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https://www.readbyqxmd.com/read/28098594/mediators-of-diabetic-neuropathy-is-hyperglycemia-the-only-culprit
#1
Anna Grisold, Brian C Callaghan, Eva L Feldman
PURPOSE OF REVIEW: Diabetic peripheral neuropathy (DPN) is a disabling, highly prevalent complication of both type 1 and type 2 diabetes mellitus (T1DM and T2DM). Large clinical studies support the concept that, in addition to hyperglycemia, components of the metabolic syndrome (MetS) may underlie the pathogenesis of DPN, especially in T2DM. This review will present the evidence supporting the MetS and its individual components as potential causal factors for the development of neuropathy...
January 16, 2017: Current Opinion in Endocrinology, Diabetes, and Obesity
https://www.readbyqxmd.com/read/28096530/associations-between-body-mass-index-related-genetic-variants-and-adult-body-composition-the-fenland-cohort-study
#2
E A D Clifton, F R Day, E De Lucia Rolfe, N G Forouhi, S Brage, S J Griffin, N J Wareham, K K Ong
BACKGROUND/OBJECTIVE: Body mass index (BMI) is a surrogate measure of adiposity but does not distinguish fat from lean or bone mass. The genetic determinants of BMI are thought to predominantly influence adiposity but this has not been confirmed. Here we characterise the association between BMI-related genetic variants and body composition in adults. SUBJECTS/METHODS: Among 9667 adults aged 29-64 years from the Fenland study, a genetic risk score for BMI (BMI-GRS) was calculated for each individual as the weighted sum of BMI-increasing alleles across 96 reported BMI-related variants...
January 18, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28096262/cilia-and-obesity
#3
Christian Vaisse, Jeremy F Reiter, Nicolas F Berbari
The ciliopathies Bardet-Biedl syndrome and Alström syndrome cause obesity. How ciliary dysfunction leads to obesity has remained mysterious, partly because of a lack of understanding of the physiological roles of primary cilia in the organs and pathways involved in the regulation of metabolism and energy homeostasis. Historically, the study of rare monogenetic disorders that present with obesity has informed our molecular understanding of the mechanisms involved in nonsyndromic forms of obesity. Here, we present a framework, based on genetic studies in mice and humans, of the molecular and cellular pathways underlying long-term regulation of energy homeostasis...
January 17, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28095459/association-of-body-mass-index-with-dna-methylation-and-gene-expression-in-blood-cells-and-relations-to-cardiometabolic-disease-a-mendelian-randomization-approach
#4
Michael M Mendelson, Riccardo E Marioni, Roby Joehanes, Chunyu Liu, Åsa K Hedman, Stella Aslibekyan, Ellen W Demerath, Weihua Guan, Degui Zhi, Chen Yao, Tianxiao Huan, Christine Willinger, Brian Chen, Paul Courchesne, Michael Multhaup, Marguerite R Irvin, Ariella Cohain, Eric E Schadt, Megan L Grove, Jan Bressler, Kari North, Johan Sundström, Stefan Gustafsson, Sonia Shah, Allan F McRae, Sarah E Harris, Jude Gibson, Paul Redmond, Janie Corley, Lee Murphy, John M Starr, Erica Kleinbrink, Leonard Lipovich, Peter M Visscher, Naomi R Wray, Ronald M Krauss, Daniele Fallin, Andrew Feinberg, Devin M Absher, Myriam Fornage, James S Pankow, Lars Lind, Caroline Fox, Erik Ingelsson, Donna K Arnett, Eric Boerwinkle, Liming Liang, Daniel Levy, Ian J Deary
BACKGROUND: The link between DNA methylation, obesity, and adiposity-related diseases in the general population remains uncertain. METHODS AND FINDINGS: We conducted an association study of body mass index (BMI) and differential methylation for over 400,000 CpGs assayed by microarray in whole-blood-derived DNA from 3,743 participants in the Framingham Heart Study and the Lothian Birth Cohorts, with independent replication in three external cohorts of 4,055 participants...
January 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28095410/cardiomyocyte-regulation-of-systemic-lipid-metabolism-by-the-apolipoprotein-b-containing-lipoproteins-in-drosophila
#5
Sunji Lee, Hong Bao, Zachary Ishikawa, Weidong Wang, Hui-Ying Lim
The heart has emerged as an important organ in the regulation of systemic lipid homeostasis; however, the underlying mechanism remains poorly understood. Here, we show that Drosophila cardiomyocytes regulate systemic lipid metabolism by producing apolipoprotein B-containing lipoproteins (apoB-lipoproteins), essential lipid carriers that are so far known to be generated only in the fat body. In a Drosophila genetic screen, we discovered that when haplo-insufficient, microsomal triglyceride transfer protein (mtp), required for the biosynthesis of apoB-lipoproteins, suppressed the development of diet-induced obesity...
January 17, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28095377/associations-of-maternal-leptin-with-neonatal-adiposity-differ-according-to-pregravid-weight
#6
Julie Patenaude, Guillaume Lacerte, Marilyn Lacroix, Laetitia Guillemette, Catherine Allard, Myriam Doyon, Marie-Claude Battista, Julie Moreau, Julie Ménard, Jean-Luc Ardilouze, Patrice Perron, Marie-France Hivert
BACKGROUND: During pregnancy, maternal circulating leptin is released by maternal adipose tissue and the placenta, and may have a role in fetal development. OBJECTIVES: We investigated maternal leptinemia and glycemia associations with neonatal adiposity, taking into account pregravid weight status. METHODS: We included 235 pregnant women from the Genetics of Glucose Regulation in Gestation and Growth prospective cohort with data: blood samples collected during the 2nd trimester, an oral glucose tolerance test (OGTT), and the measured leptin and glucose levels...
January 18, 2017: Neonatology
https://www.readbyqxmd.com/read/28094877/hypothalamus-specific-re-introduction-of-snord116-into-otherwise-snord116-deficient-mice-increased-energy-expenditure
#7
Y Qi, L Purtell, M Fu, L Zhang, S Zolotukhin, L Campbell, H Herzog
The Snord116 gene cluster has been recognized as a critical contributor to the Prader-Willi Syndrome (PWS) with mice lacking Snord116 displaying many classical PWS phenotypes including low postnatal body weight, reduced bone mass and increased food intake. However, these mice do not develop obesity due to increased energy expenditure. To understand the physiological function of Snord116 better and potentially rescue the altered metabolism of Snord116(-/-) mice, we used an adeno-associated viral (AAV) approach to reintroduce the Snord116 gene product into the hypothalamus in Snord116(-/-) mice at different ages...
January 17, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28094778/adipocyte-fatty-acid-binding-protein-potentiates-toxic-lipids-induced-endoplasmic-reticulum-stress-in-macrophages-via-inhibition-of-janus-kinase-2-dependent-autophagy
#8
Ruby L C Hoo, Lingling Shu, Kenneth K Y Cheng, Xiaoping Wu, Boya Liao, Donghai Wu, Zhiguang Zhou, Aimin Xu
Lipotoxicity is implicated in the pathogenesis of obesity-related inflammatory complications by promoting macrophage infiltration and activation. Endoplasmic reticulum (ER) stress and adipocyte fatty acid binding protein (A-FABP) play key roles in obesity and mediate inflammatory activity through similar signaling pathways. However, little is known about their interplay in lipid-induced inflammatory responses. Here, we showed that prolonged treatment of palmitic acid (PA) increased ER stress and expression of A-FABP, which was accompanied by reduced autophagic flux in macrophages...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28094019/the-first-model-of-keeping-energy-balance-and-optimal-psycho-affective-development-breastfed-infants
#9
REVIEW
Carlo Agostoni, Alessandra Mazzocchi, Ludovica Leone, Valentina Ciappolino, Giuseppe Delvecchio, Carlo A Altamura, Paolo Brambilla
BACKGROUND: Breastfed infants follow a peculiar growth fashion characterized by a rapid weight gain in the first weeks of life, then followed by a fast decrease in growth rates, a capacity to self-regulate the sense of hungry and satiety, and a minor propensity towards overweight and obesity later on, in parallel with a better neurodevelopmental performance. METHODS: We searched studies investigating the relationship between the feeding mode in infancy and the energy balance, so the possible associations with total energy expenditure and intake regulation...
January 5, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28090739/obesity-related-genetic-polymorphisms-and-adiposity-indices-in-a-young-italian-population
#10
Laura Bordoni, Francesca Marchegiani, Marco Piangerelli, Valerio Napolioni, Rosita Gabbianelli
Pediatric obesity develops when a complex biological predisposition collides with an obesogenic environment. To further elucidate the role of genetics in obesity onset, we performed a candidate-gene association study in a young and sportive Italian population by testing the association of functional polymorphisms in ACE (rs4646994), FTO (rs9939609), MC4R (rs17782313) and PPARG (rs1801282) genes with body mass index (BMI) and waist-to-height ratio (WHtR). We also tested the combinations of identified risk genotypes and epistatic interactions among them to determine the existence of cumulative effects in predicting the predisposition to gain weight...
January 16, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28089486/molecular-genetics-of-human-obesity-a-comprehensive-review
#11
Rajan Kumar Singh, Permendra Kumar, Kulandaivelu Mahalingam
Obesity and its related health complications is a major problem worldwide. Hypothalamus and their signalling molecules play a critical role in the intervening and coordination with energy balance and homeostasis. Genetic factors play a crucial role in determining an individual's predisposition to the weight gain and being obese. In the past few years, several genetic variants were identified as monogenic forms of human obesity having success over common polygenic forms. In the context of molecular genetics, genome-wide association studies (GWAS) approach and their findings signified a number of genetic variants predisposing to obesity...
January 12, 2017: Comptes Rendus Biologies
https://www.readbyqxmd.com/read/28078092/severe-obesity-emotions-and-eating-habits-a-case-control-study
#12
M Koski, H Naukkarinen
BACKGROUND: Obesity has a multifaceted etiology that involves genetic, biological and behavioral factors, body growth, eating habits, energy expenditure and the function of adipose tissue. The present study aimed to expand upon knowledge about the relationships among obesity, emotions and eating habits in severely obese individuals using a case-control method. METHODS: The subject group consisted of 112 individuals (81 females and 31 males) receiving a permanent disability pension primarily for obesity...
2017: BMC Obesity
https://www.readbyqxmd.com/read/28078091/body-mass-index-measured-adiposity-and-population-attributability-of-associated-factors-a-population-based-study-from-buea-cameroon
#13
Leopold Ndemnge Aminde, Jeannine A Atem, Andre Pascal Kengne, Anastase Dzudie, J Lennert Veerman
BACKGROUND: Obesity is currently a global health challenge driven by a mix of behavioural, environmental and genetic factors. Up to date population-based disease burden estimates are needed to guide successful prevention and control efforts in African countries. We investigated the prevalence and population attributable fractions of overweight and obesity in Buea, the Southwest region of Cameroon. METHODS: Data are from a community-based cross-sectional study involving randomly selected adults conducted in 2016...
2017: BMC Obesity
https://www.readbyqxmd.com/read/28077863/what-have-human-experimental-overfeeding-studies-taught-us-about-adipose-tissue-expansion-and-susceptibility-to-obesity-and-metabolic-complications
#14
REVIEW
D J Cuthbertson, T Steele, J P Wilding, J C G Halford, J A Harrold, M Hamer, F Karpe
Overfeeding experiments, in which we impose short-term positive energy balance, help unravel the cellular, physiological and behavioural adaptations to nutrient excess. These studies mimic longer-term mismatched energy expenditure and intake. There is considerable inter-individual heterogeneity in the magnitude of weight gain when exposed to similar relative caloric excess reflecting variable activation of compensatory adaptive mechanisms. Significantly, given similar relative weight gain, individuals may be protected from/predisposed to metabolic complications (insulin resistance, dyslipidaemia, hypertension), non-alcoholic fatty liver disease and cardiovascular disease...
January 12, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28077318/alcohol-microbiome-life-style-influence-alcohol-and-non-alcoholic-organ-damage
#15
REVIEW
Manuela G Neuman, Samuel W French, Samir Zakhari, Stefen Malnick, Helmut K Seitz, Lawrence B Cohen, Mikko Salaspuro, Andreea Voinea Griffin, Andrei Barasch, Irina A Kirpich, Paul G Thomes, Laura W Schrum, Terrence M Donohue, Kusum Kharbanda, Marcus Cruz, Mihai Opris
This paper is based upon the "8th Charles Lieber's Satellite Symposium" organized by Manuela G. Neuman at the Research Society on Alcoholism Annual Meeting, onJune 25, 2016 at New Orleans, Louisiana, USA. The integrative symposium investigated different aspects of alcohol-induced liver disease (ALD) as well as non-alcohol-induced liver disease (NAFLD) and possible repair. We revealedthe basic aspects of alcohol metabolism that may be responsible for the development of liver diseaseas well as the factors that determine the amount, frequency and which type of alcohol misuse leads to liver and gastrointestinal diseases...
January 7, 2017: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/28077070/scopa-and-meta-scopa-software-for-the-analysis-and-aggregation-of-genome-wide-association-studies-of-multiple-correlated-phenotypes
#16
Reedik Mägi, Yury V Suleimanov, Geraldine M Clarke, Marika Kaakinen, Krista Fischer, Inga Prokopenko, Andrew P Morris
BACKGROUND: Genome-wide association studies (GWAS) of single nucleotide polymorphisms (SNPs) have been successful in identifying loci contributing genetic effects to a wide range of complex human diseases and quantitative traits. The traditional approach to GWAS analysis is to consider each phenotype separately, despite the fact that many diseases and quantitative traits are correlated with each other, and often measured in the same sample of individuals. Multivariate analyses of correlated phenotypes have been demonstrated, by simulation, to increase power to detect association with SNPs, and thus may enable improved detection of novel loci contributing to diseases and quantitative traits...
January 11, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28076762/a-leptin-analog-locally-produced-in-the-brain-acts-via-a-conserved-neural-circuit-to-modulate-obesity-linked-behaviors-in-drosophila
#17
Jennifer Beshel, Josh Dubnau, Yi Zhong
Leptin, a typically adipose-derived "satiety hormone," has a well-established role in weight regulation. Here we describe a functionally conserved model of genetically induced obesity in Drosophila by manipulating the fly leptin analog unpaired 1 (upd1). Unexpectedly, cell-type-specific knockdown reveals upd1 in the brain, not the adipose tissue, mediates obesity-related traits. Disrupting brain-derived upd1 in flies leads to all the hallmarks of mammalian obesity: increased attraction to food cues, increased food intake, and increased weight...
January 10, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28074555/pediatric-stress-from-neuroendocrinology-to-contemporary-disorders
#18
REVIEW
Stavroula Stavrou, Nicolas C Nicolaides, Elena Critselis, Christina Darviri, Evangelia Charmandari, George P Chrousos
BACKGROUND: Stress is defined as a state of threatened or perceived as threatened homeostasis. A broad spectrum of extrinsic or intrinsic, real or perceived stressful stimuli, called "stressors", activates a highly conserved system, the "stress system", which adjusts homeostasis through central and peripheral neuroendocrine responses. Inadequate, excessive or prolonged adaptive responses to stress may underlie the pathogenesis of several disease states prevalent in modern societies. The development and severity of these conditions primarily depend on the genetic vulnerability of the individual, the exposure to adverse environmental factors and the timing of the stressful event(s), given that prenatal life, infancy, childhood and adolescence are critical periods characterized by increased vulnerability to stressors...
January 11, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28073971/sexual-dimorphisms-in-genetic-loci-linked-to-body-fat-distribution
#19
Sara L Pulit, Tugce Karaderi, Cecilia M Lindgren
Obesity is a chronic condition associated with increased morbidity and mortality. Obesity confers an enormous burden on both individuals and public health more broadly. Body fat distribution is a heritable trait and a well-established predictor of adverse metabolic outcomes. Body fat distribution is distinct from overall obesity in measurement, but studies of body fat distribution can yield insights into the risk factors for and causes of overall obesity. Sexual dimorphism in body fat distribution is present throughout life...
January 10, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28073954/gene-obesogenic-environment-interactions-in-the-uk-biobank-study
#20
Jessica Tyrrell, Andrew R Wood, Ryan M Ames, Hanieh Yaghootkar, Robin N Beaumont, Samuel E Jones, Marcus A Tuke, Katherine S Ruth, Rachel M Freathy, George Davey Smith, Stéphane Joost, Idris Guessous, Anna Murray, David P Strachan, Zoltán Kutalik, Michael N Weedon, Timothy M Frayling
BACKGROUND: Previous studies have suggested that modern obesogenic environments accentuate the genetic risk of obesity. However, these studies have proven controversial as to which, if any, measures of the environment accentuate genetic susceptibility to high body mass index (BMI). METHODS: We used up to 120 000 adults from the UK Biobank study to test the hypothesis that high-risk obesogenic environments and behaviours accentuate genetic susceptibility to obesity...
January 10, 2017: International Journal of Epidemiology
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