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1,25-dihydroxyvitamin d

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https://www.readbyqxmd.com/read/27936456/1%C3%AE-25-dihydroxyvitamin-d-inhibits-de-novo-fatty-acid-synthesis-and-lipid-accumulation-in-metastatic-breast-cancer-cells-through-down-regulation-of-pyruvate-carboxylase
#1
Tomasz Wilmanski, Kimberly Buhman, Shawn S Donkin, John R Burgess, Dorothy Teegarden
Both increased de novo fatty acid synthesis and higher neutral lipid accumulation are a common phenotype observed in aggressive breast cancer cells, making lipid metabolism a promising target for breast cancer prevention. In the present studies, we demonstrate a novel effect of the active metabolite of vitamin D, 1α,25-dihydroxyvitamin D (1,25(OH)₂D) on lipid metabolism in malignant breast epithelial cells. Treatment of MCF10CA1a breast epithelial cells with 1,25(OH)₂D (10 nM) for 5 and 7 days decreased the level of triacylglycerol, the most abundant form of neutral lipids, by 20%(±3...
December 1, 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/27932304/vitamin-d-and-type-2-diabetes
#2
REVIEW
Paul Lips, Marelise Eekhoff, Natasja Vzn Schoor, Mirjam Oosterwerff, Renate de Jongh, Yvonne Krul-Poel, Suat Simsek
Vitamin D deficiency is associated with a decreased insulin release, insulin resistance and type 2 diabetes in experimental and epidemiological studies. Animal studies show that 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3) stimulates the pancreatic β-cell to secrete insulin. The relationship between vitamin D deficiency and insulin resistance could develop through inflammation, as vitamin D deficiency is associated with increased inflammatory markers. In addition, genetic polymorphisms of vitamin D -related genes may predispose to impaired glycemic control and type 2 diabetes...
December 5, 2016: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27927781/genetic-variants-associated-with-circulating-parathyroid-hormone
#3
Cassianne Robinson-Cohen, Pamela L Lutsey, Marcus E Kleber, Carrie M Nielson, Braxton D Mitchell, Joshua C Bis, Karen M Eny, Laura Portas, Joel Eriksson, Mattias Lorentzon, Daniel L Koller, Yuri Milaneschi, Alexander Teumer, Stefan Pilz, Maria Nethander, Elizabeth Selvin, Weihong Tang, Lu-Chen Weng, Hoi Suen Wong, Dongbing Lai, Munro Peacock, Anke Hannemann, Uwe Völker, Georg Homuth, Matthias Nauk, Federico Murgia, Jack W Pattee, Eric Orwoll, Joseph M Zmuda, Jose Antonio Riancho, Myles Wolf, Frances Williams, Brenda Penninx, Michael J Econs, Kathleen A Ryan, Claes Ohlsson, Andrew D Paterson, Bruce M Psaty, David S Siscovick, Jerome I Rotter, Mario Pirastu, Elizabeth Streeten, Winfried März, Caroline Fox, Josef Coresh, Henri Wallaschofski, James S Pankow, Ian H de Boer, Bryan Kestenbaum
Parathyroid hormone (PTH) is a primary calcium regulatory hormone. Elevated serum PTH concentrations in primary and secondary hyperparathyroidism have been associated with bone disease, hypertension, and in some studies, cardiovascular mortality. Genetic causes of variation in circulating PTH concentrations are incompletely understood. We performed a genome-wide association study of serum PTH concentrations among 29,155 participants of European ancestry from 13 cohort studies (n=22,653 and n=6502 in discovery and replication analyses, respectively)...
December 7, 2016: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/27919949/1%C3%AE-dihydroxyvitamin-d3-and-retinoic-acid-increase-nuclear-vitamin-d-receptor-expression-in-monocytic-thp-1-cells
#4
Hikaru Uchida, Yuichiro Hasegawa, Hiromichi Takahashi, Makoto Makishima
BACKGROUND: 1α,25-Dihydroxyvitamin D3 [1,25(OH)2D3] and retinoic acid, such as all-trans retinoic acid (ATRA) and 9-cis retinoic acid (9cRA), are known to induce differentiation of myeloid leukemia cells. Combined treatment effectively enhances the differentiation effect, particularly in monocytic leukemia cells. The underlying mechanism of this combined effect remains unknown. MATERIALS AND METHODS: THP-1 monocytic leukemia cells were treated with 1,25(OH)2D3 in combination with 9cRA, ATRA or selective synthetic ligand for retinoic acid receptor (RAR) or retinoid X receptor (RXR), and the nuclear expression and function of vitamin D receptor (VDR) were examined...
December 2016: Anticancer Research
https://www.readbyqxmd.com/read/27919940/vitamin-d-and-myofibroblasts-in-fibrosis-and-cancer-at-cross-purposes-with-tgf-%C3%AE-smad-signaling
#5
REVIEW
Shraga Shany, Ina Sigal-Batikoff, Sergio Lamprecht
The multifaceted involvement of the active vitamin D metabolite 1,25-dihydroxyvitamin D3 (henceforth referred to by the synonyms 1,25(OH)2D3, calcitriol or vitamin D) in blunting the growth of cancer cells is amply recognized. In this review we focused our attention on the cross-talk between 1,25 (OH)2D3 and the tumor microenvironment (TME), signaling out stromal cancer-associated fibroblasts (CAFs), the most abundant TME population, as a target for calcitriol anticancer action. In view of the commonality of the phenotypic signature in myofibroblasts, resident in the cancer stroma and in non-neoplastic fibrotic loci, we examined modes of action of vitamin D in non-neoplastic chronic diseases and in cancer to assess mechanistic similarities and divergences...
December 2016: Anticancer Research
https://www.readbyqxmd.com/read/27915991/control-of-inflammatory-bowel-disease-and-colorectal-cancer-by-synthetic-vitamin-d-receptor-ligands
#6
Ichiro Takada, Makoto Makishima
Vitamin D deficiency and insufficiency are associated with an increased risk of cancer, autoimmune disease, inflammation, infection, cardiovascular disease and metabolic disease, as well as bone and mineral disorders. The vitamin D receptor (VDR), a member of the nuclear receptor superfamily, is a receptor for the active form of vitamin D, 1α,25-dihydroxyvitamin D3 [1,25(OH)2D3], and mediates vitamin D regulation of specific target gene expression. The secondary bile acid lithocholic acid, which is produced by intestinal bacteria, is another natural VDR ligand...
December 2, 2016: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/27913273/the-endocrine-vitamin-d-system-in-the-gut
#7
Antonio Barbáchano, Asunción Fernández-Barral, Gemma Ferrer-Mayorga, Alba Costales-Carrera, María Jesús Larriba, Alberto Muñoz
The active vitamin D metabolite 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3) has important regulatory actions in the gut through endocrine and probably also intracrine, autocrine and paracrine mechanisms. By activating the vitamin D receptor (VDR), which is expressed at a high level in the small intestine and colon, 1,25(OH)2D3 regulates numerous genes that control gut physiology and homeostasis. 1,25(OH)2D3 is a major responsible for epithelial barrier function and calcium and phosphate absorption, and the host's defense against pathogens and the inflammatory response by several types of secretory and immune cells...
November 29, 2016: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/27902586/neurological-psychological-and-cognitive-disorders-in-patients-with-chronic-kidney-disease-on-conservative-and-replacement-therapy
#8
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/27890450/src2-3-binds-to-vitamin-d-receptor-with-high-sensitivity-and-strong-affinity
#9
Daichi Egawa, Toshimasa Itoh, Akira Kato, Saori Kataoka, Yasuaki Anami, Keiko Yamamoto
Vitamin D receptor (VDR) is a member of the nuclear receptor superfamily and regulates the expression of target genes through ligand binding. To express the target gene, coactivator binding to the VDR/ligand complex is essential. Although there are many coactivators in living cells, precise interactions between coactivators and VDR have not been clarified. Here, we synthesized two coactivator peptides, DRIP205-2 and SRC2-3, evaluated their affinity for the ligand-binding domain (LBD) of VDR using 1α,25-dihydroxyvitamin D3, partial agonist 1, and antagonist 2 by surface plasmon resonance (SPR), and assessed their interaction modes with VDR-LBD using X-ray crystallographic analysis...
November 14, 2016: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/27886405/hypercalcemia-in-necrobiotic-xanthogranuloma-first-reported-case-and-insight-into-treatment
#10
Jad G Sfeir, Richard J Zogala, Violeta B Popii
Necrobiotic Xanthogranuloma (NXG) is a rare systemic and progressive granulomatous disease first described in 1980. Given no established first-line therapy, treatment focuses on the control of skin lesions and associated complications. Despite it being a granulomatous disease, NXG has not been associated with hypercalcemia. About 140 cases of NXG have been reported to-date but, to our knowledge, this is the first case to be complicated by hypercalcemia. Our case confirms a granulomatous disease mediated production of 1α-hydroxylase leading to increased synthesis of 1,25-dihydroxyvitamin D and subsequent hypercalcemia...
November 25, 2016: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/27876536/the-protective-effect-of-1alpha-25-dihydroxyvitamin-d3-and-metformin-on-liver-in-type-2-diabetic-rats
#11
REVIEW
Samah Elattar, Suzanne Estaphan, Enas A Mohamed, Ahmed Elzainy, Mary Naguib
There is an accumulating evidence suggesting an immunomodulatory role of 1α,25(OH)2D3. Altered 1α,25(OH)2D3 level may play a role in the development of T2DM and contribute to the pathogenesis of liver diseases. Our study was designed to study and compare the effect of metformin and 1α,25(OH)2D3 supplementation on liver injury in type 2 diabetic rat. Sixty male Albino rats were divided into 5 groups; group 1: control rats. the remaining rats were fed high fat diet for 2 weeks and injected with streptozotocin (35mg/kg BW, i...
November 19, 2016: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27865354/vitamin-d-supplementation-reduces-insulin-resistance-in-japanese-adults-a-secondary-analysis-of-a-double-blind-randomized-placebo-controlled-trial
#12
Xiaomin Sun, Zhen-Bo Cao, Kumpei Tanisawa, Tomoko Ito, Satomi Oshima, Mitsuru Higuchi
Higher circulating 25-hydroxyvitamin D (25[OH]D) concentration has been linked to a lower prevalence of insulin resistance and type 2 diabetes mellitus. However, randomized controlled trials have not clarified the effect of vitamin D supplementation on insulin resistance in healthy adults. The objective of this study was to assess the effect of vitamin D supplementation for 1 year on insulin resistance; the study was a secondary analysis of a clinical trial. We hypothesized that increased 25(OH)D concentration after vitamin D supplementation for 1 year would significantly improve insulin resistance...
October 2016: Nutrition Research
https://www.readbyqxmd.com/read/27862146/maternal-25-hydroxyvitamin-d-is-inversely-correlated-with-fetal-serotonin
#13
Padma Murthi, Miranda Davies-Tuck, Martha Lappas, Harmeet Singh, Joanne Mockler, Rahana Rahman, Rebecca Lim, Bryan Leaw, James Doery, Euan M Wallace, Peter R Ebeling
OBJECTIVE: Maternal vitamin D deficiency during pregnancy has been linked to impaired neurocognitive development in childhood. The mechanism by which vitamin D affects childhood neurocognition is unclear but may be via interactions with serotonin, a neurotransmitter involved in fetal brain development. In this study we aimed to explore associations between maternal and fetal vitamin D concentrations, and fetal serotonin concentrations at term. STUDY DESIGN AND MEASUREMENTS: Serum 25-hydroxyitamin D (25(OH)D, nmol/L) and serotonin (5-HT, nmol/L) concentrations were measured in maternal and umbilical cord blood from mother-infant pairs (n=64)...
November 12, 2016: Clinical Endocrinology
https://www.readbyqxmd.com/read/27830022/transplantation-of-bone-marrow-derived-mesenchymal-stem-cells-rescues-partially-rachitic-phenotypes-induced-by-1-25-dihydroxyvitamin-d-deficiency-in-mice
#14
Zengli Zhang, Shaomeng Yin, Xian Xue, Ji Ji, Jian Tong, David Goltzman, Dengshun Miao
To determine whether the transplantation of bone marrow-derived mesenchymal stem cells (BM-MSCs) can improve the 1,25(OH)2D deficiency-induced rachitic phenotype, 2×10(6) BM-MSCs from wild-type mice or vehicle were transplanted by tail vein injection into mice deficient in 1,25(OH)2D due to targeted deletion of 1α(OH)ase (1α(OH)ase(-/-)). Our results show that 1α(OH)ase mRNA was expressed in the BM-MSCs derived from wild-type mice, and was detected in long bone, kidney and intestine from BM-MSC-transplanted 1α(OH)ase(-/-) recipients...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27826881/bone-fractures-with-sodium-glucose-co-transporter-2-inhibitors-how-real-is-the-risk
#15
REVIEW
Edoardo Mannucci, Matteo Monami
This article succinctly summarizes the available evidence on the risk of bone fractures with sodium-glucose co-transporter-2 inhibitors. The US Food and Drug Administration has strengthened the warning for canagliflozin related to the increased risk of bone fractures, and added new information about decreased bone mineral density. The agency has also said that it will evaluate the risk of bone fractures with other drugs in the sodium-glucose co-transporter-2 inhibitor class. Increases in parathyroid hormone levels and decreases in 1,25-dihydroxyvitamin D levels have been postulated as possible mechanisms...
November 8, 2016: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/27813709/serum-1-25-dihydroxyvitamin-d-as-a-biomarker-of-the-absence-of-hypercalciuria-in-postsurgical-hypoparathyroidism
#16
Luis García-Pascual, María José Barahona, Verónica Perea, Rafael Simó
CONTEXT: Hypercalciuria is an adverse event of postsurgical hypoparathyroidism treatment which can lead to renal complications. The collection of 24-hour urine to detect hypercalciuria is often considered unreliable. OBJECTIVE: To find useful predictive biomarkers of hypercalciuria in patients with permanent postsurgical hypoparathyroidism under treatment with oral calcium and calcitriol supplements. DESIGN: Prospective cross-sectional study...
November 4, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27803671/cross-talk-between-the-calcium-sensing-receptor-and-the-vitamin-d-system-in-prevention-of-cancer
#17
REVIEW
Abhishek Aggarwal, Enikö Kállay
There is epidemiological evidence for the cancer preventive effect of dietary calcium (Ca(2+)) and vitamin D. This effect is strongest in colorectal cancer (CRC). The active vitamin D metabolite, 1,25-dihydroxyvitamin D3 (1,25D3), bound to its receptor, the vitamin D receptor (VDR) regulates the expression of hundreds of different genes in a cell- and tissue-specific manner. While Ca(2+) acts through multiple mechanisms and pathways, some of its effects are mediated by the calcium-sensing receptor (CaSR). The joint action of Ca(2+) and 1,25D3 is due to the fact that both regulate some of the main processes involved in the development of various cancers, such as proliferation, differentiation, apoptosis, migration, and inflammation...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27798933/a-pediatric-patient-with-a-cyp24a1-mutation-four-years-of-clinical-biochemical-and-imaging-follow-up
#18
Diana-Alexandra Ertl, Adalbert Raimann, Dagmar Csaicsich, Janina M Patsch, Franco Laccone, Gabriele Haeusler
BACKGROUND: A female infant was admitted to hospital due to failure to thrive. She presented hypercalcemia (4.09 mmol/L, normal range: 2.2-2.65 mmol/L), high 25-hydroxyvitamin D (283 nmol/L, normal range: 75-250 nmol/L), 1,25-dihydroxyvitamin D in the upper normal range, and low parathyroid hormone. Vitamin D intoxication was suspected. The patient had received routine rickets prophylaxis. METHODS: Williams-Beuren syndrome was genetically excluded. Sequencing of CYP24A1 showed 2 mutations: c...
November 1, 2016: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/27788150/calciotropic-and-phosphaturic-hormones-in-end-stage-heart-failure-patients-supported-by-a-left-ventricular-assist-device
#19
Armin Zittermann, Jana B Ernst, Stefan Pilz, Jens Dreier, Joachim Kuhn, Cornelius Knabbe, Jan F Gummert, Michiel Morshuis, Hendrik Milting
BACKGROUND: Calcium and phosphate are central for myocardial contractility and energy metabolism, and low levels of the calciotropic hormone 1,25-dihydroxyvitamin D (1,25(OH)2D), as well as high levels of the phosphaturic hormone fibroblast growth factor (FGF)-23, are independently associated with poor clinical outcome in heart failure (HF) patients. We therefore aimed to investigate the postoperative time course of the aforementioned hormones in HF patients supported with a left-ventricular assist device (LVAD) implant...
2016: PloS One
https://www.readbyqxmd.com/read/27775655/effects-of-proton-pump-inhibitor-administration-and-intake-of-a-combination-of-yogurt-and-galactooligosaccharides-on-bone-and-mineral-metabolism-in-rats
#20
Satoshi Takasugi, Miho Shioyama, Masami Kitade, Masashi Nagata, Taketo Yamaji
The aim of this study was to investigate the effects of proton pump inhibitor (PPI), the most potent acid-suppressing drug, administration and intake of a combination of yogurt and galactooligosaccharides (YG) on bone and mineral metabolism in adult rats. Twelve-week-old male Wistar rats were divided into three groups: a control group fed the control diet with vehicle administration, a PPI group fed the control diet with PPI administration and a YG + PPI group fed the YG diet with PPI administration. All of the groups received their respective experimental diets and daily subcutaneous injection of the vehicle or PPI for 12 weeks...
October 21, 2016: Nutrients
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