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obesity genetics

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https://www.readbyqxmd.com/read/28078092/severe-obesity-emotions-and-eating-habits-a-case-control-study
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
https://www.readbyqxmd.com/read/28073764/causal-effect-of-genetic-variants-associated-with-body-mass-index-on-multiple-sclerosis-susceptibility
#10
Milena A Gianfrancesco, M Maria Glymour, Stefan Walter, Brooke Rhead, Xiaorong Shao, Ling Shen, Hong Quach, Alan Hubbard, Ingileif Jónsdóttir, Kári Stefánsson, Pernilla Strid, Jan Hillert, Anna Hedström, Tomas Olsson, Ingrid Kockum, Catherine Schaefer, Lars Alfredsson, Lisa F Barcellos
Multiple sclerosis (MS) is an autoimmune disease with both genetic and environmental risk factors. Recent studies indicate that childhood and adolescent obesity double the risk of MS, but this association may reflect unmeasured confounders rather than causal effects of obesity. We used separate-sample Mendelian randomization to estimate the causal effect of body mass index (BMI) on susceptibility to MS. Using data from non-Hispanic white members of the Kaiser Permanente Medical Care Plan of Northern California (KPNC) (2006-2014; 1,104 cases of MS and 10,536 controls) and a replication data set from Sweden (the Epidemiological Investigation of MS (EIMS) and the Genes and Environment in MS (GEMS) studies, 2005-2013; 5,133 MS cases and 4,718 controls), we constructed a weighted genetic risk score using 97 variants previously established to predict BMI...
January 9, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28071834/molecular-profiling-of-human-ips-derived-hypothalamic-neurons-provides-developmental-insights-to-genetic-loci-for-body-weight-regulation
#11
Li Yao, Yuanhang Liu, Zhifang Qiu, Satish Kumar, Joanne E Curran, John Blangero, Yidong Chen, Donna M Lehman
BACKGROUND/OBJECTIVES: Recent data suggests that common genetic risk for metabolic disorders such as obesity may be human-specific and exert effects through the central nervous system. To overcome the limitation of human tissue access for study, we have generated induced human pluripotent stem cell (hiPSC)-derived neuronal cultures which recapture many features of hypothalamic neurons within the arcuate nucleus. Here we have comprehensively characterized this model across development, benchmarked these neurons to in vivo events, and demonstrate a link between obesity risk variants and hypothalamic development...
January 10, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28070563/gut-microbiome-of-the-canadian-arctic-inuit
#12
Catherine Girard, Nicolas Tromas, Marc Amyot, B Jesse Shapiro
Diet is a major determinant of community composition in the human gut microbiome, and "traditional" diets have been associated with distinct and highly diverse communities, compared to Western diets. However, most traditional diets studied have been those of agrarians and hunter-gatherers consuming fiber-rich diets. In contrast, the Inuit of the Canadian Arctic have been consuming a traditional diet low in carbohydrates and rich in animal fats and protein for thousands of years. We hypothesized that the Inuit diet and lifestyle would be associated with a distinct microbiome...
January 2017: MSphere
https://www.readbyqxmd.com/read/28068485/obesity-in-low-and-middle-income-countries-burden-drivers-and-emerging-challenges
#13
Nicole D Ford, Shivani A Patel, K M Venkat Narayan
We have reviewed the distinctive features of excess weight, its causes, and related prevention and management efforts, as well as data gaps and recommendations for future research in low- and middle-income countries (LMICs). Obesity is rising in every region of the world, and no country has been successful at reversing the epidemic once it has begun. In LMICs, overweight is higher in women compared with men, in urban compared with rural settings, and in older compared with younger individuals; however, the urban-rural overweight differential is shrinking in many countries...
December 23, 2016: Annual Review of Public Health
https://www.readbyqxmd.com/read/28067456/type-2-diabetes-mellitus-associated-with-the-interaction-of-lrp5-polymorphism-and-overweight-and-obesity-in-rural-chinese-adults
#14
Zhang Lu, Wang Jinjin, Zhang Ming, Wang Guo'an, Shen Yanxia, Wu Dongting, Wang Chongjian, Li Linlin, Ren Yongcheng, Wang Bingyuan, Zhang Hongyan, Yang Xiangyu, Zhao Yang, Han Chengyi, Zhou Junmei, Pang Chao, Yin Lei, Zhao Jingzhi, Luo Xinping, Hu Dongsheng
BACKGROUND: Low-density lipoprotein receptor-related protein 5 (LRP5) plays an important role in glucose and cholesterol metabolism, so a cohort study was used to evaluate the association of LRP5 variants and incidence of type 2 diabetes mellitus (T2DM) in a rural adult Chinese population. METHODS: A total of 7751 subjects ≥18 years old and without T2DM underwent genotyping at baseline; 6326 subjects (81.62%) were followed-up, with 5511 eligible for this analysis...
January 9, 2017: Journal of Diabetes
https://www.readbyqxmd.com/read/28065514/review-of-childhood-obesity-from-epidemiology-etiology-and-comorbidities-to-clinical-assessment-and-treatment
#15
REVIEW
Seema Kumar, Aaron S Kelly
Childhood obesity has emerged as an important public health problem in the United States and other countries in the world. Currently 1 in 3 children in the United States is afflicted with overweight or obesity. The increasing prevalence of childhood obesity is associated with emergence of comorbidities previously considered to be "adult" diseases including type 2 diabetes mellitus, hypertension, nonalcoholic fatty liver disease, obstructive sleep apnea, and dyslipidemia. The most common cause of obesity in children is a positive energy balance due to caloric intake in excess of caloric expenditure combined with a genetic predisposition for weight gain...
January 5, 2017: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/28065479/interaction-between-a-variant-of-cdkn2a-b-gene-with-lifestyle-factors-in-determining-dyslipidemia-and-estimated-cardiovascular-risk-a-step-toward-personalized-nutrition
#16
Mehrane Mehramiz, Faeze Ghasemi, Habibollah Esmaily, Maryam Tayefi, Seyed Mahdi Hassanian, Mahsa Sadeghzade, Fatemeh Sadabadi, Mohsen Moohebati, Mahmoud Reza Azarpazhooh, Seyed Mohammad Reza Parizadeh, Alireza Heidari-Bakavoli, Mohammad Safarian, Mohsen Nematy, Mahmoud Ebrahimi, Mikhail Ryzhikov, Gordon A Ferns, Majid Ghayour-Mobarhan, Amir Avan
BACKGROUND & AIMS: Several genome-wide-association-studies have identified genetic variants in a region on chromosome 9p21 that are associated with an increased risk of Cardiovascular disease (CVD) and diabetes. Here we have explored the interaction of a genetic variant of the CDKN2A/B-rs10811661 gene locus with cardiovascular risk factors and environmental-exposures (e.g., diet and physical activity) in 1165 individuals recruited from the Mashhad-Stroke and Heart-Atherosclerotic-Disorders cohort...
December 28, 2016: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28062415/cardiomyocyte-specific-ablation-of-cd36-accelerates-the-progression-from-compensated-cardiac-hypertrophy-to-heart-failure
#17
Miranda M Sung, Nikole J Byrne, Ty T Kim, Jody Levasseur, Grant Masson, Jamie Boisvenue, Maria Febbraio, Jason R B Dyck
Previous studies have shown that loss of CD36 protects the heart from dysfunction induced by pressure overload in the presence of diet-induced insulin resistance and/or obesity. The beneficial effects of CD36 ablation in this context are mediated by preventing excessive cardiac fatty acid (FA) entry and reducing lipotoxic injury. However, whether or not the loss of CD36 can prevent pressure overload-induced cardiac dysfunction in the absence of chronic exposure to high circulating FAs is currently unknown. To address this, we utilized a tamoxifen inducible cardiomyocyte-specific CD36 knockout (icCD36KO) mouse and genetically deleted CD36 in adulthood...
January 6, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28060975/-prevalence-of-cardiovascular-risk-factors-in-a-rural-aymara-population-from-northern-chile
#18
Pablo Vargas M, Stephanie Saavedra P, María Virginia Araya A, Khanty Loyola A, Patricio Huerta G, Mariana Silva A, Scarlett Araya C, Willybaldo Saavedra A, Pilar Portales P, Willybaldo Saavedra P
BACKGROUND: Some rural non-Caucasian ethnic groups have genetic protective factors for the development of chronic non-communicable diseases. Studies performed in Mapuche and Aymara ethnic groups in Chile, found significantly lower prevalence rates. Aymaras are the second most common ethnic population in Chile. AIM: To determine the prevalence of cardiovascular risk factors in a native Aymara ethnic population. MATERIAL AND METHODS: We studied 276 native Aymara people with a median age of 53 years (63% women), registered in the rural clinics of Camiña and Putre...
September 2016: Revista Médica de Chile
https://www.readbyqxmd.com/read/28059614/western-diets-gut-dysbiosis-and-metabolic-diseases-are-they-linked
#19
Kristina B Martinez, Vanessa Leone, Eugene B Chang
Obesity afflicts 36.5% of the US population and 600 million individuals world-wide. Thus, it is imperative to understand the risk factors underlying metabolic disease including diet, activity level, sleep, and genetics. Another key contributory factor is the gut microbiota given its widely reported role in the development of metabolic disease. The gut microbiota, particularly its structure and function, is heavily influenced by Western style diets rich in a complex mixture of fats and high in simple sugars...
January 6, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28057582/a-nutritional-perspective-on-ucp1-dependent-thermogenesis
#20
REVIEW
M Luisa Bonet, Josep Mercader, Andreu Palou
Uncoupling protein 1 (UCP1) is the hallmark protein responsible for cold- and diet-induced thermogenesis in brown adipose tissue (BAT). UCP1 activity is protective against body fat accumulation. UCP1 has re-gained researchers' attention in the context of obesity following the realization that BAT is present and can be activated in adult humans and of inducible UCP1-expressing cells in white fat depots. UCP1-mediated thermogenesis is activated by specific food compounds, which function by stimulating sympathetic nervous system activity to adipose tissues and/or by acting on the adipose cells directly or indirectly, through humoral factors released upon their intake...
January 2, 2017: Biochimie
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