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Insulin tolerance

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https://www.readbyqxmd.com/read/29166392/intestinal-ralstonia-pickettii-augments-glucose-intolerance-in-obesity
#1
Shanthadevi D Udayappan, Petia Kovatcheva-Datchary, Guido J Bakker, Stefan R Havik, Hilde Herrema, Patrice D Cani, Kristien E Bouter, Clara Belzer, Julia J Witjes, Anne Vrieze, Noor de Sonnaville, Alice Chaplin, Daniel H van Raalte, Steven Aalvink, Geesje M Dallinga-Thie, Hans G H J Heilig, Göran Bergström, Suzan van der Meij, Bart A van Wagensveld, Joost B L Hoekstra, Frits Holleman, Erik S G Stroes, Albert K Groen, Fredrik Bäckhed, Willem M de Vos, Max Nieuwdorp
An altered intestinal microbiota composition has been implicated in the pathogenesis of metabolic disease including obesity and type 2 diabetes mellitus (T2DM). Low grade inflammation, potentially initiated by the intestinal microbiota, has been suggested to be a driving force in the development of insulin resistance in obesity. Here, we report that bacterial DNA is present in mesenteric adipose tissue of obese but otherwise healthy human subjects. Pyrosequencing of bacterial 16S rRNA genes revealed that DNA from the Gram-negative species Ralstonia was most prevalent...
2017: PloS One
https://www.readbyqxmd.com/read/29164254/effect-of-oral-insulin-on-prevention-of-diabetes-in-relatives-of-patients-with-type-1-diabetes-a-randomized-clinical-trial
#2
Jeffrey P Krischer, Desmond A Schatz, Brian Bundy, Jay S Skyler, Carla J Greenbaum
Importance: Type 1 diabetes requires major lifestyle changes and carries increased morbidity and mortality. Prevention or delay of diabetes would have major clinical effect. Objective: To determine whether oral insulin delays onset of type 1 diabetes in autoantibody-positive relatives of patients with type 1 diabetes. Design, Setting, and Participants: Between March 2, 2007, and December 21, 2015, relatives with at least 2 autoantibodies, including insulin autoantibodies and normal glucose tolerance, were enrolled in Canada, the United States, Australia, New Zealand, the United Kingdom, Italy, Sweden, Finland, and Germany...
November 21, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/29163137/multiple-evidences-for-association-between-cognitive-impairment-and-dysglycemia-in-parkinson-s-disease-implications-for-clinical-practice
#3
Liu Yang, Zhilin Chen, Bo Li, Meihua Wang, Lijia Yu, Ying Wan, Jing Gan, Yu Zhang, Zhenguo Liu, Xijin Wang
Background and purpose: It remains unclear about the etiopathogenesis of cognitive impairment (CI) in Parkinson's disease (PD). Since diabetes mellitus (DM) has been shown to be associated with CI in several diseases, we examined the association between CI and dysglycemia in PD. Methods: Enrolled PD patients completed a series of clinical and neuropsychological assessments. Motor symptoms were determined by Hohen-Yahr staging (H-Y staging) and Unified Parkinson's Disease Rating Scale - motor score (UPDRS-III)...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29162603/exogenous-insulin-infusion-can-decrease-atherosclerosis-in-diabetic-rodents-by-improving-lipids-inflammation-and-endothelial-function
#4
Kyoungmin Park, Qian Li, Net Daş Evcimen, Christian Rask-Madsen, Yasutaka Maeda, Ernesto Maddaloni, Hisashi Yokomizo, Takanori Shinjo, Ronald St-Louis, Jialin Fu, Daniel Gordin, Mogher Khamaisi, David Pober, Hillary Keenan, George L King
OBJECTIVE: The objective of this study is to evaluate whether exogenously induced hyperinsulinemia may increase the development of atherosclerosis. APPROACH AND RESULTS: Hyperinsulinemia, induced by exogenous insulin implantation in high-fat fed (60% fat HFD) apolipoprotein E-deficient mice (ApoE(-/-)) mice, exhibited insulin resistance, hyperglycemia, and hyperinsulinemia. Atherosclerosis was measured by the accumulation of fat, macrophage, and extracellular matrix in the aorta...
November 21, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29162361/impaired-beta-cell-sensitivity-to-incretins-in-type-2-diabetes-is-insufficiently-compensated-by-higher-incretin-response
#5
A Tura, J I Bagger, E Ferrannini, J J Holst, F K Knop, T Vilsbøll, A Mari
BACKGROUND AND AIMS: The incretin effect is impaired in type 2 diabetes (T2D), but the underlying mechanisms are only partially understood. We investigated the relationships between the time course of the incretin effect and that of glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) during oral glucose tolerance tests (OGTTs), thereby estimating incretin sensitivity of the beta cell, and its associated factors. METHODS AND RESULTS: Eight patients with T2D and eight matched subjects with normal glucose tolerance (NGT) received 25, 75, and 125 g OGTTs and corresponding isoglycemic glucose infusions (IIGI)...
October 13, 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/29161229/sex-and-dose-specific-effects-of-maternal-bisphenol-a-exposure-on-pancreatic-islets-of-first-and-second-generation-adult-mice-offspring
#6
Amita Bansal, Cetewayo Rashid, Frances Xin, Changhong Li, Erzsebet Polyak, Anna Duemler, Tom van der Meer, Martha Stefaniak, Sana Wajid, Nicolai Doliba, Marisa S Bartolomei, Rebecca A Simmons
BACKGROUND: Exposure to the environmental endocrine disruptor bisphenol A (BPA) is ubiquitous and associated with the increased risk of diabetes and obesity. However, the underlying mechanisms remain unknown. We recently demonstrated that perinatal BPA exposure is associated with higher body fat, impaired glucose tolerance, and reduced insulin secretion in first- (F1) and second-generation (F2) C57BL/6J male mice offspring. OBJECTIVE: We sought to determine the multigenerational effects of maternal bisphenol A exposure on mouse pancreatic islets...
September 27, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/29158249/objectively-measured-physical-activity-and-sedentary-time-are-associated-with-cardiometabolic-risk-factors-in-adults-with-prediabetes-the-preview-study
#7
Nils Swindell, Kelly Mackintosh, Melitta McNarry, Jeffrey W Stephens, Diewertje Sluik, Mikael Fogelholm, Mathijs Drummen, Ian MacDonald, J Alfredo Martinez, Teodora Handjieva-Darlenska, Sally D Poppitt, Jennie Brand-Miller, Thomas M Larsen, Anne Raben, Gareth Stratton
OBJECTIVE: The aim of the present cross-sectional study was to examine the association among physical activity (PA), sedentary time (ST), and cardiometabolic risk in adults with prediabetes. RESEARCH DESIGN AND METHODS: Participants (n = 2,326; 25-70 years old, 67% female) from eight countries, with a BMI >25 kg ⋅ m(-2) and impaired fasting glucose (5.6-6.9 mmol ⋅ L(-1)) or impaired glucose tolerance (7.8-11.0 mmol ⋅ L(-1) at 2 h), participated. Seven-day accelerometry objectively assessed PA levels and ST...
November 20, 2017: Diabetes Care
https://www.readbyqxmd.com/read/29158183/serine-prevented-high-fat-diet-induced-oxidative-stress-by-activating-ampk-and-epigenetically-modulating-the-expression-of-glutathione-synthesis-related-genes
#8
Xihong Zhou, Liuqin He, Shengnan Zuo, Yumei Zhang, Dan Wan, Ciming Long, Pan Huang, Canrong Wu, Xin Wu, Gang Liu, Yulong Yin
Serine deficiency has been observed in patients with nonalcoholic fatty liver disease (NAFLD). Whether serine supplementation has any beneficial effects on the prevention of NAFLD remains unknown. The present study was conducted to investigate the effects of serine supplementation on hepatic oxidative stress and steatosis and its related mechanisms. Forty male C57BL/6J mice (9week-old) were randomly assigned into four groups (n=10) and fed: i) a low-fat diet; ii) a low-fat diet supplemented with 1% (wt:vol) serine; iii) a high-fat (HF) diet; and iv) a HF diet supplemented with 1% serine, respectively...
November 17, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29157780/growth-hormone-gh-and-prolactin-responses-to-a-non-exercise-stress-test-in-athletes-with-overtraining-syndrome-results-from-the-endocrine-and-metabolic-responses-on-overtraining-syndrome-eros-eros-stress
#9
Flavio A Cadegiani, Claudio E Kater
OBJECTIVES: Overtraining syndrome (OTS) leads to worsened sports performance and fatigue. The pathophysiology of OTS has not been entirely elucidated, and there is a lack of accurate markers for its diagnosis. Changes in hormonal responses implicated in OTS were stimulated by exercise, which has limited their interpretation. Hence, we aimed to evaluate growth hormone (GH) and prolactin responses to a gold-standard and exercise-independent stimulation test, the insulin tolerance test (ITT)...
November 16, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29157580/obstructive-sleep-apnea-and-diet-controlled-gestational-diabetes
#10
Ekasitt Wanitcharoenkul, Naricha Chirakalwasan, Somvang Amnakkittikul, Suranut Charoensri, Sunee Saetung, Suwannee Chanprasertyothin, La-Or Chailurkit, Panyu Panburana, Sommart Bumrungphuet, Boonsong Ongphiphadhanakul, Sirimon Reutrakul
BACKGROUND: Obstructive sleep apnea (OSA) was shown to be associated with gestational diabetes mellitus (GDM). However, prevalence of OSA in GDM women, its relationship to metabolic control, and predictive factors have not been studied. MATERIAL AND METHODS: Eighty-two obese pregnant women with diet-controlled GDM between 24 and 34 weeks of gestation participated. The Berlin questionnaire was used to assess OSA symptoms. OSA was diagnosed using an overnight monitor...
November 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29157578/evaluation-of-the-insulinotropic-and-glucose-lowering-actions-of-zebrafish-gip-in-mammalian-systems-evidence-for-involvement-of-the-glp-1-receptor
#11
Galyna V Graham, J Michael Conlon, Yasser H Abdel-Wahab, Victor A Gault, Peter R Flatt
The insulinotropic properties of zebrafish GIP (zfGIP) were assessed in vitro using clonal pancreatic β-cell lines and isolated mouse islets and acute effects on glucose tolerance and insulin release in vivo were evaluated in mice. The peptide produced a dose-dependent increase in the rate of insulin release from BRIN-BD11 rat clonal β-cells at concentrations ≥30nM. Insulin release from 1.1 B4 human clonal β-cells and mouse islets was significantly increased by zfGIP (10nM and 1μM). The in vitro insulinotropic activity of zfGIP was decreased after incubating BRIN-BD11 cells with the GLP-1 receptor antagonist, exendin-4(9-39) (p<0...
November 17, 2017: Peptides
https://www.readbyqxmd.com/read/29156994/experimental-diabetes-impairs-maternal-reproductive-performance-in-pregnant-wistar-rats-and-their-offspring
#12
Leticia Bequer, Tahiry Gómez, José L Molina, Alain Álvarez, Claudia Chaviano, Sonia Clapés
The aim of this study was to determine the effect of mild hyperglycemia on metabolism during pregnancy, the maternal reproductive performance, and the characteristics of the offspring in neonatal mild diabetic-induced Wistar rats. The experimental diabetes model was generated by neonatal streptozotocin administration (100 mg of streptozotocin/Kg bw/sc) in female Wistar rats. At adulthood, the control and diabetic group were mated. At the 20th day of gestation, a maternal and fetal blood sample were collected for biochemical measurement...
November 20, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29155999/high-incomplete-skeletal-muscle-fatty-acid-oxidation-explains-low-muscle-insulin-sensitivity-in-poorly-controlled-t2d
#13
Timothy P Gavin, Jacob M Ernst, Hyo-Bum Kwak, Sarah E Caudill, Melissa A Reed, Ron T Garner, Yaohui Nie, Jessica A Weiss, Walter J Pories, Moahad Dar, Chien-Te Lin, Monica J Hubal, P Darrell Neufer, Shihuan Kuang, G Lynis Dohm
Aim: We investigated if skeletal muscle insulin sensitivity was different between well (WCD) and poorly (PCD) controlled T2D and if the difference was associated with differences due to mitochondrial respiratory function. Methods: Vastus lateralis muscle mitochondrial respiration, mitochondrial content, mitochondrial enzyme activity, and fatty acid oxidation (FAO) were measured. Insulin sensitivity (SI) and the acute response to glucose (AIRg) were calculated by MINMOD analysis from glucose and insulin obtained during a modified, frequently sampled, intravenous glucose tolerance test...
November 15, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29155496/insulin-resistance-in-chronic-kidney-disease
#14
REVIEW
Hong Xu, Juan J Carrero
This review provides an overview of insulin resistance (IR) in patients with chronic kidney disease (CKD). IR is a pathological state in which target tissues fail to respond normally to insulin. IR is understood as a consequence of CKD and its prevalence rises particularly in advanced CKD stages. Mechanisms leading to IR are complex and multifactorial, involving post-receptor signaling defects, unhealthy lifestyles, metabolic acidosis, inflammation, oxidative stress, vitamin D deficiency, anemia, and uremic toxicity, as shown by human and experimental studies over the last 30 years...
December 2017: Nephrology
https://www.readbyqxmd.com/read/29155303/therapeutic-vaccine-against-il-1%C3%AE-improved-glucose-control-in-a-mouse-model-of-type-2-diabetes
#15
Yue Zhang, Xiao-Lin Yu, Jun Zha, Li-Zhen Mao, Jia-Qian Chai, Rui-Tian Liu
AIMS: Inflammation is strongly associated with the mechanisms of β-cell failure in type 2 diabetes. Blockade of the key proinflammatory cytokine IL-1β has been implicated as a promising therapeutic strategy for the prevention and treatment of type 2 diabetes. In this study, we developed an IL-1β-targeted therapeutic vaccine consisting of an IL-1β epitope peptide (A1β) and assessed its efficacy on a diabetic KK-A(y) mouse model. MAIN METHODS: KK-A(y) mice were immunized with A1β for three injections at a 2-week interval...
November 16, 2017: Life Sciences
https://www.readbyqxmd.com/read/29155153/the-glp-1-response-to-glucose-does-not-mediate-beta-and-alpha-cell-dysfunction-in-hispanics-with-abnormal-glucose-metabolism
#16
Elizabeth Adams, Pauline Genter, Emma Keefe, Kevin Sandow, Virginia Gray, Jerome I Rotter, Yii-Der Ida Chen, Eli Ipp
AIMS: Glucagon-like peptide-1 (GLP-1) contributes to insulin secretion after meals. Though Hispanics have increased risk for type 2 diabetes mellitus, it is unknown if impaired GLP-1 secretion contributes to this risk. We therefore studied plasma GLP-1 secretion and action in Hispanic adults. METHODS: Hispanic (H; n=31) and non-Hispanic (nH; n=15) participants underwent an oral glucose tolerance test (OGTT). All participants were categorized by glucose tolerance into four groups: normal glucose tolerant non-Hispanic (NGT-nH; n = 15), normal glucose tolerant Hispanic (NGT-H; n = 12), impaired glucose tolerant Hispanic (IGT-H; n = 11), or newly diagnosed type 2 diabetes mellitus, Hispanic (T2D-H; n = 8)...
November 16, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29155039/perinatal-nicotine-exposure-increases-obesity-susceptibility-by-peripheral-leptin-resistance-in-adult-female-rat-offspring
#17
Wan-Xia Zhang, Yin-Ping Li, Jie Fan, Hui-Jian Chen, Gai-Ling Li, Yan-Qiong Ouyang, You-E Yan
Maternal nicotine (NIC) exposure causes overweight, hyperleptinemia and metabolic disorders in adult offspring. Our study aims to explore the underlying mechanism of perinatal NIC exposure increases obesity susceptibility in adult female rat offspring. In our model, we found that adult NIC-exposed females presented higher body weight and subcutaneous and visceral fat mass, as well as larger adipocytes, while no change was found in food intake. Serum profile showed a higher serum glucose, insulin and leptin levels in NIC-exposed females...
November 15, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/29152839/beta-cell-sensitivity-to-glucose-is-impaired-after-gastric-bypass-surgery
#18
Marzieh Salehi, Amalia Gastaldelli, David A D'Alessio
AIMS: Patients with Roux-en-Y gastric bypass surgery (GB) have exaggerated postprandial insulin secretion, which has been attributed to increased meal glucose appearance and enhanced incretin effect. Here we sought to determine β-cell glucose sensitivity in the absence of meal stimulation and insulinotropic gut factors. MATERIALS AND METHODS: Twelve non-diabetic subjects with prior GB, and 7 matched non-surgical controls with normal glucose tolerance were studied...
November 20, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29151531/repeated-hypoglycemic-episodes-with-postprandial-hyperinsulinemia-after-the-recovery-from-acute-weight-loss-revealed-by-continuous-glucose-monitoring-and-the-oral-glucose-tolerance-test
#19
Seizaburo Masuda, Masanori Murakami, Ryotaro Bouchi, Isao Minami, Koshi Hashimoto, Takanobu Yoshimoto, Yoshihiro Ogawa
We herein report a case of a 20-year-old woman who experienced hypoglycemia in parallel with acute weight loss confirmed by continuous glucose motoring (CGM). When she recovered from the acute weight loss, CGM revealed nocturnal and postprandial hypoglycemia. Six months were required to resolve the hypoglycemia and hyperinsulinemia after the recovery of her weight. Our case suggests that the adaption of insulin secretion to the rapid loss of weight and to the recovery of weight may require a long period of time, leading to the excessive secretion of insulin relative to the glucose level and repeated hypoglycemic episodes with postprandial hyperinsulinemia...
November 20, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29151239/increased-serum-3-carboxy-4-methyl-5-propyl-2-furanpropanoic-acid-cmpf-levels-are-associated-with-glucose-metabolism-in-chinese-pregnant-women
#20
J Yi, H Jin, R Zhang, S Zhang, P Chen, X Yu, X Zhang
PURPOSE: Previous studies have found that 3-carboxy-4-methyl-5-propyl-2-furanpropanoic acid (CMPF) was associated with diabetes. This study aimed to investigate the relationship between abnormal increased CMPF levels and gestational diabetes mellitus (GDM). METHODS: We recruited 828 pregnant women, and all of them underwent an oral glucose tolerance test (OGTT). We screened out 141 GDM patients and 230 pregnant women with normal glucose tolerance as controls. The serum CMPF concentration in participants was measured, and the relationship between the serum CMPF concentration and various parameters and biochemical indices was analyzed...
November 18, 2017: Journal of Endocrinological Investigation
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