamin D insufficiency and CAD. Vitamin D binding protein (VDBP) is the primary vitamin D carrier and many of its genetic polymorphisms are able to induce the expression of proteins with different affinities for the vitamin, which in turn, might affect its serum levels and CAD incidence. SUBJECTS/METHODS: 112 male patients, aged between 35 and 50, with verified CAD and 109 age- and sex-matched controls were recruited...
September 11, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28888222/primary-hyperparathyroidism-caused-by-enormous-unilateral-water-clear-cell-parathyroid-hyperplasia
#15
Georgios Boutzios, Helen Sarlanis, Anna Kolindou, Antigoni Velidaki, Theodore Karatzas
BACKGROUND: Parathyroid water-clear cell hyperplasia (WCCH) and water-clear cell adenoma (WCCA) are rare causes of primary hyperparathyroidism. The frequency of WCCH seems to be less than 1% of all primary hyperplasia. CASE PRESENTATION: We report a 53-year-old woman with a large unilateral water clear cell parathyroid hyperplasia associated with primary hyperparathyroidism and severe osteoporosis. Ultrasonography showed a 5.4 cm multilobulated hypoechoic well defined mass localized in the lower half of the left thyroid lobe...
September 9, 2017: BMC Endocrine Disorders
https://www.readbyqxmd.com/read/28888086/stability-of-routine-biochemical-analytes-in-whole-blood-and-plasma-serum-focus-on-potassium-stability-from-lithium-heparin
#16
Anne Marie Dupuy, Jean Paul Cristol, Bruno Vincent, Anne Sophie Bargnoux, Mickael Mendes, Pascal Philibert, Kadda Klouche, Stéphanie Badiou
BACKGROUND: Blood specimens are transported from clinical departments to the biochemistry laboratory by hospital courier service, sometimes over long distances. The aim of this study was to assess the stability of common biochemical analytes in venous blood under our routine transport conditions and to evaluate analyte stability after prompt or delayed centrifugation. METHODS: We investigated pre- and postanalytical contributions of 32 biochemical analytes in plasma and serum samples from 10 patients (healthy adults and patients from intensive care units)...
September 9, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28887146/analysing-the-effect-of-multiple-sclerosis-on-vitamin-d-related-biochemical-markers-of-bone-remodelling
#17
Malachi J McKenna, Barbara Murray, Roisin Lonergan, Ricardo Segurado, Niall Tubridy, Mark T Kilbane
The Irish population is at risk of vitamin D deficiency during the winter months, but the secular trend over the past 40 years is for marked improvement. Multiple sclerosis (MS) is common in Ireland with a latitudinal pattern favouring highest incidence in northern regions; MS is linked strongly with vitamin D status as a causal factor. We sought firstly to study the relationship between vitamin D status and vitamin D-related bone biochemistry, and secondly to evaluate if MS had an independent effect on vitamin D related markers of bone remodelling...
September 5, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28883932/effect-of-vitamin-d3-on-the-antimicrobial-activity-of-human-airway-surface-liquid-preliminary-results-of-a-randomised-placebo-controlled-double-blind-trial
#18
Luis G Vargas Buonfiglio, Marlene Cano, Alejandro A Pezzulo, Oriana G Vanegas Calderon, Joseph Zabner, Alicia K Gerke, Alejandro P Comellas
INTRODUCTION: Vitamin D3 supplementation has been reported to prevent lung infections and increase the gene expression of antimicrobial peptides such as cathelicidin. We investigated the effect of vitamin D3 supplementation on the antimicrobial activity of airway surface liquid (ASL) in human subjects. Since smoking can increase the risk of respiratory infections, we also investigated the effect of smoking in the cathelicidin response to vitamin D3 in human airway epithelia in vitro. METHODS: This study is a subanalysis of single-centre community-based randomised placebo-controlled double-blind trial...
2017: BMJ Open Respiratory Research
https://www.readbyqxmd.com/read/28882871/independent-and-synergistic-associations-of-biomarkers-of-vitamin-d-status-with-risk-of-coronary-heart-disease
#19
Lu Qi, Wenjie Ma, Yoriko Heianza, Yan Zheng, Tiange Wang, Dianjianyi Sun, Eric B Rimm, Frank B Hu, Edward Giovannucci, Christine M Albert, Kathryn M Rexrode, JoAnn E Manson
OBJECTIVE: To comprehensively evaluate the independent associations and potential interactions of vitamin D-related biomarkers including total and bioavailable 25-hydroxyvitamin D (25OHD), VDBP (vitamin D binding protein), and parathyroid hormone (PTH) with risk of coronary heart disease (CHD). APPROACH AND RESULTS: We prospectively identified incident cases of nonfatal myocardial infarction and fatal CHD among women in the Nurses' Health Study during 20 years of follow-up (1990-2010)...
September 7, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28882718/non-traumatic-multiple-vertebral-compression-fractures-induced-by-primary-hyperparathyroidism-a-case-report-and-literature-review
#20
Man Kyu Choi, Sung Min Kim
BACKGROUND: Primary hyperparathyroidism (PHPT) is one of the causes of osteoporosis and is known to increase the fracture risk of bone. However, multiple vertebral compression fracture due to PHPT is extremely rare. CASE DESCRIPTION: A case of acute multiple vertebral compression fracture in a patient with PHPT is described. The fracture occurred suddenly without trauma. The patient had a low T-score (-4.4), and serum hyper-calcemia and phosphatemia were evident...
September 4, 2017: World Neurosurgery
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