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obesity and genetic

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https://www.readbyqxmd.com/read/28811369/obesity-associated-gene-tmem18-has-a-role-in-the-central-control-of-appetite-and-body-weight-regulation
#1
Rachel Larder, M F Michelle Sim, Pawan Gulati, Robin Antrobus, Y C Loraine Tung, Debra Rimmington, Eduard Ayuso, Joseph Polex-Wolf, Brian Y H Lam, Cristina Dias, Darren W Logan, Sam Virtue, Fatima Bosch, Giles S H Yeo, Vladimir Saudek, Stephen O'Rahilly, Anthony P Coll
An intergenic region of human chromosome 2 (2p25.3) harbors genetic variants which are among those most strongly and reproducibly associated with obesity. The gene closest to these variants is TMEM18, although the molecular mechanisms mediating these effects remain entirely unknown. Tmem18 expression in the murine hypothalamic paraventricular nucleus (PVN) was altered by changes in nutritional state. Germline loss of Tmem18 in mice resulted in increased body weight, which was exacerbated by high fat diet and driven by increased food intake...
August 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28805745/insulin-resistance-and-nafld-a-dangerous-liaison-beyond-the-genetics
#2
REVIEW
Melania Manco
Over the last decade, the understanding of the association between insulin resistance (IR) and non-alcoholic fatty liver disease (NAFLD) has dramatically evolved. There is clear understanding that carriers of some common genetic variants, i.e., the patatin-like phospholipase domain-containing 3 (PNPLA3) or the transmembrane 6 superfamily member 2 (TM6SF2) are at risk of developing severe forms of NAFLD even in the presence of reduced or absent IR. In contrast, there are obese patients with "metabolic" (non-genetically driven) NAFLD who present severe IR...
August 14, 2017: Children
https://www.readbyqxmd.com/read/28804972/mendelian-randomisation-analysis-provides-no-evidence-for-a-relationship-between-adult-height-and-testicular-cancer-risk
#3
M Levy, D Hall, A Sud, P Law, K Litchfield, D Dudakia, T B Haugen, R Karlsson, A Reid, R A Huddart, T Grotmol, F Wiklund, R S Houlston, C Turnbull
Observational studies have suggested anthropometric traits, particularly increased height are associated with an elevated risk of testicular cancer (testicular germ cell tumour). However, there is an inconsistency between study findings, suggesting the possibility of the influence of confounding factors. To examine the association between anthropometric traits and testicular germ cell tumour using an unbiased approach, we performed a Mendelian randomisation study. We used genotype data from genome wide association studies of testicular germ cell tumour totalling 5518 cases and 19,055 controls...
August 13, 2017: Andrology
https://www.readbyqxmd.com/read/28804621/development-of-gene-polymorphisms-in-meditators-of-nonalcoholic-fatty-liver-disease
#4
Chun Wang, Jianping Gong, Hao Wu
Nonalcoholic fatty liver disease (NAFLD) is the most prevalent liver disease worldwide, the morbidity of which closely correlates with diversity of ethnicity, minority, family and location. Its histology spans from simple steatosis, to nonalcoholic steatohepatitis, which ultimately results in fibrosis, cirrhosis and hepatocellular carcinoma. The accelerating prevalence of NAFLD is due to an incremental incidence of metabolic syndrome that is distinguished by dyslipidemia, glucose impairment, obesity, excessive oxidative stress and adipocytokine impairment...
August 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28804483/the-impact-of-western-diet-and-nutrients-on-the-microbiota-and-immune-response-at-mucosal-interfaces
#5
REVIEW
Donjete Statovci, Mònica Aguilera, John MacSharry, Silvia Melgar
Recent findings point toward diet having a major impact on human health. Diets can either affect the gut microbiota resulting in alterations in the host's physiological responses or by directly targeting the host response. The microbial community in the mammalian gut is a complex and dynamic system crucial for the development and maturation of both systemic and mucosal immune responses. Therefore, the complex interaction between available nutrients, the microbiota, and the immune system are central regulators in maintaining homeostasis and fighting against invading pathogens at mucosal sites...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28803384/does-obesity-modify-the-relationship-between-physical-activity-and-breast-cancer-risk
#6
REVIEW
S E Neil-Sztramko, T Boyle, E Milosevic, S F Nugent, C C Gotay, K L Campbell
PURPOSE: With only 5-10% of breast cancer cases attributed to genetic inheritance, prevention efforts have focused on modifiable risk factors. Physical activity plays a role in reducing breast cancer risk; however, the interaction between physical activity and other modifiable risk factors, such as obesity, has received little attention. METHODS: A systematic review and meta-analysis was conducted of studies examining the relationship between physical activity and breast cancer and how it may be modified by body mass index (BMI)...
August 12, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28799494/contribution-of-large-animals-to-translational-research-on-prenatal-programming-of-obesity-and-associated-diseases
#7
Antonio Gonzalez-Bulnes, Pascale Chavatte-Palmer
BACKGROUND: The awareness of factors causing obesity and associated disorders has grown up in the last years from genome to a more complicated concept (developmental programming) in which prenatal and early-postnatal conditions markedly modify the phenotype and homeostasis of the individuals and determine juvenile growth, life-time fitness/obesity and disease risks. Experimentation in human beings is impeded by ethical issues plus inherent high variability and confounding factors (genetics, lifestyle and socioeconomic heterogeneity) and preclinical studies in adequate translational animal models are therefore decisive...
August 11, 2017: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/28799434/metabolic-biomarkers-and-gallstone-disease-a-population-based-study
#8
Daniel Mønsted Shabanzadeh, Tea Skaaby, Lars Tue Sørensen, Jesper Eugen-Olsen, Torben Jørgensen
OBJECTIVES: The objectives for this study were to examine the associations between metabolic biomarkers of obesity including insulin resistance, vascular dysfunction, systemic inflammation, genetic susceptibility and ultrasound proven gallstone disease or cholecystectomy in a population-based cross-sectional study. MATERIAL AND METHODS: A total of 2650 participants were included, of whom 422 had gallstone disease. Associations between selected metabolic biomarkers and gallstone disease were estimated by multivariable logistic regression models and expressed as odds ratio (OR) and 95% confidence interval (CI)...
August 11, 2017: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/28797265/risk-and-predictors-of-psoriasis-in-patients-with-breast-cancer-a-swedish-population-based-cohort-study
#9
Haomin Yang, Judith S Brand, Jingmei Li, Jonas F Ludvigsson, Emilio Ugalde-Morales, Flaminia Chiesa, Per Hall, Kamila Czene
BACKGROUND: The risk of psoriasis in patients with breast cancer is largely unknown, as available evidence is limited to case findings. We systematically examined the incidence and risk factors of psoriasis in patients with breast cancer. METHODS: A Swedish nationwide cohort of 56,235 breast cancer patients (2001-2012) was compared to 280,854 matched reference individuals from the general population to estimate the incidence and hazard ratio (HR) of new-onset psoriasis...
August 11, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28795262/growth-factor-energy-and-nutrient-sensing-signalling-pathways-in-metabolic-ageing
#10
Lucia Bettedi, Lazaros C Foukas
The field of the biology of ageing has received increasing attention from a biomedical point of view over the past decades. The main reason has been the realisation that increases in human population life expectancy are accompanied by late onset diseases. Indeed, ageing is the most important risk factor for a number of neoplastic, neurodegenerative and metabolic pathologies. Advances in the knowledge of the genetics of ageing, mainly through research in model organisms, have implicated various cellular processes and the respective signalling pathways that regulate them in cellular and organismal ageing...
August 9, 2017: Biogerontology
https://www.readbyqxmd.com/read/28792545/contribution-of-independent-and-pleiotropic-genetic-effects-in-the-metabolic-syndrome-in-a-hypertensive-rat
#11
Man Chun John Ma, Janette M Pettus, Jessica A Jakoubek, Matthew G Traxler, Karen C Clark, Amanda K Mennie, Anne E Kwitek
Hypertension is a major risk factor for cardiovascular disease, Type 2 diabetes, and end organ failure, and is often found concomitant with disorders characteristic of the Metabolic Syndrome (MetS), including obesity, dyslipidemia, and insulin resistance. While the associated features often occur together, the pathway(s) or mechanism(s) linking hypertension in MetS are not well understood. Previous work determined that genetic variation on rat chromosome 17 (RNO17) contributes to several MetS-defining traits (including hypertension, obesity, and dyslipidemia) in the Lyon Hypertensive (LH) rat, a genetically determined MetS model...
2017: PloS One
https://www.readbyqxmd.com/read/28790540/the-effect-of-adolescent-idiopathic-scoliosis-on-the-occurrence-of-varicose-veins-on-lower-extremities
#12
Goran Talic, Luka Talic, Djurdjica Stevanovic-Papica, Tatjana Nozica-Radulovic, Snjezana Novakovic-Bursac
INTRODUCTION: Scoliosis is a complex three-dimensional spine deformity with the frontal plane deflexion (side-shift) of the series of vertebra from the midline and with torque deformity of vertebra, ribs, and the entire trunk towards the apex of curve. Chronic venous diseases present a group of pathological conditions caused by the increased venous pressure. The venous pressure may be increased due to genetics, ligament laxity, general obesity, injuries, and changes in biomechanics of spine and lower extremities, etc...
April 2017: Medical Archives
https://www.readbyqxmd.com/read/28790027/increased-mitochondrial-calcium-uniporter-in-adipocytes-underlies-mitochondrial-alterations-associated-with-insulin-resistance
#13
Lauren E Wright, Denis Vecellio Reane, Gabriella Milan, Anna Terrin, Giorgia di Bello, Anna Belligoli, Marta Sanna, Mirto Foletto, Francesca Favaretto, Anna Raffaello, Cristina Mammucari, Donato Nitti, Roberto Vettor, Rosario Rizzuto
Intracellular calcium influences an array of pathways and affects cellular processes. With the rapidly progressing research investigating the molecular identity and the physiological roles of the Mitochondrial Calcium Uniporter (MCU) complex, we now have the tools to understand the functions of mitochondrial Ca(2+) in the regulation of pathophysiological processes. Herein, we describe the role of key MCU complex components in insulin resistance in mouse and human adipose tissue. Adipose tissue gene expression was analysed from several models of obese and diabetic rodents and in obese patients, as well as in vitro insulin-resistant adipocytes...
August 8, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28780073/the-epidemiology-of-esophageal-adenocarcinoma
#14
Helen G Coleman, Shao-Hua Xie, Jesper Lagergren
The incidence of esophageal adenocarcinoma (EAC) has increased in many Western countries, and is higher in men than women. Some risk factors for EAC have been identified-mainly gastroesophageal reflux disease (GERD), Barrett's esophagus, obesity, and tobacco smoking. It is not clear whether interventions to address these factors can reduce risk of EAC, although some evidence exists for smoking cessation. Although consumption of alcohol is not associated with EAC risk, other exposures, such as physical activity, nutrition, and medication use, require further study...
August 2, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28779908/differential-effects-of-voluntary-treadmill-exercise-and-caloric-restriction-on-tau-pathogenesis-in-a-mouse-model-of-alzheimer-s-disease-like-tau-pathology-fed-with-western-diet
#15
Maud Gratuze, Jacinthe Julien, Françoise Morin, André Marette, Emmanuel Planel
BACKGROUND: Tau is a microtubule-associated protein that becomes pathological when it undergoes hyperphosphorylation and aggregation as seen in Alzheimer's disease (AD). AD is mostly sporadic, with environmental, biological and/or genetic risks factors, interacting together to promote the disease. In the past decade, reports have suggested that obesity in midlife could be one of these risk factors. On the other hand, caloric restriction and physical exercise have been reported to reduce the incidence and outcome of obesity as well as AD...
August 3, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28777946/engineered-epidermal-progenitor-cells-can-correct-diet-induced-obesity-and-diabetes
#16
Jiping Yue, Xuewen Gou, Yuanyuan Li, Barton Wicksteed, Xiaoyang Wu
Somatic gene therapy is a promising approach for treating otherwise terminal or debilitating diseases. The human skin is a promising conduit for genetic engineering, as it is the largest and most accessible organ, epidermal autografts and tissue-engineered skin equivalents have been successfully deployed in clinical applications, and skin epidermal stem/progenitor cells for generating such grafts are easy to obtain and expand in vitro. Here, we develop skin grafts from mouse and human epidermal progenitors that were engineered by CRISPR-mediated genome editing to controllably release GLP-1 (glucagon-like peptide 1), a critical incretin that regulates blood glucose homeostasis...
August 3, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28777938/engineering-skin-with-skinny-genes
#17
Anika Böttcher, Heiko Lickert, Matthias Tschöp
The increasing prevalence of obesity and diabetes is an urgent worldwide health challenge. Now in Cell Stem Cell, Yue et al. (2017) report a proof-of-concept study using genetically engineered skin transplants that produce the incretin GLP-1 to prevent diet-induced obesity, suggesting a powerful approach for treating metabolic disorders.
August 3, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28775376/altered-circadian-feeding-behavior-and-improvement-of-metabolic-syndrome-in-obese-tac1-deficient-mice
#18
C A Maguire, S León, R S Carroll, U B Kaiser, V M Navarro
BACKGROUND: Metabolic function is regulated by the interplay of central and peripheral factors that ultimately regulate food intake and energy expenditure. The tachykinin substance P (SP) has been identified as a novel regulator of energy balance, however, the mechanisms underlying this effect are ill-defined and conflicting data regarding the role of SP on food intake have been reported by different groups. OBJECTIVE: To further characterize the metabolic role of the Tac1 gene products (SP and neurokinin A (NKA)) in mice through a series of genetic, metabolic and behavioral studies in Tac1 deficient mice...
August 4, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28774683/dietary-linoleic-acid-interacts-with-fads1-genetic-variability-to-modulate-hdl-cholesterol-and-obesity-related-traits
#19
Julie Dumont, Louisa Goumidi, Benjamin Grenier-Boley, Dominique Cottel, Nadine Marécaux, Michèle Montaye, Aline Wagner, Dominique Arveiler, Chantal Simon, Jean Ferrières, Jean-Bernard Ruidavets, Philippe Amouyel, Jean Dallongeville, Aline Meirhaeghe
BACKGROUND & AIMS: Blood levels of polyunsaturated fatty acids (PUFAs) are under control of endogenous synthesis via Δ5- and Δ6-desaturases, encoded by the FADS1 and FADS2 genes, respectively and of diet. Genome-wide associations studies (GWAS) reported associations between polymorphisms in FADS1-FADS2 and variations in plasma concentrations of PUFAs, HDL- and LDL-cholesterol and triglycerides. However, it is not established whether dietary PUFAs intake modulates these associations...
July 20, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28771698/molecular-and-functional-genetics-of-the-proopiomelanocortin-gene-food-intake-regulation-and-obesity
#20
REVIEW
Marcelo Rubinstein, Malcolm J Low
During the last decade, the obesity pandemia has skyrocketed, and the spectre is threatening children, adolescents and lower income families worldwide. Although driven by an increase in the consumption of ultra-processed edibles of poor nutritional value, the obesogenic changes in contemporary human lifestyle affect people differently, revealing that some individuals are more prone to developing increased adiposity. During the last years, we performed a variety of genetic, evolutionary, biochemical and behavioral experiments that allowed us to understand how a group of neurons present in the arcuate nucleus of the hypothalamus regulate the expression of the proopiomelanocortin (Pomc) gene and induce satiety...
August 3, 2017: FEBS Letters
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