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Insulin tolerance

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https://www.readbyqxmd.com/read/28643356/bimagrumab-improves-body-composition-and-insulin-sensitivity-in-insulin-resistant-subjects
#1
Tania Garito, Ronenn Roubenoff, Marcus Hompesch, Linda Morrow, Katherine Gomez, Daniel Rooks, Charles Meyers, Monte Buchsbaum, Srikanth Neelakantham, Therese Swan, Lee Anne Filosa, Didier Laurent, Olivier Petricoul, Marjorie Zakaria
BACKGROUND: Skeletal muscle is a key mediator of insulin resistance. Bimagrumab, an antibody against activin receptor type II (ActRII), prevents binding of negative muscle regulators, like myostatin, and increases lean mass and decreases fat mass in animal models. OBJECTIVE: We hypothesized that an improving body composition in insulin resistant individuals could enhance insulin sensitivity. METHODS: Sixteen individuals with mean body mass index (BMI) = 29...
June 23, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28642969/diverse-metabolic-effects-of-o-glcnacylation-in-the-pancreas-but-limited-effects-in-insulin-sensitive-organs-in-mice
#2
Shogo Ida, Katsutaro Morino, Osamu Sekine, Natsuko Ohashi, Shinji Kume, Tokuhiro Chano, Kanako Iwasaki, Norio Harada, Nobuya Inagaki, Satoshi Ugi, Hiroshi Maegawa
AIMS/HYPOTHESIS: O-GlcNAcylation is characterised by the addition of N-acetylglucosamine to various proteins by O-GlcNAc transferase (OGT) and serves in sensing intracellular nutrients by modulating various cellular processes. Although it has been speculated that O-GlcNAcylation is associated with glucose metabolism, its exact role in whole body glucose metabolism has not been fully elucidated. Here, we investigated whether loss of O-GlcNAcylation globally and in specific organs affected glucose metabolism in mammals under physiological conditions...
June 22, 2017: Diabetologia
https://www.readbyqxmd.com/read/28642713/benefits-of-substituting-sitting-with-standing-and-walking-in-free-living-conditions-for-cardiometabolic-risk-markers-cognition-and-mood-in-overweight-adults
#3
Bernard M F M Duvivier, Nicolaas C Schaper, Annemarie Koster, Linh van Kan, Harry P F Peters, Jos J Adam, Timo Giesbrecht, Esther Kornips, Martine Hulsbosch, Paul Willems, Matthijs K C Hesselink, Patrick Schrauwen, Hans H C M Savelberg
Background: We investigated whether substituting sitting with standing and self-perceived light walking in free-living conditions would improve cardiometabolic risk factors, mood, and cognition in overweight/obese adults. Methods: In a randomized, cross-over study, 24 (m/f: 13/11) sedentary overweight/obese participants (64 ± 7 years, BMI 29 ± 2 kg/m(2)) followed two activity regimens of each 4 days in free-living conditions: "Sit": sitting 13.5 h/day, standing 1.4 h/day, self-perceived light-intensity walking 0...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28641781/pregnancy-to-postpartum-transition-of-serum-metabolites-in-women-with-gestational-diabetes
#4
Elin Chorell, Ulrika Andersson Hall, Carolina Gustavsson, Kerstin Berntorp, Jatta Puhkala, Riitta Luoto, Tommy Olsson, Agneta Holmäng
CONTEXT: Gestational diabetes is commonly linked to development of type 2 diabetes mellitus (T2DM). There is a need to characterize metabolic changes associated with gestational diabetes in order to find novel biomarkers for T2DM. OBJECTIVE: To find potential pathophysiological mechanisms and markers for progression from gestational diabetes mellitus to T2DM by studying the metabolic transition from pregnancy to postpartum. DESIGN: The metabolic transition profile from pregnancy to postpartum was characterized in 56 women by mass spectrometry-based metabolomics; 11 women had gestational diabetes mellitus, 24 had normal glucose tolerance, and 21 were normoglycaemic but at increased risk for gestational diabetes mellitus...
July 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28640866/diet-induced-adipose-tissue-expansion-is-mitigated-in-mice-with-a-targeted-inactivation-of-mesoderm-specific-transcript-mest
#5
Rea P Anunciado-Koza, Justin Manuel, Randall L Mynatt, Jingying Zhang, Leslie P Kozak, Robert A Koza
Interindividual variation of white adipose tissue (WAT) expression of mesoderm specific transcript (Mest), a paternally-expressed imprinted gene belonging to the α/β-hydrolase fold protein family, becomes apparent among genetically inbred mice fed high fat diet (HFD) and is positively associated with adipose tissue expansion (ATE). To elucidate a role for MEST in ATE, mice were developed with global and adipose tissue inactivation of Mest. Mice with homozygous (MestgKO) and paternal allelic (MestpKO) inactivation of Mest were born at expected Mendelian frequencies, showed no behavioral or physical abnormalities, and did not perturb expression of the Mest locus-derived microRNA miR-335...
2017: PloS One
https://www.readbyqxmd.com/read/28640233/metabolic-effects-of-high-glycaemic-index-diets-a-systematic-review-and-meta-analysis-of-feeding-studies-in-mice-and-rats
#6
REVIEW
Grace J Campbell, Alistair M Senior, Kim S Bell-Anderson
Low glycaemic index (LGI) diets are often reported to benefit metabolic health, but the mechanism(s) responsible are not clear. This review aimed to systematically identify studies investigating metabolic effects of high glycaemic index (HGI) versus LGI diets in mice and rats. A meta-analysis was conducted to calculate an overall effect size, Hedge's standardised mean differences (hereafter d), for each trait, with moderator variables considered in subsequent meta-regressions. Across 30 articles, a HGI diet increased five of the seven traits examined: body weight (d = 0...
June 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28640216/a-branched-chain-amino-acid-related-metabolic-signature-characterizes-obese-adolescents-with-non-alcoholic-fatty-liver-disease
#7
Martina Goffredo, Nicola Santoro, Domenico Tricò, Cosimo Giannini, Ebe D'Adamo, Hongyu Zhao, Gang Peng, Xiaoqing Yu, Tukiet T Lam, Bridget Pierpont, Sonia Caprio, Raimund I Herzog
Dysregulation of several metabolite pathways, including branched-chain amino acids (BCAAs), are associated with Non-Alcoholic Fatty Liver Disease (NAFLD) and insulin resistance in adults, while studies in youth reported conflicting results. We explored whether, independently of obesity and insulin resistance, obese adolescents with NAFLD display a metabolomic signature consistent with disturbances in amino acid and lipid metabolism. A total of 180 plasma metabolites were measured by a targeted metabolomic approach in 78 obese adolescents with (n = 30) or without (n = 48) NAFLD assessed by magnetic resonance imaging (MRI)...
June 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28639386/development-of-immune-response-to-tissue-restricted-self-antigens-in-simultaneous-kidney-pancreas-transplant-recipients-with-acute-rejection
#8
Muthukumar Gunasekaran, Neeta Vachharajani, Joseph P Gaut, Thin Thin Maw, Rowena Delos Santos, Surendra Shenoy, William C Chapman, Jason Wellen, Thalachallour Mohanakumar
Simultaneous kidney-pancreas transplantation (SKP Tx) is a treatment for end-stage kidney disease secondary to diabetes mellitus. We investigated the role of immune responses to donor human leukocyte antigens (HLA) and tissue-restricted kidney and pancreas self-antigens (KSAgs and PSAgs, respectively) in SKP Tx recipients (SKP TxRs). Sera collected from 39 SKP TxRs were used to determine de novo Abs specific for KSAgs (collagen-IV, Col-IV; fibronectin, FN) and PSAgs (insulin, islet cells, glutamic acid decarboxylase, and pancreas-associated protein-1) by ELISA...
June 21, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28638713/the-behavioral-and-physiological-effects-of-high-fat-diet-and-alcohol-consumption-sex-differences-in-c57bl6-j-mice
#9
Rachel R Gelineau, Nicole L Arruda, Jasmin A Hicks, Isabella Monteiro De Pina, Aikaterini Hatzidis, Joseph A Seggio
BACKGROUND AND OBJECTIVE: Animal studies can be a great tool to investigate sex differences in a variety of different ways, including behavioral and physiological responses to drug treatments and different "lifestyle variables" such as diets. Consumption of both high-fat diets and alcohol is known to affect anxiety behaviors and overall health. This project investigated how high-fat diet and alcohol access and its combination affected the behavior and physiology of male and female C57BL/6J mice...
June 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28637889/targeted-metabolomics-demonstrates-distinct-and-overlapping-maternal-metabolites-associated-with-bmi-glucose-and-insulin-sensitivity-during-pregnancy-across-four-ancestry-groups
#10
Saya Jacob, Michael Nodzenski, Anna C Reisetter, James R Bain, Michael J Muehlbauer, Robert D Stevens, Olga R Ilkayeva, Lynn P Lowe, Boyd E Metzger, Christopher B Newgard, Denise M Scholtens, William L Lowe
OBJECTIVE: We used targeted metabolomics in pregnant mothers to compare maternal metabolite associations with maternal BMI, glycemia, and insulin sensitivity. RESEARCH DESIGN AND METHODS: Targeted metabolomic assays of clinical metabolites, amino acids, and acylcarnitines were performed on fasting and 1-h postglucose serum samples from European ancestry, Afro-Caribbean, Thai, and Mexican American mothers (400 from each ancestry group) who participated in the Hyperglycemia and Adverse Pregnancy Outcome (HAPO) Study and underwent an oral glucose tolerance test at ∼28 weeks gestation...
July 2017: Diabetes Care
https://www.readbyqxmd.com/read/28637315/attenuated-effects-of-bile-acids-on-glucose-metabolism-and-insulin-sensitivity-in-a-male-mouse-model-of-prenatal-undernutrition
#11
Huijuan Ma, Vicencia M Sales, Ashley R Wolf, Sathish Subramanian, Tucker J Matthews, Michael Chen, Aparna Sharma, Walt Gall, Wim Kulik, David E Cohen, Yusuke Adachi, Nicholas W Griffin, Jeffrey I Gordon, Mary-Elizabeth Patti, Elvira Isganaitis
Prenatal undernutrition and low birth weight are associated with risk of type 2 diabetes and obesity. Prenatal caloric restriction results in low birth weight, glucose intolerance, obesity, and reduced plasma bile acids (BA) in offspring mice. Since BAs can regulate systemic metabolism and glucose homeostasis, we hypothesized that BA supplementation could prevent diet-induced obesity and glucose intolerance in this model of developmental programming. Pregnant dams were food restricted by 50% from gestational days 12...
June 15, 2017: Endocrinology
https://www.readbyqxmd.com/read/28636758/fetal-overnutrition-and-offspring-insulin-resistance-and-%C3%AE-cell-function-the-exploring-perinatal-outcomes-among-children-epoch-study
#12
K A Sauder, C W Hockett, B M Ringham, D H Glueck, D Dabelea
AIMS: To examine the associations of intrauterine exposure to maternal diabetes and obesity with offspring insulin resistance, β-cell function and oral disposition index in a longitudinal observational study of ethnically diverse offspring. METHODS: A total of 445 offspring who were exposed (n=81) or not exposed (n=364) to maternal diabetes in utero completed two fasting blood measurements at mean (sd) ages of 10.5 (1.5) and 16.5 (1.2) years, respectively, and an oral glucose tolerance test at the second visit...
June 21, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28636637/plasma-kisspeptin-levels-are-associated-with-insulin-secretion-in-nondiabetic-individuals
#13
Francesco Andreozzi, Gaia Chiara Mannino, Elettra Mancuso, Rosangela Spiga, Francesco Perticone, Giorgio Sesti
To evaluate if plasma kisspeptin concentrations are associated with insulin secretion, as suggested by recent in vitro studies, independently of confounders. 261 nondiabetic subjects were stratified into tertiles according to kisspeptin values. Insulin secretion was assessed using indexes derived from oral glucose tolerance test (OGTT). After adjusting for age, gender, and BMI, subjects in the highest (tertile 3) kisspeptin group exhibited significantly lower values of insulinogenic index, corrected insulin response (CIR30), and Stumvoll indexes for first-phase and second-phase insulin release as compared with low (tertile 1) or intermediate (tertile 2) kisspeptin groups...
2017: PloS One
https://www.readbyqxmd.com/read/28635632/glucose-and-lipid-dysmetabolism-in-a-rat-model-of-prediabetes-induced-by-a-high-sucrose-diet
#14
Ana Burgeiro, Manuela G Cerqueira, Bárbara M Varela-Rodríguez, Sara Nunes, Paula Neto, Frederico C Pereira, Flávio Reis, Eugénia Carvalho
Glucotoxicity and lipotoxicity are key features of type 2 diabetes mellitus, but their molecular nature during the early stages of the disease remains to be elucidated. We aimed to characterize glucose and lipid metabolism in insulin-target organs (liver, skeletal muscle, and white adipose tissue) in a rat model treated with a high-sucrose (HSu) diet. Two groups of 16-week-old male Wistar rats underwent a 9-week protocol: HSu diet (n = 10)-received 35% of sucrose in drinking water; Control (n = 12)-received vehicle (water)...
June 21, 2017: Nutrients
https://www.readbyqxmd.com/read/28635334/timing-of-food-intake-during-simulated-night-shift-impacts-glucose-metabolism-a-controlled-study
#15
Crystal L Grant, Alison M Coates, Jillian Dorrian, David J Kennaway, Gary A Wittert, Leonie K Heilbronn, Maja Pajcin, Chris Della Vedova, Charlotte C Gupta, Siobhan Banks
Eating during the night may increase the risk for obesity and type 2 diabetes in shift workers. This study examined the impact of either eating or not eating a meal at night on glucose metabolism. Participants underwent four nights of simulated night work (SW1-4, 16:00-10:00 h, <50 lux) with a daytime sleep opportunity each day (10:00-16:00 h, <3 lux). Healthy males were assigned to an eating at night (NE; n = 4, meals; 07:00, 19:00 and 01:30 h) or not eating at night (NEN; n = 7, meals; 07:00 h, 09:30, 16:10 and 19:00 h) condition...
June 21, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28632178/an-increased-dietary-supply-of-medium-chain-fatty-acids-during-early-weaning-in-rodents-prevents-excessive-fat-accumulation-in-adulthood
#16
Bert J M van de Heijning, Annemarie Oosting, Diane Kegler, Eline M van der Beek
Medium-chain fatty acids (MCFA) are a directly and readily absorbed source of energy. Exposure early-in-life to increased MCFA levels might affect development and impact (lipid) metabolism later in life. We tested whether an increased MCFA intake early-in-life positively affects adult body composition and metabolic status when challenged by a western-style diet (WSD). Male offspring of C57Bl/6j mice and Wistar rats were fed a control diet (CTRL; 10 w% fat, 14% MCFA) or a medium-chain triglycerides (MCT) diet with 20% MCFA until postnatal (PN) day 42, whereupon animals were fed a WSD (10 w% fat) until PN day 98...
June 20, 2017: Nutrients
https://www.readbyqxmd.com/read/28629388/the-albumin-exendin-4-recombinant-protein-e2hsa-improves-glycemic-control-and-%C3%AE-cell-function-in-spontaneous-diabetic-kkay-mice
#17
Caina Li, Shaocong Hou, Shuainan Liu, Yi Huan, Sujuan Sun, Quan Liu, Zhufang Shen
BACKGROUND: E2HSA is a genetic fusion protein that consists of two tandem exendin-4 molecules that are covalently bonded to recombinant human serum albumin via a peptide linker. Previous studies have demonstrated that E2HSA significantly decreased blood glucose levels, improved β-cell function and promoted β-cell proliferation in diabetic db/dB mice. This study aimed to evaluate the benefits of E2HSA on glucose and lipid metabolism in a spontaneous diabetes animal model, KKAy mice. METHODS: E2HSA was acutely administered at doses of 1, 3 and 9 mg/kg by subcutaneous injection in diabetic KKAy mice with exendin-4 (2 μg/kg) as a positive reference, and then the non-fasting blood glucose and food intake levels were dynamically monitored...
June 19, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28628847/the-importance-of-declining-insulin-requirements-during-pregnancy-in-patients-with-pre-gestational-gestational-diabetes-mellitus
#18
Maya Ram, Larissa Feinmesser, Shiri Shinar, Sharon Maslovitz
OBJECTIVE: In patients with pre-gestational and gestational diabetes mellitus (GDM), insulin requirements often increase during the third trimester of pregnancy in order to maintain proper glycemic control. However, a fraction of patients demonstrate a significant decrease in insulin requirements in late gestation. We aimed to evaluate the clinical significance of decreasing insulin requirements in patients with pre-gestational diabetes and GDM with respect to fetal wellbeing and pregnancy outcome...
June 3, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28628263/insulin-resistance-increases-the-risk-of-incident-type-2-diabetes-mellitus-in-patients-with-nonalcoholic-fatty-liver-disease
#19
Yuya Seko, Yoshio Sumida, Saiyu Tanaka, Kojiroh Mori, Hiroyoshi Taketani, Hiroshi Ishiba, Tasuku Hara, Akira Okajima, Atsushi Umemura, Taichiro Nishikawa, Kanji Yamaguchi, Michihisa Moriguchi, Kazuyuki Kanemasa, Kohichiroh Yasui, Shunsuke Imai, Keiji Shimada, Yoshito Itoh
BACKGROUND: Type 2 diabetes mellitus (T2DM) is a major complication of patients with nonalcoholic fatty liver disease (NAFLD). The aim of this retrospective study is to determine the risk factor for development of T2DM in patients with biopsy proven NAFLD. METHODS: Consecutive 162 patients with biopsy-proven NAFLD patients who received 75g oral glucose tolerance test (OGTT) were enrolled as the total cohort. Among them, we analyzed 89 patients without T2DM diagnosed by OGTT to estimate the cumulative rate for development of T2DM as the follow-up cohort...
June 19, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28628125/enhanced-insulin-sensitivity-in-successful-long-term-weight-loss-maintainers-compared-with-matched-controls-with-no-weight-loss-history
#20
L D Clamp, D J Hume, E V Lambert, J Kroff
BACKGROUND: Weight gain is associated with deterioration in metabolic health, whereas weight loss improves insulin sensitivity. This study assesses the impact of long-term, successfully maintained weight loss and weight-loss relapse on measures of insulin sensitivity and identifies factors that explain variability in insulin sensitivity. METHODS: Women (20-45 years) were recruited into four groups: reduced-overweight/obese (RED, n=15); body mass index (BMI)-matched controls (stable low-weight, n=19), BMI⩽27 kg m(-2); relapsed-overweight/obese subjects (REL, n=11); and BMI-matched controls (obese stable weight, n=11), BMI⩾27 kg m(-2)...
June 19, 2017: Nutrition & Diabetes
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