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Muscle insulin resistance

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https://www.readbyqxmd.com/read/29053582/zinc-supplementation-improves-glucose-homeostasis-in-high-fat-fed-mice-by-enhancing-pancreatic-%C3%AE-cell-function
#1
Vinícius Cooper-Capetini, Diogo Antonio Alves de Vasconcelos, Amanda Roque Martins, Sandro Massao Hirabara, José Donato, Angelo Rafael Carpinelli, Fernando Abdulkader
Zinc is an essential component of the insulin granule and it possibly modulates insulin secretion and signaling. Since insulin resistance is a hallmark in the development of type 2 diabetes mellitus, this study aimed at investigating if zinc supplementation is able to improve glucose tolerance and β-cell function in a model of insulin resistance. Male C57BL/6 mice were distributed in four groups according to the diet: normal fat (NF); normal fat supplemented with ZnCl₂ (NFZ); high-fat (HF); and, high-fat chow supplemented with ZnCl₂ (HFZ)...
October 20, 2017: Nutrients
https://www.readbyqxmd.com/read/29051733/system-pharmacology-based-dissection-of-the-synergistic-mechanism-of-huangqi-and-huanglian-for-diabetes-mellitus
#2
Shi-Jun Yue, Juan Liu, Wu-Wen Feng, Fei-Long Zhang, Jian-Xin Chen, Lan-Ting Xin, Cheng Peng, Hua-Shi Guan, Chang-Yun Wang, Dan Yan
The rapidly increasing diabetes mellitus (DM) is becoming a major global public health issue. Traditional Chinese medicine (TCM) has a long history of the treatment of DM with good efficacy. Huangqi and Huanglian are one of the most frequently prescribed herbs for DM, and the combination of them occurs frequently in antidiabetic formulae. However, the synergistic mechanism of Huangqi (Radix Astragali) and Huanglian (Rhizoma Coptidis) has not been clearly elucidated. To address this problem, a feasible system pharmacology model based on chemical, pharmacokinetic and pharmacological data was developed via network construction approach to clarify the synergistic mechanisms of these two herbs...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29050941/mahanine-enhances-the-glucose-lowering-mechanisms-in-skeletal-muscle-and-adipocyte-cells
#3
Nattakarn Nooron, Anan Athipornchai, Apichart Suksamrarn, Anchalee Chiabchalard
Insulin resistance is a major defect underlying type 2 diabetes development. Skeletal muscle tissue and adipocyte tissue are the major sites of postprandial glucose disposal, and enhancing glucose uptake into this tissue may decrease insulin resistance in type 2 diabetes patients. Mahanine (3,11-dihydro-3,5-dimethyl-3-(4-methyl-3-pentenyl)pyrano[3,2-a]carbazol-9-ol) has been reported to be a major bioactive carbazole alkaloid that has many biological activities including antitumor, anti-inflammatory, antioxidant and anti-diabetic activities...
October 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29050221/pdgfra-hsd17b4-and-hmgb2-are-potential-therapeutic-targets-in-polycystic-ovarian-syndrome-and-breast-cancer
#4
Huiyu Xu, Yong Han, Jiaying Lou, Hongxian Zhang, Yue Zhao, Balázs Győrffy, Rong Li
To explore the key genes associated with both PCOS and breast cancer, we overlapped the synchronously differently expressed genes in two obese insulin-resistant GEO datasets in muscle tissue and genes exert essential roles in breast cancer prognosis together base on the following reasons: (1) Androgens excess is believed to contribute to the onset of both PCOS and breast cancer. (2) PCOS is usually complicated with metabolic symptoms, such as obesity and insulin-resistance. (3) Muscle is the main place where energy metabolism and material metabolism take place...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29046729/long-term-feeding-of-high-fat-plus-high-fructose-diet-induces-isolated-impaired-glucose-tolerance-and-skeletal-muscle-insulin-resistance-in-miniature-pigs
#5
Meng-Chieh Hsu, Mu-En Wang, Yi-Fan Jiang, Hung-Chang Liu, Yi-Chen Chen, Chih-Hsien Chiu
BACKGROUND: During the prediabetic development, the changes in β-cell function and tissue-specific insulin resistance have been described. However, there are conflicting views in insulin secretory capacity between early clinical observation and recent proposed mathematical model. On the basis of digestive and metabolic similarities with humans, swine have great potential as an animal model to investigate the progressive mechanisms of prediabetes. The aim of this study was to investigate the insulin secretory response and tissue-specific insulin resistance in a dietary-induced prediabetic porcine model...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/29046313/dicarbonyl-stress-and-glyoxalase-enzymatic-system-regulation-in-human-skeletal-muscle
#6
Jacob T Mey, Brian K Blackburn, Edwin R Miranda, Alec B Chaves, Joan Briller, Marcelo G Bonini, Jacob M Haus
Skeletal muscle insulin resistance is a hallmark of Type II Diabetes (T2DM) and may be exacerbated by protein modifications by methylglyoxal (MG), known as dicarbonyl stress. The glyoxalase enzyme system composed of glyoxalase 1/2 (GLO1/GLO2) is the natural defense against dicarbonyl stress, yet its protein expression, activity and regulation remain largely unexplored in skeletal muscle. Therefore, this study investigated dicarbonyl stress and the glyoxalase enzyme system in the skeletal muscle of subjects with T2DM (age: 56 ± 5 yrs; BMI: 32 ± 2 kg/m(2)) compared to lean healthy control subjects (LHC; age: 27 ± 1 yrs; BMI: 22 ± 1 kg/m(2))...
October 18, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29043214/vitamin-a-improves-hyperglycemia-and-glucose-intolerance-through-regulation-of-intracellular-signaling-pathways-and-glycogen-synthesis-in-wnin-gr-ob-obese-rat-model
#7
Shanmugam M Jeyakumar, Alex Sheril, Ayyalasomayajula Vajreswari
Vitamin A and its metabolites modulate insulin resistance and regulate stearoyl-CoA desaturase 1 (SCD1), which are also known to affect insulin resistance. Here, we tested, whether vitamin A-mediated changes in insulin resistance markers are associated with SCD1 regulation or not. For this purpose, 30-week old male lean and glucose-intolerant obese rats of WNIN/GR-Ob strain were given either a stock or vitamin A-enriched diet, i.e. 2.6 mg or 129 mg vitamin A/kg diet, for 14 weeks. Compared to the stock diet, vitamin A-enriched diet feeding improved hyperglycemia and glucose-clearance rate in obese rats and no such changes were seen in lean rats receiving identical diets...
September 2017: Preventive Nutrition and Food Science
https://www.readbyqxmd.com/read/29043068/meta-fibrosis-links-positive-energy-balance-and-mitochondrial-metabolism-to-insulin-resistance
#8
REVIEW
Daniel S Lark, David H Wasserman
Obesity and insulin resistance often emerge from positive energy balance and generally are linked to low-grade inflammation. This low-grade inflammation has been called "meta-inflammation" because it is a consequence of the metabolic dysregulation that can accompany overnutrition. One means by which meta-inflammation is linked to insulin resistance is extracellular matrix expansion secondary to meta-inflammation, which we define here as "meta-fibrosis". The significance of meta-fibrosis is that it reflects a situation in which the extracellular matrix functions as a multi-level integrator of local (for example, mitochondrial reactive oxygen species production) and systemic (for example, inflammation) inputs that couple to cellular processes creating insulin resistance...
2017: F1000Research
https://www.readbyqxmd.com/read/29040964/polymorphisms-in-adrenergic-receptor-genes-in-qinchuan-cattle-show-associations-with-selected-carcass-traits
#9
Chu-Gang Mei, Lin-Sheng Gui, Hong-Cheng Wang, Wan-Qiang Tian, Yao-Kun Li, Lin-Sen Zan
The beta-adrenergic receptors coded by the ADRB1, ADRB2 and ADRB3 genes play important roles in mediating metabolic effects, especially lipolysis, insulin resistance and energy balance. This study investigated the expression levels of these three genes in different tissues of Qinchuan cattle by real-time polymerase chain reaction (RT-PCR). Expressed levels of RNA from the ADRB2 gene were generally much higher than for ADRB1 and ADRB3. ADRB1 and ADRB2 expression levels were highest in subcutaneous fat and lower in muscle, whereas ADRB3 expression was higher in muscle tissue...
October 12, 2017: Meat Science
https://www.readbyqxmd.com/read/29039450/insulin-restores-ucp3-activity-and-decreases-energy-surfeit-to-alleviate-lipotoxicity-in-skeletal-muscle
#10
Wenjuan Tang, Sunyinyan Tang, Hongdong Wang, Zhijuan Ge, Dalong Zhu, Yan Bi
An early insulin regimen ameliorates glucotoxicity but also lipotoxicity in type 2 diabetes; however, the underlying mechanism remains elusive. In the present study, we investigated the role of mitochondria in lipid regulation following early insulin administration in insulin-resistant skeletal muscle cells. Male C57BL/6 mice, fed a high-fat diet (HFD) for 8 weeks, were treated with insulin for 3 weeks, and L6 myotubes cultured with palmitate (PA) for 24 h were incubated with insulin for another 12 h. The results showed that insulin facilitated systemic glucose disposal and attenuated muscular triglyceride accumulation in vivo...
October 2, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29038315/adiposity-dysmetabolic-traits-and-earlier-onset-of-female-puberty-in-adolescent-offspring-of-women-with-gestational-diabetes-mellitus-a-clinical-study-within-the-danish-national-birth-cohort
#11
Louise G Grunnet, Susanne Hansen, Line Hjort, Camilla M Madsen, Freja B Kampmann, Anne Cathrine B Thuesen, Charlotta Granstrømi, Marin Strøm, Ekaterina Maslova, Ruth Frikke-Schmidt, Peter Damm, Jorge E Chavarro, Frank B Hu, Sjurdur F Olsen, Allan Vaag
OBJECTIVE: Offspring of pregnancies affected by gestational diabetes mellitus (GDM) are at increased risk of the development of type 2 diabetes. However, the extent to which these dysmetabolic traits may be due to offspring and/or maternal adiposity is unknown. We examined body composition and associated cardiometabolic traits in 561 9- to 16-year-old offspring of mothers with GDM and 597 control offspring. RESEARCH DESIGN AND METHODS: We measured anthropometric characteristics; puberty status; blood pressure; and fasting glucose, insulin, C-peptide, and lipids levels; and conducted a DEXA scan in a subset of the cohort...
October 16, 2017: Diabetes Care
https://www.readbyqxmd.com/read/29037268/probiotics-prebiotics-synbiotics-and-insulin-sensitivity
#12
Y A Kim, J B Keogh, P M Clifton
Animal studies indicate that the composition of gut microbiota may be involved in the progression of insulin resistance to type 2 diabetes. Probiotics and/or prebiotics could be a promising approach to improve insulin sensitivity by favourably modifying the composition of the gut microbial community, reducing intestinal endotoxin concentrations and decreasing energy harvest. The aim of the present review was to investigate the effects of probiotics, prebiotics and synbiotics (a combination of probiotics and prebiotics) on insulin resistance in human clinical trials and to discuss the potential mechanisms whereby probiotics and prebiotics improve glucose metabolism...
October 17, 2017: Nutrition Research Reviews
https://www.readbyqxmd.com/read/29036763/effect-of-treadmill-exercise-on-skeletal-muscle-autophagy-in-rats-with-obesity-induced-by-a-high-fat-diet
#13
Do Keun Cho, Dong Hun Choi, Joon Yong Cho
PURPOSE: This study aimed to investigate the effects of treadmill exercise on body weight, blood biochemistry, and autophagy. METHODS: Triglyceride, total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, insulin, and glucose levels were measured, the Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) score was calculated, and the soleus muscle was analyzed for autophagy-related factors (Beclin-1, p62, LC3, Lamp-2) in rats with obesity induced by a high-fat diet...
September 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/29035695/expression-of-macrophage-genes-within-skeletal-muscle-correlates-inversely-with-adiposity-and-insulin-resistance-in-humans
#14
Dongmei Liu, Flor Elisa Morales, Heidi B IglayReger, Mary K Treutelaar, Amy E Rothberg, Monica J Hubal, Evan P Nadler, Jacques Robidoux, Hisham Barakat, Jeffrey F Horowitz, Eric P Hoffman, Charles F Burant, Paul M Gordon
Background Local inflammation in obese adipose tissue has been shown to contribute to insulin resistance, however, the role of macrophage infiltration within skeletal muscle is still debateable. This study aimed to evaluate the association of skeletal muscle macrophage gene expression with adiposity levels and insulin sensitivity in obese patients. Methods Twenty-two non-diabetic obese patients and 23 healthy lean controls were included. Obese patients underwent a 3-month weight loss intervention. Macrophage gene expression in skeletal muscle (quantitative RT-PCR), body composition (DXA) and insulin sensitivity (homeostatic model assessment and oral glucose tolerance test) were compared between groups and their associations were analyzed...
October 16, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29034006/canagliflozin-reduces-epicardial-fat-in-patients-with-type-2-diabetes-mellitus
#15
Shusuke Yagi, Yukina Hirata, Takayuki Ise, Kenya Kusunose, Hirotsugu Yamada, Daiju Fukuda, Hotimah Masdan Salim, Gulinu Maimaituxun, Susumu Nishio, Yuriko Takagawa, Saori Hama, Tomomi Matsuura, Koji Yamaguchi, Takeshi Tobiume, Takeshi Soeki, Tetsuzo Wakatsuki, Ken-Ichi Aihara, Masashi Akaike, Michio Shimabukuro, Masataka Sata
BACKGROUND: It is unknown whether canagliflozin, a selective sodium glucose co-transporter 2 inhibitor, reduces epicardial adipose tissue (EAT) thickness, which is associated with insulin resistance and is a risk factor for coronary artery disease. METHODS AND RESULTS: We administered 100 mg of canagliflozin for 6 months to 13 patients with type 2 diabetes mellitus. We evaluated glycemic control, visceral adipose tissue (VAT) area and subcutaneous adipose tissue (SAT) area, and skeletal muscle mass by using impedance methods, and EAT thickness by using echocardiography...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/29030163/metabolites-related-to-renal-function-immune-activation-and-carbamylation-are-associated-with-muscle-composition-in-older-adults
#16
Michael S Lustgarten, Roger A Fielding
Reduced skeletal muscle density in older adults is associated with insulin resistance, decreased physical function, and an increased all-cause mortality risk. To elucidate mechanisms that may underlie the maintenance of skeletal muscle density, we conducted a secondary analysis of previously published muscle composition and serum metabolomic data in 73 older adults (average age, 78y). Multivariable-adjusted linear regression was used to examine associations between 321 metabolites with muscle composition, defined as the ratio between normal density (NDM) with low density (LDM) thigh muscle cross sectional area (NDM/LDM)...
October 10, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29029225/glucocorticoid-signaling-in-health-and-disease-insights-from-tissue-specific-gr-knockout-mice
#17
Shannon Whirledge, Donald B DeFranco
Glucocorticoids are adrenally produced hormones critically involved in development, general physiology, and control of inflammation. Since their discovery, glucocorticoids have been widely utilized to treat a variety of inflammatory conditions. However, high doses or prolonged use leads to a number of side-effects throughout the body, which preclude their clinical utility. The primary actions of glucocorticoids are mediated by the glucocorticoid receptor (GR), a transcription factor that regulates many complex signaling pathways...
October 5, 2017: Endocrinology
https://www.readbyqxmd.com/read/29028203/an-information-theoretical-analysis-of-human-insulin-glucose-system-towards-the-internet-of-bio-nano-things
#18
Naveed A Abbasi, Ozgur B Akan
Molecular communication is an important tool to understand biological communications with many promising applications in Internet of Bio-Nano Things (IoBNT). The insulinglucose system is of key significance among the major intrabody nanonetworks since it fulfills metabolic requirements of the body. Study of biological networks from information and communication theoretical (ICT) perspective is necessary for their introduction in the IoBNT framework. Therefore, the objective of this work is to provide and analyze for the first time in literature, a simple molecular communication model of the human insulin-glucose system from ICT perspective...
October 11, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/29026446/dna-methylation-links-genetics-fetal-environment-and-an-unhealthy-lifestyle-to-the-development-of-type-2-diabetes
#19
REVIEW
Emma Nilsson, Charlotte Ling
Type 2 diabetes is a complex trait with both environmental and hereditary factors contributing to the overall pathogenesis. One link between genes, environment, and disease is epigenetics influencing gene transcription and, consequently, organ function. Genome-wide studies have shown altered DNA methylation in tissues important for glucose homeostasis including pancreas, liver, skeletal muscle, and adipose tissue from subjects with type 2 diabetes compared with nondiabetic controls. Factors predisposing for type 2 diabetes including an adverse intrauterine environment, increasing age, overweight, physical inactivity, a family history of the disease, and an unhealthy diet have all shown to affect the DNA methylation pattern in target tissues for insulin resistance in humans...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/29025199/effects-of-growth-hormone-on-glucose-metabolism-and-insulin-resistance-in-human
#20
REVIEW
Shin-Hye Kim, Mi-Jung Park
Growth hormone (GH) is important for promotion of somatic growth and the regulation of substrate metabolism. Metabolic action of GH occurs in multiple tissues including the liver, muscle, fat and pancreas either directly or indirectly through insulin-like growth factor 1. The diabetogenic action of GH has been well-described in previous in vivo studies. In this paper, we review the metabolic effects of GH on peripheral tissues focusing on glucose metabolism and insulin resistance, and discuss results from human studies on the long-term effects of GH administration on insulin resistance and hyperglycemia...
September 2017: Annals of Pediatric Endocrinology & Metabolism
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