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Obesity methylation

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https://www.readbyqxmd.com/read/28100914/tet-mediated-hydroxymethylcytosine-at-the-ppar%C3%AE-locus-is-required-for-initiation-of-adipogenic-differentiation
#1
Y Yoo, J H Park, C Weigel, D B Liesenfeld, D Weichenhan, C Plass, D-G Seo, A M Lindroth, Y J Park
BACKGROUND/OBJECTIVES: Adipose tissue is one of the main organs regulating energy homeostasis, via energy storage as well as endocrine function. The adipocyte cell number is largely determined by adipogenesis. While the molecular mechanism of adipogenesis has been extensively studied, its role in dynamic DNA methylation plasticity remains unclear. Recently, it has been shown that Tet methylcytosine dioxygenase (TET) are catalytically capable of oxidizing DNA 5-methylcytosine (5-mC) to 5-hydroxymethylcytosine (5-hmC) towards a complete removal of the methylated cytosine...
January 19, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
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
#2
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/28090638/late-gestational-intermittent-hypoxia-induces-metabolic-and-epigenetic-changes-in-male-adult-offspring-mice
#3
Abdelnaby Khalyfa, Rene Cortese, Zhuanhong Qiao, Honggang Ye, Riyue Bao, Jorge Andrade, David Gozal
Pregnancy, particularly late gestation, has been associated with a relatively high prevalence of obstructive sleep apnea (OSA). Intermittent hypoxia (IH), a hallmark of OSA, could impose significant long-term effects on somatic growth, energy homeostasis, and metabolic function in offspring. We hypothesized that IH during late pregnancy (LG-IH) may increase the propensity for metabolic dysregulation and obesity in adult offspring via epigenetic modifications. Time-pregnant female C57BL/6 mice were exposed to LG-IH or room air (LG-RA) during days 13-18 of gestation...
January 15, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28068899/maternal-bmi-as-a-predictor-of-methylation-of-obesity-related-genes-in-saliva-samples-from-preschool-age-hispanic-children-at-risk-for-obesity
#4
Kathryn Tully Oelsner, Yan Guo, Sophie Bao-Chieu To, Amy L Non, Shari L Barkin
BACKGROUND: The study of epigenetic processes and mechanisms present a dynamic approach to assess complex individual variation in obesity susceptibility. However, few studies have examined epigenetic patterns in preschool-age children at-risk for obesity despite the relevance of this developmental stage to trajectories of weight gain. We hypothesized that salivary DNA methylation patterns of key obesogenic genes in Hispanic children would 1) correlate with maternal BMI and 2) allow for identification of pathways associated with children at-risk for obesity...
January 9, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28059159/obesity-methylation-a-consequence-not-a-cause
#5
Tim Geach
No abstract text is available yet for this article.
January 6, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28045116/comparative-analysis-of-dna-methylome-and-transcriptome-of-skeletal-muscle-in-lean-obese-and-mini-type-pigs
#6
Yalan Yang, Guoming Liang, Guanglin Niu, Yuanyuan Zhang, Rong Zhou, Yanfang Wang, Yulian Mu, Zhonglin Tang, Kui Li
DNA methylation plays a pivotal role in biological processes by affecting gene expression. However, how DNA methylation mediates phenotype difference of skeletal muscle between lean-, obese-, and mini-type pigs remains unclear. We systematically carried out comparative analysis of skeletal muscle by integrating analysis of genome-wide DNA methylation, mRNA, lncRNA and miRNA profiles in three different pig breeds (obese-type Tongcheng, lean-type Landrace, and mini-type Wuzhishan pigs). We found that the differentially methylated genes (DMGs) were significantly associated with lipid metabolism, oxidative stress and muscle development...
January 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28031460/inhibitory-role-of-%C3%AE-2-6-sialylation-in-adipogenesis
#7
Tomoko Kaburagi, Yasuhiko Kizuka, Shinobu Kitazume, Naoyuki Taniguchi
Adipose tissue plays critical roles in obesity and related diseases such as diabetes and cardiovascular diseases. Previous reports suggest that glycans, the most common post-translational modifications, are involved in obesity-related diseases, but what type of glycan regulates adipogenesis during obesity remains unclear. In this study, we first quantified the mRNA levels of 167 genes (encoding 144 glycosyltransferases and 23 related enzymes) in visceral adipose tissues (VATs) from control mice and high fat diet (HFD)-induced obese mice...
December 28, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28030645/disruption-of-lipid-raft-function-increases-expression-and-secretion-of-monocyte-chemoattractant-protein-1-in-3t3-l1-adipocytes
#8
Juu-Chin Lu, Yu-Ting Chiang, Yu-Chun Lin, Yu-Tzu Chang, Chia-Yun Lu, Tzu-Yu Chen, Chia-Shan Yeh
The adipocyte is unique in its capacity to store lipids. In addition to triglycerides, the adipocyte stores a significant amount of cholesterol. Moreover, obese adipocytes are characterized by a redistribution of cholesterol with depleted cholesterol in the plasma membrane, suggesting that cholesterol perturbation may play a role in adipocyte dysfunction. We used methyl-β-cyclodextrin (MβCD), a molecule with high affinity for cholesterol, to rapidly deplete cholesterol level in differentiated 3T3-L1 adipocytes...
2016: PloS One
https://www.readbyqxmd.com/read/28025996/rosuvastatin-as-a-potential-preventive-drug-for-the-development-of-hepatocellular-carcinoma-associated-with-non-alcoholic-fatty-liver-disease-in-mice
#9
Keisuke Yokohama, Shinya Fukunishi, Masaaki Ii, Ken Nakamura, Hideko Ohama, Yusuke Tsuchimoto, Akira Asai, Yasuhiro Tsuda, Kazuhide Higuchi
Hepatocellular carcinoma (HCC) represents approximately 85% of all primary liver cancer cases. Non-alcoholic fatty liver disease (NAFLD) is one of the risk factors for HCC. NAFLD occurs in patients with components of metabolic syndrome, such as type 2 diabetes mellitus, obesity, hypertension and hyperlipidemia. Therefore, hyperlipidemia also represents a patient population at risk for HCC that can readily be identified. Rosuvastatin, a 3-hydroxy-3-methyl-glutaryl coenzyme A (HMG-CoA) reductase inhibitor, has exhibited a more potent affinity for the active site of HMG-CoA reductase than other statins...
November 2016: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28004076/-research-progress-of-kr%C3%A3-ppel-like-factor-7
#10
Yue-Chan Chen, Hong Wei, Zhi-Wei Zhang
Krüppel-like factor 7 (KLF7), a member of Krüppel-like transcription factors (KLFs), also known as ubiquitous Krüppel- like factor (UKLF), is ubiquitously expressed in various tissues of adult human beings. Genetics reports showed that the genetic polymorphism of KLF7 is associated with obesity, type 2 diabetes, mental development in human beings; and KLF7 methylation is associated with the development of diffuse gastric cancer (gastric adenocarcinoma). In addition, some genomics reports suggested that KLF7 is one of the key transcription factors in the regulatory networks of serum markers change during the cardiovascular disease...
December 25, 2016: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28002404/epigenome-wide-association-study-of-body-mass-index-and-the-adverse-outcomes-of-adiposity
#11
Simone Wahl, Alexander Drong, Benjamin Lehne, Marie Loh, William R Scott, Sonja Kunze, Pei-Chien Tsai, Janina S Ried, Weihua Zhang, Youwen Yang, Sili Tan, Giovanni Fiorito, Lude Franke, Simonetta Guarrera, Silva Kasela, Jennifer Kriebel, Rebecca C Richmond, Marco Adamo, Uzma Afzal, Mika Ala-Korpela, Benedetta Albetti, Ole Ammerpohl, Jane F Apperley, Marian Beekman, Pier Alberto Bertazzi, S Lucas Black, Christine Blancher, Marc-Jan Bonder, Mario Brosch, Maren Carstensen-Kirberg, Anton J M de Craen, Simon de Lusignan, Abbas Dehghan, Mohamed Elkalaawy, Krista Fischer, Oscar H Franco, Tom R Gaunt, Jochen Hampe, Majid Hashemi, Aaron Isaacs, Andrew Jenkinson, Sujeet Jha, Norihiro Kato, Vittorio Krogh, Michael Laffan, Christa Meisinger, Thomas Meitinger, Zuan Yu Mok, Valeria Motta, Hong Kiat Ng, Zacharoula Nikolakopoulou, Georgios Nteliopoulos, Salvatore Panico, Natalia Pervjakova, Holger Prokisch, Wolfgang Rathmann, Michael Roden, Federica Rota, Michelle Ann Rozario, Johanna K Sandling, Clemens Schafmayer, Katharina Schramm, Reiner Siebert, P Eline Slagboom, Pasi Soininen, Lisette Stolk, Konstantin Strauch, E-Shyong Tai, Letizia Tarantini, Barbara Thorand, Ettje F Tigchelaar, Rosario Tumino, Andre G Uitterlinden, Cornelia van Duijn, Joyce B J van Meurs, Paolo Vineis, Ananda Rajitha Wickremasinghe, Cisca Wijmenga, Tsun-Po Yang, Wei Yuan, Alexandra Zhernakova, Rachel L Batterham, George Davey Smith, Panos Deloukas, Bastiaan T Heijmans, Christian Herder, Albert Hofman, Cecilia M Lindgren, Lili Milani, Pim van der Harst, Annette Peters, Thomas Illig, Caroline L Relton, Melanie Waldenberger, Marjo-Riitta Järvelin, Valentina Bollati, Richie Soong, Tim D Spector, James Scott, Mark I McCarthy, Paul Elliott, Jordana T Bell, Giuseppe Matullo, Christian Gieger, Jaspal S Kooner, Harald Grallert, John C Chambers
Approximately 1.5 billion people worldwide are overweight or affected by obesity, and are at risk of developing type 2 diabetes, cardiovascular disease and related metabolic and inflammatory disturbances. Although the mechanisms linking adiposity to associated clinical conditions are poorly understood, recent studies suggest that adiposity may influence DNA methylation, a key regulator of gene expression and molecular phenotype. Here we use epigenome-wide association to show that body mass index (BMI; a key measure of adiposity) is associated with widespread changes in DNA methylation (187 genetic loci with P < 1 × 10(-7), range P = 9...
December 21, 2016: Nature
https://www.readbyqxmd.com/read/28002401/reversible-methylation-of-m-6-am-in-the-5-cap-controls-mrna-stability
#12
Jan Mauer, Xiaobing Luo, Alexandre Blanjoie, Xinfu Jiao, Anya V Grozhik, Deepak P Patil, Bastian Linder, Brian F Pickering, Jean-Jacques Vasseur, Qiuying Chen, Steven S Gross, Olivier Elemento, Françoise Debart, Megerditch Kiledjian, Samie R Jaffrey
Internal bases in mRNA can be subjected to modifications that influence the fate of mRNA in cells. One of the most prevalent modified bases is found at the 5' end of mRNA, at the first encoded nucleotide adjacent to the 7-methylguanosine cap. Here we show that this nucleotide, N(6),2'-O-dimethyladenosine (m(6)Am), is a reversible modification that influences cellular mRNA fate. Using a transcriptome-wide map of m(6)Am we find that m(6)Am-initiated transcripts are markedly more stable than mRNAs that begin with other nucleotides...
January 19, 2017: Nature
https://www.readbyqxmd.com/read/27999105/hepatic-dpp4-dna-methylation-associates-with-fatty-liver
#13
Christian Baumeier, Sophie Saussenthaler, Anne Kammel, Markus Jähnert, Luisa Schlüter, Deike Hesse, Mickaël Canouil, Stephane Lobbens, Robert Caiazzo, Violeta Raverdy, François Pattou, Emma Nilsson, Jussi Pihlajamäki, Charlotte Ling, Philippe Froguel, Annette Schürmann, Robert W Schwenk
Hepatic DPP4 expression is elevated in subjects with ectopic fat accumulation in the liver. However, whether increased dipeptidyl peptidase 4 (DPP4) is involved in the pathogenesis or is rather a consequence of metabolic disease is not known. We therefore studied the transcriptional regulation of hepatic Dpp4 in young mice prone to diet-induced obesity. Already at 6 weeks of age, expression of hepatic Dpp4 was increased in mice with high weight gain, independent of liver fat content. In the same animals, methylation of four intronic CpG sites was decreased, amplifying glucose-induced transcription of hepatic Dpp4 In older mice, hepatic triglyceride content was increased only in animals with elevated Dpp4 expression...
January 2017: Diabetes
https://www.readbyqxmd.com/read/27988168/dna-methylation-and-histone-deacetylation-regulating-insulin-sensitivity-due-to-chronic-cold-exposure
#14
Xiaoqing Wang, Lai Wang, Yizheng Sun, Ruiping Li, Jinbo Deng, Jiexin Deng
In this study, we investigated the causal relationship between chronic cold exposure and insulin resistance and the mechanisms of how DNA methylation and histone deacetylation regulate cold-reduced insulin resistance. 46 adult male mice from postnatal day 90-180 were randomly assigned to control group and cold-exposure group. Mice in cold-exposure group were placed at temperature from -1 to 4 °C for 30 days to mimic chronic cold environment. Then, fasting blood glucose, blood insulin level and insulin resistance index were measured with enzymatic methods...
December 14, 2016: Cryobiology
https://www.readbyqxmd.com/read/27986580/no-effect-of-different-bariatric-surgery-procedures-on-line-1-dna-methylation-in-diabetic-and-nondiabetic-morbidly-obese-patients
#15
G M Martín-Núñez, A Cabrera-Mulero, J Alcaide-Torres, E García-Fuentes, F J Tinahones, S Morcillo
BACKGROUND: Bariatric surgery (BS) is proposed as a highly effective therapy for reducing weight and improving obesity-related co-morbidities. The molecular mechanisms involved in the metabolic improvement after BS are not completely resolved. Epigenetic modifications could have an important role. OBJECTIVE: The aim of this study was to evaluate the effect of different BS procedures (Roux-en-Y gastric bypass and laparoscopic sleeve gastrectomy) on global DNA methylation (long interspersed nucleotide element 1 [LINE-1]) in a group of nondiabetic and diabetic severely obese patients...
October 21, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/27982202/a-boy-with-prader-willi-syndrome-unmasking-precocious-puberty-during-growth-hormone-replacement-therapy
#16
Natasha G Ludwig, Rafael F Radaeli, Mariana M X Silva, Camila M Romero, Alexandre J F Carrilho, Danielle Bessa, Delanie B Macedo, Maria L Oliveira, Ana Claudia Latronico, Tânia L Mazzuco
Prader-Willi syndrome (PWS) is a genetic disorder frequently characterized by obesity, growth hormone deficiency, genital abnormalities, and hypogonadotropic hypogonadism. Incomplete or delayed pubertal development as well as premature adrenarche are usually found in PWS, whereas central precocious puberty (CPP) is very rare. This study aimed to report the clinical and biochemical follow-up of a PWS boy with CPP and to discuss the management of pubertal growth. By the age of 6, he had obesity, short stature, and many clinical criteria of PWS diagnosis, which was confirmed by DNA methylation test...
November 2016: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27968834/methylation-loci-associated-with-body-mass-index-waist-circumference-and-waist-to-hip-ratio-in-chinese-adults-an-epigenome-wide-analysis
#17
Biqi Wang, Wenjing Gao, Jun Li, Canqing Yu, Weihua Cao, Jun Lv, Zengchang Pang, Liming Cong, Hua Wang, Xianping Wu, Liming Liang, Tangchun Wu, Liming Li
BACKGROUND: DNA methylation has been implicated in the pathology of obesity, but little is known about such epigenetic variants in Chinese people. We conducted an epigenome-wide analysis of methylation at CpG sites in relation to body mass index (BMI), waist circumference (WC) and waist-to-hip ratio (WHR) among Chinese adult populations. METHODS: 469 twins from the Chinese National Twin Registry were the discovery cohort. After quality control, methylation levels in whole blood leukocyte DNA were tested for association with BMI, WC, and WHR using mixed linear regressions, adjusting for demographics, lifestyle, and family structure...
October 2016: Lancet
https://www.readbyqxmd.com/read/27933755/maternal-pre-pregnancy-bmi-downregulates-neonatal-cord-blood-lep-methylation
#18
R Kadakia, Y Zheng, Z Zhang, W Zhang, L Hou, J L Josefson
BACKGROUND: Neonatal adiposity has many determinants and may be a risk factor for future obesity. Epigenetic regulation of metabolically important genes is a potential contributor. OBJECTIVES: The objective of the study is to determine whether methylation changes in the LEP gene in cord blood DNA are impacted by the maternal environment or affect neonatal adiposity measures. METHODS: A cross-sectional study of 114 full-term neonates born to healthy mothers with normal glucose tolerance was performed...
December 8, 2016: Pediatric Obesity
https://www.readbyqxmd.com/read/27931182/exposure-of-bovine-oocytes-and-embryos-to-elevated-non-esterified-fatty-acid-concentrations-integration-of-epigenetic-and-transcriptomic-signatures-in-resultant-blastocysts
#19
K L J Desmet, V Van Hoeck, D Gagné, E Fournier, A Thakur, A M O'Doherty, C P Walsh, M A Sirard, P E J Bols, J L M R Leroy
BACKGROUND: Metabolic stress associated with negative energy balance in high producing dairy cattle and obesity in women is a risk factor for decreased fertility. Non-esterified fatty acids (NEFA) are involved in this pathogenesis as they jeopardize oocyte and embryo development. Growing evidence indicates that maternal metabolic disorders can disturb epigenetic programming, such as DNA methylation, in the offspring. Oocyte maturation and early embryo development coincide with methylation changes and both are sensitive to adverse environments...
December 8, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27927805/transmission-of-metabolic-dysfunction-across-generations
#20
REVIEW
Kathleen Jaeger, Jessica L Saben, Kelle H Moley
Recent human and animal studies investigating the roles of the genome, epigenome, and environmental cues have identified associations between offspring predisposition to life-long obesity/metabolic disease and epigenetic modifications such as DNA methylation. This review explores the mechanisms by which maternal exposures impair the health of not only the next generation but also potentially future generations of offspring.
January 2017: Physiology
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