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calcium and kidney

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https://www.readbyqxmd.com/read/28351028/influence-of-feeding-types-during-the-first-months-of-life-on-calciuria-levels-in-healthy-infants-a-secondary-analysis-from-a-randomized-clinical-trial
#1
Natalia Ferré, Carmen Rubio-Torrents, Veronica Luque, Ricardo Closa-Monasterolo, Veit Grote, Berthold Koletzko, Piotr Socha, Dariusz Gruszfeld, Jean Paul Langhendries, Anne Sengier, Elvira Verduci, Joaquin Escribano
BACKGROUND/AIMS: Dietary factors can modify calciuria. We aim to investigate urinary calcium excretion in healthy infants according to their protein. METHODS: Secondary data analysis from a randomized clinical trial where healthy term infants were randomized after birth to a higher (HP) or lower (LP) protein content formula that was consumed until age 1 year. A non-randomized group of breastfed (BF) infants was used for reference. Anthropometry, dietary intakes and calciuria (calcium/creatinine ratios) from spot urine samples were assessed at ages 3 and 6 months...
March 29, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28350620/treatment-of-uncomplicated-hypertension-is-associated-with-a-reduction-in-cardiovascular-mortality-a-korean-national-cohort-study
#2
Chan J Lee, Jinseub Hwang, Jaewon Oh, Sang-Hak Lee, Seok-Min Kang, Donghoon Choi, Hyeon-Chang Kim, Sungha Park
BACKGROUND: Although the benefit of hypertension treatment is well established in high-risk patients, there is a paucity of evidence regarding the benefit of treatment in patients with uncomplicated hypertension. METHODS: Hypertensive adult patients were selected from the Korea National Health Insurance Sample Cohort in 2002 and were followed until 2013. Patients with a diagnosis of heart failure, coronary artery disease, stroke, malignancy, diabetes, or chronic kidney disease were excluded...
May 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28343298/thiazide-increases-serum-calcium-in-anuric-patients-the-role-of-parathyroid-hormone
#3
Raquel F V Vasco, Eduardo T Reis, Rosa M A Moyses, Rosilene M Elias
We evaluated the effect of hydrochlorothiazide in a sample of anuric patients on hemodialysis and found an increase in serum calcium, which occurred only in those with parathyroid hormone >300 pg/ml. This finding highlights the extra-renal effect of this diuretic and a possible role of parathyroid hormone in the mechanism. PURPOSE: Thiazide diuretics are commonly used in patients with chronic kidney disease to treat hypertension. Their effects on calcium and bone metabolism are not well established, once calciuria may not fully explain levels of calcium and parathyroid hormone (PTH) in this population...
December 2017: Archives of Osteoporosis
https://www.readbyqxmd.com/read/28340823/evaluation-of-bone-disease-in-kidney-transplant-recipients
#4
G Alis, M Alis, T Erturk, A H Karayagiz, I Berber, U Cakir
BACKGROUND: Kidney transplant recipients are known to have bone disease, specifically osteoporosis. In this descriptive clinical study we aimed to evaluate the incidence of osteoporosis and to determine the risk factors among our transplant recipients. METHODS: A total of 109 patients (82 males and 27 females) aged from 19 to 70 years, who had undergone kidney transplantation 12 to 69 months previously, were included in the study. Bone mineral densitometry was performed using dual-energy X-ray absorptiometry...
April 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28336831/-calcilytic-drugs-feature-and-future
#5
Itsuro Endo
Calcium-sensing receptor(CaSR)is highly expressed in parathyroid, kidney, bone, and small and large intestines to regulate Ca homeostasis. Calcilytics are allosteric antagonists of CaSR, and stimulate endogenous PTH release. Several calcilytics have been evaluated as anabolic therapies for postmenopausal osteoporosis but clinical development of all of them has been abandoned because the lacked clinical efficacy. Calcilytics might be repurposed for new indications like autosomal dominant hypocalcemia or other disorders...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28336827/-pathophysiology-of-secondary-hyperparathyroidism
#6
Hiroo Kawarazaki
Secondary hyperparathyroidism(SHPT)is the result of a compensatory response of the calcium phosphate homeostatic mechanism. Vitamin D deficiency and chronic kidney disease, both representative pathophysiological causes of SHPT, have been related not only to skeletal disorders but also cardiovascular diseases, ADL and QOL. This relates the importance of SHPT as a pathological cause or marker of such states.
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28336824/-the-functions-of-calcium-sensing-receptor-in-regulating-mineral-metabolism
#7
Yuka Kinoshita
Calcium-sensing receptor(CaSR)which belongs to a G protein-coupled receptor family is one of the key elements in regulating calcium homeostasis. CaSR has been identified as a receptor to control parathyroid hormone(PTH)secretion in parathyroid glands according to serum calcium ion(Ca2+)levels. It has also been shown that CaSR controls reabsorption of water and several cations including Ca2+and magnesium ion(Mg2+)in renal tubular cells. This review summarizes the functions and roles of CaSR in mineral metabolism that are exerted in parathyroid glands, kidney, and intestine...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28336823/-regulatory-mechanism-of-calcium-metabolism
#8
Keiichi Ozono
It is often difficult for terrestrial animals to take enough calcium. To maintain serum or extracellular calcium levels is very important for muscle and nerve function. Two major regulators to increase the serum calcium levels are parathyroid hormone(PTH)and vitamin D. PTH binds to the G protein coupling receptor, PTH1R, and increases intracellular cAMP levels. Impirement in the PTH signalling causes many diseases such as pseudohypoparathyroidism and acrodysostosis with hormone resistance. Vitamin D is activated to 1,25-dihydroxyvitamin D[1,25(OH)2D]by two steps of hydroxylation which occurs in the Liver and Kidney...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28335665/calcium-oxalate-crystals-induces-tight-junction-disruption-in-distal-renal-tubular-epithelial-cells-by-activating-ros-akt-p38-mapk-signaling-pathway
#9
Lei Yu, Xiuguo Gan, Xukun Liu, Ruihua An
Tight junction plays important roles in regulating paracellular transports and maintaining cell polarity. Calcium oxalate monohydrate (COM) crystals, the major crystalline composition of kidney stones, have been demonstrated to be able to cause tight junction disruption to accelerate renal cell injury. However, the cellular signaling involved in COM crystal-induced tight junction disruption remains largely to be investigated. In the present study, we proved that COM crystals induced tight junction disruption by activating ROS/Akt/p38 MAPK pathway...
November 2017: Renal Failure
https://www.readbyqxmd.com/read/28332473/correlation-analysis-of-renal-ultrasound-elastography-and-clinical-and-pathological-changes-in-patients-with-chronic-kidney-disease%C3%A2
#10
Lingyan Peng, Tingting Zhong, Qiuling Fan, Yanjun Liu, Xuemei Wang, Lining Wang
OBJECTIVE: To analyze the correlations of renal tissue elastography with clinical biochemical indicators and pathological changes in patients with chronic kidney disease (CKD) as well as to explore the potential for renal tissue elastography as a new, noninvasive method for the dynamic monitoring of renal disease progression, efficacy assessment, and prognosis evaluation. METHODS: Patients admitted to the Department of Nephrology of the First Affiliated Hospital of China Medical University from August 2014 to January 2015 who had undergone renal biopsies were selected...
March 23, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28332126/klotho-suppresses-high-phosphate-induced-osteogenic-responses-in-human-aortic-valve-interstitial-cells-through-inhibition-of-sox9
#11
Fei Li, Qingzhou Yao, Lihua Ao, Joseph C Cleveland, Nianguo Dong, David A Fullerton, Xianzhong Meng
Elevated level of blood phosphate (Pi) associated with chronic kidney disease (CKD) is a risk factor of aortic valve calcification. Aortic valve interstitial cells (AVICs) display osteogenic responses to high Pi although the underlying mechanism is incompletely understood. Sox9 is a pro-chondrogenic factor and may play a role in ectopic tissue calcification. Circulating and kidney levels of Klotho are reduced in patients with CKD. We hypothesized that Sox9 mediates high Pi-induced osteogenic responses in human AVICs and that Klotho inhibits the responses...
March 22, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/28331214/antihypertensive-medications-and-the-risk-of-kidney-stones-in-older-adults-a-retrospective-cohort-study
#12
R Todd Alexander, Eric McArthur, Racquel Jandoc, Blayne Welk, Jade S Hayward, Arsh K Jain, Branko Braam, Veit Flockerzi, Amit X Garg, Robert Ross Quinn
Antihypertensives are widely prescribed and could influence kidney stone risk by altering urinary calcium excretion. However, the impact of different classes of antihypertensives on kidney stone risk is unknown. To assess this impact, we conducted a retrospective, population-based cohort study using linked health administrative databases. Individuals aged >65 years who initiated one of the four antihypertensive classes (that is, angiotensin-converting enzyme inhibitors (ACEis)/angiotensin receptor blockers (ARBs), beta-blockers, calcium channel blockers or thiazide diuretics) were included...
March 23, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28328954/long-term-efficacy-of-oral-calcium-polystyrene-sulfonate-for-hyperkalemia-in-ckd-patients
#13
Mi-Yeon Yu, Jee Hyun Yeo, Joon-Sung Park, Chang Hwa Lee, Gheun-Ho Kim
BACKGROUND: Calcium polystyrene sulfonate (CPS) has long been used to treat hyperkalemia in patients with chronic kidney disease (CKD). However, its efficacy and safety profile have not been systematically explored. We investigated the long-term efficacy of oral CPS for treating mild hyperkalemia on an outpatient basis. METHODS: We performed a retrospective analysis of ambulatory CKD patients who were prescribed CPS for > 1 week because of elevated serum potassium levels > 5...
2017: PloS One
https://www.readbyqxmd.com/read/28326667/the-v2-receptor-antagonist-tolvaptan-raises-cytosolic-calcium-and-prevents-aqp2-trafficking-and-function-an-in-vitro-and-in-vivo-assessment
#14
Grazia Tamma, Annarita Di Mise, Marianna Ranieri, Ari Geller, Roberto Tamma, Alberta Zallone, Giovanna Valenti
Tolvaptan, a selective vasopressin V2 receptor antagonist, is a new generation diuretic. Its clinical efficacy is in principle due to impaired vasopressin-regulated water reabsorption via aquaporin-2 (AQP2). Nevertheless, no direct in vitro evidence that tolvaptan prevents AQP2-mediated water transport, nor that this pathway is targeted in vivo in patients with syndrome of inappropriate antidiuresis (SIAD) has been provided. The effects of tolvaptan on the vasopressin-cAMP/PKA signalling cascade were investigated in MDCK cells expressing endogenous V2R and in mouse kidney...
March 21, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28324108/hypoparathyroidism-less-severe-hypocalcemia-with-treatment-with-vitamin-d2-compared-to-calcitriol
#15
Elizabeth A Streeten, Yasaman Mohtasebi, Manige Konig, Lisa Davidoff, Kathleen Ryan
Context: Options for chronic treatment of hypoparathyroidism include calcitriol, recombinant human parathyroid hormone and high dose vitamin D (D2). D2 is used in a minority because of fear of prolonged hypercalcemia and renal toxicity. There is a paucity of recent data about D2 use in hypoparathyroidism. Objective: Compare renal function, hypercalcemia and hypocalcemia in patients with hypoparathyroidism treated chronically with either D2 or calcitriol. Design, setting, patients: A retrospective study of patients with hypoparathyroidism treated at University of Maryland Hospital...
January 23, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323987/fibroblast-growth-factor-23-mineral-metabolism-and-adiposity-in-normal-kidney-function
#16
Sarah Zaheer, Ian H de Boer, Matthew Allison, Jenifer M Brown, Bruce M Psaty, Cassianne Robinson-Cohen, Erin D Michos, Joachim H Ix, Bryan Kestenbaum, David Siscovick, Anand Vaidya
Context: Obesity is associated with poor bone mineralization and quality. Fibroblast growth factor 23 (FGF23) plays an important role in calcium, phosphate, and skeletal physiology. Objective: To test the hypothesis that greater adiposity results in higher FGF23 levels among individuals with normal estimated glomerular filtration rate (eGFR). Design, Setting, Participants: Cross-sectional analyses among participants of the Multi-Ethnic Study of Atherosclerosis with eGFR ≥60 mL/min/1...
January 17, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323891/characterization-of-baff-and-april-subfamily-receptors-in-rainbow-trout-oncorhynchus-mykiss-potential-role-of-the-baff-april-axis-in-the-pathogenesis-of-proliferative-kidney-disease
#17
Aitor G Granja, Jason W Holland, Jaime Pignatelli, Christopher J Secombes, Carolina Tafalla
Proliferative kidney disease (PKD) is a parasitic infection of salmonid fish characterized by hyper-secretion of immunoglobulins in response to the presence of the myxozoan parasite, Tetracapsuloides bryosalmonae. In this context, we hypothesized that the BAFF/APRIL axis, known to play a major role in B cell differentiation and survival in mammals, could be affected by the parasite and consequently be involved in the apparent shift in normal B cell activity. To regulate B cell activity, BAFF and APRIL bind to transmembrane activator and calcium modulator and cyclophilin ligand interactor (TACI) and B cell maturation antigen (BCMA), whereas BAFF also binds to BAFF receptor (BAFF-R)...
2017: PloS One
https://www.readbyqxmd.com/read/28321001/comparative-effects-of-an-angiotensin-ii-receptor-blocker-arb-diuretic-vs-arb-calcium-channel-blocker-combination-on-uncontrolled-nocturnal-hypertension-evaluated-by-information-and-communication-technology-based-nocturnal-home-blood-pressure-monitoring%C3%A3-the
#18
Kazuomi Kario, Naoko Tomitani, Hiroshi Kanegae, Hajime Ishii, Kazuaki Uchiyama, Kayo Yamagiwa, Toshihiko Shiraiwa, Tomohiro Katsuya, Tetsuro Yoshida, Kiyomi Kanda, Shinji Hasegawa, Satoshi Hoshide
BACKGROUND: Nocturnal blood pressure (BP) is an independent risk factor of cardiovascular events. The NOCTURNE study, a multicenter, randomized controlled trial (RCT) using our recently developed information and communication technology (ICT) nocturnal home BP monitoring (HBPM) device, was performed to compare the nocturnal HBP-lowering effects of differential ARB-based combination therapies in 411 Japanese patients with nocturnal hypertension (HT).Methods and Results:Patients with nocturnal BP ≥120/70 mmHg at baseline even under ARB therapy (100 mg irbesartan daily) were enrolled...
March 17, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28320755/ciliary-mechanisms-of-cyst-formation-in-polycystic-kidney-disease
#19
Ming Ma, Anna-Rachel Gallagher, Stefan Somlo
Autosomal-dominant polycystic kidney disease (ADPKD) is a disease of defective tissue homeostasis resulting in active remodeling of nephrons and bile ducts to form fluid-filled sacs called cysts. The causal genes PKD1 and PKD2 encode transmembrane proteins polycystin 1 (PC1) and polycystin 2 (PC2), respectively. Together, the polycystins localize to the solitary primary cilium that protrudes from the apical surface of most kidney tubule cells and is thought to function as a privileged compartment that the cell uses for signal integration of sensory inputs...
March 20, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28318623/the-complexity-of-chronic-kidney-disease-mineral-and-bone-disorder-across-stages-of-chronic-kidney%C3%A2-disease
#20
Fabiana G Graciolli, Katia R Neves, Fellype Barreto, Daniela V Barreto, Luciene M Dos Reis, Maria E Canziani, Yves Sabbagh, Aluizio B Carvalho, Vanda Jorgetti, Rosilene M Elias, Susan Schiavi, Rosa M A Moysés
Chronic Kidney Disease (CKD)-Mineral and Bone Disorder (CKD-MBD) is a complex disease that is not completely understood. However, some factors secreted by the osteocytes might play an important role in its pathophysiology. Therefore, we evaluated the bone expression of proteins in a group of patients with CKD 2-3, CKD 4, and CKD 5 on dialysis and healthy individuals. We also tested several bone remodeling markers, and correlated these levels with bone biopsy findings. As expected, as serum calcium decreased, serum phosphate, alkaline phosphatase, fibroblast growth factor-23 (FGF-23), parathyroid hormone, and osteoprotegerin increased, as CKD progressed...
March 15, 2017: Kidney International
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