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obesity and genetic

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https://www.readbyqxmd.com/read/28650578/intake-of-energy-and-protein-is-associated-with-overweight-risk-at-age-5-5-years-results-from-the-prospective-teddy-study
#1
Andreas Beyerlein, Ulla M Uusitalo, Suvi M Virtanen, Kendra Vehik, Jimin Yang, Christiane Winkler, Mathilde Kersting, Sibylle Koletzko, Desmond Schatz, Carin Andrén Aronsson, Helena Elding Larsson, Jeffrey P Krischer, Anette-G Ziegler, Jill M Norris, Sandra Hummel
OBJECTIVE: The associations of energy, protein, carbohydrate, and fat intake with weight status up to the age of 5.5 years were prospectively assessed in The Environmental Determinants of Diabetes in the Young (TEDDY) study. METHODS: Food record data (over 3 days) and BMI measurements between 0.25 and 5.5 years were available from 5,563 children with an increased genetic risk for type 1 diabetes followed from shortly after birth. Odds ratios (ORs) were calculated for overweight and obesity by previous intake of energy, protein, carbohydrate, and fat with adjustment for potential confounders...
June 26, 2017: Obesity
https://www.readbyqxmd.com/read/28650457/fibroblast-growth-factor-19-regulates-skeletal-muscle-mass-and-ameliorates-muscle-wasting-in-mice
#2
Bérengère Benoit, Emmanuelle Meugnier, Martina Castelli, Stéphanie Chanon, Aurélie Vieille-Marchiset, Christine Durand, Nadia Bendridi, Sandra Pesenti, Pierre-Axel Monternier, Anne-Cécile Durieux, Damien Freyssenet, Jennifer Rieusset, Etienne Lefai, Hubert Vidal, Jérôme Ruzzin
The endocrine-derived hormone fibroblast growth factor (FGF) 19 has recently emerged as a potential target for treating metabolic disease. Given that skeletal muscle is a key metabolic organ, we explored the role of FGF19 in that tissue. Here we report a novel function of FGF19 in regulating skeletal muscle mass through enlargement of muscle fiber size, and in protecting muscle from atrophy. Treatment with FGF19 causes skeletal muscle hypertrophy in mice, while physiological and pharmacological doses of FGF19 substantially increase the size of human myotubes in vitro...
June 26, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28648981/leptin-s-physiologic-role-does-the-emperor-of-energy-balance-have-no-clothes
#3
REVIEW
Jeffrey S Flier, Eleftheria Maratos-Flier
The discovery of the obese gene and the demonstration that its encoded protein leptin can reverse obesity due to genetic deficiency of the hormone were landmark discoveries in endocrinology and metabolism. Regarding leptin's role in physiology, it is now established that falling leptin levels are a key signal of the starved state in mice and humans. Repleting leptin reverses the starvation signal both in physiologic starvation and in obesity resulting from genetic leptin deficiency. Since its discovery, it has also been hypothesized that rising leptin levels caused by overfeeding provide a physiologic signal that orchestrates resistance to obesity...
June 19, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28648584/control-of-lipid-droplet-fusion-and-growth-by-cide-family-proteins
#4
REVIEW
Guangang Gao, Feng-Jung Chen, Linkang Zhou, Lu Su, Dijin Xu, Li Xu, Peng Li
Cell death-inducing DFF45-like effector (CIDE) family proteins including Cidea, Cideb and Cidec/Fsp27 are expressed in many different tissues and are known as lipid droplet (LD)-and ER-associated proteins. Systematic analyses using genetically modified animal models have demonstrated that CIDE proteins play important roles in regulating various aspects of lipid homeostasis, including lipid storage, lipolysis and lipid secretion. Recent research in ours and other laboratories has revealed that CIDE proteins are crucial regulators of LD fusion and growth in the adipose tissue, liver, skin and mammary glands...
June 22, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28645872/two-obesity-susceptibility-loci-in-lyplal1-and-etv5-independently-associated-with-childhood-hypertension-in-chinese-population
#5
Duo Lv, Dan Zhou, Yan Zhang, Shuai Zhang, Yi-Min Zhu
AIMS: Genome-wide association studies have identified novel obesity-associated susceptibility loci. Associations of these variants with childhood obesity have been studied in our previous research. The purpose of this study is to investigate if these loci are associated with hypertension being independent of obesity in Chinese children and adolescents. METHODS: Nineteen candidate SNPs were genotyped using Sequenom MassARRAY platform among Chinese children (N=2954, 514 hypertension and 2440 controls, aged 7-17years)...
June 20, 2017: Gene
https://www.readbyqxmd.com/read/28645627/does-higher-education-protect-against-obesity-evidence-using-mendelian-randomization
#6
Petri Böckerman, Jutta Viinikainen, Laura Pulkki-Råback, Christian Hakulinen, Niina Pitkänen, Terho Lehtimäki, Jaakko Pehkonen, Olli T Raitakari
OBJECTIVES: The aim of this explorative study was to examine the effect of education on obesity using Mendelian randomization. METHODS: Participants (N=2011) were from the on-going nationally representative Young Finns Study (YFS) that began in 1980 when six cohorts (aged 30, 33, 36, 39, 42 and 45 in 2007) were recruited. The average value of BMI (kg/m(2)) measurements in 2007 and 2011 and genetic information were linked to comprehensive register-based information on the years of education in 2007...
June 20, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28645331/circadian-clock-gene-polymorphisms-in-relation-to-sleep-patterns-and-obesity-in-african-americans-findings-from-the-jackson-heart-study
#7
Pia Riestra, Samson Y Gebreab, Ruihua Xu, Rumana J Khan, Amadou Gaye, Adolfo Correa, Nancy Min, Mario Sims, Sharon K Davis
BACKGROUND: Circadian rhythms regulate key biological processes and the dysregulation of the intrinsic clock mechanism affects sleep patterns and obesity onset. The CLOCK (circadian locomotor output cycles protein kaput) gene encodes a core transcription factor of the molecular circadian clock influencing diverse metabolic pathways, including glucose and lipid homeostasis. The primary objective of this study was to evaluate the associations between CLOCK single nucleotide polymorphisms (SNPs) and body mass index (BMI)...
June 23, 2017: BMC Genetics
https://www.readbyqxmd.com/read/28644851/comorbidities-in-the-diseasome-are-more-apparent-than-real-what-bayesian-filtering-reveals-about-the-comorbidities-of-depression
#8
Peter Marx, Peter Antal, Bence Bolgar, Gyorgy Bagdy, Bill Deakin, Gabriella Juhasz
Comorbidity patterns have become a major source of information to explore shared mechanisms of pathogenesis between disorders. In hypothesis-free exploration of comorbid conditions, disease-disease networks are usually identified by pairwise methods. However, interpretation of the results is hindered by several confounders. In particular a very large number of pairwise associations can arise indirectly through other comorbidity associations and they increase exponentially with the increasing breadth of the investigated diseases...
June 23, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28644415/genome-wide-association-study-of-dietary-pattern-scores
#9
Frédéric Guénard, Annie Bouchard-Mercier, Iwona Rudkowska, Simone Lemieux, Patrick Couture, Marie-Claude Vohl
Dietary patterns, representing global food supplies rather than specific nutrients or food intakes, have been associated with cardiovascular disease (CVD) incidence and mortality. The contribution of genetic factors in the determination of food intakes, preferences and dietary patterns has been previously established. The current study aimed to identify novel genetic factors associated with reported dietary pattern scores. Reported dietary patterns scores were derived from reported dietary intakes for the preceding month and were obtained through a food frequency questionnaire and genome-wide association study (GWAS) conducted in a study sample of 141 individuals...
June 23, 2017: Nutrients
https://www.readbyqxmd.com/read/28642195/how-lipid-droplets-tag-along-glycerolipid-synthetic-enzymes-and-lipid-storage
#10
REVIEW
Huan Wang, Michael V Airola, Karen Reue
Triacylglycerols (TAG) serve as the predominant form of energy storage in mammalian cells, and TAG synthesis influences conditions such as obesity, fatty liver, and insulin resistance. In most tissues, the glycerol 3-phosphate pathway enzymes are responsible for TAG synthesis, and the regulation and function of these enzymes is therefore important for metabolic homeostasis. Here we review the sites and regulation of glycerol-3-phosphate acyltransferase (GPAT), acylglycerol-3-phosphate acyltransferase (AGPAT), lipin/phosphatidic acid phosphatase (PAP), and diacylglycerol acyltransferase (DGAT) enzyme action...
June 19, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28642059/new-trends-on-obesity-and-nafld-in-asia
#11
REVIEW
Jian-Gao Fan, Seung-Up Kim, Vincent Wai-Sun Wong
Traditionally, obesity and its related diseases are considered problems in Western countries. However, in the past two decades, urbanization in many Asian countries has led to sedentary lifestyle and overnutrition, and has set the stage for the epidemic of obesity. This article reviews the epidemiological trend of obesity in Asia with special emphasis on the emerging condition of non-alcoholic fatty liver disease (NAFLD). Currently, the population prevalence of NAFLD in Asia is around 25%, similar to that in many Western countries...
June 19, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28640866/diet-induced-adipose-tissue-expansion-is-mitigated-in-mice-with-a-targeted-inactivation-of-mesoderm-specific-transcript-mest
#12
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/28639538/metabolic-syndrome-pathophysiology-management-and-modulation-by-natural-compounds
#13
Yogita Rochlani, Naga Venkata Pothineni, Swathi Kovelamudi, Jawahar L Mehta
Metabolic syndrome (MetS) represents a cluster of metabolic abnormalities that include hypertension, central obesity, insulin resistance, and atherogenic dyslipidemia, and is strongly associated with an increased risk for developing diabetes and atherosclerotic and nonatherosclerotic cardiovascular disease (CVD). The pathogenesis of MetS involves both genetic and acquired factors that contribute to the final pathway of inflammation that leads to CVD. MetS has gained significant importance recently due to the exponential increase in obesity worldwide...
June 1, 2017: Therapeutic Advances in Cardiovascular Disease
https://www.readbyqxmd.com/read/28638695/pre-rheumatoid-arthritis-and-its-prevention
#14
REVIEW
Binoy J Paul, Hemanth Illath Kandy, Vinod Krishnan
Pre-rheumatoid arthritis (pre-RA) is the preclinical period of the disease that precedes the onset of clinically apparent RA. It includes the interaction between genetic and environmental risk factors and development of disease-related autoantibodies and joint symptoms and signs, which may be considered nonspecific or unclassified for RA. A better understanding of the pre-RA stage will be useful in developing screening programs for early detection of RA. Identifying and modifying risk factors such as smoking, periodontitis, obesity, viral infections, and hormonal or dietary factors will be useful in preventing RA in susceptible population...
June 2017: European Journal of Rheumatology
https://www.readbyqxmd.com/read/28638490/obesity-and-microbiota-an-example-of-an-intricate-relationship
#15
REVIEW
Sabrina Duranti, Chiara Ferrario, Douwe van Sinderen, Marco Ventura, Francesca Turroni
It is widely accepted that metabolic disorders, such as obesity, are closely linked to lifestyle and diet. Recently, the central role played by the intestinal microbiota in human metabolism and in progression of metabolic disorders has become evident. In this context, animal studies and human trials have demonstrated that alterations of the intestinal microbiota towards enhanced energy harvest is a characteristic of the obese phenotype. Many publications, involving both animal studies and clinical trials, have reported on the successful exploitation of probiotics and prebiotics to treat obesity...
2017: Genes & Nutrition
https://www.readbyqxmd.com/read/28638220/green-tea-polyphenols-ameliorate-non-alcoholic-fatty-liver-disease-through-upregulating-ampk-activation-in-high-fat-fed-zucker-fatty-rats
#16
Yi Tan, Jane Kim, Jing Cheng, Madeleine Ong, Wei-Guo Lao, Xing-Liang Jin, Yi-Guang Lin, Linda Xiao, Xue-Qiong Zhu, Xian-Qin Qu
AIM: To investigate protective effects and molecular mechanisms of green tea polyphenols (GTP) on non-alcoholic fatty liver disease (NAFLD) in Zucker fatty (ZF) rats. METHODS: Male ZF rats were fed a high-fat diet (HFD) for 2 wk then treated with GTP (200 mg/kg) or saline (5 mL/kg) for 8 wk, with Zucker lean rat as their control. At the end of experiment, serum and liver tissue were collected for measurement of metabolic parameters, alanine aminotransferase (ALT) and aspartate aminotransferase (AST), inflammatory cytokines and hepatic triglyceride and liver histology...
June 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28637406/socioeconomic-status-the-missing-link-between-obesity-and-diabetes-mellitus
#17
Alexei Volaco, Ana Maria Cavalcanti, Roberto Pecoits Filho, Dalton Bertolim Précoma
BACKGROUND: Currently, there is an epidemic expansion of the obesity rates worldwide. The increasing number of obese individuals associated with the aging of population leads to increasing number of individuals with type 2 diabetes mellitus (T2DM) at the same rate. The traditional factors that link obesity to T2DM are related to genetics, hypercaloric diet, sedentary lifestyle, and stress. Individuals from lower socioeconomic status (SES) have restricted autonomy and opportunities that could lead to more stress and consequently increase in stress hormones, such as cortisol, catecholamines, glucagon, and growth hormone, which might ultimately change fat deposition, increasing visceral fat and increasing the risk of T2DM mellitus development...
June 21, 2017: Current Diabetes Reviews
https://www.readbyqxmd.com/read/28636934/the-tmao-producing-enzyme-flavin-containing-monooxygenase-3-regulates-obesity-and-the-beiging-of-white-adipose-tissue
#18
Rebecca C Schugar, Diana M Shih, Manya Warrier, Robert N Helsley, Amy Burrows, Daniel Ferguson, Amanda L Brown, Anthony D Gromovsky, Markus Heine, Arunachal Chatterjee, Lin Li, Xinmin S Li, Zeneng Wang, Belinda Willard, YongHong Meng, Hanjun Kim, Nam Che, Calvin Pan, Richard G Lee, Rosanne M Crooke, Mark J Graham, Richard E Morton, Carl D Langefeld, Swapan K Das, Lawrence L Rudel, Nizar Zein, Arthur J McCullough, Srinivasan Dasarathy, W H Wilson Tang, Bernadette O Erokwu, Chris A Flask, Markku Laakso, Mete Civelek, Sathyamangla V Naga Prasad, Joerg Heeren, Aldons J Lusis, Stanley L Hazen, J Mark Brown
Emerging evidence suggests that microbes resident in the human intestine represent a key environmental factor contributing to obesity-associated disorders. Here, we demonstrate that the gut microbiota-initiated trimethylamine N-oxide (TMAO)-generating pathway is linked to obesity and energy metabolism. In multiple clinical cohorts, systemic levels of TMAO were observed to strongly associate with type 2 diabetes. In addition, circulating TMAO levels were associated with obesity traits in the different inbred strains represented in the Hybrid Mouse Diversity Panel...
June 20, 2017: Cell Reports
https://www.readbyqxmd.com/read/28636007/analysis-of-association-of-gene-variants-with-obesity-traits-in-new-zealand-european-children-at-6-years-of-age
#19
Mohanraj Krishnan, John M D Thompson, Edwin A Mitchell, Rinki Murphy, Lesley M E McCowan, Andrew N Shelling, G On Behalf Of The Children Of Scope Study Group
Childhood obesity is a public health problem, which is associated with a long-term increased risk of cardiovascular disease and premature mortality. Several gene variants have previously been identified that have provided novel insights into biological factors that contribute to the development of obesity. As obesity tracks through childhood into adulthood, identification of the genetic factors for obesity in early life is important. The objective of this study was to identify putative associations between genetic variants and obesity traits in children at 6 years of age...
June 21, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28633683/plasminogen-activator-inhibitor-1-is-regulated-through-dietary-fat-intake-and-heritability-studies-in-twins
#20
Anna Janina Engstler, Turid Frahnow, Michael Kruse, Andreas Friedrich Hermann Pfeiffer, Ina Bergheim
In different pathophysiological conditions plasminogen activator inhibitor-1 (PAI-1) plasma concentrations are elevated. As dietary patterns are considered to influence PAI-1 concentration, we aimed to determine active PAI-1 plasma concentrations and mRNA expression in adipose tissue before and after consumption of a high-fat diet (HFD) and the impact of additive genetic effects herein in humans. For 6 weeks, 46 healthy, non-obese pairs of twins (aged 18-70) received a normal nutritionally balanced diet (ND) followed by an isocaloric HFD for 6 weeks...
June 21, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
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