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Leptin resistance

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https://www.readbyqxmd.com/read/28213613/an-atf4-atg5-signaling-in-hypothalamic-pomc-neurons-regulates-fat-mass-via-affecting-energy-expenditure
#1
Yuzhong Xiao, Yalan Deng, Feixiang Yuan, Tingting Xia, Hao Liu, Zhigang Li, Zhixue Liu, Hao Ying, Yi Liu, Qiwei Zhai, Shanghai Chen, Feifan Guo
Although many biological functions of activating transcription factor 4 (ATF4) have been identified, a role of hypothalamic ATF4 in the regulation of energy homeostasis is poorly understood. Here, we showed that hypothalamic pro-opiomelanocortin (POMC) neurons specific ATF4 knockout (PAKO) mice are lean and have higher energy expenditure. Furthermore, PAKO mice were resistant to high-fat diet (HFD)-induced obesity, glucose intolerance and leptin resistance. Moreover, the expression of autophagy protein 5 (ATG5) was increased or decreased by ATF4 knockdown or over-expression, respectively, and ATF4 inhibited the transcription of ATG5 by binding to the basic zipper-containing protein (bZIP) sites on its promoter...
February 17, 2017: Diabetes
https://www.readbyqxmd.com/read/28207876/circulating-c1q-complement-tnf-related-protein-ctrp-1-ctrp9-ctrp12-and-ctrp13-concentrations-in-type-2-diabetes-mellitus-in-vivo-regulation-by-glucose
#2
Bo Bai, Bo Ban, Zunjing Liu, Man Man Zhang, Bee Kang Tan, Jing Chen
OBJECTIVES: The C1q complement/TNF-related protein (CTRP) superfamily, which includes the adipokine adiponectin, has been shown in animal models to have positive metabolic and cardiovascular effects. We sought to investigate circulating CTRP1, CTRP9, CTRP12 and CTRP13 concentrations in persons with type 2 diabetes mellitus (T2DM), with age and BMI matched controls, and to examine the effects of a 2 hour 75g oral glucose tolerance test (OGTT) on serum CTRP1, CTRP9, CTRP12 and CTRP13 levels in persons with T2DM...
2017: PloS One
https://www.readbyqxmd.com/read/28193268/adipokines-insulin-resistance-and-adiposity-as-a-predictors-of-metabolic-syndrome-in-child-survivors-of-lymphoma-and-acute-lymphoblastic-leukemia-of-a-developing-country
#3
Lourdes Barbosa-Cortés, Mardia López-Alarcón, Juan Manuel Mejía-Aranguré, Miguel Klünder-Klünder, María Del Carmen Rodríguez-Zepeda, Hugo Rivera-Márquez, Alan de la Vega-Martínez, Jorge Martin-Trejo, Juan Shum-Luis, Karina Solis-Labastida, Enrique López-Aguilar, Guadalupe Matute-González, Roberto Bernaldez-Rios
BACKGROUND: There is a growing body of evidence indicating that pediatric survivors of cancer are at a greater risk of developing metabolic syndrome. This study evaluated some probable predictors of metabolic syndrome (MS), such as leptin and adiponectin concentrations, the leptin/adiponectin ratio, insulin resistance, and adiposity, in a sample of child survivors of lymphoma and leukemia in Mexico City. METHODS: Fifty two children (leukemia n = 26, lymphoma n = 26), who were within the first 5 years after cessation of therapy, were considered as eligible to participate in the study...
February 13, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28193219/the-effect-of-an-antenatal-lifestyle-intervention-in-overweight-and-obese-women-on-circulating-cardiometabolic-and-inflammatory-biomarkers-secondary-analyses-from-the-limit-randomised-trial
#4
Lisa J Moran, Louise M Fraser, Tulika Sundernathan, Andrea R Deussen, Jennie Louise, Lisa N Yelland, Rosalie M Grivell, Anne Macpherson, Matthew W Gillman, Jeffrey S Robinson, Julie A Owens, Jodie M Dodd
BACKGROUND: Maternal overweight and obesity during pregnancy is associated with insulin resistance, hyperglycaemia, hyperlipidaemia and a low-grade state of chronic inflammation. The aim of this pre-specified analysis of secondary outcome measures was to evaluate the effect of providing antenatal dietary and lifestyle advice on cardiometabolic and inflammatory biomarkers. METHODS: We conducted a multicentre trial in which pregnant women who were overweight or obese were randomised to receive either Lifestyle Advice or Standard Care...
February 14, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28191524/renin-angiotensin-aldosterone-system-in-insulin-resistance-and-metabolic-syndrome
#5
Undurti N Das
Obesity and its consequent complications such as hypertension and metabolic syndrome are increasing in incidence in almost all countries. Insulin resistance is common in obesity. Renin- angiotensin system (RAS) is an important target in the treatment of hypertension and drugs that act on RAS improve insulin resistance and decrease the incidence of type 2 diabetes mellitus, explaining the close association between hypertension and type 2 diabetes mellitus. RAS influences food intake by modulating the hypothalamic expression of neuropeptide Y and orexins via AMPK dephosphorylation...
June 1, 2016: Journal of Translational Internal Medicine
https://www.readbyqxmd.com/read/28185837/insulin-promotes-her2-signaling-activation-during-barrett-s-esophagus-carcinogenesis
#6
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/28185529/elevated-levels-of-adipokines-predict-outcome-after-acute-myocardial-infarction-a-long-term-follow-up-of-the-glucose-tolerance-in-patients-with-acute-myocardial-infarction-cohort
#7
Viveca Ritsinger, Kerstin Brismar, Klas Malmberg, Linda Mellbin, Per Näsman, Lars Rydén, Stefan Söderberg, Åke Tenerz, Anna Norhammar
OBJECTIVE: Adiponectin and leptin are associated with insulin resistance and cardiovascular disease. Information on the prognostic value after an acute myocardial infarction is still conflicting. METHODS: Patients (n = 180) without known diabetes and with admission glucose of <11 mmol/L admitted for an acute myocardial infarction in 1998-2000 were followed for mortality and cardiovascular events (first of cardiovascular mortality/acute myocardial infarction/stroke/heart failure) until the end of 2011 (median: 11...
March 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28180061/kinase-suppressor-of-ras-2-ksr2-expression-in-the-brain-regulates-energy-balance-and-glucose-homeostasis
#8
Lili Guo, Diane L Costanzo-Garvey, Deandra R Smith, Beth K Neilsen, Richard G MacDonald, Robert E Lewis
OBJECTIVE: Kinase Suppressor of Ras 2 (KSR2) is a molecular scaffold coordinating Raf/MEK/ERK signaling that is expressed at high levels in the brain. KSR2 disruption in humans and mice causes obesity and insulin resistance. Understanding the anatomical location and mechanism of KSR2 function should lead to a better understanding of physiological regulation over energy balance. METHODS: Mice bearing floxed alleles of KSR2 (KSR2(fl/fl)) were crossed with mice expressing the Cre recombinase expressed by the Nestin promoter (Nes-Cre) to produce Nes-CreKSR2(fl/fl) mice...
February 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28177684/aegle-marmelos-l-corr-impedes-onset-of-insulin-resistance-syndrome-in-rats-provided-with-drinking-fructose-from-weaning-to-adulthood-stages-of-development-a-mechanistic-study
#9
Rajani Mathur, Ratika Sehgal, Preeti Rajora, Shveta Sharma, Rajesh Kumar, Sandeep Mathur
To explore the effect of aqueous extract of leaves of Aegle marmelos (AM) on hepatic carbohydrate metabolism and insulin downstream signalling in rats provided with drinking fructose (15%) from weaning to adulthood. Wistar albino rats (4week) were randomly divided into Normal Control (NC), Fructose Control (FC) and treatment (AMT) groups and provided over 8 weeks, chow + water, chow + fructose (15%) and chow + fructose (15%) + AM (500 mg/kg/d, p.o.), respectively. Significantly (p<0.05) raised levels of Fasting Blood Glucose, lipid, visceral weight, plasma insulin and leptin, glycogen, gluconeogenesis enzyme levels but decreased glycolytic enzyme activity was recorded in FC as compared to NC...
December 17, 2016: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28167244/impact-of-risperidone-on-leptin-and-insulin-in-children-and-adolescents-with-autistic-spectrum-disorders
#10
Pornpen Srisawasdi, Natchaya Vanwong, Yaowaluck Hongkaew, Apichaya Puangpetch, Somlak Vanavanan, Boontarika Intachak, Nattawat Ngamsamut, Penkhae Limsila, Chonlaphat Sukasem, Martin H Kroll
OBJECTIVE: To evaluate the influence of dose and duration of risperidone treatment on cardiovascular and diabetes risk biomarkers in children and adolescents with autistic spectrum disorders (ASDs). DESIGN AND METHODS: In this cross-sectional analysis, a total of 168 ASDs patients (89% male) treated with a risperidone-based regimen for ≥12months were included. Blood samples were analyzed for glucose and lipid metabolic markers, adiponectin, leptin, prolactin, cortisol and high sensitive C-reactive protein...
February 3, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28165482/pharmacological-inhibition-of-c-jun-n-terminal-kinase-reduces-food-intake-and-sensitizes-leptin-s-anorectic-signaling-actions
#11
Su Gao, Shannon Howard, Philip V LoGrasso
The role for c-Jun N-terminal Kinase (JNK) in the control of feeding and energy balance is not well understood. Here, by use of novel and highly selective JNK inhibitors, we investigated the actions of JNK in the control of feeding and body weight homeostasis. In lean mice, intraperitoneal (i.p.) or intracerebroventricular (i.c.v.) administration of SR-3306, a brain-penetrant and selective pan-JNK (JNK1/2/3) inhibitor, reduced food intake and body weight. Moreover, i.p. and i.c.v. administrations of SR11935, a brain-penetrant and JNK2/3 isoform-selective inhibitor, exerted similar anorectic effects as SR3306, which suggests JNK2 or JNK3 mediates aspect of the anorectic effect by pan-JNK inhibition...
February 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28164072/leptin-and-adiponectin-levels-in-girls-with-central-precocious-puberty-before-and-during-gnrh-agonist-treatment
#12
Jae Won Yoo, Chun Woo Song, Han Hyuk Lim
PURPOSE: The effects of gonadotropin-releasing hormone agonist (GnRHa) treatment on the energy metabolism in girls with central precocious puberty (CPP) are controversial. We focused the changes and related factors of serum levels of leptin and adiponectin in girls with CPP before and during GnRHa treatment. METHODS: Thirty girls with idiopathic CPP were enrolled in the study. Their auxological data and fasting blood were collected at the baseline and after six months of GnRHa treatment...
December 2016: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28161303/comparison-of-exenatide-and-acarbose-on-intra-abdominal-fat-content-in-patients-with-obesity-and-type-2-diabetes-a-randomized-controlled-trial
#13
Li Shi, Jing Zhu, Ping Yang, Xiaoqiang Tang, Wenlong Yu, Changjie Pan, Moyu Shen, Dalong Zhu, Jinluo Cheng, Xinhua Ye
OBJECTIVE: To investigate exenatide, a GLP-1 analogue, compared with acarbose, for intra-abdominal fat reduction in patients with obesity and type-2 diabetes. METHODS: This randomized controlled trial included 36 patients with obesity and type-2 diabetes, who were metformin-unresponsive, receiving metformin/exenatide (GLP-1 group) or metformin/acarbose (control group) for 3 months. Primary end-point: intra-abdominal fat content from baseline to 3 months; Secondary end-points: changes in fasting blood glucose, glycated haemoglobin (HbAlc), fasting insulin, blood lipids, weight, body mass index, and inflammatory cytokines from baseline to 3 months...
February 1, 2017: Obesity Research & Clinical Practice
https://www.readbyqxmd.com/read/28160769/the-common-genetic-variant-of-insig2-gene-rs7566605-polymorphism-is-associated-with-severe-obesity-in-north-india
#14
Jai Prakash, Balraj Mittal, Srivastava Apurva, Awasthi Shally, Srivastava Pranjal, Srivastava Neena
Background: Obesity is a very common disorder resulting from an imbalance between food intake and energy expenditure, and it has a substantial impact on the development of chronic diseases. The aim of this study was to examine the association of insig2 (rs7566605) gene polymorphism with obesity and obesity associated phenotypes in North Indian subjects. Methods: The variants were investigated for association in 642 obese and non-obese individuals. The genotyping of insig2 (rs7566605) single nucleotide polymorphism was analyzed by the TaqMan allelic discrimination protocol...
5, 2017: Iranian Biomedical Journal
https://www.readbyqxmd.com/read/28153991/sex-based-differences-in-cardiometabolic-biomarkers
#15
Jeanney Lew, Monika Sanghavi, Colby R Ayers, Darren K McGuire, Torbjørn Omland, Dorothee Atzler, Maria O Gore, Ian Neeland, Jarett D Berry, Amit Khera, Anand Rohatgi, James A de Lemos
BACKGROUND: Few data are available comparing cardiovascular disease (CVD) biomarker profiles between women and men in the general population. We analyzed sex-based differences in multiple biomarkers reflecting distinct pathophysiological pathways, accounting for differences between women and men in CVD risk factors, body composition, and cardiac morphology. METHODS: A cross-sectional analysis was performed using data from the Dallas Heart Study, a multiethnic population-based study...
February 7, 2017: Circulation
https://www.readbyqxmd.com/read/28146130/effects-of-natural-products-on-fructose-induced-nonalcoholic-fatty-liver-disease-nafld
#16
REVIEW
Qian Chen, Tingting Wang, Jian Li, Sijian Wang, Feng Qiu, Haiyang Yu, Yi Zhang, Tao Wang
As a sugar additive, fructose is widely used in processed foods and beverages. Excessive fructose consumption can cause hepatic steatosis and dyslipidemia, leading to the development of metabolic syndrome. Recent research revealed that fructose-induced nonalcoholic fatty liver disease (NAFLD) is related to several pathological processes, including: (1) augmenting lipogenesis; (2) leading to mitochondrial dysfunction; (3) stimulating the activation of inflammatory pathways; and (4) causing insulin resistance...
January 31, 2017: Nutrients
https://www.readbyqxmd.com/read/28144254/blood-pressure-dyslipidemia-and-inflammatory-factors-are-related-to-body-mass-index-in-scholar-adolescents
#17
Hanane Ghomari-Boukhatem, Assia Bouchouicha, Khedidja Mekki, Karima Chenni, Mohamed Belhadj, Malika Bouchenak
INTRODUCTION: Obesity is associated with increased occurrence of numerous diseases, including hypertension, dyslipidemia, insulin resistance, diabetes, and atherosclerosis. Blood pressure (BP), dyslipidemia, and inflammation markers and their relationships with body mass index (BMI) were determined in scholar adolescents. MATERIAL AND METHODS: Adolescents (n = 210) (sex ratio G/B = 106/104; 11 to 16 years) were recruited in three colleges of Oran city. Anthropometric parameters were measured to classify adolescents as thin (T), normal weight (NW), overweight (OW), or obese (O)...
February 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28139438/fgf21-deficiency-is-associated-with-childhood-obesity-insulin-resistance-and-hypoadiponectinaemia-the-bcams-study
#18
G Li, J Yin, J Fu, L Li, S F A Grant, C Li, M Li, J Mi, M Li, S Gao
OBJECTIVE: Fibroblast growth factor 21 (FGF21) exerts beneficial effects on metabolic homoeostasis and has been reported to be regulated by adiponectin, leptin and resistin. However, while an association between increased circulating FGF21 and metabolic disorders has been reported in adults, paediatric-specific data are lacking. DESIGN AND METHODS: This study investigated the relationship between FGF21 levels and obesity, insulin resistance (IR), the metabolic syndrome (MetS) and adipokines (adiponectin, leptin and resistin) in a cohort of 3231 Chinese youngsters aged 6-18...
January 27, 2017: Diabetes & Metabolism
https://www.readbyqxmd.com/read/28134848/insulin-production-and-resistance-in-different-models-of-diet-induced-obesity-and-metabolic-syndrome
#19
Salamah M Alwahsh, Benjamin J Dwyer, Shareen Forbes, David H van Thiel, Philip J Starkey Lewis, Giuliano Ramadori
The role of the liver and the endocrine pancreas in development of hyperinsulinemia in different types of obesity remains unclear. Sedentary rats (160 g) were fed a low-fat-diet (LFD, chow 13% kcal fat), high-fat-diet (HFD, 35% fat), or HFD+ 30% ethanol+ 30% fructose (HF-EFr, 22% fat). Overnight-fasted rats were culled after one, four or eight weeks. Pancreatic and hepatic mRNAs were isolated for subsequent RT-PCR analysis. After eight weeks, body weights increased three-fold in the LFD group, 2.8-fold in the HFD group, and 2...
January 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28131832/treatment-of-obese-asthma-in-a-mouse-model-by-simvastatin-is-associated-with-improving-dyslipidemia-and-decreasing-leptin-level
#20
Wei Han, Jun Li, Huaping Tang, Lixin Sun
Obesity can cause or worsen asthma. Compared with common asthma, obese asthma is difficult to control. Statins are effective serum cholesterol-lowering agents in clinical practice, and they also have anti-inflammatory properties, which in theory are potentially beneficial in asthma. Many studies have shown that simvastatin has good therapeutic effect in animal models of asthma. However, the therapeutic effect and action mechanism of simvastatin for obese asthma remain unclear. Leptin, a satiety hormone, is in positive correlation with total body fat mass and may also play a significant role in the pathogenesis of asthma...
January 25, 2017: Biochemical and Biophysical Research Communications
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