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https://www.readbyqxmd.com/read/29903718/calcitriol-accelerates-vascular-calcification-irrespective-of-vitamin-k-status-in-a-rat-model-of-ckd-with-hyperphosphatemia-and-secondary-hyperparathyroidism
#1
Kristin M McCabe, Jason G Zelt, Martin Kaufmann, Kimberly Laverty, Emilie Ward, Henry Barron, Glenville Jones, Michael A Adams, Rachel M Holden
Patients with chronic kidney disease have a markedly increased risk for developing cardiovascular disease. Non-traditional risk factors, such as increased phosphate retention, and deficiencies in vitamins D and K metabolism, likely play key roles in the development of vascular calcification during CKD progression. Calcitriol (1,25-(OH)2-D3) is a key transcriptional regulator of Matrix Gla protein (MGP), a vitamin K dependent protein that inhibits vascular calcification. The objective of this study was to determine if calcitriol treatment could inhibit the development of vascular calcification and if this inhibition was dependent on vitamin K status in a rat model of CKD...
June 14, 2018: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/29776409/calcitriol-downregulates-fibroblast-growth-factor-receptor-1-through-histone-deacetylase-activation-in-hl-1-atrial-myocytes
#2
Ting-Wei Lee, Ting-I Lee, Yung-Kuo Lin, Yu-Hsun Kao, Yi-Jen Chen
BACKGROUND: Fibroblast growth factor (FGF)-2 plays a crucial role in the pathophysiology of cardiovascular diseases (CVDs). FGF-2 was reported to induce cardiac hypertrophy through activation of FGF receptor 1 (FGFR1). Multiple laboratory findings indicate that calcitriol may be a potential treatment for CVDs. In this study, we attempted to investigate whether calcitriol regulates FGFR1 expression to modulate the effects of FGF-2 signaling in cardiac myocytes and explored the potential regulatory mechanism...
May 18, 2018: Journal of Biomedical Science
https://www.readbyqxmd.com/read/29754168/acromegaly-is-associated-with-high-fibroblast-growth-factor-21-levels
#3
B S Yurekli, N O Kutbay, M Aksit, A Suner, I Y Simsir, S Seckiner, G U Kocabas, G Bozkaya, F Saygili
PURPOSE: Fibroblast growth factor-21 (FGF-21) is a member of fibroblast growth factor family. Both growth hormone (GH) and FGF-21 take place in the regulation of glucose and lipid metabolism. We aimed to investigate FGF-21 levels in acromegaly which is characterized by excess GH levels and is associated with comorbidities and altered body composition. METHODS: We studied 43 subjects (21 females and 22 males, mean age of 50.0 ± 12.8) with acromegaly. The control group consisted of 40 gender- and age-matched subjects (25 females and 15 males, mean age of 48...
May 12, 2018: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29754009/dietary-nitrogen-and-calcium-modulate-cyp27b1-expression-in-young-goats
#4
M R Wilkens, K Elfers, M Schmicke, G Breves, A S Muscher-Banse
In livestock, feeding a reduced nitrogen (N) diet is favored for economic and ecological reasons. Ruminants cope more easily with a reduced N diet than monogastric species. However, changes in mineral homeostasis such as a reduction in 1,25-dihydroxyvitamin D3 (1,25-(OH)2 D3 ) concentrations, calcium (Ca), and IGF1 levels were observed in goats kept on a reduced N diet. The decrease in 1,25-(OH)2 D3 occurred even during a simultaneous reduction in dietary N and Ca, whereas a solitary Ca reduction stimulated 1,25-(OH)2 D3 synthesis...
April 3, 2018: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/29751971/cardiac-hypertrophy-elevates-serum-levels-of-fibroblast-growth-factor-23
#5
Isao Matsui, Tatsufumi Oka, Yasuo Kusunoki, Daisuke Mori, Nobuhiro Hashimoto, Ayumi Matsumoto, Karin Shimada, Satoshi Yamaguchi, Keiichi Kubota, Sayoko Yonemoto, Tomoaki Higo, Yusuke Sakaguchi, Yoshitsugu Takabatake, Takayuki Hamano, Yoshitaka Isaka
Several experimental studies have shown that fibroblast growth factor 23 (FGF23) induces left ventricular hypertrophy (LVH). However, the opposite directional relationship, namely a potential effect of LVH on FGF23, remains uncertain. Here we evaluated the effects of LVH on FGF23 using cardiomyocyte-specific calcineurin A transgenic mice. At six weeks, these mice showed severe LVH, with elevated levels of serum intact FGF23. FGF23 levels were elevated in cardiomyocytes, but not osteocytes, of the transgenic animals...
May 8, 2018: Kidney International
https://www.readbyqxmd.com/read/29734515/decreased-placental-and-muscular-expression-of-the-fibroblast-growth-factor-19-in-gestational-diabetes-mellitus
#6
Dongyu Wang, Shuqia Xu, Wenjing Ding, Caixia Zhu, Songqing Deng, Xiwen Qiu, Zilian Wang
AIMS: Fibroblast growth factor (FGF) 19 has been shown to improve glycaemic homeostasis and lipid metabolism in animal models. In humans, decreased FGF19 level has been described in diabetes. This study aimed to investigate the expression of FGF19 in gestational diabetes mellitus (GDM). MATERIALS AND METHODS: Samples for measurement were obtained from 20 GDM women and 25 healthy controls. The mRNA and protein expression levels of FGF19, FGF21 and co-receptor β-klotho (KLB) in placenta, rectus muscle and subcutaneous fat tissues were quantified by real-time quantitative polymerase chain reaction, western-blot and immunohistochemistry, respectively...
May 7, 2018: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/29726397/under-recognized-hypoparathyroidism-in-thalassemia
#7
Hataitip Tangngam, Pat Mahachoklertwattana, Preamrudee Poomthavorn, Ampaiwan Chuansumrit, Nongnuch Sirachainan, La-or Chailurkit, Patcharin Khlairit
OBJECTIVE: Symptomatic hypoparathyroidism [symptomatic hypocalcemia without elevated serum parathyroid hormone (PTH)] in patients with thalassemia is relatively rare. Asymptomatic mild hypocalcemia without elevated PTH which is considered hypoparathyroidism may be more common but under-recognized. METHODS: Sixty-six transfusion-dependent thalassemic patients, and 28 healthy controls were enrolled. Serum calcium (Ca), phosphate (P), creatinine (Cr), albumin, intact PTH, 25-hydroxyvitamin D (25-OHD), plasma intact fibroblast growth factor-23 (FGF-23), urine Ca, P and Cr were measured...
May 4, 2018: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/29720668/central-role-of-the-proximal-tubular-%C3%AE-klotho-fgf-receptor-complex-in-fgf23-regulated-phosphate-and-vitamin-d-metabolism
#8
Ai Takeshita, Kazuki Kawakami, Kenryo Furushima, Masayasu Miyajima, Kazushige Sakaguchi
Fibroblast growth factor 23 (FGF23) plays critical roles in phosphate handling and vitamin D metabolism in the kidney. However, the effector cells of FGF23 in the kidney remain unclear. αKlotho, a putative enzyme possessing β-glucuronidase activity and also a permissive co-receptor for FGF23 to bind to FGF receptors (FGFRs), is expressed most abundantly in distal convoluted tubules, whereas it is expressed modestly in proximal tubules. Key molecular players of phosphate homeostasis and vitamin D-metabolizing enzymes are known to localize in proximal tubules...
May 2, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29710336/association-of-fibroblast-growth-factor-23-with-recurrent-cardiovascular-events-in-patients-after-an-acute-coronary-syndrome-a-secondary-analysis-of-a-randomized-clinical-trial
#9
Brian A Bergmark, Jacob A Udell, David A Morrow, Christopher P Cannon, Dylan L Steen, Petr Jarolim, Andrzej Budaj, Christian Hamm, Jianping Guo, KyungAh Im, Julia F Kuder, Eugene Braunwald, Marc S Sabatine, Michelle L O'Donoghue
Importance: Elevated fibroblast growth factor 23 (FGF-23) concentrations are associated with myocardial fibrosis and renin-angiotensin system upregulation, potentially providing prognostic information distinct from standard cardiovascular (CV) biomarkers. Objective: To evaluate the association of FGF-23 with recurrent CV events in patients after an acute coronary syndrome (ACS). Design, Setting, and Participants: C-terminal FGF-23 was measured in plasma samples using an established enzyme-linked immunosorbent assay system for 4947 patients within 30 days of ACS (median, 14 days) and with 1 additional CV risk factor in the Stabilization of Plaques Using Darapladib-Thrombolysis in Myocardial Infarction 52 (SOLID-TIMI 52) trial of the lipoprotein-associated phospholipase A2 inhibitor darapladib vs placebo performed from December 1, 2009, to April 24, 2014 (median follow-up, 2...
April 18, 2018: JAMA Cardiology
https://www.readbyqxmd.com/read/29708879/fibroblast-growth-factor-23-and-renal-function-among-young-and-healthy-individuals
#10
Raffaele Bernasconi, Stefanie Aeschbacher, Steffen Blum, Michel Mongiat, Marc Girod, John Todd, Joel Estis, Niamh Nolan, Harald Renz, Lorenz Risch, David Conen, Martin Risch
BACKGROUND: Fibroblast growth factor 23 (FGF-23), an osteocyte hormone involved in the regulation of phosphate metabolism, is associated with incident and progressive chronic kidney disease. We aimed to assess the association of FGF-23 with renal parameters, vascular function and phosphate metabolism in a large cohort of young and healthy individuals. METHODS: Healthy individuals aged 25-41 years were included in a prospective population-based study. Fasting venous blood and morning urinary samples were used to measure plasma creatinine, cystatin C, endothelin-1, phosphate and plasma FGF-23 as well as urinary creatinine and phosphate...
May 1, 2018: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/29704936/associations-between-single-nucleotide-polymorphisms-in-the-calcium-sensing-receptor-and-chronic-kidney-disease-mineral-and-bone-disorder-in-cats
#11
R F Geddes, R E Jepson, Y Forcada, J Elliott, H M Syme
Feline chronic kidney disease (CKD) is associated with high variability in severity of CKD-mineral and bone disorder (CKD-MBD). The calcium sensing receptor (CaSR) regulates circulating parathyroid hormone (PTH) and calcium concentrations. Single nucleotide polymorphisms (SNPs) in the CaSR are associated with severity of secondary renal hyperparathyroidism and total calcium concentrations in human patients receiving haemodialysis. The objective of this study was to explore associations between polymorphisms in the feline CaSR (fCaSR) and biochemical changes observed in CKD-MBD...
May 2018: Veterinary Journal
https://www.readbyqxmd.com/read/29672176/prevalence-and-risk-factors-for-vascular-calcification-in-chinese-patients-receiving-dialysis-baseline-results-from-a-prospective-cohort-study
#12
Zhi-Hong Liu, Xue-Qing Yu, Jun-Wei Yang, Ai-Li Jiang, Bi-Cheng Liu, Chang-Ying Xing, Ji-Zhuang Lou, Mei Wang, Hong Cheng, Jun Liu, Jun-Zhou Fu, Ai-Hua Zhang, Miao Zhang, Qiao-Ling Zhou, Chen Yu, Rong Wang, Li Wang, Yu-Qing Chen, Tian-Jun Guan, Ai Peng, Nan Chen, Chuan-Ming Hao, Xu-Yang Cheng
OBJECTIVE: With limited data available on calcification prevalence in chronic kidney disease (CKD) patients on dialysis, the China Dialysis Calcification Study (CDCS) determined the prevalence of vascular/valvular calcification (VC) and association of risk factors in Chinese patients with prevalent hemodialysis (HD) or peritoneal dialysis (PD). METHODS: CKD patients undergoing HD/PD for ≥6 months were enrolled. Prevalence data for calcification and medical history were documented at baseline...
May 3, 2018: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/29671909/should-phosphate-management-be-limited-to-the-kdigo-kdoqi-guidelines
#13
Sangeet Dhillon-Jhattu, Stuart M Sprague
Hyperphosphatemia is a common complication of CKD. Prior to development of overt hyperphosphatemia, there are several adaptive mechanisms that occur to maintain normal phosphorus equilibrium in patients with CKD. These include an early and progressive rise in fibroblast growth factor 23 (FGF 23), followed by an increase in parathyroid hormone (PTH) with a decrease in 1,25-dihydroxyvitamin D (1,25 Vit D). Over the last 20 years, a large number of studies have shown that hyperphosphatemia is a strong predictor of adverse clinical outcomes including increased incidence of vascular calcification, cardiovascular disease, and all-cause mortality in both individuals with CKD as well as those with normal kidney function...
April 19, 2018: Seminars in Dialysis
https://www.readbyqxmd.com/read/29665846/correlation-of-serum-levels-of-fibroblast-growth-factor-23-and-klotho-protein-levels-with-bone-mineral-density-in-maintenance-hemodialysis-patients
#14
Shubei Zheng, Yan Chen, Yu Zheng, Zhihong Zhou, Zhanyuan Li
OBJECTIVE: The correlation of serum fibroblast growth factor 23 (FGF-23) and Klotho protein levels with bone mineral density (BMD) in maintenance hemodialysis (MHD) patients was analyzed. METHODS: Between January 2015 and November 2015, 125 MHD patients in our hospital were enrolled. Dual-energy X-ray absorptiometry was used to examine the BMD in the femoral neck and lumbar spine of MHD patients. The patients were divided into three groups: a normal bone mass group, an osteopenia group, and an osteoporosis group...
April 17, 2018: European Journal of Medical Research
https://www.readbyqxmd.com/read/29660161/the-fgf-23-klotho-axis-and-its-relationship-with-phosphorus-calcium-vitamin-d-pth-aldosterone-severity-of-disease-and-outcome-in-hospitalised-foals
#15
A M Kamr, K A Dembek, B E Hildreth, P R Morresey, R A Rathgeber, T A Burns, A A Zaghawa, R E Toribio
BACKGROUND: Fibroblast growth factor-23 (FGF-23) and klotho are key regulators of vitamin D and parathyroid hormone (PTH) synthesis as well as phosphorus and calcium homeostasis; however, information on the FGF-23/klotho axis in healthy and hospitalised foals is lacking. OBJECTIVES: The aims of this study were to measure serum FGF-23 and klotho concentrations and determine their association with serum phosphorus, total calcium (TCa), vitamin D metabolite [25(OH)D, 1,25(OH)2 D], PTH, and aldosterone concentrations, disease severity, and mortality in hospitalised foals...
April 16, 2018: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29625077/optimising-the-collection-of-female-genital-tract-fluid-for-cytokine-analysis-in-pregnant-women
#16
C S Short, R Quinlan, P Bennett, R J Shattock, G P Taylor
INTRODUCTION: To better understand the immunology of pregnancy, study of female genital tract fluid (FGF) is desirable. However the optimum method of collection of FGF in pregnant women for immunological methods, specifically cytokine measurement, is unknown. METHODS: A prospective study of HIV-uninfected pregnant women comparing two methods of FGF collection: polyvinyl acetal sponge collection of cervical fluid (CF) and menstrual cup collection of cervicovaginal fluid (CVF)...
July 2018: Journal of Immunological Methods
https://www.readbyqxmd.com/read/29621752/fibroblast-growth-factor-23-a-biomarker-of-kidney-function-decline
#17
David A Drew, Ronit Katz, Stephen Kritchevsky, Joachim H Ix, Michael G Shlipak, Anne B Newman, Andy Hoofnagle, Linda Fried, Mark J Sarnak, Orlando M Gutierrez
BACKGROUND: Fibroblast growth factor 23 (FGF-23) is a hormone that regulates phosphorus levels and vitamin D metabolism. Previous studies have shown FGF-23 to be a risk factor for incident end-stage renal disease; however, there are less data on the association of FGF-23 with earlier kidney-related outcomes. METHODS: Serum FGF-23 was assayed using an intact ELISA assay in 2,496 participants of the Healthy Aging and Body Composition Study, a cohort of well-functioning older adults...
2018: American Journal of Nephrology
https://www.readbyqxmd.com/read/29599772/the-gut-microbiota-regulates-endocrine-vitamin-d-metabolism-through-fibroblast-growth-factor-23
#18
Stephanie A Bora, Mary J Kennett, Philip B Smith, Andrew D Patterson, Margherita T Cantorna
To determine the effect of the microbiota on vitamin D metabolism, serum 25-hydroxyvitamin D(25D), 24,25-dihydroxyvitamin D (24,25D), and 1,25-dihydroxyvitamin D (1,25D) were measured in germ-free (GF) mice before and after conventionalization (CN). GF mice had low levels of 25D, 24,25D, and 1,25D and were hypocalcemic. CN of the GF mice with microbiota, for 2 weeks recovered 25D, 24,25D, and 1,25D levels. Females had more 25D and 24,25D than males both as GF mice and after CN. Introducing a limited number of commensals (eight commensals) increased 25D and 24,25D to the same extent as CN...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29574933/the-association-of-serum-fgf23-and-non-alcoholic-fatty-liver-disease-is-independent-of-vitamin-d-in-type-2-diabetes-patients
#19
Xingxing He, Yun Shen, Xiaojing Ma, Lingwen Ying, Jiahui Peng, Xiaoping Pan, Yuqian Bao, Jian Zhou
Recent studies have shown that circulating fibroblast growth factor (FGF) 23 and vitamin D levels are closely correlated with insulin resistance. The aim of this study was to investigate the relationship among serum FGF 23 levels, serum 25-hydroxyvitamin D [25(OH)D] levels, and non-alcoholic fatty liver disease (NAFLD) in Chinese patients with type 2 diabetes mellitus (T2DM). This study enrolled 331 hospitalized T2DM patients (209 patients with NAFLD and 122 patients without NAFLD). Serum FGF23 levels were measured using a sandwich enzyme-linked immunosorbent assay...
March 25, 2018: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29549243/effects-of-supplemented-isoenergetic-diets-varying-in-cereal-fiber-and-protein-content-on-the-bile-acid-metabolic-signature-and-relation-to-insulin-resistance
#20
Martin O Weickert, John G Hattersley, Ioannis Kyrou, Ayman M Arafat, Natalia Rudovich, Michael Roden, Peter Nowotny, Christian von Loeffelholz, Silke Matysik, Gerd Schmitz, Andreas F H Pfeiffer
Bile acids (BA) are potent metabolic regulators influenced by diet. We studied effects of isoenergetic increases in the dietary protein and cereal-fiber contents on circulating BA and insulin resistance (IR) in overweight and obese adults. Randomized controlled nutritional intervention (18 weeks) in 72 non-diabetic participants (overweight/obese: 29/43) with at least one further metabolic risk factor. Participants were group-matched and allocated to four isoenergetic supplemented diets: control; high cereal fiber (HCF); high-protein (HP); or moderately increased cereal fiber and protein (MIX)...
March 7, 2018: Nutrition & Diabetes
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