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Vitamin d adipocyte

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https://www.readbyqxmd.com/read/28353634/vitamin-d-insufficiency-exacerbates-adipose-tissue-macrophage-infiltration-and-decreases-ampk-sirt1-activity-in-obese-rats
#1
Eugene Chang, Yangha Kim
Obesity is recognized as a state of chronic low-grade systemic inflammation due to adipose tissue macrophage infiltration and production of proinflammatory adipokines. Decreased vitamin D status is associated with obesity. The specific aim of the present study is to investigate the effects of vitamin D on obesity-induced adipose tissue inflammation. Male Sprague-Dawley rats were randomized and fed a normal diet (NOR, 1000 IU vitamin D/kg diet), a 45% high-fat diet (HF, 1000 IU vitamin D/kg diet), or a 45% high-fat diet containing 25 IU vitamin D/kg diet (HF+LVD) for 12 weeks...
March 29, 2017: Nutrients
https://www.readbyqxmd.com/read/28229265/low-vitamin-d-status-and-obesity-role-of-nutritionist
#2
REVIEW
Silvia Savastano, Luigi Barrea, Maria Cristina Savanelli, Francesca Nappi, Carolina Di Somma, Francesco Orio, Annamaria Colao
Low vitamin D status and obesity have concomitantly reached epidemic levels worldwide. Up to now the direction of the association between low vitamin D status and obesity, the exact mechanisms responsible for this association and the clinical usefulness to increase vitamin D status for reducing adiposity still warrant further evaluation. The aim of the present review was to examine the current evidence linking low vitamin D status and obesity in relation to the role of the nutritionist. On the one side, considering obesity as a causal factor, low sun exposure in obese individuals due to their sedentary lifestyle and less outdoor activity, vitamin D sequestration in adipose tissue, and volumetric dilution of ingested or cutaneously synthesized vitamin D3 in the large fat mass of obese patients, might represent some of the factors playing a major role in the pathogenesis of the low vitamin D status...
February 23, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28100914/tet-mediated-hydroxymethylcytosine-at-the-ppar%C3%AE-locus-is-required-for-initiation-of-adipogenic-differentiation
#3
Y Yoo, J H Park, C Weigel, D B Liesenfeld, D Weichenhan, C Plass, D-G Seo, A M Lindroth, Y J Park
BACKGROUND/OBJECTIVES: Adipose tissue is one of the main organs regulating energy homeostasis via energy storage as well as endocrine function. The adipocyte cell number is largely determined by adipogenesis. While the molecular mechanism of adipogenesis has been extensively studied, its role in dynamic DNA methylation plasticity remains unclear. Recently, it has been shown that Tet methylcytosine dioxygenase (TET) is catalytically capable of oxidizing DNA 5-methylcytosine (5-mC) to 5-hydroxymethylcytosine (5-hmC) toward a complete removal of the methylated cytosine...
April 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28091892/bariatric-roux-en-y-gastric-bypass-surgery-adipocyte-proteins-involved-in-increased-bone-remodeling-in-humans
#4
Maria Fernanda G Biagioni, Adriana L Mendes, Célia Regina Nogueira, Celso V Leite, Loraine Gollino, Gláucia Mfs Mazeto
PURPOSE: Bariatric surgery has been associated with bone remodeling changes. The action of adipokines on the expression of receptor activator of nuclear factor kappa β ligand (RANKL) and osteoprotegerin (OPG) and on an increase in sclerostin could be related to these changes. MATERIALS AND METHODS: This study aimed to assess the repercussions of weight loss, fat mass (FM), and fat-free mass (FFM) loss and biochemical and hormonal changes on bone remodeling markers after Roux-en-Y gastric bypass (RYGB)...
January 13, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28063949/vitamin-d-supplementation-inhibits-oxidative-stress-and-upregulate-sirt1-ampk-glut4-cascade-in-high-glucose-treated-3t3l1-adipocytes-and-in-adipose-tissue-of-high-fat-diet-fed-diabetic-mice
#5
Prasenjit Manna, Arunkumar E Achari, Sushil K Jain
This study examined the hypothesis that vitamin-D prevents oxidative stress and upregulates glucose metabolism via activating insulin-independent signaling molecules in 3T3-L1 adipocytes and in high fat diet (HFD)-fed mice. To investigate the mechanism 3T3L1 adipocytes were treated with high glucose (HG, 25 mM) and 1,25(OH)2D3 (1,25-dihydroxyvitamin D3) (0-50 nM). Results showed that 1,25(OH)2D3 supplementation decreased NOX4 expression, ROS production, NF-κB phosphorylation, and increased the expression of Nrf2 and Trx in HG-treated cells...
February 1, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28055298/vitamin-d-limits-inflammation-linked-microrna-expression-in-adipocytes-in-vitro-and-in-vivo-a-new-mechanism-for-the-regulation-of-inflammation-by-vitamin-d
#6
Esma Karkeni, Lauriane Bonnet, Julie Marcotorchino, Franck Tourniaire, Julien Astier, Jianping Ye, Jean-François Landrier
Inflammation of adipose tissue is believed to be a contributing factor to many chronic diseases associated with obesity. Vitamin D (VD) is now known to limit this metabolic inflammation by decreasing inflammatory marker expression and leukocyte infiltration in adipose tissue. In this study, we investigated the impact of VD on microRNA (miR) expression in inflammatory conditions in human and mouse adipocytes, using high-throughput methodology (miRNA PCR arrays). Firstly, we identified three miRs (miR-146a, miR-150, and miR-155) positively regulated by TNFα in human adipocytes...
January 5, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/28004271/maternal-vitamin-d-deficiency-during-pregnancy-affects-expression-of-adipogenic-regulating-genes-peroxisome-proliferator-activated-receptor-gamma-ppar%C3%AE-and-vitamin-d-receptor-vdr-in-lean-male-mice-offspring
#7
Anthony M Belenchia, Karen L Jones, Matthew Will, David Q Beversdorf, Victoria Vieira-Potter, Cheryl S Rosenfeld, Catherine A Peterson
PURPOSE: Maternal vitamin D deficiency during pregnancy is a widespread issue that may have long-lasting consequences on offspring adiposity. We sought to determine how maternal vitamin D deficiency during the perinatal period would affect offspring adipose tissue development and gene expression. METHODS: Female C57BL/6 J mice were fed either a vitamin D deficient (VDD) or control diet from 4 weeks before pregnancy (periconception) until 7 days postparturition...
December 21, 2016: European Journal of Nutrition
https://www.readbyqxmd.com/read/27904547/the-effect-of-vitamin-d-administration-on-serum-leptin-and-adiponectin-levels-in-end-stage-renal-disease-patients-on-hemodialysis-with-vitamin-d-deficiency-a-placebo-controlled-double-blind-clinical-trial
#8
Afsoon Emami Naini, Sahar Vahdat, Zahra Parin Hedaiati, Safoura Shahzeidi, Amir Hossein Pezeshki, Hamid Nasri
BACKGROUND: The prevalence of vitamin D deficiency is higher in end-stage renal disease (ESRD) patients compared to healthy populations. This deficiency could lead to several complications with different mechanisms and might result in reduced survival in patients. Leptin and adiponectin are messenger proteins with endocrine secretion from adipocytes and various effects in cellular mechanisms. The goal of this study was to find the effect of vitamin D administration on serum levels of leptin and adiponectin in ESRD patients...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27876139/conversations-between-insulin-and-bone-potential-mechanism-of-high-bone-density-in-patients-with-berardinelli-seip-congenital-lipodystrophy
#9
Josivan Gomes Lima, Natalia Nobrega Lima, Lucia Helena C Nobrega, Selma Maria B Jeronimo
Berardinelli-Seip Congenital Lipodystrophy (BSCL) is a rare autosomal recessive syndrome characterized by a difficulty storing lipid in adipocytes, low body fat, hypertriglyceridemia, and fat liver. The serum leptin is usually very low, and serum insulin, as well as HOMAIR (homeostasis model assessment), is very high and correlated positively with bone mineral density (BMD). Despite deficiency/insufficiency of vitamin D, low body mass index, low daily calcium intake, physical inactivity, and menarche at a later age, BSCL patients usually have normal or even high BMD...
December 2016: Medical Hypotheses
https://www.readbyqxmd.com/read/27530414/vitamin-d-machinery-and-metabolism-in-porcine-adipose-derived-mesenchymal-stem-cells
#10
Yovani Llamas Valle, Sami G Almalki, Devendra K Agrawal
BACKGROUND: Vitamin D, a hormone once thought to have a role limited to calcium homeostasis and bone mineralization, has pleiotropic effects on different types of cells. Vitamin D receptors are reported in vascular smooth muscle cells, endothelial cells, and cardiomyocytes. Adipose-derived MSCs (ADMSCs) are multipotent cells with the capacity to differentiate into cells of different lineages. To our knowledge, the presence of vitamin D machinery on porcine ADMSCs has not yet been examined...
August 17, 2016: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/27520301/physiological-functions-of-vitamin-d-in-adipose-tissue
#11
REVIEW
Manal A Abbas
Adipose tissue has long been identified as the major site of vitamin D storage. Recent studies have demonstrated that VDR and vitamin D metabolizing enzymes are expressed in adipocytes. Furthermore, it has been shown that vitamin D regulates adipogenic gene expression as well as adipocyte apoptosis. Vitamin D is active in adipocytes at all levels. It interacts with membrane receptors, adaptor molecules, and nuclear coregulator proteins. Several functions of unliganded nVDR were discovered by studying human samples from patients having hereditary vitamin D resistant rickets, transgenic mice overexpressing the VDR and VDR knockout mice...
January 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27374117/vitamin-d-controls-resistance-artery-function-through-regulation-of-perivascular-adipose-tissue-hypoxia-and-inflammation
#12
Christopher J Pelham, Elizabeth M Drews, Devendra K Agrawal
Vitamin D deficiency in human subjects is associated with hypertension, metabolic syndrome and related risk factors of cardiovascular diseases. Serum 25-hydroxyvitamin D levels correlate inversely with adiposity in obese and lean individuals. Bioactive vitamin D, or calcitriol, exerts anti-inflammatory effects on adipocytes, preadipocytes and macrophages in vitro. We tested the hypothesis that vitamin D deficiency alters the phenotype of perivascular adipose tissue (PVAT) leading to impaired function in resistance artery...
September 2016: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/27325245/calcium-reduces-vitamin-d-and-glucocorticoid-receptors-in-the-visceral-fat-of-obese-male-rats
#13
E P S Conceição, E G Moura, A C Manhães, J C Carvalho, J L Nobre, E Oliveira, P C Lisboa
Rats overfed during lactation show higher visceral adipose tissue (VAT) mass and metabolic dysfunctions at adulthood. As both vitamin D and glucocorticoids change adipogenesis, parameters related to metabolism and action of these hormones in the adipocyte can be altered in rats raised in small litters (SL). We also studied the antiobesity effects of high calcium diet since it decreases visceral fat in obesity models. On postnatal day (PN) 3, litter size was adjusted to 3pups/dam (SL) to induce overfeeding. Control litters (NL) remained with 10pups/dam until weaning...
August 2016: Journal of Endocrinology
https://www.readbyqxmd.com/read/27312893/effect-of-cadmium-on-bone-tissue-in-growing-animals
#14
Juliana Rodríguez, Patricia Mónica Mandalunis
Accumulation of cadmium (Cd), an extremely toxic metal, can cause renal failure, decreased vitamin D synthesis, and consequently osteoporosis. The aim of this work was to evaluate the effect of Cd on two types of bone in growing Wistar rats. Sixteen 21-day-old male Wistar rats were assigned to one of two groups. The Cd group subcutaneously received 0.5mg/kg of CdCl2 5 times weekly for 3 months. The control group similarly received bidistilled water. Following euthanasia, the mandibles and tibiae were resected, fixed, decalcified and processed histologically to obtain sections for H&E and tartrate-resistant acid phosphatase (TRAP) staining...
August 2016: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
https://www.readbyqxmd.com/read/27225042/modulation-of-t-cell-activation-in-obesity
#15
Stéphanie O Morin, Marjorie Poggi, Marie-Christine Alessi, Jean-François Landrier, Jacques A Nunès
SIGNIFICANCE: Immune T cells are present in adipose tissues (AT), and the stoichiometry of the different T cell subsets is altered during diet-induced obesity (DIO). T cells contribute to the early steps of AT inflammation during DIO. Recent Advances: Many factors could potentially be responsible for this altered pro-inflammatory versus anti-inflammatory T cell balance. CRITICAL ISSUES: T cells are potentially activated in AT, which vitamin D might contribute to, as will be discussed in this article...
April 1, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/26899162/vitamin-d-decreases-adipocyte-lipid-storage-and-increases-nad-sirt1-pathway-in-3t3-l1-adipocytes
#16
Eugene Chang, Yangha Kim
OBJECTIVE: Previous studies suggest that low vitamin D status is associated with obesity characterized by excess lipid storage in adipocytes. The aim of the present study was to determine the effects of the most hormonally active form of vitamin D 1,25-dihydroxyvitamin D [1,25(OH)2D] on adipocyte fat storage and lipid metabolism in mature 3T3-L1 cells. METHODS: Differentiated 3T3-L1 cells were treated with various concentrations of 1,25(OH)2D. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide cell proliferation, intracellular lipid content, and basal and isoproterenol-stimulated lipolysis were measured to investigate the regulatory role of 1,25(OH)2D in adipocyte lipid metabolism...
June 2016: Nutrition
https://www.readbyqxmd.com/read/26778336/role-of-vitamin-d-in-adipose-tissue-in-obese-rats-programmed-by-early-weaning-and-post-diet-calcium
#17
Jessica Lopes Nobre, Patricia C Lisboa, Nayara Peixoto-Silva, Fernanda Torres Quitete, Janaine C Carvalho, Egberto Gaspar de Moura, Elaine de Oliveira
SCOPE: Early weaning (EW) is associated with an impairment of offspring development and leads to overweight and higher 25-hydroxyvitamin D (25(OH)D) levels in adulthood, which can be corrected by calcium supplementation, potentially via vitamin D regulation of adipogenesis. METHODS AND RESULTS: We examined vitamin D status in adipose tissue in EW obese rats, treated with calcium. Dams were separated into: EW- dams were wrapped with a bandage to interrupt lactation (last 3 days), and C- pups with free access to milk...
April 2016: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/26592177/vitamin-d-cellular-ca-2-link-to-obesity-and-diabetes
#18
REVIEW
Igor N Sergeev
The vitamin D hormone 1,25-Dihydroxyvitamin D3 (1,25(OH)2D3)-induced cellular Ca(2+) signals regulate apoptosis in adipocytes and insulin secretion from pancreatic β-cells, and low vitamin D status is considered a risk factor for obesity and type 2 diabetes. The anti-obesity effects of 1,25(OH)2D3 in mature adipocytes are determined by its activity to generate, via multiple Ca(2+) signaling pathways, a sustained increase in intracellular Ca(2+) followed by activation of the Ca(2+)-dependent initiators and effectors of apoptosis...
November 2016: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/26522682/vitamin-d-deficiency-impairs-glucose-stimulated-insulin-secretion-and-increases-insulin-resistance-by-reducing-ppar-%C3%AE-expression-in-nonobese-type-2-diabetic-rats
#19
Sunmin Park, Da Sol Kim, Suna Kang
Human studies have provided relatively strong associations of poor vitamin D status with Type 2 diabetes but do not explain the nature of the association. Here, we explored the physiological pathways that may explain how vitamin D status modulates energy, lipid and glucose metabolisms in nonobese Type 2 diabetic rats. Goto-Kakizaki (GK) rats were fed high-fat diets containing 25 (VD-low), 1000 (VD-normal) or 10,000 (VD-high) cholecalciferol-IU/kg diet for 8 weeks. Energy expenditure, insulin resistance, insulin secretory capacity and lipid metabolism were measured...
January 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/26074086/nuclear-actions-of-insulin-like-growth-factor-binding-protein-3
#20
REVIEW
Robert C Baxter
In addition to its actions outside the cell, cellular uptake and nuclear import of insulin-like growth factor binding protein-3 (IGFBP-3) has been recognized for almost two decades, but knowledge of its nuclear actions has been slow to emerge. IGFBP-3 has a functional nuclear localization signal and interacts with the nuclear transport protein importin-β. Within the nucleus IGFBP-3 appears to have a role in transcriptional regulation. It can bind to the nuclear receptor, retinoid X receptor-α and several of its dimerization partners, including retinoic acid receptor, vitamin D receptor (VDR), and peroxisome proliferator-activated receptor-γ (PPARγ)...
September 10, 2015: Gene
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