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https://www.readbyqxmd.com/read/29040503/the-role-of-early-life-growth-development-the-fto-gene-and-exclusive-breastfeeding-on-child-bmi-trajectories
#1
Yan Yan Wu, Stephen Lye, Laurent Briollais
Background: Recent studies have implicated the FTO gene in child and adult obesity. A longer duration of exclusive breastfeeding (EXBF) has been shown to reduce body mass index (BMI) and the risk of being overweight in the general population and among FTO gene carriers. However, it remains unclear whether the preventive effect of EXBF could be explained by its impact on early life growth development, e.g. ages at adiposity peak (AP) and adiposity rebound (AR) and BMI velocities in the first years of life, which are major determinants of overweight and obesity later in life...
June 20, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/29035364/sympathetic-neuron-associated-macrophages-contribute-to-obesity-by-importing-and-metabolizing-norepinephrine
#2
Roksana M Pirzgalska, Elsa Seixas, Jason S Seidman, Verena M Link, Noelia Martínez Sánchez, Inês Mahú, Raquel Mendes, Vitka Gres, Nadiya Kubasova, Imogen Morris, Bernardo A Arús, Chelsea M Larabee, Miguel Vasques, Francisco Tortosa, Ana L Sousa, Sathyavathy Anandan, Erin Tranfield, Maureen K Hahn, Matteo Iannacone, Nathanael J Spann, Christopher K Glass, Ana I Domingos
The cellular mechanism(s) linking macrophages to norepinephrine (NE)-mediated regulation of thermogenesis have been a topic of debate. Here we identify sympathetic neuron-associated macrophages (SAMs) as a population of cells that mediate clearance of NE via expression of solute carrier family 6 member 2 (SLC6A2), an NE transporter, and monoamine oxidase A (MAOA), a degradation enzyme. Optogenetic activation of the sympathetic nervous system (SNS) upregulates NE uptake by SAMs and shifts the SAM profile to a more proinflammatory state...
October 9, 2017: Nature Medicine
https://www.readbyqxmd.com/read/29034636/-high-dose-heat-shock-protein-gp96-immunization-prevents-type-1-diabetes-via-inducing-regulatory-t-cells
#3
Mi Chen, Xinghui Li, Huaguo Zheng, Songdong Meng
Type 1 diabetes (T1D), the most prevalent human autoimmune disease, occurs in genetically susceptible individuals. Regulatory T cells (Tregs) are defective in T1D setting. Therefore, efforts to repair or restore Tregs in T1D may prevent or reverse this autoimmune disease. Here, we studied the potential role of rgp96 in preventing T1D, using non-obese diabetic (NOD) mice as an animal model. High-dose rgp96 immunization elicited efficient protection of mice against T1D, as evidenced by stable blood glucose, decreased disease incidence...
December 25, 2016: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/29032145/genetic-association-analysis-of-vitamin-d-receptor-gene-polymorphisms-and-obesity-related-phenotypes
#4
Correa-Rodríguez María, Carrillo-Ávila Jose Antonio, Schmidt-RioValle Jacqueline, González-Jiménez Emilio, Vargas Sofia, Martin Javier, Rueda-Medina Blanca
Vitamin D has been established as a key factor in the development of obesity through the vitamin D receptor (VDR). The aim of this study was to investigate the contribution of the VDR gene to obesity-related phenotypes in a population of Caucasian young adults. The study population consisted of 701 healthy Spanish young adults (mean age 20.41±2.48). Three single-nucleotide polymorphisms (SNPs) of VDR (TaqI, BsmI and FokI) were selected as genetic markers. Body composition measurements including weight, body mass index (BMI), fat mass (FM), percentage of fat mass (PFM), fat-free mass (FFM) and visceral fat level (VFL) were analysed...
October 12, 2017: Gene
https://www.readbyqxmd.com/read/29032027/peripheral-neuropathy-and-hindlimb-paralysis-in-a-mouse-model-of-adipocyte-specific-knockout-of-lkb1
#5
Yan Xiong, Jessica C Page, Naagarajan Narayanan, Chao Wang, Zhihao Jia, Feng Yue, Xine Shi, Wen Jin, Keping Hu, Meng Deng, Riyi Shi, Tizhong Shan, Gongshe Yang, Shihuan Kuang
Brown adipose tissues (BAT) burn lipids to generate heat through uncoupled respiration, thus representing a powerful target to counteract lipid accumulation and obesity. The tumor suppressor liver kinase b1 (Lkb1) is a key regulator of cellular energy metabolism; and adipocyte-specific knockout of Lkb1 (Ad-Lkb1 KO) leads to the expansion of BAT, improvements in systemic metabolism and resistance to obesity in young mice. Here we report the unexpected finding that the Ad-Lkb1 KO mice develop hindlimb paralysis at mid-age...
September 21, 2017: EBioMedicine
https://www.readbyqxmd.com/read/29031720/brown-adipocytes-can-display-a-mammary-basal-myoepithelial-cell-phenotype-in%C3%A2-vivo
#6
Li Li, Baoguo Li, Min Li, Chaoqun Niu, Guanlin Wang, Ting Li, Elżbieta Król, Wanzhu Jin, John R Speakman
OBJECTIVE: Previous work has suggested that white adipocytes may also show a mammary luminal secretory cell phenotype during lactation. The capacity of brown and beige/brite adipocytes to display a mammary cell phenotype and the levels at which they demonstrate such phenotypes in vivo is currently unknown. METHODS: To investigate the putative adipocyte origin of mammary gland cells, we performed genetic lineage-labeling experiments in BAT and the mammary glands...
October 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29031711/lorcaserin-improves-glycemic-control-via-a-melanocortin-neurocircuit
#7
Luke K Burke, Emmanuel Ogunnowo-Bada, Teodora Georgescu, Claudia Cristiano, Pablo B Martinez de Morentin, Lourdes Valencia Torres, Giuseppe D'Agostino, Christine Riches, Nicholas Heeley, Yue Ruan, Marcelo Rubinstein, Malcolm J Low, Martin G Myers, Justin J Rochford, Mark L Evans, Lora K Heisler
OBJECTIVE: The increasing prevalence of type 2 diabetes (T2D) and associated morbidity and mortality emphasizes the need for a more complete understanding of the mechanisms mediating glucose homeostasis to accelerate the identification of new medications. Recent reports indicate that the obesity medication lorcaserin, a 5-hydroxytryptamine (5-HT, serotonin) 2C receptor (5-HT2CR) agonist, improves glycemic control in association with weight loss in obese patients with T2D. Here we evaluate whether lorcaserin has an effect on glycemia without body weight loss and how this effect is achieved...
October 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29031550/mechanisms-for-agrp-neuron-mediated-regulation-of-appetitive-behaviors-in-rodents
#8
REVIEW
M Alex Thomas, Bingzhong Xue
The obesity epidemic is a major health and economic burden facing both developed and developing countries worldwide. Interrogation of the central and peripheral mechanisms regulating ingestive behaviors have primarily focused on food intake, and in the process uncovered a detailed neuroanatomical framework controlling this behavior. However, these studies have largely ignored the behaviors that bring animals, including humans, in contact with food. It is therefore useful to dichotomize ingestive behaviors as appetitive (motivation to find and store food) and consummatory (consumption of food once found), and utilize an animal model that naturally displays these behaviors...
October 12, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29030599/genome-wide-meta-analysis-associates-hla-dqa1-drb1-and-lpa-and-lifestyle-factors-with-human-longevity
#9
Peter K Joshi, Nicola Pirastu, Katherine A Kentistou, Krista Fischer, Edith Hofer, Katharina E Schraut, David W Clark, Teresa Nutile, Catriona L K Barnes, Paul R H J Timmers, Xia Shen, Ilaria Gandin, Aaron F McDaid, Thomas Folkmann Hansen, Scott D Gordon, Franco Giulianini, Thibaud S Boutin, Abdel Abdellaoui, Wei Zhao, Carolina Medina-Gomez, Traci M Bartz, Stella Trompet, Leslie A Lange, Laura Raffield, Ashley van der Spek, Tessel E Galesloot, Petroula Proitsi, Lisa R Yanek, Lawrence F Bielak, Antony Payton, Federico Murgia, Maria Pina Concas, Ginevra Biino, Salman M Tajuddin, Ilkka Seppälä, Najaf Amin, Eric Boerwinkle, Anders D Børglum, Archie Campbell, Ellen W Demerath, Ilja Demuth, Jessica D Faul, Ian Ford, Alessandro Gialluisi, Martin Gögele, MariaElisa Graff, Aroon Hingorani, Jouke-Jan Hottenga, David M Hougaard, Mikko A Hurme, M Arfan Ikram, Marja Jylhä, Diana Kuh, Lannie Ligthart, Christina M Lill, Ulman Lindenberger, Thomas Lumley, Reedik Mägi, Pedro Marques-Vidal, Sarah E Medland, Lili Milani, Reka Nagy, William E R Ollier, Patricia A Peyser, Peter P Pramstaller, Paul M Ridker, Fernando Rivadeneira, Daniela Ruggiero, Yasaman Saba, Reinhold Schmidt, Helena Schmidt, P Eline Slagboom, Blair H Smith, Jennifer A Smith, Nona Sotoodehnia, Elisabeth Steinhagen-Thiessen, Frank J A van Rooij, André L Verbeek, Sita H Vermeulen, Peter Vollenweider, Yunpeng Wang, Thomas Werge, John B Whitfield, Alan B Zonderman, Terho Lehtimäki, Michele K Evans, Mario Pirastu, Christian Fuchsberger, Lars Bertram, Neil Pendleton, Sharon L R Kardia, Marina Ciullo, Diane M Becker, Andrew Wong, Bruce M Psaty, Cornelia M van Duijn, James G Wilson, J Wouter Jukema, Lambertus Kiemeney, André G Uitterlinden, Nora Franceschini, Kari E North, David R Weir, Andres Metspalu, Dorret I Boomsma, Caroline Hayward, Daniel Chasman, Nicholas G Martin, Naveed Sattar, Harry Campbell, Tōnu Esko, Zoltán Kutalik, James F Wilson
Genomic analysis of longevity offers the potential to illuminate the biology of human aging. Here, using genome-wide association meta-analysis of 606,059 parents' survival, we discover two regions associated with longevity (HLA-DQA1/DRB1 and LPA). We also validate previous suggestions that APOE, CHRNA3/5, CDKN2A/B, SH2B3 and FOXO3A influence longevity. Next we show that giving up smoking, educational attainment, openness to new experience and high-density lipoprotein (HDL) cholesterol levels are most positively genetically correlated with lifespan while susceptibility to coronary artery disease (CAD), cigarettes smoked per day, lung cancer, insulin resistance and body fat are most negatively correlated...
October 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/29030493/intrinsic-aerobic-capacity-governs-the-associations-between-gut-microbiota-composition-and-fat-metabolism-age-dependently-in-rat-siblings
#10
Satu Pekkala, Sanna Lensu, Miriam Nokia, Sanja Vanhatalo, Lauren G Koch, Steven L Britton, Heikki Kainulainen
Host genetic factors affecting the gut microbiome play an important role in obesity. Yet limited attention has been paid on the host genetic factors linked to physical fitness in modifying the microbiome. This study determined whether sibling-matched pairs of rats selectively bred for high (HCR) and low (LCR) aerobic capacity differ in their microbiome age-dependently and which taxa associate with differential in metabolism. Several taxa in young adult rats (hereafter young) linked to inherited aerobic capacity while in older adult (hereafter old) rats most of the differences between the lines associated with body weight...
October 13, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/29027816/a-comparison-of-the-genetic-and-clinical-risk-factors-for-arterial-hypertension-between-indigenous-and-non-indigenous-people-of-the-shoria-mountain-region
#11
Tatyana Mulerova, Michael Ogarkov, Evgenya Uchasova, Michael Voevoda, Olga Barbarash
BACKGROUND: This study investigated the non-genetic and genetic risk factors for arterial hypertension (AH) in two ethnic groups living in the Mountain Shoria region: Shors and non-indigenous people. METHODS: Clinical and epidemiological study of compactly living population in the remote areas of the Mountain Shoria (Orton, Ust-Kabyrza, Sheregesh settlements, Kemerovo region). 1178 residents of these settlements were surveyed with the help of continuous sampling method; the sample consisted of adults (18 years and older)...
October 13, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/29026529/coordinating-erk-signaling-via-the-molecular-scaffold-kinase-suppressor-of-ras
#12
REVIEW
Danielle Frodyma, Beth Neilsen, Diane Costanzo-Garvey, Kurt Fisher, Robert Lewis
Many cancers, including those of the colon, lung, and pancreas, depend upon the signaling pathways induced by mutated and constitutively active Ras. The molecular scaffolds Kinase Suppressor of Ras 1 and 2 (KSR1 and KSR2) play potent roles in promoting Ras-mediated signaling through the Raf/MEK/ERK kinase cascade. Here we summarize the canonical role of KSR in cells, including its central role as a scaffold protein for the Raf/MEK/ERK kinase cascade, its regulation of various cellular pathways mediated through different binding partners, and the phenotypic consequences of KSR1 or KSR2 genetic inactivation...
2017: F1000Research
https://www.readbyqxmd.com/read/29024550/biology-of-obesity-and-weight-regain-implications-for-clinical-practice
#13
Mary Madeline Rogge, Bibha Gautam
BACKGROUND AND PURPOSE: Weight loss is recommended as first-line therapy for many chronic illnesses, including obesity. Most patients who do successfully lose weight are unable to maintain their reduced weight. Recent research findings are reviewed and synthesized to explain the biology of obesity, adaptation to weight loss, and weight regain. FINDINGS: Weight regain is a common consequence of successful weight loss. Current obesity management strategies fail to take into consideration the underlying genetic and environmental causes of obesity...
October 2017: Journal of the American Association of Nurse Practitioners
https://www.readbyqxmd.com/read/29024387/ethnic-and-population-differences-in-the-genetic-predisposition-to-human-obesity
#14
REVIEW
C Stryjecki, A Alyass, D Meyre
Obesity rates have escalated to the point of a global pandemic with varying prevalence across ethnic groups. These differences are partially explained by lifestyle factors in addition to genetic predisposition to obesity. This review provides a comprehensive examination of the ethnic differences in the genetic architecture of obesity. Using examples from evolution, heritability, admixture, monogenic and polygenic studies of obesity, we provide explanations for ethnic differences in the prevalence of obesity...
October 10, 2017: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29023587/genetic-variants-and-traits-related-to-insulin-like-growth-factor-i-and-insulin-resistance-and-their-interaction-with-lifestyles-on-postmenopausal-colorectal-cancer-risk
#15
Su Yon Jung, Thomas Rohan, Howard Strickler, Jennifer Bea, Zuo-Feng Zhang, Gloria Ho, Carolyn Crandall
Genetic variants and traits in metabolic signaling pathways may interact with lifestyle factors such as obesity, physical activity, and exogenous estrogen (E), influencing postmenopausal colorectal cancer (CRC) risk, but these interrelated pathways are not fully understood. In this case-cohort study, we examined 33 single-nucleotide polymorphisms (SNPs) in genes related to insulin-like growth factor-I (IGF-I)/ insulin resistance (IR) traits and signaling pathways, using data from 704 postmenopausal women in Women's Health Initiative Observation ancillary studies...
2017: PloS One
https://www.readbyqxmd.com/read/29020168/association-of-dna-methylation-based-biological-age-with-health-risk-factors-and-overall-and-cause-specific-mortality
#16
Pierre-Antoine Dugué, Julie K Bassett, JiHoon E Joo, Laura Baglietto, Chol-Hee Jung, Ee Ming Wong, Giovanni Fiorito, Daniel Schmidt, Enes Makalic, Shuai Li, Margarita Moreno-Betancur, Daniel D Buchanan, Paolo Vineis, Dallas R English, John L Hopper, Gianluca Severi, Melissa C Southey, Graham G Giles, Roger L Milne
Measures of biological age based on blood DNA methylation, referred to as age acceleration (AA), have been developed. We examined whether AA was associated with health risk factors and overall and cause-specific mortality. At baseline (1990-1994), blood samples were drawn from 2818 participants in the Melbourne Collaborative Cohort Study. DNA methylation was determined using the Illumina HM450K array. Mixed-effects models were used to examine the association of AA with health risk factors. Cox models were used to assess the association of AA with mortality...
August 17, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29019419/prenatal-exposure-to-endocrine-disruptors-and-reprogramming-of-adipogenesis-an-early-life-risk-factor-for-childhood-obesity
#17
Ayman El-Sayed Shafei, Enas Samir Nabih, Kirolos Atalla Shehata, Emad Sherif Mohamed Abd Elfatah, Abou Bakr Ahmed Sanad, Mohamed Yehia Marey, Abd Alla Mohamed Ahmed Hammouda, Mounir Mostafa Moussa Mohammed, Randa Mostafa, Mahmoud A Ali
Obesity is a global health problem. It is characterized by excess adipose tissue that results from either increase in the number of adipocytes or increase in adipocytes size. Adipocyte differentiation is a highly regulated process that involves the activation of several transcription factors culminating in the removal of adipocytes from the cell cycle and induction of highly specific proteins. Several other factors, including hormones, genes, and epigenetics, are among the most important triggers of the differentiation process...
October 11, 2017: Childhood Obesity
https://www.readbyqxmd.com/read/29018280/dusp5-functions-as-a-feedback-regulator-of-tnf%C3%AE-induced-erk1-2-dephosphorylation-and-inflammatory-gene-expression-in-adipocytes
#18
Justine S Habibian, Mitra Jefic, Rushita A Bagchi, Robert H Lane, Robert A McKnight, Timothy A McKinsey, Ron F Morrison, Bradley S Ferguson
Adipose tissue inflammation is a central pathological element that regulates obesity-mediated insulin resistance and type II diabetes. Evidence demonstrates that extracellular signal-regulated kinase (ERK 1/2) activation (i.e. phosphorylation) links tumor necrosis factor α (TNFα) to pro-inflammatory gene expression in the nucleus. Dual specificity phosphatases (DUSPs) inactivate ERK 1/2 through dephosphorylation and can thus inhibit inflammatory gene expression. We report that DUSP5, an ERK1/2 phosphatase, was induced in epididymal white adipose tissue (WAT) in response to diet-induced obesity...
October 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29016858/maternal-bmi-at-the-start-of-pregnancy-and-offspring-epigenome-wide-dna-methylation-findings-from-the-pregnancy-and-childhood-epigenetics-pace-consortium
#19
Gemma C Sharp, Lucas A Salas, Claire Monnereau, Catherine Allard, Paul Yousefi, Todd M Everson, Jon Bohlin, Zongli Xu, Rae-Chi Huang, Sarah E Reese, Cheng-Jian Xu, Nour Baïz, Cathrine Hoyo, Golareh Agha, Ritu Roy, John W Holloway, Akram Ghantous, Simon K Merid, Kelly M Bakulski, Leanne K Küpers, Hongmei Zhang, Rebecca C Richmond, Christian M Page, Liesbeth Duijts, Rolv T Lie, Phillip E Melton, Judith M Vonk, Ellen A Nohr, ClarLynda Williams-DeVane, Karen Huen, Sheryl L Rifas-Shiman, Carlos Ruiz-Arenas, Semira Gonseth, Faisal I Rezwan, Zdenko Herceg, Sandra Ekström, Lisa Croen, Fahimeh Falahi, Patrice Perron, Margaret R Karagas, Bilal M Quraishi, Matthew Suderman, Maria C Magnus, Vincent W V Jaddoe, Jack A Taylor, Denise Anderson, Shanshan Zhao, Henriette A Smit, Michele J Josey, Asa Bradman, Andrea A Baccarelli, Mariona Bustamante, Siri E Håberg, Göran Pershagen, Irva Hertz-Picciotto, Craig Newschaffer, Eva Corpeleijn, Luigi Bouchard, Debbie A Lawlor, Rachel L Maguire, Lisa F Barcellos, George Davey Smith, Brenda Eskenazi, Wilfried Karmaus, Carmen J Marsit, Marie-France Hivert, Harold Snieder, M Daniele Fallin, Erik Melén, Monica C Munthe-Kaas, Hasan Arshad, Joseph L Wiemels, Isabella Annesi-Maesano, Martine Vrijheid, Emily Oken, Nina Holland, Susan K Murphy, Thorkild I A Sørensen, Gerard H Koppelman, John P Newnham, Allen J Wilcox, Wenche Nystad, Stephanie J London, Janine F Felix, Caroline L Relton
Pre-pregnancy maternal obesity is associated with adverse offspring outcomes at birth and later in life. Individual studies have shown that epigenetic modifications such as DNA methylation could contribute. Within the Pregnancy and Childhood Epigenetics (PACE) Consortium, we meta-analysed the association between pre-pregnancy maternal BMI and methylation at over 450,000 sites in newborn blood DNA, across 19 cohorts (9,340 mother-newborn pairs). We attempted to infer causality by comparing the effects of maternal versus paternal BMI and incorporating genetic variation...
October 15, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29016615/characterization-of-the-rotating-exercise-quantification-system-reqs-a-novel-drosophila-exercise-quantification-apparatus
#20
Louis Patrick Watanabe, Nicole C Riddle
Obesity is a disease that has reached epidemic proportions in the United States and has prompted international legislation in an attempt to curtail its prevalence. Despite the fact that one of the most prescribed treatment options for obesity is exercise, the genetic mechanisms underlying exercise response in individuals are still largely unknown. The fruit fly Drosophila melanogaster is a promising new model for studying exercise genetics. Currently, the lack of an accurate method to quantify the amount of exercise performed by the animals is limiting the utility of the Drosophila model for exercise genetics research...
2017: PloS One
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