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Hyperinsulinemia

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https://www.readbyqxmd.com/read/28819865/melatonin-mitochondria-and-the-metabolic-syndrome
#1
REVIEW
Daniel P Cardinali, Daniel E Vigo
A number of risk factors for cardiovascular disease including hyperinsulinemia, glucose intolerance, dyslipidemia, obesity, and elevated blood pressure are collectively known as metabolic syndrome (MS). Since mitochondrial activity is modulated by the availability of energy in cells, the disruption of key regulators of metabolism in MS not only affects the activity of mitochondria but also their dynamics and turnover. Therefore, a link of MS with mitochondrial dysfunction has been suspected since long. As a chronobiotic/cytoprotective agent, melatonin has a special place in prevention and treatment of MS...
August 17, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28817837/influence-of-dietary-insulin-scores-on-survival-in-colorectal-cancer-patients
#2
Chen Yuan, Ying Bao, Kaori Sato, Katharina Nimptsch, Mingyang Song, Jennie C Brand-Miller, Vicente Morales-Oyarvide, Emilie S Zoltick, NaNa Keum, Brian M Wolpin, Jeffrey A Meyerhardt, Andrew T Chan, Walter C Willett, Meir J Stampfer, Kana Wu, Edward L Giovannucci, Charles S Fuchs, Kimmie Ng
BACKGROUND: Although hyperinsulinemia is hypothesised to be involved in colorectal carcinogenesis, it remains unclear whether a diet inducing an elevated insulin response influences colorectal cancer (CRC) survival. METHODS: We examined the association of post-diagnosis dietary insulin scores with survival among 2006 patients from two large prospective cohorts who were diagnosed with CRC from 1976 to 2010. Dietary insulin load was calculated as a function of the food insulin index...
August 17, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28813108/consequences-of-gestational-diabetes-to-the-brain-and-behavior-of-the-offspring
#3
Ricardo A L DE Sousa, Yasmin S Torres, Claudia P Figueiredo, Giselle F Passos, Julia R Clarke
Gestational diabetes mellitus (GD) is a form of insulin resistance triggered during the second/third trimesters of pregnancy in previously normoglycemic women. It is currently estimated that 10% of all pregnancies in the United States show this condition. For many years, the transient nature of GD has led researchers and physicians to assume that long-term consequences were absent. However, GD diagnosis leads to a six-fold increase in the risk of developing type 2 diabetes (T2D) in women and incidence of obesity and T2D is also higher among their infants...
August 14, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28810587/association-of-polycystic-ovary-syndrome-with-metabolic-syndrome-and-gestational-diabetes-aggravated-complication-of-pregnancy
#4
Kui Yao, Ce Bian, Xia Zhao
Polycystic ovary syndrome (PCOS) affects 5-20% of the reproductive age women globally. PCOS is diagnosed by the presence of hyperandrogenism, oligo-anovulation, and polycystic morphology of at least one ovary. Insulin resistance (IR), hyperinsulinemia and associated metabolic abnormalities including metabolic syndrome play a significant role in the development of PCOS. The chances of developing MS in PCOS women was shown to increase by almost 14-fold in patients with increasing body mass index. Even in the absence of overt obesity, a preferential deposition of intra-abdominal fat is noted in PCOS women and this intra-abdominal fat leads to impaired insulin action and functional IR and hyperandrogenism...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28798193/the-role-of-vascular-endothelial-growth-factor-b-in-metabolic-homeostasis-current-evidence
#5
Mohammad Ishraq Zafar, Juan Zheng, Wen Kong, Xiaofeng Ye, Luoning Gou, Anita Regmi, Lu-Lu Chen
It has been shown that adipose tissue and skeletal muscles of lean individuals respond to meal-induced hyperinsulinemia by increases in perfusion, the effect not observed in patients with metabolic syndrome. In conditions of hyperglycaemia and hypertriglyceridemia, this insufficient vascularization leads to the liberation of reactive oxygen species, and disruption of nitric oxide synthesis and endothelial signalling responsible for the uptake of circulating fatty acids, whose accumulation in skeletal muscles and adipose tissue is widely associated with impairment of insulin signalling...
August 10, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28796307/relationship-between-%C3%AE-cell-response-and-insulin-sensitivity-in-horses-based-on-the-oral-sugar-test-and-the-euglycemic-hyperinsulinemic-clamp
#6
S Lindåse, K Nostell, J Söder, J Bröjer
BACKGROUND: A hyperbolic relationship between β-cell response and insulin sensitivity (IS) has been described in several species including rodents, dogs, and humans. This relationship has not been elucidated in the horse. HYPOTHESIS/OBJECTIVES: To determine whether the hyperbolic relationship between β-cell response and IS exists in horses by using indices of β-cell response from the oral sugar test (OST) and IS measurements from the euglycemic hyperinsulinemic clamp (EHC)...
August 10, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28791994/-expression-of-epidermal-growth-factor-receptor-in-patients-with-insulin-resistance-and-seborrheic-keratomas
#7
V A Smolyannikova, A K Alexandrova
AIM: to study the expression of epidermal growth factor receptor (EGFR) in patients with seborrheic keratomas (SK) and insulin resistance (type 2 diabetes mellitus (DM2)) and in those without concomitant carbohydrate metabolic disturbances. SUBJECTS AND METHODS: 80 patients with SK were examined. According to the presence or absence of DM2, the patients were divided into 2 groups: 1) 40 patients with concomitant DM2; 2) 40 people without carbohydrate metabolic disturbances...
2017: Arkhiv Patologii
https://www.readbyqxmd.com/read/28791858/the-pathogenesis-and-treatment-of-polycystic-ovary-syndrome-what-s-new
#8
REVIEW
Sylwia Bednarska, Agnieszka Siejka
Polycystic ovary syndrome (PCOS) is currently the leading cause of menstrual complications in women. It is characterized by clinical and/or biochemical hyperandrogenism, ovulation abnormalities and the presence of enlarged and/or polycystic ovaries in ultrasound images (12 or more small bubbles located circumferentially and/or ovarian volume > 10 mL). It is often comorbid with hyperinsulinemia, dyslipidemia, overweight or obesity, and is a risk factor for the development of diabetes and cardiovascular diseases (CVDs)...
March 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28789938/azilsartan-ameliorates-diabetic-cardiomyopathy-in-young-db-db-mice-through-the-modulation-of-ace-2-ang-1-7-mas-receptor-cascade
#9
Vijayakumar Sukumaran, Hirotsugu Tsuchimochi, Eisuke Tatsumi, Mikiyasu Shirai, James T Pearson
Hyperglycemia up-regulates intracellular angiotensin II (ANG-II) production in cardiac myocytes. This study investigated the hemodynamic and metabolic effects of azilsartan (AZL) treatment in a mouse model of diabetic cardiomyopathy and whether the cardioprotective effects of AZL are mediated by the angiotensin converting enzyme (ACE)-2/ANG 1-7/Mas receptor (R) cascade. Control db/+ and db/db mice (n=5 per group) were treated with vehicle or AZL (1 or 3mg/kg/d oral gavage) from the age of 8 to 16weeks. Echocardiography was then performed and myocardial protein levels of ACE-2, Mas R, AT1R, AT2R, osteopontin, connective tissue growth factor (CTGF), atrial natriuretic peptide (ANP) and nitrotyrosine were measured by Western blotting...
August 5, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28778047/metformin-treatment-significantly-enhances-intestinal-glucose-uptake-in-patients-with-type-2-diabetes-results-from-a-randomized-clinical-trial
#10
Jukka P Koffert, Kirsi Mikkola, Kirsi A Virtanen, Anna-Maria D Andersson, Linda Faxius, Kirsti Hällsten, Mikael Heglind, Letizia Guiducci, Tam Pham, Johanna M U Silvola, Jenni Virta, Olof Eriksson, Saila P Kauhanen, Antti Saraste, Sven Enerbäck, Patricia Iozzo, Riitta Parkkola, Maria F Gomez, Pirjo Nuutila
AIMS: Metformin therapy is associated with diffuse intestinal (18)F-fluoro-deoxyglucose (FDG) accumulation in clinical diagnostics using routine FDG-PET imaging. We aimed to study whether metformin induced glucose uptake in intestine is associated with the improved glycaemic control in patients with type 2 diabetes. Therefore, we compared the effects of metformin and rosiglitazone on intestinal glucose metabolism in patients with type 2 diabetes in a randomized placebo controlled clinical trial, and further, to understand the underlying mechanism, evaluated the effect of metformin in rats...
July 20, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28763556/modifications-in-retinal-mitochondrial-respiration-precede-type-2-diabetes-and-protracted-microvascular-retinopathy
#11
Woo Hyun Han, Jonathan Gotzmann, Sharee Kuny, Hui Huang, Catherine B Chan, Hélène Lemieux, Yves Sauvé
Purpose: To characterize retinal mitochondrial respiration associated with type 2 diabetes (T2D) progression in a cone-rich diurnal rodent, the Nile rat (genus Arvicanthis, species niloticus). Methods: Nile rats were fed a standard rodent diet that resulted in rising glucose levels from 6 months. Age-matched control animals were fed a high-fiber diet that prevented diabetes up to 18 months. The functional status of specific retinal mitochondrial components and mitochondrial outer membrane integrity were studied by using high-resolution respirometry...
August 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28759135/acute-and-long-term-administration-of-palmitoylcarnitine-induces-muscle-specific-insulin-resistance-in-mice
#12
Edgars Liepinsh, Marina Makrecka-Kuka, Elina Makarova, Kristine Volska, Karlis Vilks, Eduards Sevostjanovs, Unigunde Antone, Janis Kuka, Reinis Vilskersts, Daina Lola, Einars Loza, Solveiga Grinberga, Maija Dambrova
Acylcarnitine accumulation has been linked to perturbations in energy metabolism pathways. In this study, we demonstrate that long-chain (LC) acylcarnitines are active metabolites involved in the regulation of glucose metabolism in vivo. Single-dose administration of palmitoylcarnitine (PC) in fed mice induced marked insulin insensitivity, decreased glucose uptake in muscles, and elevated blood glucose levels. Increase in the content of LC acylcarnitine induced insulin resistance by impairing Akt phosphorylation at Ser473...
July 31, 2017: BioFactors
https://www.readbyqxmd.com/read/28758808/anti-m%C3%A3-llerian-hormone-in-type-2-and-gestational-diabetes-during-the-second-half-of-pregnancy-relationship-with-sexual-steroid-levels-and-metabolic-parameters
#13
Claudio Villarroel, Abril Salinas, Patricia López, Paulina Kohen, Gustavo Rencoret, Luigi Devoto, Ethel Codner
Hyperandrogenemia and hyperinsulinemia are observed in women with diabetes during pregnancy. The effect of diabetes on anti-Müllerian hormone (AMH) levels during pregnancy is unclear. The aim of this study was to determine the AMH levels in women with type 2 diabetes (T2D) and gestational diabetes (GD) compared to healthy (C) pregnant women during the second half of gestation. A prospective study of 69 pregnant women with T2D (N: 21), GD (N: 24) and C (N: 24) were followed up during the second half of pregnancy...
July 31, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28749784/concentrations-of-leptin-adiponectin-and-other-metabolic-parameters-in-non-obese-children-with-down-syndrome
#14
Nikhil Tenneti, Devi Dayal, Sheetal Sharda, Inusha Panigrahi, Mohammed Didi, Savita Verma Attri, Naresh Sachdeva, Anil Kumar Bhalla
BACKGROUND: Recent data indicates that adults with Down syndrome (DS) are at increased risk for cardiovascular disease (CVD) that significantly contributes to their morbidity and mortality. Although identification of cardiometabolic risk factors during childhood is desirable to design preventive interventions, the data on such risk factors in children with DS is scarce. The aim of this study was to study the cardiometabolic risk factors such as insulin resistance (IR), leptin and adiponectin concentrations, lipid abnormalities and leptin resistance in non-obese children with DS...
August 28, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28739602/loss-of-prion-protein-is-associated-with-the-development-of-insulin-resistance-and-obesity
#15
Giovanna Brito, Fernada C S Lupinacci, Flávio H Beraldo, Tiago G Santos, Martin Roffé, Marilene H Lopes, Vladmir C C de Lima, Vilma R Martins, Glaucia N M Hajj
Prion protein (PrP(C)) was initially described due to its involvement in transmissible spongiform encephalopathies. It was subsequently demonstrated to be a cell surface molecule involved in many physiological processes, such as vesicle trafficking. Herein, we investigated the roles of PrP(C) in the response to insulin and obesity development.  Two independent PrP(C) knockout (KO) and one PrP(C) overexpressing (TG20) mouse models were fed high-fat diets, and the development of insulin resistance and obesity was monitored...
July 24, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28739056/supplementation-with-vitis-vinifera-l-skin-extract-improves-insulin-resistance-and-prevents-hepatic-lipid-accumulation-and-steatosis-in-high-fat-diet-fed-mice
#16
Izabelle Barcellos Santos, Graziele Freitas de Bem, Viviane Silva Cristino Cordeiro, Cristiane Aguiar da Costa, Lenize Costa Reis Marins de Carvalho, Ana Paula Machado da Rocha, Gisele França da Costa, Dayane Teixeira Ognibene, Roberto Soares de Moura, Angela Castro Resende
Nonalcoholic fatty liver disease is one of the most common complications of obesity. The Vitis vinifera L. grape skin extract (ACH09) is an important source of polyphenols, which are related to its antioxidant and antihyperglycemic activities. We hypothesized that ACH09 could also exert beneficial effects on metabolic disorders associated with obesity and evaluated ACH09's influence on high-fat (HF) diet-induced hepatic steatosis and insulin resistance in C57BL/6 mice. The animals were fed a standard diet (10% fat, control) or an HF diet (60% fat, HF) with or without ACH09 (200mg/[kg d]) for 12weeks...
July 2017: Nutrition Research
https://www.readbyqxmd.com/read/28735644/fasting-as-possible-complementary-approach-for-polycystic-ovary-syndrome-hope-or-hype
#17
Benito Chiofalo, Antonio Simone Laganà, Vittorio Palmara, Roberta Granese, Giacomo Corrado, Emanuela Mancini, Salvatore Giovanni Vitale, Helena Ban Frangež, Eda Vrtačnik-Bokal, Onofrio Triolo
Polycystic ovary syndrome (PCOS) is a common endocrine system disorder among women of reproductive age. In several cases, PCOS women show infertility or subfertility and other metabolic alteration, such as insulin resistance (InsR), dyslipidaemia, hyperinsulinemia and obesity. Despite the aetiology of the syndrome is still far from be elucidated, it could be considered the result of concurrent endocrine modifications, lifestyle factors and genetic background. In particular, accumulating evidence suggests that InsR and compensatory hyperinsulinemia play a pivotal pathogenic role in the hyperandrogenism of many PCOS phenotypes, which in turn have a clear detrimental effect on chronic anovulation...
August 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28730823/pathophysiological-analysis-of-the-progression-of-hepatic-lesions-in-stam-mice
#18
T Saito, M Muramatsu, Y Ishii, Y Saigo, T Konuma, Y Toriniwa, K Miyajima, T Ohta
Nonalcoholic steatohepatitis (NASH) is a current health issue since the disease often leads to hepatocellular carcinoma; however, the pathogenesis of the disease has still not been fully elucidated. In this study, we investigated the pathophysiological changes observed in hepatic lesions in STAM mice, a novel NASH model. STAM mice, high fat-diet (HFD) fed mice, and streptozotocin (STZ) treated mice were prepared, and changes over time, such as biological parameters, mRNA expression, and histopathological findings, were evaluated once animal reached 5, 7, and 10 weeks of age...
July 18, 2017: Physiological Research
https://www.readbyqxmd.com/read/28727072/the-equine-glucose-dependent-insulinotropic-polypeptide-receptor-a-potential-therapeutic-target-for-insulin-dysregulation
#19
M H Kheder, M N Sillence, L M Bryant, M A de Laat
Metabolic disease is a significant problem that causes a range of species-specific comorbidities. Recently, a better understanding of glucose-dependent insulinotropic polypeptide (GIP) biology has led to the suggestion that inhibiting its action may attenuate obesity in several species. In horses, antagonism of GIP may also reduce hyperinsulinemia, which leads to insulin-associated laminitis, a painful comorbidity unique to this species. However, little is known about GIP in horses. The aims of this study were to examine the tissue distribution of equine GIP receptors (eGIPR), to determine whether eGIPR can be blocked using a GIP antagonist not tested previously in horses, and to establish whether there is any association between GIP concentrations and body mass in this species...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28724173/a-comparative-study-between-myo-inositol-and-metformin-in-the-treatment-of-insulin-resistant-women
#20
K Nas, L Tűű
OBJECTIVE: Insulin resistance (IR) is a common disorder, which can impair female fertility and is characterized by phenotypic heterogeneity. Life-style treatment and insulin sensitizers are commonly used in the management of women with IR and consequent hyperinsulinemia, in order to restore the normal endocrinological and clinical parameters. Metformin (MET) is considered one of the first approaches to this pathology but new evidences are showing promising results using myo-inositol (MYO) in the management of this pathology...
June 2017: European Review for Medical and Pharmacological Sciences
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