keyword
MENU ▼
Read by QxMD icon Read
search

Epigenetics obesity

keyword
https://www.readbyqxmd.com/read/29144594/on-the-origin-of-obesity-identifying-the-biological-environmental-and-cultural-drivers-of-genetic-risk-among-human-populations
#1
REVIEW
A Qasim, M Turcotte, R J de Souza, M C Samaan, D Champredon, J Dushoff, J R Speakman, D Meyre
Genetic predisposition to obesity presents a paradox: how do genetic variants with a detrimental impact on human health persist through evolutionary time? Numerous hypotheses, such as the thrifty genotype hypothesis, attempt to explain this phenomenon yet fail to provide a justification for the modern obesity epidemic. In this critical review, we appraise existing theories explaining the evolutionary origins of obesity and explore novel biological and sociocultural agents of evolutionary change to help explain the modern-day distribution of obesity-predisposing variants...
November 16, 2017: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29138870/insig2-rs7566605-single-nucleotide-variant-and-global-dna-methylation-index-levels-are-associated-with-weight-loss-in-a-personalized-weight-reduction-program
#2
Francesca Pirini, Sebastian Rodriguez-Torres, Bola Grace Ayandibu, María Orera-Clemente, Alberto Gonzalez-de la Vega, Fahcina Lawson, Roland J Thorpe, David Sidransky, Rafael Guerrero-Preston
Single nucleotide polymorphisms associated with lipid metabolism and energy balance are implicated in the weight loss response caused by nutritional interventions. Diet‑induced weight loss is also associated with differential global DNA methylation. DNA methylation has been proposed as a predictive biomarker for weight loss response. Personalized biomarkers for successful weight loss may inform clinical decisions when deciding between behavioral and surgical weight loss interventions. The aim of the present study was to investigate the association between global DNA methylation, genetic variants associated with energy balance and lipid metabolism, and weight loss following a non‑surgical weight loss regimen...
November 14, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29138005/distinct-hypoxic-regulation-of-preadipocyte-factor-1-pref-1-in-preadipocytes-and-mature-adipocytes
#3
Yunwon Moon, Seongyeol Lee, Bongju Park, Hyunsung Park
Preadipocyte factor-1 (Pref-1) is a secretory soluble protein, which exerts pleiotropic effects on maintenance of cancer stem cell characteristics and commitment of mesenchymal stem cell lineages by inhibiting adipogenesis. Observations that obesity renders the microenvironment of adipose tissues hypoxic and that hypoxia inhibits adipogenesis lead us to investigate whether hypoxia increases the expression of anti-adipogenic Pref-1 in preadipocytes, mature adipocytes, and adipose tissues from obese mouse. In 3T3-L1 preadipocytes, hypoxia induces Pref-1 by a hypoxia-inducible factor 1 (HIF-1)-dependent mechanism accompanied by increase in the levels of the active histone mark, acetylated H3K9/14 (H3K9/14Ac)...
November 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29135487/update-on-endocrine-aspects-of-childhood-obesity
#4
Charumathi Baskaran, Nurgun Kandemir
PURPOSE OF REVIEW: Although childhood obesity has leveled off in the last decade, 'severe obesity' continues to be on the rise. Various genetic, environmental and hormonal factors contribute to obesity. This article reviews the most current understanding of obesity's multifactorial origin and recent recommendations for its management in childhood and adolescence. RECENT FINDINGS: Epigenetics plays a key role in transmitting obesity risk to offspring. Single-nucleotide polymorphisms at genetic loci for adipokines and their receptors are associated with obesity...
November 11, 2017: Current Opinion in Endocrinology, Diabetes, and Obesity
https://www.readbyqxmd.com/read/29132743/nuclear-sirtuins-and-inflammatory-signaling-pathways
#5
REVIEW
Keila Lopes Mendes, Deborah de Farias Lelis, Sérgio Henrique Sousa Santos
The regulation of chronic inflammation has received considerable research attention in recent years because of its contribution to the pathogenesis of chronic diseases such as arthritis, diabetes, metabolic syndrome and obesity. Thus, strategies that inhibit the inflammatory state may be beneficial in improving the pathophysiology of several inflammation-related disorders. Sirtuins are a family of histone deacetylases that contain seven enzymatic activities in mammals (SIRT1-SIRT7) and function to suppress gene transcription by epigenetic mechanisms...
November 7, 2017: Cytokine & Growth Factor Reviews
https://www.readbyqxmd.com/read/29123667/paternal-obesity-how-bad-is-it-for-sperm-quality-and-progeny-health
#6
Georges Raad, Mira Hazzouri, Silvia Bottini, Michele Trabucchi, Joseph Azoury, Valérie Grandjean
There is substantial evidence that paternal obesity is associated not only with an increased incidence of infertility, but also with an increased risk of metabolic disturbance in adult offspring. Apparently, several mechanisms may contribute to the sperm quality alterations associated with paternal obesity, such as physiological/hormonal alterations, oxidative stress, and epigenetic alterations. Along these lines, modifications of hormonal profiles namely reduced androgen levels and elevated estrogen levels, were found associated with lower sperm concentration and seminal volume...
2017: Basic and Clinical Andrology
https://www.readbyqxmd.com/read/29121255/adipocyte-expression-of-slc19a1-links-dna-hypermethylation-to-adipose-tissue-inflammation-and-insulin-resistance
#7
Paul Petrus, Lucia Bialesova, Antonio Checa, Alastair Kerr, Shama Naz, Jesper Bäckdahl, Ana Gracia, Sofia Toft, Karin Dahlman-Wright, Per Hedén, Ingrid Dahlman, Craig E Wheelock, Peter Arner, Niklas Mejhert, Hui Gao, Mikael Rydén
Context: Insulin resistance (IR) is promoted by a chronic low-grade inflammation in white adipose tissue (WAT). The latter may be regulated through epigenetic mechanisms such as DNA-methylation. The one carbon cycle (1CC) is a central metabolic process governing DNA-methylation. Objective: To identify adipocyte-expressed 1CC genes linked to WAT inflammation, IR and their causal role. Design: Cohort study. Setting: Outpatient academic clinic...
November 7, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29105382/hypoxia-from-placental-development-to-fetal-programming
#8
REVIEW
Lais Fajersztajn, Mariana Matera Veras
Hypoxia may influence normal and different pathological processes. Low oxygenation activates a variety of responses, many of them regulated by hypoxia-inducible factor 1 complex, which is mostly involved in cellular control of O2 consumption and delivery, inhibition of growth and development, and promotion of anaerobic metabolism. Hypoxia plays a significant physiological role in fetal development; it is involved in different embryonic processes, for example, placentation, angiogenesis, and hematopoiesis. More recently, fetal hypoxia has been associated directly or indirectly with fetal programming of heart, brain, and kidney function and metabolism in adulthood...
October 16, 2017: Birth defects research
https://www.readbyqxmd.com/read/29102386/understanding-the-biology-of-thermogenic-fat-is-browning-a-new-approach-to-the-treatment-of-obesity
#9
REVIEW
Ariana Vargas-Castillo, Rebeca Fuentes-Romero, Leonardo A Rodriguez-Lopez, Nimbe Torres, Armando R Tovar
Obesity is characterized by an excess of white adipose tissue (WAT). Recent evidence has demonstrated that WAT can change its phenotype to a brown-like adipose tissue known as beige/brite adipose tissue. This transition is characterized by an increase in thermogenic capacity mediated by uncoupling protein 1 (UCP1). This browning process is a potential new target for treating obesity. The aim of this review is to integrate the different mechanisms by which beige/brite adipocytes are formed and to describe the physiological, pharmacological and nutritional inducers that can promote browning...
November 1, 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/29101051/histone-methyltransferase-g9a-modulates-hepatic-insulin-signaling-via-regulating-hmga1
#10
Weili Xue, Jin Huang, Hong Chen, Yu Zhang, Xiuqin Zhu, Jianshuang Li, Wenquan Zhang, Yangmian Yuan, Yan Wang, Ling Zheng, Kun Huang
Hepatic insulin sensitivity is critical for glucose homeostasis, and insulin resistance is a fundamental syndrome found in various metabolic disorders, including obesity and type 2 diabetes. Despite considerable studies on the mechanisms of hepatic insulin resistance, the link between epigenetic regulation and the development of insulin resistance remains elusive. Here, we reported that G9a/EHMT2, a histone methyltransferase, was markedly decreased in the liver of db/db mice and high-fat diet (HFD)-fed mice...
October 31, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29099282/dna-methylation-and-obesity-traits-an-epigenome-wide-association-study-the-regicor-study
#11
Sergi Sayols-Baixeras, Isaac Subirana, Alba Fernández-Sanlés, Mariano Sentí, Carla Lluís-Ganella, Jaume Marrugat, Roberto Elosua
Obesity is associated with increased risk of several diseases and has become epidemic. Obesity is highly heritable but the genetic variants identified by genome-wide association studies explain only limited variability. Epigenetics could contribute to explain the missing variability. The study aim was to discover differential methylation patterns related to obesity. We designed an epigenome-wide association study with a discovery phase in a subsample of 641 REGICOR study participants, validated by analysis of 2,515 participants in the Framingham Offspring Study...
November 3, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/29099273/dna-methylation-profiles-in-sibling-pairs-discordant-for-intrauterine-exposure-to-maternal-gestational-diabetes
#12
Eunae Kim, Soo Heon Kwak, Hye Rim Chung, Jung Hun Ohn, Jae Hyun Bae, Sung Hee Choi, Kyong Soo Park, Joon-Seok Hong, Joohon Sung, Hak Chul Jang
Intrauterine exposure to hyperglycemia is reported to confer increased metabolic risk in later life, supporting the 'developmental origins of health and disease' hypothesis. Epigenetic alterations are suggested as one of the possible underlying mechanisms. In this study, we compared pairwise DNA methylation differences between siblings whose intrauterine exposure to maternal gestational diabetes (GDM) were discordant. Methylation of peripheral blood DNA of 18 sibling pairs was measured using Infinium HumanMethylation450 BeadChip assays...
November 3, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/29094436/low-level-perfluorooctanoic-acid-enhances-3%C3%A2-t3-l1-preadipocyte-differentiation-via-altering-peroxisome-proliferator-activated-receptor-gamma-expression-and-its-promoter-dna-methylation
#13
Yue Ma, Jie Yang, Yanjian Wan, Yang Peng, Shuai Ding, Yuanyuan Li, Bing Xu, Xi Chen, Wei Xia, Yuebin Ke, Shunqing Xu
Recent studies suggest that perfluorooctanoic acid (PFOA) can play a role in the development of obesity; however, the associated mechanisms are poorly understood. We investigated how PFOA exposure affected the differentiation of 3 T3-L1 preadipocytes and the associated transcriptional and epigenetic mechanisms. Cells treated with different doses of PFOA (ranging from 0.01 to 100 μg ml(-1) ) were assessed for proliferation, differentiation and triglyceride accumulation. The gene expression levels of peroxisome proliferator activated receptor gamma (PPARγ) and its target genes were measured...
November 2, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/29081689/assessing-the-heritability-of-complex-traits-in-humans-methodological-challenges-and-opportunities
#14
REVIEW
Alexandra J Mayhew, David Meyre
The goal of this review article is to provide a conceptual based summary of how heritability estimates for complex traits such as obesity are determined and to explore the future directions of research in the heritability field. The target audience are researchers who use heritability data rather than those conducting heritability studies. The article provides an introduction to key concepts critical to understanding heritability studies including: i) definitions of heritability: broad sense versus narrow sense heritability; ii) how data for heritability studies are collected: twin, adoption, family and population-based studies; and iii) analytical techniques: path analysis, structural equations and mixed or regressive models of complex segregation analysis...
August 2017: Current Genomics
https://www.readbyqxmd.com/read/29080342/cross-talk-between-bile-acids-and-gastro-intestinal-and-thermogenic-clues-from-bariatric-surgery
#15
Gabriella Garruti, Agostino Di Ciaula, Helen H Wang, David Q-H Wang, Piero Portincasa
Obesity is rapidly increasing and has reached epidemic features worldwide. It´s linked to insulin resistance, systemic low-grade inflammation and common pathogenic pathways with a number of comorbidities (including cancer), leading to high mortality rates. Besides change of lifestyles (diet and physical exercise) and pharmacological therapy, bariatric surgery is able to rapidly improve several metabolic and morphologic features associated with excessive fat storage, and currently represents an in vivo model to study the pathogenic mechanisms underlying obesity and obesity-related complications...
October 28, 2017: Annals of Hepatology
https://www.readbyqxmd.com/read/29077881/interplay-among-h3k9-editing-enzymes-suv39h1-jmjd2c-and-src-1-drives-p66shc-transcription-and-vascular-oxidative-stress-in-obesity
#16
Sarah Costantino, Francesco Paneni, Agostino Virdis, Shafaat Hussain, Shafeeq Ahmed Mohammed, Giuliana Capretti, Alexander Akhmedov, Kevin Dalgaard, Sergio Chiandotto, J Andrew Pospisilik, Thomas Jenuwein, Marco Giorgio, Massimo Volpe, Stefano Taddei, Thomas F Lüscher, Francesco Cosentino
Aims: Accumulation of reactive oxygen species (ROS) promotes vascular disease in obesity, but the underlying molecular mechanisms remain poorly understood. The adaptor p66Shc is emerging as a key molecule responsible for ROS generation and vascular damage. This study investigates whether epigenetic regulation of p66Shc contributes to obesity-related vascular disease. Methods and results: ROS-driven endothelial dysfunction was observed in visceral fat arteries (VFAs) isolated from obese subjects when compared with normal weight controls...
October 25, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29077558/-the-genetics-of-obesity-pathogenetic-clinical-and-diagnostic-aspects
#17
Artur Barczyk, Anna Kutkowska-Kaźmierczak, Jennifer Castañeda, Ewa Obersztyn
Due to its prevalence and its health-related, economic and social consequences, childhood and adult obesity is a complex, medical and civilizational problem, which has been on the increase in the last decade. The results of multi-center investigations reveal that genetic factors play an essential role in the etiopathogenesis of obesity, particularly in the case of extreme cases with very early onset. The Body Mass Index (BMI) is one of the most frequently used indicators of obesity and shows a strong genetic component with a 40-70% degree of heritability...
2017: Developmental Period Medicine
https://www.readbyqxmd.com/read/29073779/mitochondrial-nad-nadh-redox-state-and-diabetic-cardiomyopathy
#18
Jessica M Berthiaume, Jacob G Kurdys, Danina M Muntean, Mariana G Rosca
SIGNIFICANCE: Diabetic cardiomyopathy is a frequent complication occurring even in well-controlled asymptomatic diabetic patients, and may advance to heart failure. Recent advances: The diabetic heart is characterized by a state of "metabolic rigidity" involving enhanced rates of fatty acid uptake and mitochondrial oxidation as the predominant energy source, and exhibits mitochondrial electron transport chain defects. These alterations promote redox state changes evidenced by a decreased NAD+/NADH ratio associated with an increase in acetyl-CoA/CoA ratio...
October 26, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29067487/epigenetic-modifications-of-the-zfp-znf423-gene-control-murine-adipogenic-commitment-and-are-dysregulated-in-human-hypertrophic-obesity
#19
Michele Longo, Gregory A Raciti, Federica Zatterale, Luca Parrillo, Antonella Desiderio, Rosa Spinelli, Ann Hammarstedt, Shahram Hedjazifar, Jenny M Hoffmann, Cecilia Nigro, Paola Mirra, Francesca Fiory, Pietro Formisano, Claudia Miele, Ulf Smith, Francesco Beguinot
AIMS/HYPOTHESIS: Subcutaneous adipocyte hypertrophy is associated with insulin resistance and increased risk of type 2 diabetes, and predicts its future development independent of obesity. In humans, subcutaneous adipose tissue hypertrophy is a consequence of impaired adipocyte precursor cell recruitment into the adipogenic pathway rather than a lack of precursor cells. The zinc finger transcription factor known as zinc finger protein (ZFP) 423 has been identified as a major determinant of pre-adipocyte commitment and maintained white adipose cell function...
October 24, 2017: Diabetologia
https://www.readbyqxmd.com/read/29064478/dna-methylation-in-blood-from-neonatal-screening-cards-and-the-association-with-bmi-and-insulin-sensitivity-in-early-childhood
#20
S J van Dijk, T J Peters, M Buckley, J Zhou, P A Jones, R A Gibson, M Makrides, B S Muhlhausler, P L Molloy
BACKGROUND/OBJECTIVES: There is increasing evidence that metabolic diseases originate in early life, and epigenetic changes have been implicated as key drivers of this early life programming. This led to the hypothesis that epigenetic marks present at birth may predict an individual's future risk of obesity and type 2 diabetes. In this study, we assessed whether epigenetic marks in blood of newborn children were associated with body mass index (BMI) and insulin sensitivity later in childhood...
September 25, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
keyword
keyword
8383
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"