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Fat mass associated gene

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https://www.readbyqxmd.com/read/28088658/exposure-to-chronic-early-life-stress-lastingly-alters-the-adipose-tissue-the-leptin-system-and-changes-the-vulnerability-to-western-style-diet-later-in-life-in-mice
#1
K Y Yam, E F G Naninck, M R Abbink, S E la Fleur, L Schipper, J C van den Beukel, A Grefhorst, A Oosting, E M van der Beek, P J Lucassen, A Korosi
Early-life stress (ES) increases the vulnerability to develop psychopathologies and cognitive decline in adulthood. Interestingly, this is often comorbid with metabolic disorders, such as obesity. However, it is unclear whether ES leads to lasting metabolic changes and to what extent this is associated with the ES-induced cognitive impairments. Here, we used an established chronic ES mouse model (from postnatal day (P) 2 to P9) to investigate the short- and long-term effects of ES exposure on parameters of the adipose tissue and the leptin system (i...
December 23, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28074253/c-abl-inhibition-mitigates-diet-induced-obesity-through-improving-insulin-sensitivity-of-subcutaneous-fat-in-mice
#2
Rong Wu, Jian-Guang Sun, Ji-Qiu Wang, Binhua Li, Qingsong Liu, Guang Ning, Wanzhu Jin, Zengqiang Yuan
AIMS/HYPOTHESIS: High-energy diets are among the main causes of the global epidemic of metabolic disorders, including obesity and type 2 diabetes. The mechanisms of high-energy-diet-induced metabolic disorders are complex and largely unknown. The non-receptor tyrosine kinase c-Abl plays an important role in adipogenesis in vitro but its role in vivo in the regulation of metabolism is still elusive. Hence, we sought to address the role of c-Abl in diet-induced obesity and obesity-associated insulin resistance...
January 10, 2017: Diabetologia
https://www.readbyqxmd.com/read/28065722/peripheral-endocannabinoid-signaling-controls-hyperphagia-in-western-diet-induced-obesity
#3
Donovan A Argueta, Nicholas V DiPatrizio
The endocannabinoid system in the brain and periphery plays a major role in controlling food intake and energy balance. We reported that tasting dietary fats was met with increased levels of the endocannabinoids, 2-arachidonoyl-sn-glycerol (2-AG) and anandamide, in the rat upper small intestine, and pharmacological inhibition of this local signaling event dose-dependently blocked sham feeding of fats. We now investigated the contribution of peripheral endocannabinoid signaling in hyperphagia associated with chronic consumption of a western-style diet in mice ([WD] i...
January 5, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28064282/high-carbohydrate-low-fat-diet-induced-gender-specific-serum-lipid-profile-changes-are-associated-with-lepr-polymorphisms-in-chinese-youth
#4
Hui Tang, Zhen Zhang, ZhengKe Li, Jia Lin, Ding Zhi Fang
BACKGROUND/AIMS: The study aimed to investigate the interactions of genetic variants in the leptin receptor (LEPR) gene with lipid profile changes following a high-carbohydrate/low-fat (HC/LF) diet in a Chinese Han population. METHODS: Fifty-six healthy young subjects were given washout diets, followed by HC/LF diets consisting of 15% fat and 70% carbohydrate for 6 days. Serum lipid profiles and insulin levels before and after HC/LF diets were analyzed. RESULTS: Statistically elevated high-density lipoprotein cholesterol (HDL-C), apolipoprotein A-1 (apoA-I), and insulin levels were only observed in the GG genotype of LEPR Lys109Arg but not in the A carriers after HC/LF diet...
January 7, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28064279/the-rs1862513-variant-in-resistin-gene-modified-insulin-resistance-and-insulin-levels-after-weight-loss-secondary-to-hypocaloric-diet
#5
Daniel Antonio de Luis, Olatz Izaola, David Primo, Beatriz de la Fuente, Ines Mulero, Rocío Aller
BACKGROUND/AIMS: Polymorphisms of a single nucleotide in RETN have been associated with indexes of insulin resistance. Our aim was to analyze the effects of the rs1862513 RETN gene polymorphism on insulin resistance, insulin levels, and resistin levels changes after 3 months of a low-fat hypocaloric diet. DESIGN: A Caucasian population of 133 obese patients was analyzed before and after 3 months on a low-fat hypocaloric diet. RESULTS: Fifty-six patients (42...
January 7, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28061324/oral-corticosterone-administration-reduces-insulitis-but-promotes-insulin-resistance-and-hyperglycemia-in-male-nonobese-diabetic-mice
#6
Susan J Burke, Heidi M Batdorf, Adrianna E Eder, Michael D Karlstad, David H Burk, Robert C Noland, Z Elizabeth Floyd, J Jason Collier
Steroid-induced diabetes is the most common form of drug-induced hyperglycemia. Therefore, metabolic and immunological alterations associated with chronic oral corticosterone were investigated using male nonobese diabetic mice. Three weeks after corticosterone delivery, there was reduced sensitivity to insulin action measured by insulin tolerance test. Body composition measurements revealed increased fat mass and decreased lean mass. Overt hyperglycemia (>250 mg/dL) manifested 6 weeks after the start of glucocorticoid administration, whereas 100% of the mice receiving the vehicle control remained normoglycemic...
January 4, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28028632/the-rs3736228-polymorphism-in-the-lrp5-gene-is-associated-with-calcaneal-ultrasound-parameter-but-not-with-body-composition-in-a-cohort-of-young-caucasian-adults
#7
María Correa-Rodríguez, Jacqueline Schmidt-RioValle, Blanca Rueda-Medina
The aim of the present study was to investigate the possible influence of low-density lipoprotein receptor-related protein 5 (LRP5) and sclerostin (SOST) genes as genetic factors contributing to calcaneal quantitative ultrasound (QUS) and body composition variables in a population of young Caucasian adults. The study population comprised a total of 575 individuals (mean age 20.41years; SD 2.36) whose bone mass was assessed through QUS to determine broadband ultrasound attenuation (BUA, dB/MHz). Body composition measurements were performed using a body composition analyser...
December 27, 2016: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/28009527/reg2-expression-is-required-for-pancreatic-islet-compensation-in-response-to-aging-and-high-fat-diet-induced-obesity
#8
Qing Li, Bing Li, Xiaoliang Miao, Christopher Ramgattie, Zu-Hua Gao, Jun-Li Liu
Maintaining pancreatic β-cell mass and function is essential for normal insulin production and glucose homeostasis. Regenerating islet-derived 2 (Reg2, Reg II, human orthologue Reg1B) gene is normally expressed in pancreatic acinar cells and significantly induced in responses to diabetes, pancreatitis, high-fat diet and during pancreatic regeneration. In order to evaluate the role of endogenous Reg2 production in normal β-cell function, we characterized Reg2 gene deficient mice normally and when subjected to several pathological challenges...
December 23, 2016: Endocrinology
https://www.readbyqxmd.com/read/28005939/muscle-arnt-hif1%C3%AE-is-dispensable-in-myofiber-type-determination-vascularization-and-insulin-sensitivity
#9
Pierre-Marie Badin, Danesh H Sopariwala, Sabina Lorca, Vihang A Narkar
Aryl Hydrocarbon Receptor Nuclear Translocator/ hypoxia-inducible factor 1 beta (ARNT/ HIF1β), a member of bHLH-PAS family of transcriptional factors, plays a critical role in metabolic homeostasis, insulin resistance and glucose intolerance. The contributions of ARNT in pancreas, liver and adipose tissue to energy balance through gene regulation have been described. Surprisingly, the impact of ARNT signaling in the skeletal muscles, one of the major organs involved in glucose disposal, has not been investigated, especially in type II diabetes...
2016: PloS One
https://www.readbyqxmd.com/read/27991966/genotypic-carriers-of-the-obesity-associated-fto-polymorphism-exhibit-different-cardiometabolic-profiles-after-an-intervention
#10
Greice G Moraes, Cézane P Reuter, Jane D P Renner, Elisa I Klinger, Michele B Ferreira, Elza D DE Mello, Andréia DE M Valim, Miria S Burgos
Background: Children and adolescents with at-risk genotypes (AA/AT) of the rs9939609 polymorphism in FTO, a fat mass and obesity-associated gene, may exhibit different cardiometabolic profile responses than subjects with the TT genotype after an interdisciplinary intervention. Methods: The sample consisted of 36 school children from southern Brazil. We used DNA quantitation and real-time polymerase chain reaction (PCR) for polymorphism genotyping. We measured anthropometric parameters (body mass index (BMI), waist circumference, hip circumference, waist-hip ratio, body fat percentage and skinfold sum), biochemical parameters (glucose, lipid profile, ultra-sensitive C-reactive protein, uric acid, alanine aminotransferase, aspartate aminotransferase, insulin and adiponectin) and blood pressure...
October 2016: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/27987997/enhanced-anti-obesity-effects-of-complex-of-resistant-starch-and-chitosan-in-high-fat-diet-fed-rats
#11
Xu Si, Padraig Strappe, Chris Blanchard, Zhongkai Zhou
This study investigated the interventional effect of resistant starch (RS), chitosan (CS) and chitosan-starch complexes (CL) on blood glucose, lipid composition and oxidative stress in high-fat diet fed rats. Compared with RS or CS alone, CL administration performed more efficiently in controlling body weight and adipose tissue mass, together with an increase in HDL-C concentration, oxidative stress suppression by increasing body antioxidant capacity. Gene expression analysis demonstrated the fatty acid and triglyceride synthesis and metabolism gene SREBP-1, adipocyte differentiation gene PPARγ, cholesterol synthesis gene HMGCR, gluconeogenesis gene GAPDH, were significantly down-regulated, whilst lipid oxidation gene Acox1 and liver functional genes Gstm2, Gclc were up-regulated following CL consumption compared with single RS or CS treatment...
February 10, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27983718/adeno-associated-virus-mediated-expression-of-myostatin-propeptide-improves-the-growth-of-skeletal-muscle-and-attenuates-hyperglycemia-in-db-db-mice
#12
J Jiang, G Shen, J Li, C Qiao, B Xiao, H Yan, D W Wang, Xiao Xiao
Inhibition of myostatin, a negative growth modulator for muscle, can functionally enhance muscle mass and improve glucose and fat metabolism in myostatin propeptide (MPRO) transgenic mice. This study was to investigate whether myostatin inhibition by adeno-associated virus (AAV) mediated gene delivery of MPRO could improve muscle mass and achieve therapeutic effects on glucose regulation and lipid metabolism in the db/db mice and the mechanisms involved in that process. Eight-week-old male db/db mice were administered saline, AAV-GFP, AAV-MPRO/Fc vectors and monitored random blood glucose levels and body weight for 36 weeks...
December 16, 2016: Gene Therapy
https://www.readbyqxmd.com/read/27955950/resistive-training-and-molecular-regulators-of-vascular-metabolic-risk-in-chronic-stroke
#13
Alice S Ryan, Guoyan Li, Charlene Hafer-Macko, Frederick M Ivey
BACKGROUND: Peroxisome proliferator-activated receptor (PPAR)-γ coactivator (PGC-1α) gene and Sirtuin-1 (SIRT-1) respond to physiological stimuli and regulate insulin resistance. Inflammatory markers tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), C-reactive protein (CRP), and the soluble forms of intracellular adhesion molecule (sICAM-1) and vascular CAM-1 (sVCAM-1) are associated with increased risk of diabetes and coronary heart disease. Resistive training (RT) reduces hyperinsulinemia and improves insulin action in chronic stroke...
December 9, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27933755/maternal-pre-pregnancy-bmi-downregulates-neonatal-cord-blood-lep-methylation
#14
R Kadakia, Y Zheng, Z Zhang, W Zhang, L Hou, J L Josefson
BACKGROUND: Neonatal adiposity has many determinants and may be a risk factor for future obesity. Epigenetic regulation of metabolically important genes is a potential contributor. OBJECTIVES: The objective of the study is to determine whether methylation changes in the LEP gene in cord blood DNA are impacted by the maternal environment or affect neonatal adiposity measures. METHODS: A cross-sectional study of 114 full-term neonates born to healthy mothers with normal glucose tolerance was performed...
December 8, 2016: Pediatric Obesity
https://www.readbyqxmd.com/read/27932304/vitamin-d-and-type-2-diabetes
#15
REVIEW
Paul Lips, Marelise Eekhoff, Natasja van 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/27930556/the-fto-rs9939609-and-lepr-rs1137101-mothers-newborns-gene-polymorphisms-and-maternal-fat-mass-index-effects-on-anthropometric-characteristics-in-newborns-a-cross-sectional-study-on-mothers-newborns-gene-polymorphisms-the-fto-lepr-study-strobe-compliant-article
#16
Claudiu Mărginean, Cristina Oana Mărginean, Mihaela Iancu, Lorena Elena Meliţ, Florin Tripon, Claudia Bănescu
The aim of this study was to assess the impact of mothers' and newborns' fat mass and obesity-associated gene (FTO) rs9939609 and leptin receptor (LEPR) rs1137101 gene polymorphisms on neonatal anthropometric parameters in order to identify a potential risk for developing obesity.We performed a cross-sectional study on 355 mother-newborn couples in an Obstetrics Gynecology Tertiary Hospital from Romania, evaluated with regard to anthropometric parameters, clinical and laboratory parameters besides 2 genetic polymorphisms (FTO rs9939609 and LEPR rs1137101)...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27915341/rs1501299-polymorphism-in-the-adiponectin-gene-and-their-association-with-total-adiponectin-levels-insulin-resistance-and-metabolic-syndrome-in-obese-subjects
#17
Daniel Antonio de Luis, Olatz Izaola, Beatriz de la Fuente, David Primo, Hilda Fernandez Ovalle, Enrique Romero
BACKGROUND AND AIMS: The aim of this study was to determine the association of single nucleotide polymorphism rs1501299 in the ADIPOQ gene with body weight, insulin resistance, serum adipokine levels and metabolic syndrome (MetS). METHODS: The study involved a population of 1,007 adult obese subjects. Parameters like body weight, fat mass, waist circumferences, blood pressure, fasting blood glucose, C-reactive protein, insulin concentration, homeostasis model assessment for insulin resistance (HOMA-IR), lipid profile and adipocytokines levels (leptin, adiponectin and resistin) were all measured...
December 3, 2016: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/27914922/negative-regulation-of-hepatic-fat-mass-and-obesity-associated-fto-gene-expression-by-insulin
#18
Tooru M Mizuno, Pei San Lew, Yanming Luo, Arnold Leckstrom
AIMS: To investigate the role of glucose and insulin in the regulation of hepatic fat mass and obesity associated (Fto) gene expression and the role of hepatic Fto in the regulation of gluconeogenic gene expression. MAIN METHODS: To determine the effect of hyperglycemia on hepatic Fto expression, levels of Fto mRNA in liver were compared between normoglycemic/normoinsulinemic, hypereglycemic/hyperinsulinemic, and hyperglycemic/hypoinsulinemic mice. To determine the direct effect of insulin on Fto expression, levels of Fto, glucose-6-phosphatase (G6pase), and phosphoenolpyruvate carboxykinase (Pepck) mRNA levels were compared between control and insulin-treated mouse liver tissues cultured ex vivo and immortalized mouse hepatocytes AML12...
November 30, 2016: Life Sciences
https://www.readbyqxmd.com/read/27906582/fiat-deletion-increases-bone-mass-but-does-not-prevent-high-fat-diet-induced-metabolic-complications
#19
Bahareh Hekmatnejad, Vionnie W C Yu, William Addison, Vice Mandic, Martin Pellicelli, Alice Arabian, René St-Arnaud
FIAT (Factor Inhibiting ATF4-mediated Transcription) interacts with ATF4 to repress its transcriptional activity. We performed a phenotypic analysis of Fiat-deficient male mice (Fiat(-/Y)) at 8 and 16 weeks of age. Fiat(-/Y) mice appeared normal at birth and weight gain was comparable between genotypes. μCT analysis of proximal femur demonstrated 46% and 13% age-dependent increases in trabecular bone volume and thickness, respectively, in Fiat(-/Y) mice. Cortical bone measurements at the femoral midshaft revealed a significant increase in cortical thickness in older Fiat(-/Y) mice...
December 1, 2016: Endocrinology
https://www.readbyqxmd.com/read/27900258/adipocyte-specific-hypoxia-inducible-gene-2-promotes-fat-deposition-and-diet-induced-insulin-resistance
#20
Marina T DiStefano, Rachel J Roth Flach, Ozlem Senol-Cosar, Laura V Danai, Joseph V Virbasius, Sarah M Nicoloro, Juerg Straubhaar, Sezin Dagdeviren, Martin Wabitsch, Olga T Gupta, Jason K Kim, Michael P Czech
OBJECTIVE: Adipose tissue relies on lipid droplet (LD) proteins in its role as a lipid-storing endocrine organ that controls whole body metabolism. Hypoxia-inducible Gene 2 (Hig2) is a recently identified LD-associated protein in hepatocytes that promotes hepatic lipid storage, but its role in the adipocyte had not been investigated. Here we tested the hypothesis that Hig2 localization to LDs in adipocytes promotes adipose tissue lipid deposition and systemic glucose homeostasis. METHOD: White and brown adipocyte-deficient (Hig2(fl/fl) × Adiponection cre+) and selective brown/beige adipocyte-deficient (Hig2(fl/fl) × Ucp1 cre+) mice were generated to investigate the role of Hig2 in adipose depots...
December 2016: Molecular Metabolism
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