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https://www.readbyqxmd.com/read/28943275/mifepristone-enhances-insulin-stimulated-akt-phosphorylation-and-glucose-uptake-in-skeletal-muscle-cells
#1
Izela Bernal-Sore, Mario Navarro-Marquez, César Osorio-Fuentealba, Francisco Díaz-Castro, Andrea Del Campo, Camila Donoso-Barraza, Omar Porras, Sergio Lavandero, Rodrigo Troncoso
Mifepristone is the only FDA-approved drug for glycaemia control in patients with Cushing's syndrome and type 2 diabetes. Mifepristone also has beneficial effects in animal models of diabetes and patients with antipsychotic treatment-induced obesity. However, the mechanisms through which Mifepristone produces its beneficial effects are not completely elucidated. PURPOSE: To determine the effects of mifepristone on insulin-stimulated glucose uptake on a model of L6 rat-derived skeletal muscle cells...
September 21, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28940418/rare-sugars-d-allulose-d-tagatose-and-d-sorbose-differently-modulate-lipid-metabolism-in-rats
#2
Yasuo Nagata, Narumi Mizuta, Akane Kanasaki, Kazunari Tanaka
BACKGROUND: Rare sugars including D-allulose, D-tagatose, and D-sorbose are present in limited quantities in nature; some of these rare sugars are now commercially produced using microbial enzymes. Apart from the anti-obesity and anti-hyperglycemic activities of D-allulose, effects of these sugars on lipid metabolism have not been investigated. Therefore, we aimed to determine if and how D-tagatose and D-sorbose modulate lipid metabolism in rats. After feeding these rare sugars to rats, parameters on lipid metabolism were determined...
September 21, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28940395/delay-discounting-as-impaired-valuation-delayed-rewards-in-an-animal-obesity-model
#3
David P Jarmolowicz, Jennifer L Hudnall, Luanne Hale, Stephen C Fowler, Marco Bortolato, Shea M Lemley, Michael J Sofis
Obesity is a major public health problem, which, like many forms of addiction, is associated with an elevated tendency to choose smaller immediate rather than larger delayed rewards, a response pattern often referred to as excessive delay discounting. Although some accounts of delay discounting conceptualize this process as impulsivity (placing the emphasis on overvaluing the smaller immediate reward), others have conceptualized delay discounting as an executive function (placing the emphasis on delayed rewards failing to retain their value)...
September 2017: Journal of the Experimental Analysis of Behavior
https://www.readbyqxmd.com/read/28937250/role-of-exercise-induced-calmodulin-protein-kinase-camk-ii-activation-in-the-regulation-of-omega-6-fatty-acids-and-lipid-metabolism-genes-in-rat-skeletal-muscle
#4
J S Joseph, A O Ayeleso, E Mukwevho
Activation of calmodulin dependent protein kinase (CaMK)II by exercise is beneficial in controlling membrane lipids associated with type 2 diabetes and obesity. Regulation of lipid metabolism is crucial in the improvement of type 2 diabetes and obesity associated symptoms. The role of CaMKII in membrane associated lipid metabolism was the focus of this study. Five to six weeks old male Wistar rats were used in this study. GC×GC-TOFMS technique was used to determine the levels of polyunsaturated fatty acids (linoleic acid, arachidonic acid and 11,14-eicosadienoic acid)...
September 22, 2017: Physiological Research
https://www.readbyqxmd.com/read/28936585/understanding-intestinal-glucose-transporter-expression-in-obese-compared-to-non-obese-subjects
#5
Rebecca A Deal, Yueming Tang, Reid Fletcher, Alfonso Torquati, Philip Omotosho
INTRODUCTION: The impact of Roux-en-Y gastric bypass (RYGB) on weight loss and co-morbid disease resolution is well established. However, the mechanisms underlying the procedure remain incompletely understood. Intestinal remodeling involving glucose transporters (GLUTs) may play a crucial role. Rat studies have demonstrated morphological adaptation of GLUTs within adipose and intestinal cells in association with the reprogramming of glucose metabolism. There is a limited understanding of the variations in expression amongst GLUT family receptors in the human intestine...
September 21, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28933980/panduratin-a-prevents-tumor-necrosis-factor-alpha-induced-muscle-atrophy-in-l6-rat-skeletal-muscle-cells
#6
Bo-Kyung Sa, Changhee Kim, Mi-Bo Kim, Jae-Kwan Hwang
Panduratin A, a prenylated chalcone compound, has anti-obesity, anti-bacterial, anti-cancer, anti-inflammatory, and anti-oxidative activities. However, its preventive effect on muscle atrophy has not been studied. The purpose of this study was to evaluate the inhibitory effect of panduratin A on muscle atrophy and to investigate its molecular mechanisms in tumor necrosis factor-alpha (TNF-α)-treated L6 rat skeletal muscle cells. Panduratin A restored the myotube diameter reduced by TNF-α. At the molecular level, panduratin A elevated phosphatidylinositol 3 kinase/Akt/mammalian target of rapamycin pathway and stimulated the MyoD and myogenin mRNA expression decreased by TNF-α...
September 21, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28932772/diabetes-alters-vascular-mechanotransduction-data-pressure-induced-regulation-of-nf-kapa-b-p65-and-translational-associated-signaling-in-the-rat-inferior-vena-cava
#7
Kevin M Rice, Nandini D P K Manne, Ravikumar Arvapalli, Gautam K Ginjupalli, Eric R Blough
Diabetic patients have a high rate of vein graft failure due to attrition or vessel occlusion that cause recurrent ischemic events or vein graft. Veins grafted into a high-pressure arterial environment must undergo vascular remodeling to better handle the altered hemodynamics and intravascular increased pressure. Multiple cellular and molecular events are purported to be associated with vascular remodeling of veins. Understanding the effect diabetes has on vascular mechano-transductive response is critical to decreasing graft failure rates...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28929308/influence-of-obesity-on-experimental-periodontitis-in-rats-histopathological-histometric-and-immunohistochemical-study
#8
Elizangela Partata Zuza, Valdir Gouveia Garcia, Letícia Helena Theodoro, Edilson Ervolino, Luiz Fernando Veloso Favero, Mariéllen Longo, Fernando Salimon Ribeiro, Alex Tadeu Martins, Luís Carlos Spolidorio, José Antônio Sampaio Zuanon, Benedicto Egbert Corrêa de Toledo, Juliana Rico Pires
OBJECTIVES: This study assessed the influence of obesity on the progression of ligature-induced periodontitis in rats. MATERIALS AND METHODS: Forty-eight adult Wistar rats were randomly divided into two groups: the HL group (n = 24) was fed high-fat animal food to induce obesity, and the NL group (n = 24) was fed normolipidic animal food. Obesity was induced within a period of 120 days, and the induction of experimental periodontitis (EP) was subsequently performed for 30 days...
September 19, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28928661/ginkgo-biloba-extract-gbe-stimulates-the-hypothalamic-serotonergic-system-and-attenuates-obesity-in-ovariectomized-rats
#9
Renata M Banin, Iracema S de Andrade, Suzete M Cerutti, Lila M Oyama, Mônica M Telles, Eliane B Ribeiro
Menopause is associated with increased risk to develop obesity but the mechanisms involved are not fully understood. We have shown that Ginkgo biloba extract (GbE) improved diet-induced obesity. Since GbE might be effective in the treatment of obesity related to menopause, avoiding the side effects of hormone replacement therapy, we investigated the effect of GbE on hypothalamic systems controlling energy homeostasis. Wistar rats were either ovariectomized (OVX) or Sham-operated. After 2 months, either 500 mg...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28928236/histone-deacetylase-inhibition-ameliorates-hypertension-and-hyperglycemia-in-a-model-of-cushing-s-syndrome
#10
Hae-Ahm Lee, Seol-Hee Kang, Mina Kim, Eunjo Lee, Hyun-Min Cho, Eun-Kyung Moon, Inkyeom Kim
Cushing's syndrome (CS) caused by hypercortisolism is occasionally accompanied by metabolic disorders such as hypertension, diabetes mellitus (DM), dyslipidemia and central obesity. Thus, morbidity and mortality, observed in cardiovascular disease, are elevated in patients with CS. We hypothesized that HDAC inhibition (HDACi) decreased transcriptional activity of glucocorticoid receptor (GR), which ameliorates hypertension and hyperglycemia in patients with CS. To establish an animal model of hypercortisolism, Sprague-Dawley rats were infused with adrenocorticotropic hormone (ACTH, 40 ng/day) or dexamethasone (Dex, 10 μg/day) via osmotic minipumps for 4 weeks...
September 19, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28927908/the-impact-of-the-standard-american-diet-in-rats-effects-on-behavior-physiology-and-recovery-from-inflammatory-injury
#11
Stacie K Totsch, Tammie L Quinn, Larissa J Strath, Laura J McMeekin, Rita M Cowell, Barbara A Gower, Robert E Sorge
BACKGROUND AND AIMS: Obesity is a significant health concern in the Western world and the presence of comorbid conditions suggests an interaction. The overlapping distributions of chronic pain populations and obesity suggests that an interaction may exist. Poor quality diet (high carbohydrates, saturated fats, omega-6 polyunsaturated fatty acids) can lead to increased adiposity which can activate immune cells independent of the activating effect of the diet components themselves. This dual action can contribute to chronic inflammation that may alter susceptibility to chronic pain and prolong recovery from injury...
September 16, 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/28923829/estrogen-deprivation-aggravates-cardiac-hypertrophy-in-non-obese-type-2-diabetic-goto-kakizaki-gk-rats
#12
Nattayaporn Apaijai, Narattaphol Charoenphandhu, Jitjiroj Ittichaichareon, Panan Suntornsaratoon, Nateetip Krishnamra, Ratchaneevan Aeimlapa, Siriporn C Chattipakorn, Nipon Chattipakorn
Both type 2 diabetes mellitus (T2DM) and estrogen deprivation have been shown to be associated with the development of cardiovascular disease and adverse cardiac remodeling.  However, the role of estrogen deprivation on adverse cardiac remodeling in non-obese T2DM rats has not been clearly elucidated.  We hypothesized that estrogen-deprivation aggravates adverse cardiac remodeling in Goto-Kakizaki (GK) rats.  Wild-type (WT) and GK rats at the age of 9 months old were divided into 2 subgroups to have either a sham operation (WTS, GKS) or a bilateral ovariectomy (WTO, GKO) (n=6/subgroup)...
September 18, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28923316/different-combinations-of-maternal-and-postnatal-diet-are-reflected-in-changes-of-hepatic-parenchyma-and-hepatic-tnf-alpha-expression-in-male-rat-offspring
#13
Željka Perić Kačarević, Anđela Grgić, Darija Šnajder, Nikola Bijelić, Tatjana Belovari, Olga Cvijanović, Valerija Blažičević, Radivoje Radić
Obesity is related to increased TNF-alpha production in different tissues. TNF-alpha is connected to mitochondrial dysfunction in the liver and also development of fatty infiltration of the liver. Also, postnatal change from normal to high-fat diet causes a significant increase in TNF-alpha serum levels. The aim of this research was to determine how maternal diet and switching male offspring to a different dietary regime after lactation influences rat liver. Ten female Sprague Dawley rats at nine weeks of age were randomly divided in two groups and fed either standard laboratory chow or high-fat diet during six weeks, and then mated with the same male subject...
September 15, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28922661/lysophosphatidic-acid-inhibits-insulin-signaling-in-primary-rat-hepatocytes-via-the-lpa3-receptor-subtype-and-is-increased-in-obesity
#14
Susann Fayyaz, Lukasz Japtok, Fabian Schumacher, Dominik Wigger, Tim Julius Schulz, Kathrin Haubold, Erich Gulbins, Heinz Völler, Burkhard Kleuser
BACKGROUND/AIMS: Obesity is a main risk factor for the development of hepatic insulin resistance and it is accompanied by adipocyte hypertrophy and an elevated expression of different adipokines such as autotaxin (ATX). ATX converts lysophosphatidylcholine to lysophosphatidic acid (LPA) and acts as the main producer of extracellular LPA. This bioactive lipid regulates a broad range of physiological and pathological responses by activation of LPA receptors (LPA1-6). METHODS: The activation of phosphatidylinositide 3-kinases (PI3K) signaling (Akt and GSK-3ß) was analyzed via western blotting in primary rat hepatocytes...
September 1, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28921743/exercise-training-dose-differentially-alters-muscle-and-heart-capillary-density-and-metabolic-functions-in-an-obese-rat-with-metabolic-syndrome
#15
Marcus Vinicius Machado, Aline Bomfim Vieira, Fabiana Gomes da Conceição, Alessandro Rodrigues Nascimento, Antonio Claudio Lucas da Nóbrega, Eduardo Tibirica
We evaluated the effect of frequency, duration and intensity of exercise training on metabolic parameters and structural capillary density in obese rats with metabolic syndrome (MS). Wistar-Kyoto rats were fed a either standard commercial diet (CON) or high-fat diet (HFD). Animals that received the HFD were randomly separated into either a sedentary (SED) group or 8 different exercise groups that varied by the frequency, duration and intensity of training. After 12 weeks of aerobic exercise training, body composition, aerobic capacity, hemodynamic variables, metabolic parameters and capillary density in the heart and skeletal muscle were evaluated...
September 17, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28920089/cooking-methods-affect-phytochemical-composition-and-anti-obesity-potential-of-soybean-glycine-max-seeds-in-wistar-rats
#16
Cerile Ypolyte Woumbo, Dieudonné Kuate, Hilaire Macaire Womeni
This work aimed at investigating the effects of three domestic cooking methods (roasting, sprouting and boiling) on phytochemical contents (phenolic content, flavonoid, fibre), and anti-obesity (weight loss, hypoglycemic effect, serum lipids) potential of soybean seeds in obese male rats. Ten different forms were implemented, combining hulled/unhulled and raw/cooked soybean seeds using a basal and a hypercaloric diet as controls. Unhulled Roasted Soybean (URS) exhibited the highest phenolic content and a greater antioxidant activity by the FRAP assay than BHT at certain concentrations...
August 2017: Heliyon
https://www.readbyqxmd.com/read/28919580/concomitant-obesity-and-metabolic-syndrome-add-to-the-atrial-arrhythmogenic-phenotype-in-male-hypertensive-rats
#17
Mathias Hohl, Dennis H Lau, Andreas Müller, Adrian D Elliott, Benedikt Linz, Rajiv Mahajan, Jeroen M L Hendriks, Michael Böhm, Ulrich Schotten, Prashanthan Sanders, Dominik Linz
BACKGROUND: Besides hypertension, obesity and the metabolic syndrome have recently emerged as risk factors for atrial fibrillation. This study sought to delineate the development of an arrhythmogenic substrate for atrial fibrillation in hypertension with and without concomitant obesity and metabolic syndrome. METHODS AND RESULTS: We compared obese spontaneously hypertensive rats (SHR-obese, n=7-10) with lean hypertensive controls (SHR-lean, n=7-10) and normotensive rats (n=7-10)...
September 17, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28914596/obesity-and-periodontitis-an-experimental-study-to-evaluate-the-periodontal-and-systemic-effects-of-the-co-morbidity
#18
Leire Virto, Pilar Cano, Vanesa Jiménez-Ortega, Pilar Fernández-Mateos, Jerián González, Ana Isabel Esquifino, Mariano Sanz
BACKGROUND: Obesity and overweight have been associated with periodontitis. This study aims to evaluate the periodontal and systemic effects of this association in a validated experimental model. METHODS: 28 male Wistar rats were randomly divided in four groups: control group (Con) (fed with standard diet); high-fat diet group (HFD) (fed with a diet containing 35.2% fat); control group with induced periodontitis (Con-Perio) and HFD group with induced periodontitis (HFD-Perio)...
September 15, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28914170/the-investigation-of-the-effects-of-topiramate-on-the-hypothalamic-levels-of-fat-mass-obesity-associated-protein-and-neuropeptide-y-in-obese-female-rats
#19
Işınsu Alkan, Berrin Zuhal Altunkaynak, Gamze Altun, Erkan Erener
OBJECTIVE: The aim of the present study is to investigate the effects of topiramate on the fat mass/obesity-associated protein (FTO) and on the neuropeptide Y (NPY) level in the hypothalamus depending on the recently increased prevalence of obesity. METHOD: In this study, twenty-four female rats were divided into four equal groups: Non-obese control, obese control, non-obese topiramate, and obese topiramate. Obese groups were fed with a 40% high-fat diet. At the end of the 9th week, the drug treatment started and the subjects were treated with topiramate once a day for 6 weeks...
September 15, 2017: Nutritional Neuroscience
https://www.readbyqxmd.com/read/28913539/expression-of-concern-selective-impairment-of-insulin-signalling-in-the-hypothalamus-of-obese-zucker-rats
#20
J B C Carvalheira, E B Ribeiro, E P Araújo, R B Guimarães, M M Telles, M Torsoni, J A R Gontijo, L A Velloso, M J A Saad
No abstract text is available yet for this article.
September 14, 2017: Diabetologia
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