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https://www.readbyqxmd.com/read/28721439/effects-of-insulin-and-exercise-training-on-fgf21-its-receptors-and-target-genes-in-obesity-and-type-2-diabetes
#1
Rikke Kruse, Sara G Vienberg, Birgitte F Vind, Birgitte Andersen, Kurt Højlund
AIMS/HYPOTHESIS: Pharmacological doses of FGF21 improve glucose tolerance, lipid metabolism and energy expenditure in rodents. Induced expression and secretion of FGF21 from muscle may increase browning of white adipose tissue (WAT) in a myokine-like manner. Recent studies have reported that insulin and exercise increase FGF21 in plasma. Obesity and type 2 diabetes are potentially FGF21-resistant states, but to what extent FGF21 responses to insulin and exercise training are preserved, and whether FGF21, its receptors and target genes are altered, remains to be established...
July 18, 2017: Diabetologia
https://www.readbyqxmd.com/read/28721400/weight-adjusted-lean-body-mass-and-calf-circumference-are-protective-against-obesity-associated-insulin-resistance-and-metabolic-abnormalities
#2
Toshinari Takamura, Yuki Kita, Masatoshi Nakagen, Masaru Sakurai, Yuki Isobe, Yumie Takeshita, Kohzo Kawai, Takeshi Urabe, Shuichi Kaneko
BACKGROUND: To test the hypothesis that preserved muscle mass is protective against obesity-associated insulin resistance and metabolic abnormalities, we analyzed the relationship of lean body mass and computed tomography-assessed sectional areas of specific skeletal muscles with insulin resistance and metabolic abnormalities in a healthy cohort. METHODS: A total of 195 subjects without diabetes who had completed a medical examination were included in this study...
July 2017: Heliyon
https://www.readbyqxmd.com/read/28704522/assessment-of-gut-microbiota-populations-in-lean-and-obese-zucker-rats
#3
Reza Hakkak, Soheila Korourian, Steven L Foley, Bruce D Erickson
Obesity has been on the rise in the US and worldwide for the last several decades. Obesity has been associated with chronic disease development, such as certain types of cancer, type 2 diabetes, cardiovascular disease, and liver diseases. Previously, we reported that obesity promotes DMBA-induced mammary tumor development using the obese Zucker rat model. The intestinal microbiota is composed of a diverse population of obligate and facultative anaerobic microorganisms, and these organisms carry out a broad range of metabolic activities...
2017: PloS One
https://www.readbyqxmd.com/read/28704429/effects-of-coconut-oil-on-glycemia-inflammation-and-urogenital-microbial-parameters-in-female-ossabaw-mini-pigs
#4
Annie E Newell-Fugate, Katherine Lenz, Cassandra Skenandore, Romana A Nowak, Bryan A White, Andrea Braundmeier-Fleming
Forty percent of American women are obese and at risk for type II diabetes, impaired immune function, and altered microbiome diversity, thus impacting overall health. We investigated whether obesity induced by an excess calorie, high fat diet containing hydrogenated fats, fructose, and coconut oil (HFD) altered glucose homeostasis, peripheral immunity, and urogenital microbial dynamics. We hypothesized that HFD would cause hyperglycemia, increase peripheral inflammation, and alter urogenital microbiota to favor bacterial taxonomy associated with inflammation...
2017: PloS One
https://www.readbyqxmd.com/read/28690023/the-tyg-index-as-a-marker-of-subclinical-atherosclerosis-and-arterial-stiffness-in-lean-and-overweight-postmenopausal-women
#5
Irene Lambrinoudaki, Maria Vasiliki Kazani, Eleni Armeni, Georgios Georgiopoulos, Konstantinos Tampakis, Demetrios Rizos, Areti Augoulea, Georgios Kaparos, Andreas Alexandrou, Kimon Stamatelopoulos
BACKGROUND: The present study aims to examine the association of the metabolic syndrome (MS) as well as of the triglyceride-glucose index (TyG-Index), a novel marker of insulin resistance, with subclinical atherosclerosis in a cohort of postmenopausal women, stratified according to their body mass index. METHODS: A total of 473 informed-consenting, non-diabetic postmenopausal women, without overt cardiovascular disease, were included in this study. We aimed to compare the association between structural and functional indices of subclinical atherosclerosis (i...
June 16, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28687542/skeletal-muscle-microvascular-linked-improvements-in-glycemic-control-from-resistance-training-in-individuals-with-type-2-diabetes
#6
Ryan D Russell, Donghua Hu, Timothy Greenaway, Sarah J Blackwood, Renee M Dwyer, James E Sharman, Graeme Jones, Kathryn A Squibb, Aascha A Brown, Petr Otahal, Meg Boman, Hayder Al-Aubaidy, Dino Premilovac, Christian K Roberts, Samuel Hitchins, Stephen M Richards, Stephen Rattigan, Michelle A Keske
OBJECTIVE: Insulin increases glucose disposal in part by enhancing microvascular blood flow (MBF) and substrate delivery to myocytes. Insulin's microvascular action is impaired with insulin resistance and type 2 diabetes. Resistance training (RT) improves glycemic control and insulin sensitivity, but whether this improvement is linked to augmented skeletal muscle microvascular responses in type 2 diabetes is unknown. RESEARCH DESIGN AND METHODS: Seventeen (11 male and 6 female; 52 ± 2 years old) sedentary patients with type 2 diabetes underwent 6 weeks of whole-body RT...
July 7, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28686669/obesity-type-ii-diabetes-alters-macrophage-polarization-resulting-in-a-fibrotic-tendon-healing-response
#7
Jessica E Ackerman, Michael B Geary, Caitlin A Orner, Fatima Bawany, Alayna E Loiselle
Type II Diabetes (T2DM) dramatically impairs the tendon healing response, resulting in decreased collagen organization and mechanics relative to non-diabetic tendons. Despite this burden, there remains a paucity of information regarding the mechanisms that govern impaired healing of diabetic tendons. Mice were placed on either a high fat diet (T2DM) or low fat diet (lean) and underwent flexor tendon transection and repair surgery. Healing was assessed via mechanical testing, histology and changes in gene expression associated with collagen synthesis, matrix remodeling, and macrophage polarization...
2017: PloS One
https://www.readbyqxmd.com/read/28684122/potent-antiobesity-effect-of-a-short-length-peptide-yy-analogue-continuously-administered-in-mice
#8
Naoki Nishizawa, Ayumu Niida, Yusuke Adachi, Yasushi Masuda, Satoshi Kumano, Kotaro Yokoyama, Tomoko Asakawa, Hideki Hirabayashi, Nobuyuki Amano, Shiro Takekawa, Tetsuya Ohtaki, Taiji Asami
The gastrointestinal peptide, peptide YY3-36 (PYY3-36) and its shorter peptide analogues have been reported to reduce appetite by activating the neuropeptide Y2 receptor (Y2R), which is associated with obesity and other metabolic diseases. A 14-amino acid PYY analogue, Ac-[d-Pro(24),Cha(27,28,36),Aib(31)]PYY(23-36) (3), showed high binding affinity and agonist activity for the Y2R, similar to that of PYY3-36, but had weak anorectic activity upon continuous administration in lean mice. Three amino acid substitutions [Pya(4)(26), Aib(28), Lys(30)], which contributed to the decreased hydrophobicity of 3, efficiently increased its anorectic activity...
June 23, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28683241/insulin-resistance-and-polycystic-ovary-syndrome-in-a-chinese-population
#9
Chen Chen, Gao Jing, Zhou Li, Shi Juan, Cui Bin, Hong Jie
OBJECTIVE: Our study aimed to investigate glucose and lipid level as well as insulin resistance (IR) in patients with polycystic ovary syndrome (PCOS). METHODS: In a case-control study, 426 patients with PCOS were diagnosed according to Rotterdam criteria, and they were conducted in the morning after a 10-h fast. Participants received standard 75-g oral glucose tolerance test (OGTT). Plasma glucose and insulin levels were obtained at 0, 30, 60, 120, and 180 min...
July 6, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28679946/independent-tissue-contributors-to-obesity-associated-insulin-resistance
#10
Yvo Ham Kusters, Casper G Schalkwijk, Alfons Jhm Houben, M Eline Kooi, Lucas Lindeboom, Jos Op 't Roodt, Peter J Joris, Jogchum Plat, Ronald P Mensink, Eugene J Barrett, Coen DA Stehouwer
BACKGROUND: Induction of insulin resistance is a key pathway through which obesity increases risk of type 2 diabetes, hypertension, dyslipidemia, and cardiovascular events. Although the detrimental effects of obesity on insulin sensitivity are incompletely understood, accumulation of visceral, subcutaneous, and liver fat and impairment of insulin-induced muscle microvascular recruitment (MVR) may be involved. As these phenotypic changes often coincide in obesity, we aimed to unravel whether they independently contribute to insulin resistance and thus constitute separate targets for intervention...
July 6, 2017: JCI Insight
https://www.readbyqxmd.com/read/28678424/the-metabolic-syndrome-alters-the-mirna-signature-of-porcine-adipose-tissue-derived-mesenchymal-stem-cells
#11
Yu Meng, Alfonso Eirin, Xiang-Yang Zhu, Hui Tang, Pritha Chanana, Amir Lerman, Andre J Van Wijnen, Lilach O Lerman
Autologous transplantation of mesenchymal stem cells (MSCs) is a viable option for the treatment of several diseases. Evidence indicates that MSCs release extracellular vesicles (EVs) and that EVs shuttle miRNAs to damaged parenchymal cells to activate an endogenous repair program. We hypothesize that comorbidities may interfere with the packaging of cargo in MSC-derived EVs. Therefore, we examined whether metabolic syndrome (MetS) modulates the miRNA content packed within MSC-derived EVs. MSCs were collected from swine abdominal adipose tissue after 16 weeks of lean or obese diet (n = 7 each)...
July 5, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28673384/testosterone-therapy-of-men-with-type-2-diabetes-mellitus-a-randomized-double-blinded-placebo-controlled-study
#12
Line Velling Magnussen
The prevalence of chronic diseases including obesity and type 2 diabetes mellitus (T2D) are increasing. The usage of testosterone replacement therapy (TRT) has escalated in the Western countries during the past decades especially in aging men without clear organic indication for TRT although the safety of long-term TRT has not been clarified regarding the risk of cardiovascular disease (CVD). Aging men with T2D have an increased risk of CVD and these patients are often characterized by lowered T-levels, ectopic fat depots, a deranged adipokine profile with e...
July 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28663372/muscle-hypertrophy-in-pre-diabetic-men-after-sixteen-weeks-of-resistance-training
#13
Charles A Stuart, Michelle L Lee, Mark A South, Mary E A Howell, Michael H Stone
Resistance training of healthy young men typically results in muscle hypertrophy and a shift in vastus lateralis composition away from type IIx fibers to an increase in IIa fiber content. Our previous studies of eight weeks of resistance training found many metabolic syndrome men and women paradoxically increased IIx fibers with a decrease in IIa fibers. To confirm the hypothesis that obese subjects might have muscle remodeling after resistance training very different from healthy lean subjects, we subjected a group of nine obese men volunteers to progressive resistance training for a total of sixteen weeks...
June 29, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28661198/metabolic-regulation-of-adipose-tissue-macrophage-atm-function-in-obesity-and-diabetes
#14
Mahesh Appari, Keith M Channon, Eileen McNeill
SIGNIFICANCE: Obesity and diabetes are associated with chronic activation of inflammatory pathways that are important mechanistic links between insulin resistance (IR), type 2 diabetes (T2D) and cardiovascular disease pathogenesis. The development of these metabolic diseases is associated with changes in the both the number and phenotype of adipose tissue macrophages. Emerging lines of evidence have shown that adipose tissue macrophages (ATM) release pro-inflammatory cytokines similar to classically-activated M1 macrophages, that directly contribute to IR or T2D...
June 29, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28653652/obesity-and-age-related-alterations-in-fat-cd36-translocation-and-lipin-1-subcellular-localization-in-skeletal-muscle-of-the-zucker-rats
#15
Snjezana Romic, Katarina Krskova, Rafal Olszanecki, Lucia Balazova, Viktoria Lory, Goran Koricanac, Miroslava Slamkova, Stefan Zorad
Fatty acid (FA) uptake and/or intramuscular triglyceride (TG) accumulation in skeletal muscle are increased in obesity, type 2 diabetes and aging. FA translocase (FAT/CD36) translocation, lipin-1 subcellular localization and nuclear factor κB (NF-κB) p65 protein content in quadriceps muscle of young and old obese Zucker fa/fa rats and their lean controls were analyzed by immunoblot to define obesity- and aging-related alterations in FA uptake, their subsequent metabolic fate and potential to activate pro-inflammatory signaling...
June 27, 2017: General Physiology and Biophysics
https://www.readbyqxmd.com/read/28651327/alpha-klotho-and-fibroblast-growth-factor-23-among-alcoholics
#16
Geraldine Quintero-Platt, Emilio González-Reimers, Melchor Rodríguez-Gaspar, Candelaria Martín-González, Onán Pérez-Hernández, Lucía Romero-Acevedo, Elisa Espelosín-Ortega, María José de la Vega-Prieto, Francisco Santolaria-Fernández
Aims: Alcoholism may be a cardiovascular risk factor. Osteocyte derived molecules such as fibroblast growth factor 23 (FGF-23) and soluble α Klotho have recently been associated with cardiovascular disease, but their role in alcoholics is unknown. We here analyze the behavior of FGF23 and α Klotho in alcoholics. Methods: Ninety-seven alcoholic patients were assessed for liver function, presence of hypertension, diabetes, atrial fibrillation, left ventricular hypertrophy (LVH), vascular calcifications (assessed by chest X-ray) and nutritional status (lean and fat mass measured by densitometry)...
June 23, 2017: Alcohol and Alcoholism: International Journal of the Medical Council on Alcoholism
https://www.readbyqxmd.com/read/28641779/macrophage-functions-in-lean-and-obese-adipose-tissue
#17
REVIEW
Dylan Thomas, Caroline Apovian
Interactions between macrophages and adipocytes influence both metabolism and inflammation. Obesity-induced changes to macrophages and adipocytes lead to chronic inflammation and insulin resistance. This paper reviews the various functions of macrophages in lean and obese adipose tissue and how obesity alters adipose tissue macrophage phenotypes. Metabolic disease and insulin resistance shift the balance between numerous pro- and anti-inflammatory regulators of macrophages and create a feed-forward loop of increasing inflammatory macrophage activation and worsening adipocyte dysfunction...
July 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28641285/role-of-glycyrrhizin-in-the-reduction-of-inflammation-in-diabetic-kidney-disease
#18
Vikram Thakur, Syeda Nargis, Mayra Gonzalez, Swetak Pradhan, Daniel Terreros, Munmun Chattopadhyay
BACKGROUND: Diabetic kidney disease (DKD) is one of the most debilitating complications of type 2 diabetes. Recent evidence suggests chronic inflammation to be one of the causal factors of DKD. The mechanisms entailed are not completely elucidated except that a variety of cytokines play a major role in this process. High mobility group box 1 (HMGB1) is a pro-inflammatory toll-like receptor-4 (TLR4)-binding cytokine that is involved in inflammation-associated gene expression. This investigation was designed to assess the involvement of HMGB1, TLR-4, and nuclear factor (NF)-κB in the development of DKD and to evaluate that whether blocking HMGB1 by its natural inhibitor Glycyrrhizin (GLC) can reduce the progression of the disease...
June 23, 2017: Nephron
https://www.readbyqxmd.com/read/28632748/trimetazidine-therapy-for-diabetic-mouse-hearts-subjected-to-ex-vivo-acute-heart-failure
#19
Emilene Breedt, Lydia Lacerda, M Faadiel Essop
Acute heart failure (AHF) is the most common primary diagnosis for hospitalized heart diseases in Africa. As increased fatty acid β-oxidation (FAO) during heart failure triggers detrimental effects on the myocardium, we hypothesized that trimetazidine (TMZ) (partial FAO inhibitor) offers cardioprotection under normal and obese-related diabetic conditions. Hearts were isolated from 12-14-week-old obese male and female diabetic (db/db) mice versus lean non-diabetic littermates (db/+) controls. The Langendorff retrograde isolated heart perfusion system was employed to establish an ex vivo AHF model: a) Stabilization phase-Krebs Henseleit buffer (10 mM glucose) at 100 mmHg (25 min); b) Critical Acute Heart Failure (CAHF) phase-(1...
2017: PloS One
https://www.readbyqxmd.com/read/28631813/high-fat-diet-attenuates-hyperglycemia-body-composition-changes-and-bone-loss-in-male-streptozotocin-induced-type-1-diabetic-mice
#20
Adriana Lelis Carvalho, Victoria E DeMambro, Anyonya R Guntur, Phuong Le, Kenichi Nagano, Roland Baron, Francisco José Albuquerque de Paula, Katherine J Motyl
There is a growing and alarming prevalence of obesity and the metabolic syndrome in type I diabetic patients (T1DM), particularly in adolescence. In general, low bone mass, higher fracture risk and increased marrow adipose tissue (MAT) are features of diabetic osteopathy in insulin deficient subjects. On the other hand, type 2 diabetes (T2DM) is associated with normal or high bone mass, a greater risk of peripheral fractures and no change in MAT. Therefore, we sought to determine the effect of weight gain on bone turnover in insulin deficient mice...
June 20, 2017: Journal of Cellular Physiology
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