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Muscle insulin resistance

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https://www.readbyqxmd.com/read/29453154/unique-pharmacology-of-a-novel-allosteric-agonist-sensitizer-insulin-receptor-monoclonal-antibody
#1
Simon A Hinke, Anne M Cieniewicz, Thomas Kirchner, Katharine D'Aquino, Rupesh Nanjunda, Jason Aligo, Robert Perkinson, Philip Cooper, Ken Boayke, Mark L Chiu, Steve Jarantow, Eilyn R Lacy, Yin Liang, Dana L Johnson, Jean M Whaley, Russell B Lingham, Anthony J Kihm
OBJECTIVE: Insulin resistance is a key feature of Type 2 Diabetes (T2D), and improving insulin sensitivity is important for disease management. Allosteric modulation of the insulin receptor (IR) with monoclonal antibodies (mAbs) can enhance insulin sensitivity and restore glycemic control in animal models of T2D. METHODS: A novel human mAb, IRAB-A, was identified by phage screening using competition binding and surface plasmon resonance assays with the IR extracellular domain...
February 3, 2018: Molecular Metabolism
https://www.readbyqxmd.com/read/29451713/glucose-effectiveness-is-a-critical-pathogenic-factor-leading-to-the-emergence-of-glucose-intolerance-and-type-2-diabetes-mellitus-an-ignored-hypothesis
#2
F P Alford, J E Henriksen, C Rantzau, H Beck-Nielsen
BACKGROUND: Although the ability of glucose to mediate its own in vivo metabolism is long documented, the quantitative measurement of whole body glucose-mediated glucose disposal at basal insulin levels, [glucose effectiveness (GE)], followed the introduction of the Minimal Model IVGTT technique. METHODS: A literature review, combined with our own studies, of the role of GE in glucose metabolism in normal and "at risk" individuals, was undertaken to determine GE's contribution to glucose homeostasis...
February 16, 2018: Diabetes/metabolism Research and Reviews
https://www.readbyqxmd.com/read/29449137/sex-specific-differences-in-insulin-resistance-in-type-1-diabetes-the-cacti-cohort
#3
Richard J Millstein, Laura L Pyle, Bryan C Bergman, Robert H Eckel, David M Maahs, Marian J Rewers, Irene E Schauer, Janet K Snell-Bergeon
OBJECTIVE: To test the hypothesis that multitissue deficits in insulin sensitivity are greater among women than men with type 1 diabetes compared to respective controls. RESEARCH DESIGN AND METHODS: Three-stage hyperinsulinemic-euglycemic clamps (4, 8, 40 mU/m 2 /min) were performed on 41 people with type 1 diabetes and 47 adults without diabetes (mean ± SD age 46 ± 8). Infusions of [1- 13 C]palmitate, [1,1,2,3,3- 2 H 2 ]glycerol, and [6,6- 2 H 2 ]glucose isotope tracers were used to determine free fatty acid (FFA), glycerol, and glucose kinetics in 52 of these participants (25 M and 27 W)...
January 10, 2018: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/29446746/mechanisms-involved-in-glycemic-control-promoted-by-exercise-in-diabetics
#4
Eric Francelino Andrade, Viviam de Oliveira Silva, Debora Ribeiro Orlando, Luciano Jose Pereira
Diabetes mellitus is a metabolic disease characterized by high glycemic levels for long periods. This disease has a high prevalence in the world population, being currently observed an increase in its incidence. This fact is mainly due to the sedentary lifestyle and hypercaloric diets. Non-pharmacological interventions for glycemic control include exercise, which promotes changes in skeletal muscle and adipocytes. Thus, increased glucose uptake by skeletal muscle and decreased insulin resistance through modulating adipocytes are the main factors that improve glycemic control against diabetes...
February 14, 2018: Current Diabetes Reviews
https://www.readbyqxmd.com/read/29445355/plasma-levels-of-myonectin-but-not-myostatin-or-fibroblast-derived-growth-factor-21-are-associated-with-insulin-resistance-in-adult-humans-without-diabetes-mellitus
#5
Freddy J K Toloza, Jose O Mantilla-Rivas, Maria C Pérez-Matos, Maria L Ricardo-Silgado, Martha C Morales-Alvarez, Jairo A Pinzón-Cortés, Maritza Pérez-Mayorga, Martha L Arévalo-Garcia, Giovanni Tolosa-González, Carlos O Mendivil
Background: Myokines are a group of protein mediators produced by skeletal muscle under stress or physical exertion. Even though their discovery and effects in cell culture and animal models of disease have elicited great enthusiasm, very little is known about their role in human metabolism. We assessed whether plasma concentrations of three known myokines [myonectin, myostatin, and fibroblast-derived growth factor 21 (FGF-21)] would be associated with direct and indirect indicators of insulin resistance (IR) in individuals who did not have a diagnosis of diabetes...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29443549/endurance-exercise-training-and-high-fat-diet-differentially-affect-composition-of-diacylglycerol-molecular-species-in-rat-skeletal-muscle
#6
Noriaki Kawanishi, Kana Takagi, Hyeon-Cheol Lee, Daiki Nakano, Toshiaki Okuno, Takehiko Yokomizo, Shuichi Machida
Insulin resistance of peripheral muscle is implicated in the aetiology of metabolic syndrome in obesity. Although accumulation of glycerolipids, such as triacylglycerol and diacylglycerol (DAG), in muscle contributes to insulin resistance in obese individuals, endurance-trained athletes also have higher glycerolipid levels but normal insulin sensitivity. We hypothesised that the difference in insulin sensitivity of skeletal muscle between athletes and obese individuals stems from changes in fatty acid composition of accumulated lipids...
February 14, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29443103/paradigms-of-lower-extremity-electrical-stimulation-training-after-spinal-cord-injury
#7
Ashraf S Gorgey, Refka E Khalil, Robert M Lester, Gary A Dudley, David R Gater
Skeletal muscle atrophy, increased adiposity and reduced physical activity are key changes observed after spinal cord injury (SCI) and are associated with numerous cardiometabolic health consequences. These changes are likely to increase the risk of developing chronic secondary conditions and impact the quality of life in persons with SCI. Surface neuromuscular electrical stimulation evoked resistance training (NMES-RT) was developed as a strategy to attenuate the process of skeletal muscle atrophy, decrease ectopic adiposity, improve insulin sensitivity and enhance mitochondrial capacity...
February 1, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29440695/combination-of-nutritional-polyphenols-supplementation-with-exercise-training-counteracts-insulin-resistance-and-improves-endurance-in-high-fat-diet-induced-obese-rats
#8
Karen Lambert, Marie Hokayem, Claire Thomas, Odile Fabre, Cécile Cassan, Annick Bourret, Florence Bernex, Christine Feuillet-Coudray, Cécile Notarnicola, Jacques Mercier, Antoine Avignon, Catherine Bisbal
Separately, polyphenols and exercise are known to prevent insulin resistance (IR) but their combined curative effects on established obesity and IR require further investigation. Therefore, we compared the metabolic effects of a combination of exercise and grape polyphenols supplementation in obese IR rats with high-fat diet (EXOPP) to the effect of high-fat diet alone (HF) or with a nutritional supplementation of grape polyphenols (PP) or with endurance exercise (EXO) during 8 wks. We observed an improvement of systemic and skeletal muscle insulin sensitivity in EXO and EXOPP rats...
February 13, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29440390/high-dietary-fat-and-sucrose-results-in-an-extensive-and-time-dependent-deterioration-in-health-of-multiple-physiological-systems-in-mice
#9
James G Burchfield, Melkam A Kebede, Christopher C Meoli, Jacqueline Stöckli, P Tess Whitworth, Amanda L Wright, Nolan J Hoffman, Annabel Y Minard, Xiuquan Ma, James R Krycer, Marin E Nelson, Shi-Xiong Tan, Belinda Yau, Kristen C Thomas, Natalie K Y Wee, Ee-Cheng Khor, Ronaldo F Enriquez, Bryce Vissel, Trevor J Biden, Paul A Baldock, Kyle L Hoehn, James Cantley, Gregory J Cooney, David E James, Daniel J Fazakerley
Obesity is associated with metabolic dysfunction, including insulin resistance and hyperinsulinemia, and with disorders such as cardiovascular disease, osteoporosis, and neurodegeneration. Typically, these pathologies are examined in discrete model systems and with limited temporal resolution, and whether these disorders co-occur is therefore unclear. To address this question, we examined multiple physiological systems in male C57BL/6J mice following prolonged exposure to a high-fat/high-sucrose diet (HFHSD)...
February 13, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29435395/atherothrombosis-is-a-thrombotic-not-inflammatory-disease
#10
REVIEW
Gregory D Sloop, Joseph J Weidman, John A St Cyr
The authors hypothesize that thrombosis causes both the complications of atherosclerosis as well as the underlying lesion, the atherosclerotic plaque, which develops from the organization of mural thrombi. These form in areas of slow blood flow, which develop because of flow separation created by changing vascular geometry and elevated blood viscosity. Many phenomena typically ascribed to inflammation or "chronic oxidative stress", such as the development of fatty streaks, "endothelial dysfunction," "vulnerable plaques," and the association of mild elevations of C-reactive protein and cytokines with atherothrombosis are better explained by hemorheologic and hemodynamic abnormalities, particularly elevated blood viscosity...
December 5, 2017: Curēus
https://www.readbyqxmd.com/read/29434648/hsp90%C3%AE-knockdown-in-dio-mice-reverses-insulin-resistance-and-improves-glucose-tolerance
#11
Enxuan Jing, Pragalath Sundararajan, Ishita Deb Majumdar, Suwagmani Hazarika, Samantha Fowler, Angela Szeto, Stephane Gesta, Armando J Mendez, Vivek K Vishnudas, Rangaprasad Sarangarajan, Niven R Narain
Background: Inhibition of Hsp90 has been shown to improve glucose tolerance and insulin sensitivity in mouse models of diabetes. In the present report, the specific isoform Hsp90ab1, was identified as playing a major role in regulating insulin signaling and glucose metabolism. Methods: In a diet-induced obese (DIO) mouse model of diabetes, expression of various Hsp90 isoforms in skeletal tissue was examined. Subsequent experiments characterized the role of Hsp90ab1 isoform in glucose metabolism and insulin signaling in primary human skeletal muscle myoblasts (HSMM) and a DIO mouse model...
2018: Nutrition & Metabolism
https://www.readbyqxmd.com/read/29434550/select-skeletal-muscle-mrnas-related-to-exercise-adaptation-are-minimally-affected-by-different-pre-exercise-meals-that-differ-in-macronutrient-profile
#12
Pim Knuiman, Maria T E Hopman, Jeroen A Wouters, Marco Mensink
Background: Substantial research has been done on the impact of carbohydrate and fat availability on endurance exercise adaptation, though its role in the acute adaptive response to resistance exercise has yet to be fully characterized. Purpose: We aimed to assess the effects of a pre-resistance exercise isocaloric mixed meal containing different amounts of carbohydrates and fat, on post-resistance exercise gene expression associated with muscle adaptation. Methods: Thirteen young (age 21.2 ± 1.6 year), recreationally trained (VO 2max 51...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29434287/angiotensin-ii-type-1-receptor-associated-protein-inhibits-angiotensin-ii-induced-insulin-resistance-with-suppression-of-oxidative-stress-in-skeletal-muscle-tissue
#13
Kohji Ohki, Hiromichi Wakui, Nozomu Kishio, Kengo Azushima, Kazushi Uneda, Sona Haku, Ryu Kobayashi, Kotaro Haruhara, Sho Kinguchi, Takahiro Yamaji, Takayuki Yamada, Shintaro Minegishi, Tomoaki Ishigami, Yoshiyuki Toya, Akio Yamashita, Kento Imajo, Atsushi Nakajima, Ikuma Kato, Kenichi Ohashi, Kouichi Tamura
Enhancement of AT1 receptor-associated protein (ATRAP) in adipose tissue improves high fat diet (HFD)-induced visceral obesity and insulin resistance, and suppresses adipose oxidative stress. However, HFD loading is not a direct stimulatory factor for AT1 receptor. In the present study, we investigated the effect of chronic, low-dose angiotensin II (Ang II) stimulation on glucose and lipid metabolism in mice and functional role of ATRAP. ATRAP expression was higher in adipose tissue (5-10-fold) and skeletal muscle tissue (approximately 1...
February 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29433422/the-effect-of-noise-exposure-on-insulin-sensitivity-in-mice-may-be-mediated-by-the-jnk-irs1-pathway
#14
Lijie Liu, Cong Fang, Jing Yang, Hongyu Zhang, Yi Huang, Chuanying Xuan, Yongfang Wang, Shengwei Li, Jun Sha, Mingming Zha, Min Guo
BACKGROUND: Epidemiological studies have suggested that noise exposure may increase the risk of type 2 diabetes mellitus (T2DM), and experimental studies have demonstrated that noise exposure can induce insulin resistance in rodents. The aim of the present study was to explore noise-induced processes underlying impaired insulin sensitivity in mice. METHODS: Male ICR mice were randomly divided into four groups: a control group without noise exposure and three noise groups exposed to white noise at a 95-dB sound pressure level for 4 h/day for 1, 10, or 20 days (N1D, N10D, and N20D, respectively)...
February 12, 2018: Environmental Health and Preventive Medicine
https://www.readbyqxmd.com/read/29432804/effects-of-long-term-nitrate-supplementation-on-carbohydrate-metabolism-lipid-profiles-oxidative-stress-and-inflammation-in-male-obese-type-2-diabetic-rats
#15
Sevda Gheibi, Sajad Jeddi, Mattias Carlström, Hanieh Gholami, Asghar Ghasemi
PURPOSE: Supplementation with inorganic nitrate to boost the nitrate-nitrite-nitric oxide (NO) pathway, may act as a potential therapeutic agent in diabetes. The aim of this study was to determine the effects of nitrate on carbohydrate metabolism, lipid profiles, oxidative stress, and inflammation in obese type 2 diabetic rats. METHODS: Male Wistar rats were divided into 4 groups: Control, control + nitrate, diabetes, and diabetes + nitrate. Diabetes was induced using a high-fat diet and low-dose of streptozotocin...
February 10, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29431403/mildly-elevated-liver-transaminase-levels-causes-and-evaluation
#16
Robert C Oh, Thomas R Hustead, Syed M Ali, Matthew W Pantsari
Mild, asymptomatic elevations (less than five times the upper limit of normal) of alanine transaminase and aspartate transaminase levels are common in primary care. It is estimated that approximately 10% of the U.S. population has elevated transaminase levels. An approach based on the prevalence of diseases that cause asymptomatic transaminase elevations can help clinicians efficiently identify common and serious liver disease. The most common causes of elevated transaminase levels are nonalcoholic fatty liver disease and alcoholic liver disease...
December 1, 2017: American Family Physician
https://www.readbyqxmd.com/read/29426839/association-of-muscle-mass-and-fat-mass-with-insulin-resistance-and-the-prevalence-of-metabolic-syndrome-in-korean-adults-a-cross-sectional-study
#17
Kyuwoong Kim, Sang Min Park
Relationship of muscle mass and fat mass with insulin resistance and metabolic syndrome remains uncertain, especially among Asian population. We performed a cross-sectional study with 14,807 adult participants aged between 18 and 65 in the fourth and fifth Korea National Health and Nutrition Examination Survey with Dual Energy X-ray Absorptiometry (DEXA) data to investigate whether muscle mass and fat mass are associated with insulin resistance and metabolic syndrome. DEXA records were used to categorize the participants into four categories (low muscle/low fat, low muscle/high fat, high muscle/ low fat, and high muscle/high fat)...
February 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29425549/low-relative-muscle-mass-and-left-ventricular-diastolic-dysfunction-in-middle-aged-adults
#18
Byung-Joon Ko, Yoosoo Chang, Jeong Gyu Kang, Jimin Kim, Hyun-Suk Jung, Kyung Eun Yun, Chan-Won Kim, Hocheol Shin, Seungho Ryu
OBJECTIVES: The association between low skeletal muscle mass and left ventricular diastolic dysfunction (LVDD), a predictor of future heart failure, is largely unexplored. We investigated the relationship between relative muscle mass and LVDD. METHODS: We conducted a cross-sectional study in 67,106 Koreans who underwent an echocardiography as part of a comprehensive health examination between January 2012 and December 2014. Skeletal muscle mass index (SMI) [SMI (%)=total skeletal muscle mass (kg)/body weight (kg)×100] was estimated using a bioelectrical impedance analyzer...
March 15, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29425508/%C3%AE-aminoisobutyric-acid-l-baiba-is-a-muscle-derived-osteocyte-survival-factor
#19
Yukiko Kitase, Julian A Vallejo, William Gutheil, Harika Vemula, Katharina Jähn, Jianxun Yi, Jingsong Zhou, Marco Brotto, Lynda F Bonewald
Exercise has beneficial effects on metabolism and on tissues. The exercise-induced muscle factor β-aminoisobutyric acid (BAIBA) plays a critical role in the browning of white fat and in insulin resistance. Here we show another function for BAIBA, that of a bone-protective factor that prevents osteocyte cell death induced by reactive oxygen species (ROS). l-BAIBA was as or more protective than estrogen or N-acetyl cysteine, signaling through the Mas-Related G Protein-Coupled Receptor Type D (MRGPRD) to prevent the breakdown of mitochondria due to ROS...
February 6, 2018: Cell Reports
https://www.readbyqxmd.com/read/29420089/characterization-of-vascular-dysregulation-in-meriones-shawi-after-high-calorie-diet-feeding
#20
Badiaa Lyoussi, Khadija Cherkaoui-Tangi, Nicole Morel, Maurice Wibo
The present study was initiated to characterize vascular dysregulations (contraction and relaxation) associated with metabolic defects in Merions shawi, a rodent from the gerbillidae family, submitted to 12 weeks high-calorie diet. This diet induces a type 2 diabetes/metabolic syndrome phenotype with hypertension. In diabetic meriones, body weight increase was associated with hyperglycemia, increased insulinemia, and insulin resistance. Compared to lean meriones, diabetic meriones showed decreased aorta contraction to noradrenaline, which was normalized after NOS inhibition...
February 8, 2018: Clinical and Experimental Hypertension: CHE
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