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Adipose tissue vitamin D

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https://www.readbyqxmd.com/read/27916865/associations-of-vitamin-d-with-inter-and-intra-muscular-adipose-tissue-and-insulin-resistance-in-women-with-and-without-polycystic-ovary-syndrome
#1
David Scott, Anju Joham, Helena Teede, Melanie Gibson-Helm, Cheryce Harrison, Samantha Cassar, Samantha Hutchison, Peter R Ebeling, Nigel Stepto, Barbora de Courten
Low vitamin D and insulin resistance are common in polycystic ovary syndrome (PCOS) and associated with higher inter- and intra-muscular adipose tissue (IMAT). We investigated associations between vitamin D, IMAT and insulin resistance in a cross-sectional study of 40 women with PCOS and 30 women without PCOS, and pre- and post-exercise in a 12-week intervention in 16 overweight participants (10 with PCOS and six without PCOS). A non-classical body mass index (BMI) threshold was used to differentiate lean and overweight women (BMI ≥ 27 kg/m²)...
November 30, 2016: Nutrients
https://www.readbyqxmd.com/read/27871812/effects-of-roux-en-y-gastric-bypass-and-sleeve-gastrectomy-on-bone-mineral-density-and-marrow-adipose-tissue
#2
Miriam A Bredella, Logan B Greenblatt, Alireza Eajazi, Martin Torriani, Elaine W Yu
Bariatric surgery is associated with bone loss but skeletal consequences may differ between Roux-en-Y gastric bypass (RYGB) and sleeve gastrectomy (SG), the two most commonly performed bariatric procedures. Furthermore, severe weight loss is associated with high marrow adipose tissue (MAT); however, MAT is also increased in visceral adiposity. The purpose of our study was to determine the effects of RYGB and SG on BMD and MAT. We hypothesized that both bariatric procedures would lead to a decrease in BMD and MAT...
November 15, 2016: Bone
https://www.readbyqxmd.com/read/27754361/plasma-25-hydroxyvitamin-d-is-related-to-protein-signaling-involved-in-glucose-homeostasis-in-a-tissue-specific-manner
#3
Lewan Parker, Itamar Levinger, Aya Mousa, Kirsten Howlett, Barbora de Courten
Vitamin D has been suggested to play a role in glucose metabolism. However, previous findings are contradictory and mechanistic pathways remain unclear. We examined the relationship between plasma 25-hydroxyvitamin D (25(OH)D), insulin sensitivity, and insulin signaling in skeletal muscle and adipose tissue. Seventeen healthy adults (Body mass index: 26 ± 4; Age: 30 ± 12 years) underwent a hyperinsulinemic-euglycemic clamp, and resting skeletal muscle and adipose tissue biopsies. In this cohort, the plasma 25(OH)D concentration was not associated with insulin sensitivity (r = 0...
October 13, 2016: Nutrients
https://www.readbyqxmd.com/read/27703587/an-updated-mini-review-of-vitamin-d-and-obesity-adipogenesis-and-inflammation-state
#4
Zujaja-Tul-Noor Hamid Mehmood, Dimitrios Papandreou
Vitamin D related research continues to expand and theorise regarding its involvement in obesity, as both hypovitaminosis D and obesity strike in pandemic proportions. Vitamin D plays an important role in immune system through Vitamin D Receptors (VDR), which are transcription factors located abundantly in the body. Due to this characteristic, it is potentially linked to obesity, which is a state of inflammation involving the release of cytokines from adipose tissue, and exerting stress on other organs in a state of positive energy balance...
September 15, 2016: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/27677370/aging-low-grade-systemic-inflammation-and-vitamin-d-a-mini-review
#5
C M R Gonçalves de Carvalho, S M L Ribeiro
We conducted a mini-review of the literature, focusing on aging-related systemic inflammation and its association with vitamin D (VitD). As main findings, data indicate that inflammation in aging seems to have multiple origins, including immunosenescence, and from intestinal and adipose tissue, where VitD may modulate these three factors, through mechanisms not totally known. From the selected studies, three randomized clinical trials of VitD supplementation showed improvements in inflammatory status, whereas two studies did not...
September 28, 2016: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27660858/hypovitaminosis-d-and-adipose-tissue-cause-and-effect-relationships-in-obesity
#6
Marta Pelczyńska, Teresa Grzelak, Marcelina Walczak, Krystyna Czyżewska
In recent years, attention has been focused on pleiotropic directions of effects exerted by vitamin D. Epidemiological data indicate that deficiency of vitamin D in various population groups represents an increasingly widespread phenomenon, while a decreased serum concentration of calcitriol correlates with manifestation of civilization-linked diseases, including visceral obesity. This study aims at a review and synthesis of data linked to relationships between lowered vitamin D concentrations in blood and manifestation of obesity, and potential mechanisms which affect the concentration of the vitamin in conditions of an excessive accumulation of adipose tissue...
September 2016: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/27553017/vitamin-d-not-just-the-bone-evidence-for-beneficial-pleiotropic-extraskeletal-effects
#7
Massimiliano Caprio, Marco Infante, Matilde Calanchini, Caterina Mammi, Andrea Fabbri
Vitamin D is a fat-soluble vitamin and a steroid hormone that plays a central role in maintaining calcium-phosphorus and bone homeostasis in close interaction with parathyroid hormone, acting on its classical target tissues, namely, bone, kidney, intestine, and parathyroid glands. However, vitamin D endocrine system regulates several genes (about 3 % of the human genome) involved in cell differentiation, cell-cycle control, and cell function and exerts noncalcemic/pleiotropic effects on extraskeletal target tissues, such as immune and cardiovascular system, pancreatic endocrine cells, muscle, and adipose tissue...
August 23, 2016: Eating and Weight Disorders: EWD
https://www.readbyqxmd.com/read/27544370/vitamin-d-toxicity-stored-and-released-from-adipose-tissue
#8
Hossein Ziaie, Sara Razmjou, Rohollah Jomhouri, Arya Jenabi
Vitamin D is a pro-hormone that plays an important role in body calcium regulation. Vitamin D toxicity occurs rarely due to its wide therapeutic index. A 38-year-old Iranian man was admitted to our hospital with a diagnosis of vitamin D toxicity. Laboratory test revealed hypercalcemia and elevated 25-hydroxyvitamin D (25(OH)D) level. Despite the cessation of vitamin D intake and diuretic treatment, he presented four months later with high 25(OH)D level and similar clinical features. Due to the potential release of vitamin D from adipose tissue, serial monitoring of 25(OH)D level is recommended...
August 2016: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/27542960/vitamin-d-storage-in-adipose-tissue-of-obese-and-normal-weight-women
#9
Angela Carrelli, Mariana Bucovsky, Ronald Horst, Serge Cremers, Chengchen Zhang, Marc Bessler, Beth Schrope, John Evanko, Jody Blanco, Shonni J Silverberg, Emily M Stein
While vitamin D deficiency is prevalent among obese individuals, its cause is poorly understood. Few studies have measured vitamin D concentrations in adipose of obese (OB) subjects, and none have included normal weight controls (C). The goal of this study was to investigate whether the relationship between body composition, serum 25-hydroxyvitamin D (25OHD), vitamin D in subcutaneous (SQ) and omental (OM) adipose and total adipose stores of vitamin D differ among OB and C. Obese women undergoing bariatric surgery and normal weight women undergoing abdominal surgery for benign gynecologic conditions were enrolled...
August 20, 2016: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/27537278/changes-in-circulating-vitamin-d-levels-with-loss-of-adipose-tissue
#10
Anne Gangloff, Jean Bergeron, Isabelle Lemieux, Jean-Pierre Després
PURPOSE OF REVIEW: Low vitamin D levels have been extensively reported in obesity. Thus, the pandemic of obesity has been paralleled by a high prevalence of low vitamin D status. Given the well documented associations linking poor vitamin D status to adverse health outcomes (diabetes, cardiovascular disease, cancers, all-cause mortality), a proper understanding of the mechanisms linking excess adiposity to low vitamin D status is key to identify and implement effective interventions to replenish vitamin D levels in obese individuals...
November 2016: Current Opinion in Clinical Nutrition and Metabolic Care
https://www.readbyqxmd.com/read/27534819/vitamin-a-supplementation-transiently-increases-retinol-concentrations-in-extrahepatic-organs-of-neonatal-rats-raised-under-vitamin-a-marginal-conditions
#11
Joanna K Hodges, Libo Tan, Michael H Green, A Catharine Ross
BACKGROUND: Vitamin A (VA; retinol) supplementation is recommended for children aged >6 mo in countries with high rates of malnutrition, but the distribution and retention of VA in body tissues have not been extensively explored. OBJECTIVE: We sought to determine the distribution and retention of VA in tissues of neonatal rats raised under VA-marginal conditions. METHODS: Sprague-Dawley neonatal rats (n = 104; 63 males) nursed by mothers fed a VA-marginal diet (0...
October 2016: Journal of Nutrition
https://www.readbyqxmd.com/read/27530414/vitamin-d-machinery-and-metabolism-in-porcine-adipose-derived-mesenchymal-stem-cells
#12
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
#13
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/27504197/effect-of-exercise-on-serum-vitamin-d-and-tissue-vitamin-d-receptors-in-experimentally-induced-type-2-diabetes-mellitus
#14
Yosria E Aly, Azza S Abdou, Mona M Rashad, Menatallah M Nassef
This work aimed to study the effect of swimming exercise on serum vitamin D level and tissue vitamin D receptors in experimentally induced type 2 Diabetes Mellitus. Sixty adult male rats were divided into control and diabetic groups. Each was further subdivided into sedentary and exercised subgroups. Diabetes Mellitus was induced by a single intraperitoneal dose of streptozotocin (50 mg/kg) dissolved in cold 0.01 M citrate buffer (pH 4.5). The exercised subgroups underwent swimming for 60 min, 5 times a week for 4 weeks...
September 2016: Journal of Advanced Research
https://www.readbyqxmd.com/read/27437780/evaluation-of-the-relation-between-vitamin-d-and-serum-omentin-and-vaspin-levels-in-women
#15
M Zorlu, M Kiskac, M Cakirca, C Karatoprak, E M Güler, K Çelik, I Gültepe, M A Cikrikcioglu, A Kocyigit
INTRODUCTION: Vitamin D deficiency is a common health problem seen worldwide. Adipokines released from adipose tissue play important roles in the control of appetite and satiety, modulation of body fat distribution, regulation of insulin sensitivity and secretion, control of blood pressure, and regulation of endothelial functions and inflammation. The aim of the present study is to investigate how vitamin D levels affect serum vaspin and omentin levels. MATERIALS AND METHODS: This is a cross-sectional study design...
July 2016: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/27385762/tissue-concentrations-of-vitamin-k-and-expression-of-key-enzymes-of-vitamin-k-metabolism-are-influenced-by-sex-and-diet-but-not-housing-in-c57bl6-mice
#16
Stephanie G Harshman, Xueyan Fu, J Philip Karl, Kathryn Barger, Stefania Lamon-Fava, Athan Kuliopulos, Andrew S Greenberg, Donald Smith, Xiaohua Shen, Sarah L Booth
BACKGROUND: There has been limited characterization of biological variables that impact vitamin K metabolism. This gap in knowledge can limit the translation of data obtained from preclinical animal studies to future human studies. OBJECTIVE: The purpose of this study was to determine the effects of diet, sex, and housing on serum, tissue, and fecal vitamin K concentrations and gene expression in C57BL6 mice during dietary vitamin K manipulation. METHODS: C57BL6 4-mo-old male and female mice were randomly assigned to conventional or suspended-wire cages and fed control [1400 ± 80 μg phylloquinone (PK)/kg] or deficient (31 ± 0...
August 2016: Journal of Nutrition
https://www.readbyqxmd.com/read/27374117/vitamin-d-controls-resistance-artery-function-through-regulation-of-perivascular-adipose-tissue-hypoxia-and-inflammation
#17
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/27358421/vitamin-d-receptor-gene-polymorphisms-are-associated-with-abdominal-visceral-adipose-tissue-volume-and-serum-adipokine-concentrations-but-not-with-body-mass-index-or-waist-circumference-in-african-americans-the-jackson-heart-study
#18
Rumana J Khan, Pia Riestra, Samson Y Gebreab, James G Wilson, Amadou Gaye, Ruihua Xu, Sharon K Davis
BACKGROUND: The biological actions of vitamin D are mediated through the vitamin D receptor (VDR). Single-nucleotide polymorphisms (SNPs) in the VDR gene have been previously associated with adiposity traits. However, to our knowledge, few studies have included direct measures of adiposity and adipokine concentrations. OBJECTIVE: We examined the association of tagging SNPs in the VDR gene with multiple adiposity measures, including waist circumference (WC), body mass index (BMI), body fat percentage, subcutaneous and visceral adipose tissue (VAT) volume, and serum adipokine (adiponectin and leptin) concentrations in adult African Americans (AAs)...
August 2016: Journal of Nutrition
https://www.readbyqxmd.com/read/27325245/calcium-reduces-vitamin-d-and-glucocorticoid-receptors-in-the-visceral-fat-of-obese-male-rats
#19
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/27307256/vitamin-d-status-in-young-swedish-women-with-anorexia-nervosa-during-intensive-weight-gain-therapy
#20
Anna Svedlund, Cecilia Pettersson, Bojan Tubic, Per Magnusson, Diana Swolin-Eide
PURPOSE: Anorexia nervosa (AN) is associated with reduced bone mass and an increased fracture risk. The aim was to evaluate the vitamin D status and the association with body mass index (BMI), fat mass and bone mineral density (BMD) in patients with severe AN during a prospective intervention study of intensive nutrition therapy. METHODS: This study comprised 25 Swedish female AN patients (20.1 ± 2.3 years), who were treated as inpatients for 12 weeks with a high-energy diet...
June 15, 2016: European Journal of Nutrition
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