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https://www.readbyqxmd.com/read/27923249/thyroid-function-in-human-obesity-underlying-mechanisms
#1
L C Fontenelle, M M Feitosa, J S Severo, T E C Freitas, J B S Morais, F L Torres-Leal, G S Henriques, D do Nascimento Marreiro
Obesity is associated with several metabolic and endocrine disorders; and changes in plasma concentrations, secretion patterns, and clearance of various hormones are observed in obese patients. In this context, recent research has shown that overweight can influence the function of the thyroid gland, usually leading to increased thyrotropin concentrations and changes in the ratio between the hormones triiodothyronine and thyroxine, though within the normal range. The etiology of these changes is still unclear; however, several mechanisms have been proposed including the adaptive process to increase energy expenditure, hyperleptinemia, changes in the activity of deiodinases, the presence of thyroid hormones resistance, chronic low-grade inflammation, and insulin resistance...
December 2016: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/27923166/a-comparative-systematic-review-of-yasmin-drospirenone-pill-versus-standard-treatment-options-for-symptoms-of-polycystic-ovary-syndrome
#2
REVIEW
Jing Li, Jing Ren, Wenxia Sun
OBJECTIVES: To systematically review the impact of Yasmin (drospirenone pill) compares with other standard treatments for symptoms of Polycystic Ovary Syndrome (PCOS). STUDY DESIGN: The relevant studies of the randomized controlled trials in women with PCOS treated with drospirenone were retrieved and the systematic evaluation was conducted. RESULTS: Eighteen articles were included. Compared with drospirenone (DRSP) monotherapy, DRSP plus metformin was better in reducing body mass index (BMI), luteinizing hormone (LH) and low-density lipoprotein cholesterol (LDL-C)...
November 16, 2016: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/27922941/exercise-training-ameliorates-glucosamine-induced-insulin-resistance-in-ovariectomized-rats
#3
Chung-Hwan Chen, Tsang-Hai Huang, Tsung-Lin Cheng, Chi-Fen Chang, Chau-Zen Wang, Meng-Hsing Wu, Lin Kang
OBJECTIVE: Glucosamine (GlcN), which has been reported to induce insulin resistance (IR), is a popular nutritional supplement used to treat osteoarthritis in menopausal women. We previously demonstrated that GlcN treatment caused IR in ovariectomized rats by reducing the expression of glucose transport protein subtype 4 (GLUT-4) in skeletal muscle. In the present study, we hypothesized that endurance exercise training can reverse GlcN-induced IR. METHODS: Fifty female rats were randomly divided into five groups with 10 rats in each group: (1) sham-operated group; (2) sham-operated group with GlcN treatment for 14 days; (3) ovariectomy (OVX) group; (4) OVX with GlcN treatment; and (5) OVX with GlcN treatment followed by exercise training (running program) for 8 weeks...
December 5, 2016: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/27922820/rapamycin-treatment-benefits-glucose-metabolism-in-mouse-models-of-type-2-diabetes
#4
Peter C Reifsnyder, Kevin Flurkey, Austen Te, David E Harrison
Numerous studies suggest that rapamycin treatment promotes insulin resistance, implying that rapamycin could have negative effects on patients with, or at risk for, type 2 diabetes (T2D). New evidence, however, indicates that rapamycin treatment produces some benefits to energy metabolism, even in the context of T2D. Here, we survey 5 mouse models of T2D (KK, KK-Ay, NONcNZO10, BKS-db/db, TALLYHO) to quantify effects of rapamycin on well-recognized markers of glucose homeostasis within a wide range of T2D environments...
November 30, 2016: Aging
https://www.readbyqxmd.com/read/27922752/abnormal-glucose-metabolism-and-high-energy-expenditure-in-idiopathic-pulmonary-arterial-hypertension
#5
Gustavo A Heresi, Steven K Malin, Jarrod W Barnes, Liping Tian, John P Kirwan, Raed A Dweik
RATIONALE: Insulin resistance has emerged as a potential mechanism related to the pathogenesis of idiopathic pulmonary arterial hypertension (IPAH). However, direct measurements of insulin and glucose metabolism have not been performed in IPAH patients to date. OBJECTIVES: To perform comprehensive metabolic phenotyping on humans with IPAH. METHODS: We assessed plasma insulin and glucose using an oral glucose tolerance test and estimated insulin resistance and beta-cell function in 14 IPAH patients and 14 controls matched for age, sex, blood pressure, and body mass index (BMI),...
December 6, 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27922115/perilipin-5-fine-tunes-lipid-oxidation-to-metabolic-demand-and-protects-against-lipotoxicity-in-skeletal-muscle
#6
Claire Laurens, Virginie Bourlier, Aline Mairal, Katie Louche, Pierre-Marie Badin, Etienne Mouisel, Alexandra Montagner, André Marette, Angelo Tremblay, John S Weisnagel, Hervé Guillou, Dominique Langin, Denis R Joanisse, Cedric Moro
Lipid droplets (LD) play a central role in lipid homeostasis by controlling transient fatty acid (FA) storage and release from triacylglycerols stores, while preventing high levels of cellular toxic lipids. This crucial function in oxidative tissues is altered in obesity and type 2 diabetes. Perilipin 5 (PLIN5) is a LD protein whose mechanistic and causal link with lipotoxicity and insulin resistance has raised controversies. We investigated here the physiological role of PLIN5 in skeletal muscle upon various metabolic challenges...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27922090/mir-146a-mediated-suppression-of-the-inflammatory-response-in-human-adipocytes
#7
Julian Roos, Eveliina Enlund, Jan-Bernd Funcke, Daniel Tews, Karlheinz Holzmann, Klaus-Michael Debatin, Martin Wabitsch, Pamela Fischer-Posovszky
The obesity-associated inflammation of white adipose tissue (WAT) is one of the factors leading to the development of related diseases such as insulin resistance and liver steatosis. Recently, microRNAs (miRNAs) were identified as important regulators of WAT functions. Herein, we cultured human Simpson-Golabi-Behmel syndrome (SGBS) adipocytes with macrophage-conditioned medium (MacCM) and performed an Affimetrix miRNA array to identify miRNAs differentially expressed under inflammatory conditions. We identified 24 miRNAs differentially expressed upon inflammation in human adipocytes and miR-146a was the most up-regulated miRNA species...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27921433/-is-glucosis-only-basic-energy-substrate
#8
Luboš Sobotka
At present time glucose is primarily considered as basic energy substrate. Therefore, it is recommended to give amount of glucose which is necessary for oxidation and energy production. As critical illness is connected with so-called insulin resistance, it is recommended to reduce the glucose dose and maintain normal blood glucose. Glucose, however, may not only be the principal energy substrate but also the substrate necessary for many metabolic reactions, which are essential for normal reactivity and survival...
2016: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/27921430/-obstructive-sleep-apnoea-and-type-2-diabetes-mellitus
#9
Andrea Plíhalová, Kateřina Westlake, Jan Polák
Obstructive sleep apnoea syndrome (OSA) is a disease very frequently occurring in people with type 2 diabetes, that significantly increases cardiovascular morbidity and mortality. In a number of studies, OSA has been identified as an independent risk factor for the development of insulin resistance, glucose intolerance and type 2 diabetes mellitus. Disorders of glucose homeostasis in patients with OSA are probably mediated by chronic intermittent hypoxia and/or sleep fragmentation through activation of the sympathetic nervous system, the hypothalamic-pituitary-adrenal stress axis, pro-inflammatory paths or oxidative stress...
2016: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/27921426/-gestational-diabetes-mellitus
#10
Hana Krejčí
The present generation of women of childbearing age more frequently suffer from overweight, obesity, initial as well as fully established metabolic syndrome, which together with postponing motherhood until the third decade in life plays an important role in the increasing incidence of gestational diabetes (GDM) that currently affects about 1/5 of pregnant women. However the causal link between diabetes during pregnancy and metabolic diseases in the whole population is mutual. By way of epigenetic changes, maternal diabetes unfavourably programmes metabolism of the offspring, who tend to transfer the disorder to the next generations...
2016: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/27921351/the-effect-of-combined-inositol-hexakisphosphate-and-inositol-supplement-in-streptozotocin-induced-type-2-diabetic-rats
#11
Shadae R Foster, Felix O Omoruyi, Juan Bustamante, Ruby L A Lindo, Lowell L Dilworth
Inositol hexakisphosphate (IP6) and inositol both regulate insulin secretion, but their combined use in the management of diabetes deserves investigation. The combined effects of IP6 and inositol supplementation were investigated in streptozotocin-induced type 2 diabetic rats. The following groups of rats were studied for 8 weeks: non-diabetic control, non-diabetic high-fat diet control, diabetic untreated, diabetic rats treated with the combination of IP6 and inositol (650 mg/kg bw) and diabetic rats treated with glibenclamide (10 mg/kg bw)...
December 6, 2016: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/27921254/the-impact-of-vitamin-d-supplementation-on-neurodegeneration-tnf-%C3%AE-concentration-in-hypothalamus-and-csf-to-plasma-ratio-of-insulin-in-high-fat-diet-induced-obese-rats
#12
Ghazaleh Nameni, Ghazaleh Hajiluian, Parviz Shahabi, Mahdieh Abbasalizad Farhangi, Mehran Mesgari-Abbasi, Mohammad-Reza Hemmati, Seyed Mahdi Vatandoust
There is growing evidence that obesity can lead to neurodegeneration induced by pro-inflammatory cytokines such as tumor necrosis factor (TNF-α). Moreover, obesity is associated with reduced transport of insulin through the blood-brain barrier (BBB). Insulin deficiency in the brain especially in the hypothalamus region has neurodegenerative and obesity-promoting effects. Because of the anti-inflammatory and neuroprotective effects of vitamin D, in the current experimental study, we aimed to investigate the effects of vitamin D supplementation on neurodegeneration, TNF-α concentration in the hypothalamus, and cerebrospinal fluid (CSF) to serum ratio of insulin in high-fat-diet-induced obese rats...
December 6, 2016: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/27921251/skin-manifestations-of-insulin-resistance-from-a-biochemical-stance-to-a-clinical-diagnosis-and-management
#13
REVIEW
Gloria González-Saldivar, René Rodríguez-Gutiérrez, Jorge Ocampo-Candiani, José Gerardo González-González, Minerva Gómez-Flores
Worldwide, more than 1.9 billion adults are overweight, and around 600 million people suffer from obesity. Similarly, ~382 million individuals live with diabetes, and 40-50% of the global population is labeled at "high risk" (i.e., prediabetes). The impact of these two chronic conditions relies not only on the burden of illnesses per se (i.e., associated increased morbidity and mortality), but also on their increased cost, burden of treatment, and decreased health-related quality of life. For this review a comprehensive search in several databases including PubMed (MEDLINE), Ovid EMBASE, Web of Science, and Scopus was conducted...
December 5, 2016: Dermatology and Therapy
https://www.readbyqxmd.com/read/27921141/kidney-stones-diseases-and-glycaemic-statuses-focus-on-the-latest-clinical-evidences
#14
REVIEW
Leonardo Spatola, Claudio Angelini, Salvatore Badalamenti, Silvio Maringhini, Giovanni Gambaro
Diabetes and obesity are already recognized as potential risk factors for nephrolithiasis, especially for uric acid stones. Insulin resistance and hyperinsulinemia actively contribute to impaired ability to excrete an acid load and altered ammonium production, leading to a lower urinary pH compared to non-diabetic controls. All these electrolytic disorders play an important role in stone formation and aggregation, especially in uric acid stones. There are still missing points in scientific evidence if the increased risk in stone formation is already existing even in the prediabetic statuses (isolated impaired glucose tolerance, isolated impaired fasting glucose, and associated impaired glucose tolerance/impaired fasting glucose) as well as it is worth to consider the same level of risk...
December 5, 2016: Urolithiasis
https://www.readbyqxmd.com/read/27921045/clinical-scenario-of-the-metabolic-syndrome
#15
REVIEW
Swantje Brede, Georg Serfling, Johanna Klement, Sebastian M Schmid, Hendrik Lehnert
The term metabolic syndrome (MeS) refers to a cluster of associated symptoms composed of impaired fasting glucose, abdominal obesity, hypertension, and dyslipidemia. MeS is associated with an increased risk of cardiovascular and diabetes-associated morbidity and mortality. The increased amount of visceral fat together with a chronic inflammatory state predisposes to the development of arteriosclerosis. Furthermore, insulin resistance (IR) and dyslipidemia are associated with fatty liver disease. In addition, MeS is linked to non-cardiovascular diseases such as cancer as well as psychiatric or endocrine disorders...
October 2016: Visceral Medicine
https://www.readbyqxmd.com/read/27921044/non-alcoholic-fatty-liver-disease-cause-or-effect-of-metabolic-syndrome
#16
REVIEW
Christoph Grander, Felix Grabherr, Alexander R Moschen, Herbert Tilg
Non-alcoholic fatty liver disease (NAFLD) is the most common liver disease throughout the world. Pathophysiological insights into this disease have recently illustrated that various factors such as insulin resistance, innate immunity, metabolic inflammation, and the microbiota are of relevance. NAFLD, metabolic syndrome (MS), and type 2 diabetes (T2D) share many pathophysiological aspects, and inflammatory processes in the adipose tissue, gut, and liver have evolved to be of exceptional importance. Most of NAFLD patients are obese and encounter a high risk of developing MS and T2D...
October 2016: Visceral Medicine
https://www.readbyqxmd.com/read/27921043/metabolic-vascular-syndrome-new-insights-into-a-multidimensional-network-of-risk-factors-and-diseases
#17
REVIEW
Gerhard H Scholz, Markolf Hanefeld
BACKGROUND: Since 1981, we have used the term metabolic syndrome to describe an association of a dysregulation in lipid metabolism (high triglycerides, low high-density lipoprotein cholesterol, disturbed glucose homeostasis (enhanced fasting and/or prandial glucose), gout, and hypertension), with android obesity being based on a common soil (overnutrition, reduced physical activity, sociocultural factors, and genetic predisposition). We hypothesized that main traits of the syndrome occur early and are tightly connected with hyperinsulinemia/insulin resistance, procoagulation, and cardiovascular diseases...
October 2016: Visceral Medicine
https://www.readbyqxmd.com/read/27920819/co-administration-of-metformin-and-n-acetylcysteine-with-dietary-control-improves-the-biochemical-and-histological-manifestations-in-rats-with-non-alcoholic-fatty-liver
#18
Naglaa Mohamed El-Lakkany, Sayed Hassan Seif El-Din, Abdel-Nasser Abdel-Aal Sabra, Olfat Ali Hammam, Fatma Abdel-Latif Ebeid
Non-alcoholic fatty liver disease (NAFLD) is a burgeoning health problem that affects 1/3 of the adult population and an increasing number of children in developed countries. Oxidative stress and insulin resistance are the mechanisms that seem to be mostly involved in its pathogenesis. This study was conceived in a NAFLD rat model to evaluate the efficacy of both metformin (MTF) and N-acetylcysteine (NAC) with dietary control on biochemical and histologic liver manifestations. Rats were classified into nine groups; normal (I), NAFLD-induced by feeding high-fat diet (HFD; II) for 12 weeks, NAFLD switched to regular diet (RD; III), NAFLD-HFD or -RD treated with MTF in a dose of 150 mg/kg (IV, V), NAC in a dose of 500 mg/kg (VI, VII) or MTF+NAC (VIII, IX) respectively for 8 weeks...
October 2016: Research in Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27920470/nonalcoholic-fatty-liver-disease-a-multisystem-disease
#19
REVIEW
Ivana Mikolasevic, Sandra Milic, Tamara Turk Wensveen, Ivana Grgic, Ivan Jakopcic, Davor Stimac, Felix Wensveen, Lidija Orlic
Non-alcoholic fatty liver disease (NAFLD) is one of the most common comorbidities associated with overweight and metabolic syndrome (MetS). Importantly, NAFLD is one of its most dangerous complications because it can lead to severe liver pathologies, including fibrosis, cirrhosis and hepatic cellular carcinoma. Given the increasing worldwide prevalence of obesity, NAFLD has become the most common cause of chronic liver disease and therefore is a major global health problem. Currently, NAFLD is predominantly regarded as a hepatic manifestation of MetS...
November 21, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27920123/selective-enhancement-of-insulin-sensitivity-in-the-endothelium-in-vivo-reveals-a-novel-proatherosclerotic-signalling-loop
#20
Hema Viswambharan, Nadira Y Yuldasheva, Anshuman Sengupta, Helen Imrie, Matthew C Gage, Natalie J Haywood, Andrew M Walker, Anna Skromna, Natalia Makova, Stacey L Galloway, Pooja Shah, Piruthivi Sukumar, Karen E Porter, Peter J Grant, Ajay M Shah, Celio X Santos, Jing Li, David J Beech, Stephen Wheatcroft, Richard M Cubbon, Mark T Kearney
RATIONALE: In the endothelium, insulin stimulates endothelial nitric oxide synthase (eNOS) to generate the anti-atherosclerotic signalling radical NO. Insulin resistant type 2 diabetes is associated with reduced NO availability and accelerated atherosclerosis. The effect of enhancing endothelial insulin sensitivity on NO availability is unclear. OBJECTIVE: To answer this question we generated a mouse with endothelial cell (EC)-specific over-expression of the human insulin receptor (hIRECO) using the Tie2 promoter-enhancer...
December 5, 2016: Circulation Research
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