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Hypophosphatemia

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https://www.readbyqxmd.com/read/28730291/electrolyte-disorders-with-platinum-based-chemotherapy-mechanisms-manifestations-and-management
#1
REVIEW
Bryan Oronsky, Scott Caroen, Arnold Oronsky, Vaughn E Dobalian, Neil Oronsky, Michelle Lybeck, Tony R Reid, Corey A Carter
Platinum chemotherapy, particularly cisplatin, is commonly associated with electrolyte imbalances, including hypomagnesemia, hypokalemia, hypophosphatemia, hypocalcemia and hyponatremia. The corpus of literature on these dyselectrolytemias is large; the objective of this review is to synthesize the literature and summarize the mechanisms responsible for these particular electrolyte disturbances in the context of platinum-based treatment as well as to present the clinical manifestations and current management strategies for oncologists and primary care physicians, since the latter are increasingly called on to provide care for cancer patients with medical comorbidities...
July 20, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28728941/comparison-of-calcimimetic-r568-and-calcitriol-in-mineral-homeostasis-in-the-hyp-mouse-a-murine-homolog-of-x-linked-hypophosphatemia
#2
Maren Leifheit-Nestler, Julia Kucka, Emi Yoshizawa, Geert Behets, Patrick D'Haese, Christian Bergen, Martin Meier, Dagmar-Christiane Fischer, Dieter Haffner
X-linked hypophosphatemia (XLH) caused by mutations in the Phex gene is the most common human inherited phosphate wasting disorder characterized by enhanced synthesis of fibroblast growth factor 23 (FGF23) in bone, renal phosphate wasting, 1,25(OH)2D3 (1,25D) deficiency, rickets and osteomalacia. Here we studied the effects of calcimimetic R568 and calcitriol treatment in the Hyp mouse, a murine homolog of XLH. We hypothesized that mineral homeostasis is differentially affected by R568 and 1,25D with respect to the PTH-vitamin D-FGF23-Klotho axis and bone health...
July 18, 2017: Bone
https://www.readbyqxmd.com/read/28725949/tubulointerstitial-nephritis-induced-hypophosphatemic-osteomalacia-in-sj%C3%A3-gren-s-syndrome-a-case-report-and-review-of-the-literature
#3
REVIEW
Yan Geng, Youlu Zhao, Zhuoli Zhang
Sjögren's syndrome (SS) is a chronic autoimmune inflammatory disease that typically affects the salivary and lacrimal glands. Renal involvement is relatively uncommon and may precede other complaints. Tubulointestitial nephritis (TIN) is the most common renal involvement in SS. Osteomalacia occurring as the first manifestation of renal tubular disorder due to SS is very rare. We report a 39-year-old male who presented with polydipsia, polyuria, and multiple bone pain. Bone density test showed severe osteoporosis, and laboratory findings suggested hypokalemia, hypophosphatemia, and vitamin D deficiency, which supported the diagnosis of hypophosphatemic osteomalacia...
July 20, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28713755/tumor-induced-osteomalacia-a-sherlock-holmes-approach-to-diagnosis-and-management
#4
G V Chanukya, Manoj Mengade, Jagadishwar Goud, I Satish Rao, Anuj Jain
Tumor-induced osteomalacia (TIO) is a subtype of paraneoplastic syndrome associated with hypophosphatemia due to renal phosphate wasting in adults. The humoral factor responsible for clinical picture known as fibroblast growth factor 23 (FGF23) is most often secreted by benign yet elusive mesenchymal tumors, difficult to localize, access, and excise completely; rarely, they are multiple and malignant. Paradoxical inappropriately normal or low levels of 1,25-dihydroxyvitamin D in the setting of hypophosphatemia is due to suppressive effect of FGF23...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28690207/hypophosphatemia-after-hepatectomy-or-pancreatectomy-role-of-the-nicotinamide-phosphoribosyltransferase
#5
Jian Zheng, Ilya G Glezerman, Eran Sadot, Anjuli McNeil, Cristina Zarama, Mithat Gönen, John Creasy, Linda M Pak, Vinod P Balachandran, Michael I D'Angelica, Peter J Allen, Ronald P DeMatteo, T Peter Kingham, William R Jarnagin, Edgar A Jaimes
BACKGROUND: Postoperative hypophosphatemia is common and is associated with a lower risk of liver failure after hepatectomy but higher morbidity after pancreatectomy. Whether different physiologic mechanisms underlie the hypophosphatemia associated with these very different clinical outcomes is unclear. This study aims to evaluate the underlying mechanism in postoperative hypophosphatemia. STUDY DESIGNS: We prospectively enrolled 120 patients who underwent major hepatectomy (n=30), minor hepatectomy (n=30), pancreatectomy (n=30), and laparotomy without resection (control group, n=30)...
July 6, 2017: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/28689456/chest-deformity-and-disability-due-to-tenofovir-induced-hypophosphatemic-osteomalacia-case-report-and-call-for-improved-global-access-to-laboratory-testing
#6
Jan Hajek, Simple Ouma, Juliya Hemmett, Rob Starko, Paska Apiyo
Millions of people worldwide take tenofovir disoproxil fumarate (TDF) for the treatment of human immunodeficiency virus (HIV) and/or hepatitis B infection. Although generally safe and well tolerated, clinicians need to be aware that TDF can cause proximal renal tubular dysfunction and loss of bone mineral density, especially in patients with concomitant renal disease or other risk factors. We present the case of a patient with chronic HIV infection and urethral stricture who developed TDF-related proximal renal tubular dysfunction with hypophosphatemia and osteomalacia, presenting with bone pains, skeletal deformity, and disability...
January 1, 2017: Journal of the International Association of Providers of AIDS Care
https://www.readbyqxmd.com/read/28687627/phase-ii-trial-of-sorafenib-in-combination-with-capecitabine-in-patients-with-hepatocellular-carcinoma-inst-08-20
#7
Yehuda Patt, Cristhiam Rojas-Hernandez, Houman Mohammad Fekrazad, Pranshu Bansal, Fa Chyi Lee
LESSONS LEARNED: There continues to be a lack of systemic options for advanced hepatocellular carcinoma (HCC); sorafenib and, very recently, regorafenib are the only approved options. There exists a potential to combine sorafenib with chemotherapeutic agents shown to be active in HCC, such as capecitabine, safely.Good tumor response was observed, with objective improvement in a few patients seldom seen by single agent sorafenib; however, because of the limited number of patients, meaningful conclusions on survival cannot be drawn...
July 7, 2017: Oncologist
https://www.readbyqxmd.com/read/28686309/absence-of-calcitriol-causes-increased-lactational-bone-loss-and-lower-milk-calcium-but-does-not-impair-post-lactation-bone-recovery-in-cyp27b1-null-mice
#8
Brittany R Gillies, Brittany A Ryan, Brett A Tonkin, Ingrid J Poulton, Yue Ma, Beth J Kirby, René St-Arnaud, Natalie A Sims, Christopher S Kovacs
We hypothesized that adaptation to calcium supply demands of pregnancy and lactation do not require calcitriol. Adult Cyp27b1 null mice lack calcitriol and have hypocalcemia, hypophosphatemia, and rickets. We studied wild-type (WT) and null sister pairs raised on a calcium, phosphorus and lactose-enriched "rescue" diet that prevents hypocalcemia and rickets. Bone mineral content (BMC) increased >30% in pregnant nulls, declined 30% during lactation, and increased 30% by 4 weeks post-weaning. WT showed less marked changes...
July 7, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28672949/long-term-adefovir-therapy-may-induce-fanconi-syndrome-a-report-of-four-cases
#9
Fan Pan, Yingchao Wang, Xin Zhang, Qingfeng Lin, Xiaolong Liu, Yi Jiang, Chen Pan
Fanconi syndrome is a rare disease characterized by dysfunction of the proximal renal tubules as a result of various pathogenic events. Drug-induced Fanconi syndrome may be neglected or misdiagnosed, which increases the level of suffering. The aim of the present study was to conduct an investigation into the effects of adefovir (ADV)-induced Fanconi syndrome. Four typical cases of Fanconi syndrome caused by long-term ADV therapy (2-9 years) were diagnosed at our hospital. A complete medical and therapy history was collected from all four patients prior to a physical examination...
July 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28670655/erratum-to-tumour-genesis-syndrome-severe-hypophosphatemia-and-hypokalemia-may-be-ominous-presenting-findings-in-childhood-acute-myeloid-leukaemia
#10
Winnie Ky Chan, Kai On Chang, Wing Hung Lau
No abstract text is available yet for this article.
August 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28669007/nephrocalcinosis-in-a-young-male-with-anorexia-nervosa
#11
Nicholas Chadi, Simon Carter, Robert P Y Loung, Michelle Gould, Katherine Hick
Nephrocalcinosis (NC) has been described as a long-term complication of anorexia nervosa (AN). This is the first report of this complication in an adolescent male patient. We describe the case of a 12-year-old male with AN who presented with acute food restriction and excessive exercising leading to three inpatient admissions. The patient experienced an isolated episode of dysuria and hematuria while on calcium and vitamin D supplementation. Investigations revealed hypophosphatemia, hypercalciuria and mild NC...
July 1, 2017: CEN Case Reports
https://www.readbyqxmd.com/read/28645941/a-first-time-in-human-study-of-gsk2636771-a-phosphoinositide-3-kinase-beta-selective-inhibitor-in-patients-with-advanced-solid-tumors
#12
Joaquin Mateo, Gopinath Ganji, Charlotte Lemech, Howard A Burris, Sae-Won Han, Karen E Swales, Shaun Decordova, Maurice P DeYoung, Deborah A Smith, Shanker Kalyana-Sundaram, Jiuhua Wu, Monica Motwani, Rakesh Kumar, Jerry M Tolson, Sun Young Rha, Hyun Cheol Chung, Joseph Paul Eder, Sunil Sharma, Yung-Jue Bang, Jeffrey R Infante, Li Yan, Johann S de Bono, Hendrik-Tobias Arkenau
The phosphoinositide 3 kinase (PI3K)/protein kinase B (AKT) pathway is commonly activated in several tumor types. Selective targeting of p110β could result in successful pathway inhibition while avoiding the on and off target effects of pan-PI3K inhibitors. GSK2636771 is a potent, orally bioavailable, adenosine triphosphate-competitive, selective inhibitor of PI3Kβ.<br /><br />Experimental Design: <p>We evaluated the safety, pharmacokinetics, pharmacodynamics and antitumor activity of GSK2636771 to define the recommended Phase II dose (RP2D)...
June 23, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28645356/-endocrine-control-of-serum-phosphate-from-the-discoveries-of-phosphatonins-to-novel-therapies
#13
A Linglart, C Chaussain
Phosphate is absorbed through the gut, stored in the bone and reabsorbed through the proximal renal tubule. More importantly, PTH and FGF23 have been identified as the main phosphaturic factors that control the expression of the phosphate co-transporters NaPi-IIa et IIc. By allowing the adjustment of the urinary phosphate reabsorption, these two phosphatonins play a major role in bone and tooth mineralization and growth. Recently, novel therapies have successfully targeted the FGF23 signaling pathway to treat the hypophosphatemia in patients affected with molecular defects of this pathway (mutations in the PHEX gene)...
October 2016: Annales D'endocrinologie
https://www.readbyqxmd.com/read/28620595/the-predicting-ability-of-serum-phosphorus-to-assess-the-duration-of-mechanical-ventilation-in-critically-ill-patients
#14
Reihanak Talakoub, Mahshid Bahrami, Azim Honarmand, Saeed Abbasi, Hamideh Gerami
BACKGROUND: No previous study exists to evaluate serum phosphorus (Ph) level as a predictor of the need to mechanical ventilation (MV). This study was designed to determine the predictive ability of admission serum Ph level on MV in patients admitted in Intensive Care Unit (ICU). MATERIALS AND METHODS: This prospective study was conducted on 100 patients (>16 years old), admitted to our ICU over 1-year. Patients were classified into two groups according to the days of the need to MV...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28620244/specific-ablation-of-mouse-fam20c-in-cells-expressing-type-i-collagen-leads-to-skeletal-defects-and-hypophosphatemia
#15
Peihong Liu, Su Ma, Hua Zhang, Chao Liu, Yongbo Lu, Li Chen, Chunlin Qin
FAM20C mutations in humans cause Raine syndrome and our previous studies showed that global inactivation of mouse Fam20C led to bone and dental defects. By crossbreeding 2.3  kb Col 1a1-Cre mice with Fam20C (flox/flox) mice, we created 2.3  kb Col 1a1-Cre;Fam20C (foxl/flox) (cKO) mice, in which Fam20C was inactivated in cells expressing Type I collagen. This study showed that the long bones of cKO mice were shorter and had a lower level of mineralization compared to the normal mice. The collagen fibrils in Fam20C-deficient bone were disorganized and thicker while the growth plate cartilage in cKO mice was disorganized and wider compared to the normal mice...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28616212/hypophosphatemia-in-critically-ill-patients-with-acute-kidney-injury-treated-with-hemodialysis-is-associated-with-adverse-events
#16
Cynthia Lim, Han Khim Tan, Manish Kaushik
Background. Hypophosphatemia in critically ill patients may be exacerbated by renal replacement therapy (RRT). We aimed to identify risk factors and adverse outcomes associated with hypophosphatemia in intensive care patients treated with RRT for acute kidney injury (AKI). Methods. This was a secondary analysis of data from a single-center prospective cohort study of medical and surgical intensive care patients with RRT for AKI between 18 December 2010 and 3 April 2013. Demographic, comorbidity, laboratory and RRT data were retrieved from patient case notes and electronic medical records...
June 2017: Clinical Kidney Journal
https://www.readbyqxmd.com/read/28608052/craniofacial-and-dental-characteristics-of-patients-with-vitamin-d-dependent-rickets-type-1a-compared-to-controls-and-patients-with-x-linked-hypophosphatemia
#17
Hans Gjørup, Signe Sparre Beck-Nielsen, Dorte Haubek
ᅟOBJECTIVES: Vitamin-D-dependent rickets type 1A (VDDR1A) is a rare inherited disease caused by defective activation of vitamin D. The aim of the study was to describe the craniofacial characteristics and the dental phenotype of patients with genetically confirmed VDDR1A. The VDDR1A findings were compared to findings in patients with X-linked hypophosphatemia (XLH) and healthy controls. MATERIAL AND METHODS: Ten patients with VDDR1A were identified. The reference group for the comparison of cephalometric findings was 49 adults without chronic disease...
June 12, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28603080/a-novel-auditory-ossicles-membrane-and-the-development-of-conductive-hearing-loss-in-dmp1-null-mice
#18
Kun Lv, Haiyang Huang, Xing Yi, Mark E Chertoff, Chaoyuan Li, Baozhi Yuan, Robert J Hinton, Jian Q Feng
Genetic mouse models are widely used for understanding human diseases but we know much less about the anatomical structure of the auditory ossicles in the mouse than we do about human ossicles. Furthermore, current studies have mainly focused on disease conditions such as osteomalacia and rickets in patients with hypophosphatemia rickets, although the reason that these patients develop late-onset hearing loss is unknown. In this study, we first analyzed Dmp1 lac Z knock-in auditory ossicles (in which the blue reporter is used to trace DMP1 expression in osteocytes) using X-gal staining and discovered a novel bony membrane surrounding the mouse malleus...
June 8, 2017: Bone
https://www.readbyqxmd.com/read/28600887/therapeutic-effects-of-fgf23-c-tail-fc-in-a-murine-pre-clinical-model-of-x-linked-hypophosphatemia-via-the-selective-modulation-of-phosphate-reabsorption
#19
Kristen Johnson, Kymberly Levine, Joseph Sergi, Jean Chamoun, Rachel Roach, Jackie Vekich, Mike Favis, Mark Horn, Xianjun Cao, Brian Miller, William Snyder, Dikran Aivazian, William Reagan, Edwin Berryman, Jennifer Colangelo, Victoria Markiewicz, Cedo Bagi, Thomas P Brown, Anthony Coyle, Moosa Mohammadi, Jeanne Magram
Fibroblast growth factor 23 (FGF23) is the causative factor of X-linked hypophosphatemia (XLH), a genetic disorder effecting 1:20,000 that is characterized by excessive phosphate excretion, elevated FGF23 levels and a rickets/osteomalacia phenotype. FGF23 inhibits phosphate reabsorption and suppresses 1α,25-dihydroxyvitamin D (1,25D) biosynthesis, analytes that differentially contribute to bone integrity and deleterious soft tissue mineralization. As inhibition of ligand broadly modulates downstream targets, balancing efficacy and unwanted toxicity is difficult when targeting the FGF23 pathway...
June 10, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28592620/phase-ii-study-of-first-line-trebananib-plus-sorafenib-in-patients-with-advanced-hepatocellular-carcinoma
#20
Ghassan K Abou-Alfa, Jean-Frederic Blanc, Steven Miles, Tom Ganten, Jörg Trojan, Jonathan Cebon, Andre K Liem, Lara Lipton, Charu Gupta, Benjamin Wu, Michael Bass, Ellen Hollywood, Jennifer Ma, Margaret Bradley, Jason Litten, Leonard B Saltz
LESSONS LEARNED: Trebananib leveraging anti-angiogenic mechanism that is distinct from the classic sorafenib anti-vascular endothelial growth factor inhibition did not demonstrate improved progression-free survival at 4 months in patients with advanced hepatocellular carcinoma (HCC).In support of previously reported high Ang-2 levels' association with poor outcome in HCC for patients, trebananib treatment with lower baseline Ang-2 at study entry was associated with improved overall survival to 22 months and may suggest future studies to be performed within the context of low baseline Ang-2...
July 2017: Oncologist
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