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Hyperinsulinemia

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https://www.readbyqxmd.com/read/28222755/wd-repeat-protein-wdr13-is-a-novel-transcriptional-regulator-of-c-jun-and-modulates-intestinal-homeostasis-in-mice
#1
Vijay Pratap Singh, Saritha Katta, Satish Kumar
BACKGROUND: WDR13 is a member of the WD repeat protein family and is expressed in several tissues of human and mice. Previous studies in our laboratory showed that the lack of this gene in mice resulted in mild obesity, hyperinsulinemia, enhanced beta cell proliferation and protection from inflammation. However, the molecular mechanism of WDR13 action is not well understood. METHODS: In the present study, we used AOM/DSS to induce colitis-mediated colorectal tumor after establishing expression of Wdr13 gene in colon...
February 21, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28212470/-prediabetes-as-a-riskmarker-for-stress-induced-hyperglycemia-in-critically-ill-adults
#2
Diego Jesús García-Gallegos, Eliseo Luis-López
BACKGROUND: It is not known if patients with prediabetes, a subgroup of non-diabetic patients that usually present hyperinsulinemia, have higher risk to present stress-induced hyperglycemia. The objective was to determine if prediabetes is a risk marker to present stress-induced hyperglycemia. METHODS: Analytic, observational, prospective cohort study of non-diabetic critically ill patients of a third level hospital. We determined plasmatic glucose and glycated hemoglobin (HbA1c) at admission to diagnose stress-induced hyperglycemia (glucose ≥ 140 mg/dL) and prediabetes (HbA1c between 5...
2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/28208845/role-of-altered-venous-blood-lactate-and-hba1c-in-women-with-gestational-diabetes-mellitus
#3
C S Nagalakshmi, N U Santhosh, N Krishnamurthy, Chethana Chethan, M K Shilpashree
INTRODUCTION: Being a mirror image of metabolic syndrome, Gestational Diabetes Mellitus (GDM) is associated with significant maternal and fetal morbidity. Increased blood lactate concentration and alterations of substrate utilization are partly involved in development of insulin resistance in GDM. Fetuses born to such mothers have shown low umbilical vein oxygen saturation and low oxygen content and increased lactate concentrations. These changes may certainly reflect enhanced fetal metabolism as a result of hyperglycaemia and hyperinsulinemia and therefore, these fetuses deserve intense surveillance at term and during delivery...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28202863/paroxysmal-hypertension-induced-by-an-insulinoma
#4
Ko Harada, Yoshihisa Hanayama, Kou Hasegawa, Masaya Iwamuro, Hideharu Hagiya, Ryuichi Yoshida, Fumio Otsuka
Insulinoma is a rare, usually benign, pancreatic neuroendocrine tumor. The clinical features of an insulinoma are fasting hypoglycemia with neuroglycopenic symptoms including confusion and unusual behavior, while hypertension is usually not associated with the disease. We herein report a patient with insulinoma who manifested paroxysmal hypertension and neuroglycopenic symptoms. The possible etiology of hypertension induced by an insulinoma is catecholamine release in response to hypoglycemia, which may cause acute hypertension through activation of the sympatho-adrenal system...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28196954/metformin-and-thyroid-disease
#5
Xianghui Meng, Shuhang Xu, Guofang Chen, Michael Derwahl, Chao Liu
An intriguing area of research in thyroidology is the recently discovered association of insulin resistance with thyroid functional and morphological abnormalities. Individuals with hyperinsulinemia have larger thyroid gland and a higher prevalence of thyroid nodules and cancer. Accordingly, patients treated with metformin have a smaller thyroid volume and a lower risk of incident goiter, thyroid nodule and cancer. Multiple studies in vitro and in vivo have demonstrated that metformin can inhibit the growth of thyroid cells and different types of thyroid cancer cells by affecting the insulin/IGF-1 and mTOR pathways...
February 14, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28194671/activation-of-insulin-pi3k-akt-p70s6k-pathway-in-hepatic-stellate-cells-contributes-to-fibrosis-in-nonalcoholic-steatohepatitis
#6
Cindy X Cai, Hema Buddha, Shobha Castelino-Prabhu, Zhiwei Zhang, Robert S Britton, Bruce R Bacon, Brent A Neuschwander-Tetri
BACKGROUND AND AIMS: Hyperinsulinemia and insulin resistance are hallmark features of nonalcoholic fatty liver disease and steatohepatitis (NASH). It remains unclear whether and how insulin contributes to the development of fibrosis in NASH. In this study, we explored insulin signaling in the regulation of hepatic stellate cell (HSC) activation and the progression of NASH-fibrosis. METHODS: Phosphorylation of Akt and p70S6K were examined in primary HSC and in a rat model of NASH-fibrosis induced by high-fat and high-cholesterol diet for 24 weeks...
February 13, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28185837/insulin-promotes-her2-signaling-activation-during-barrett-s-esophagus-carcinogenesis
#7
Diletta Arcidiacono, Alessandro Antonello, Matteo Fassan, Daniele Nucci, Tiziana Morbin, Marco Agostini, Donato Nitti, Massimo Rugge, Alfredo Alberti, Giorgio Battaglia, Stefano Realdon
BACKGROUND: Insulin-resistance and hyperinsulinemia could have a role in the growing incidence of esophageal adenocarcinoma (EAC) and its pre-cancerous lesion Barrett's Esophagus (BE). HER2 activation has also a pivotal role in EAC carcinogenesis but no data correlate these two phenomena in this disease context. AIMS: To investigate the role of hyperinsulinemia in BE-dysplasia-adenocarcinoma sequence and the possible relationship between insulin-mediated and HER2 signaling in EAC development...
January 22, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28184213/loss-of-hepatic-ceacam1-a-unifying-mechanism-linking-insulin-resistance-to-obesity-and-non-alcoholic-fatty-liver-disease
#8
REVIEW
Garrett Heinrich, Hilda E Ghadieh, Simona S Ghanem, Harrison T Muturi, Khadijeh Rezaei, Qusai Y Al-Share, Thomas A Bowman, Deqiang Zhang, Robert S Garofalo, Lei Yin, Sonia M Najjar
The pathogenesis of human non-alcoholic fatty liver disease (NAFLD) remains unclear, in particular in the context of its relationship to insulin resistance and visceral obesity. Work on the carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) in mice has resolved some of the related questions. CEACAM1 promotes insulin clearance by enhancing the rate of uptake of the insulin-receptor complex. It also mediates a negative acute effect of insulin on fatty acid synthase activity. This positions CEACAM1 to coordinate the regulation of insulin and lipid metabolism...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28179267/obesity-and-pregnancy-mechanisms-of-short-term-and-long-term-adverse-consequences-for-mother-and-child
#9
REVIEW
Patrick M Catalano, Kartik Shankar
Obesity is the most common medical condition in women of reproductive age. Obesity during pregnancy has short term and long term adverse consequences for both mother and child. Obesity causes problems with infertility, and in early gestation it causes spontaneous pregnancy loss and congenital anomalies. Metabolically, obese women have increased insulin resistance in early pregnancy, which becomes manifest clinically in late gestation as glucose intolerance and fetal overgrowth. At term, the risk of cesarean delivery and wound complications is increased...
February 8, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28177677/mtorc1-inhibitors-rapamycin-and-metformin-affect-cardiovascular-markers-differentially-in-zdf-rats
#10
Ravi Nistala, Ahmad Raja, Lakshmi Pulakat
Mammalian target for rapamycin complex 1 (mTORC1) is a common target for the action of immunosuppressant macrolide rapamycin and glucose lowering metformin. Inhibition of mTORC1 can exert both beneficial and detrimental effects in different pathologies. Here we investigated the differential effects of rapamycin (1.2mg/kg/day delivered subcutaneously for six weeks) and metformin (300mg/kg/day delivered orally for 11 weeks) treatments on male Zucker diabetic fatty (ZDF) rats that mimic the cardio-renal pathology of T2DM patients and progress to insulin insufficiency...
January 4, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28176216/pcsk9-targets-important-for-lipid-metabolism
#11
Rainer Schulz, Klaus-Dieter Schlüter
Ischemic heart disease is the main cause of death worldwide and it is accelerated by increased low-density lipoprotein (LDL) cholesterol (LDL-C) and/or lipoprotein (a) (Lp(a)) concentrations. Proprotein convertase subtilisin/kexin type 9 (PCSK9) alters both LDL-C and in part Lp(a) concentrations through its ability to induce degradation of the LDL receptor (LDLR). PCSK9, however, has additional targets which are potentially involved in lipid metabolism regulation such as the very low density lipoprotein receptor (VLDL), CD36 (cluster of differentiation 36) and the epithelial cholesterol transporter (NPC1L1) and it affects expression of apolipoprotein B48...
February 7, 2017: Clinical Research in Cardiology Supplements
https://www.readbyqxmd.com/read/28174292/hypothalamic-and-striatal-insulin-action-suppresses-endogenous-glucose-production-and-may-stimulate-glucose-uptake-during-hyperinsulinemia-in-lean-but-not-in-overweight-men
#12
Martin Heni, Robert Wagner, Stephanie Kullmann, Sofiya Gancheva, Michael Roden, Andreas Peter, Norbert Stefan, Hubert Preissl, Hans Ulrich Häring, Andreas Fritsche
Intranasal spray application facilitates insulin delivery to the human brain. Although brain insulin modulates peripheral metabolism, the mechanisms involved remain elusive.Twenty-one men underwent two hyperinsulinemic-euglycemic clamps with D-[6,6-(2)H2]-glucose infusion to measure endogenous glucose production and glucose disappearance. On two days, participants received intranasal insulin or placebo. Insulin spillover into circulation after intranasal insulin application was mimicked by an iv insulin bolus on placebo day...
February 7, 2017: Diabetes
https://www.readbyqxmd.com/read/28164885/a-study-of-the-association-of-acanthosis-nigricans-with-subclinical-atherosclerosis
#13
Elizabeth Guevara-Gutiérrez, Alberto Tlacuilo-Parra, Pedro Gutiérrez-Fajardo, Tania Sánchez-Tenorio, Fernando Barba-Gómez, Alejandra Miranda-Díaz
BACKGROUND: Hyperinsulinism is related to the presence of acanthosis nigricans and atherosclerosis; however, we were unable to find any study on the prevalence of atherosclerosis in acanthosis nigricans. AIMS: To evaluate the prevalence of carotid atherosclerosis and metabolic alterations in Mexican patients with acanthosis nigricans. METHODS: We carried out a cross-sectional study that included 45 patients with acanthosis nigricans, age- and gender-matched with 45 healthy participants...
March 2017: Indian Journal of Dermatology, Venereology and Leprology
https://www.readbyqxmd.com/read/28164076/systemic-primary-carnitine-deficiency-with-hypoglycemic-encephalopathy
#14
Jae Sung Jun, Eun Joo Lee, Hyung Doo Park, Hae Sook Kim
Acute hypoglycemia in children is not an uncommon disease that can be encountered in the Emergency Department. Most cases of childhood hypoglycemia are caused by ketotic hypoglycemia due to missed meals. Often, hypoketotic hypoglycemia can also occur, which suggests hyperinsulinemia or a defect in fatty acid oxidation. Carnitine is essential for long chain fatty acids transfer into mitochondria for oxidation. We present a case of systemic primary carnitine deficiency who presented with seizures due to hypoketotic hypoglycemia...
December 2016: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28164075/the-impact-of-obesity-on-hyperandrogenemia-in-korean-girls
#15
Min Jae Kang, Seung Yang, Il Tae Hwang
PURPOSE: As metabolic complication and polycystic ovarian syndrome due to childhood obesity is rising, the role of hyperandrogenemia (HA) and hyperinsulinism is receiving attention. The aims of this study were to investigate the presence of obvious HA according to pubertal status and to find potential etiologic determinants of HA in Korean obese (OB) girls. METHODS: We analyzed 91 girls aged 6-17 years (prepuberty, n=54; puberty, n=37). Each girl was classified as being either normal weight (NW) or OB...
December 2016: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28161095/environmental-obesogen-tributyltin-chloride-leads-to-abnormal-hypothalamic-pituitary-gonadal-axis-function-by-disruption-in-kisspeptin-leptin-signaling-in-female-rats
#16
Gabriela C Sena, Leandro C Freitas-Lima, Eduardo Merlo, Priscila L Podratz, Julia F P de Araújo, Poliane A A Brandão, Maria T W D Carneiro, Marina C Zicker, Adaliene V M Ferreira, Christina M Takiya, Carolina M de Lemos Barbosa, Marcelo M Morales, Ana Paula Santos-Silva, Leandro Miranda-Alves, Ian V Silva, Jones B Graceli
Tributyltin chloride (TBT) is a xenobiotic used as a biocide in antifouling paints that has been demonstrated to induce endocrine-disrupting effects, such as obesity and reproductive abnormalities. An integrative metabolic control in the hypothalamus-pituitary-gonadal (HPG) axis was exerted by leptin. However, studies that have investigated the obesogenic TBT effects on the HPG axis are especially rare. We investigated whether metabolic disorders as a result of TBT are correlated with abnormal hypothalamus-pituitary-gonadal (HPG) axis function, as well as kisspeptin (Kiss) action...
March 15, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28158916/acute-recapitulation-of-the-hyperinsulinemia-and-hyperlipidemia-characteristic-of-metabolic-syndrome-suppresses-gonadotropins
#17
Justin Chosich, Andrew P Bradford, Amanda A Allshouse, Jane E B Reusch, Nanette Santoro, Irene E Schauer
OBJECTIVE: To determine the effect of lipid/heparin versus saline infusion, with or without concurrent euglycemic hyperinsulinemia, on serum follicle-stimulating hormone (FSH) and luteinizing hormone (LH). Obesity is associated with hyperlipidemia, insulin resistance, and relative hypogonadotropic hypogonadism. It was hypothesized that acutely elevated fatty acids and insulin would impair gonadotropin secretion. METHODS: Regularly cycling women and men without obesity underwent a crossover 6-hour infusion study over four visits...
February 3, 2017: Obesity
https://www.readbyqxmd.com/read/28154178/green-tea-polyphenol-epigallocatechin-3-gallate-suppresses-toll-like-receptor-4-expression-via-upregulation-of-e3-ubiquitin-protein-ligase-rnf216
#18
Motofumi Kumazoe, Yuki Nakamura, Mai Yamashita, Takashi Suzuki, Kanako Takamatsu, Yuhui Huang, Jaehoon Bae, Shuya Yamashita, Motoki Murata, Shuhei Yamada, Yuki Shinoda, Wataru Yamaguchi, Yui Toyoda, Hirofumi Tachibana
Toll-like receptor 4 (TLR4) plays an essential role in innate immunity through inflammatory cytokine induction. Recent studies demonstrated that the abnormal activation of TLR4 has a pivotal role in obesity-induced inflammation, which is associated with several diseases, including hyperinsulinemia, hypertriglyceridemia, and cardiovascular disease. Here we demonstrate that (-)-epigallocatechin-3-O-gallate, a natural agonist of the 67-kDa laminin receptor (67LR), suppressed TLR4 expression through E3 ubiquitin-protein ring finger protein 216 (RNF216) upregulation...
February 1, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28153881/prevention-of-diet-induced-metabolic-dysregulation-inflammation-and-atherosclerosis-in-ldlr-mice-by-treatment-with-the-atp-citrate-lyase-inhibitor-bempedoic-acid
#19
Joshua P Samsoondar, Amy C Burke, Brian G Sutherland, Dawn E Telford, Cynthia G Sawyez, Jane Y Edwards, Stephen L Pinkosky, Roger S Newton, Murray W Huff
OBJECTIVE: Bempedoic acid (ETC-1002, 8-hydroxy-2,2,14,14-tetramethylpentadecanedioic acid) is a novel low-density lipoprotein cholesterol-lowering compound. In animals, bempedoic acid targets the liver where it inhibits cholesterol and fatty acid synthesis through inhibition of ATP-citrate lyase and through activation of AMP-activated protein kinase. In this study, we tested the hypothesis that bempedoic acid would prevent diet-induced metabolic dysregulation, inflammation, and atherosclerosis...
February 2, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28153594/dose-dependent-effect-of-bisphenol-a-on-insulin-signaling-molecules-in-cardiac-muscle-of-adult-male-rat
#20
Preethi Sivashanmugam, Vigneswari Mullainadhan, Balasubramanian Karundevi
Environmental contaminant, Bisphenol-A (BPA) is a xenoestrogen, an essential component used for the production of two classes of polymers such as polycarbonate and epoxy resin which disrupts the normal endocrine function. BPA has intense effects on mice endocrine pancreas, an essential tissue involved in glucose metabolism. It disrupts pancreatic β-cell insulin content, induces hyperinsulinemia and insulin resistance in male rats. Cardiac muscle is an insulin responsive organ and insulin has direct effects on glucose transport...
January 30, 2017: Chemico-biological Interactions
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