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obesity and genetic

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https://www.readbyqxmd.com/read/27913995/adenoma-prevalence-and-distribution-among-us-latino-subgroups-undergoing-screening-colonoscopy
#1
Sumedha V Chablani, Lina Jandorf, Katherine DuHamel, Kristen K Lee, Pathu Sriphanlop, Cristina Villagra, Steven H Itzkowitz
BACKGROUND: Colorectal cancer (CRC) is the second leading malignancy diagnosed among US Latinos. Latinos in the USA represent a heterogeneous amalgam of subgroups varying in genetic background, culture, and socioeconomic status. Little is known about the frequency of CRC precursor lesions found at screening colonoscopy among Latino subgroups. AIM: The aim was to determine the prevalence and distribution of histologically confirmed adenomas found at screening colonoscopy among average-risk, asymptomatic US Latinos according to their subgroup and socio-demographic background...
December 2, 2016: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/27913448/targeting-inflammation-in-cancer-prevention-and-therapy
#2
REVIEW
Jelena Todoric, Laura Antonucci, Michael Karin
Inflammation is associated with the development and malignant progression of most cancers. As most of the cell types involved in cancer-associated inflammation are genetically stable and thus are not subjected to rapid emergence of drug resistance, the targeting of inflammation represents an attractive strategy both for cancer prevention and for cancer therapy. Tumor-extrinsic inflammation is caused by many factors, including bacterial and viral infections, autoimmune diseases, obesity, tobacco smoking, asbestos exposure, and excessive alcohol consumption, all of which increase cancer risk and stimulate malignant progression...
December 2016: Cancer Prevention Research
https://www.readbyqxmd.com/read/27909891/canola-oil-rich-in-oleic-acid-improves-diastolic-heart-function-in-diet-induced-obese-rats
#3
Sijo Joseph Thandapilly, Pema Raj, Xavier Lieben Louis, Danielle Perera, Prasanga Yamanagedara, Peter Zahradka, Carla G Taylor, Thomas Netticadan
Obesity is a leading cause of cardiovascular disease. It directly affects heart structure and function and contributes to heart failure. Diet is a major factor involved in the development of obesity along with genetic factors. We examined the effects of monounsaturated and polyunsaturated fatty acid-rich oils on cardiac structure and function in the diet-induced rodent model of obesity (DIO). Obese prone (OP) rats were fed a high-fat diet (HF; 55% of kcal) for 12 weeks; Sprague-Dawley rats fed commercial chow served as control...
December 1, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27907186/inter-tissue-gene-co-expression-networks-between-metabolically-healthy-and-unhealthy-obese-individuals
#4
Lisette J A Kogelman, Jingyuan Fu, Lude Franke, Jan Willem Greve, Marten Hofker, Sander S Rensen, Haja N Kadarmideen
BACKGROUND: Obesity is associated with severe co-morbidities such as type 2 diabetes and nonalcoholic steatohepatitis. However, studies have shown that 10-25 percent of the severely obese individuals are metabolically healthy. To date, the identification of genetic factors underlying the metabolically healthy obese (MHO) state is limited. Systems genetics approaches have led to the identification of genes and pathways in complex diseases. Here, we have used such approaches across tissues to detect genes and pathways involved in obesity-induced disease development...
2016: PloS One
https://www.readbyqxmd.com/read/27905213/hepatic-lipid-and-genetic-factors-associated-with-obesity-crosstalk-with-alcohol-dependence
#5
Kimberly Goodyear, Mary R Lee, Melanie L Schwandt, Colin A Hodgkinson, Lorenzo Leggio
OBJECTIVES: Alcohol dependence represents a leading cause of mortality and morbidity. Understanding the variables that contribute to this diagnosis and its severity is critical. An overlap between factors that may predispose people to become obese and those that may increase the risk of alcohol dependence may exist. However, data in the literature are not conclusive. Therefore, this study aimed to identify the association between alcohol dependence and obesity-related factors, including biochemical and genetic factors...
December 1, 2016: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/27904820/the-neurobiology-of-the-prader-willi-phenotype-of-fragile-x-syndrome
#6
REVIEW
Zukhrofi Muzar, Reymundo Lozano, Alexander Kolevzon, Randi J Hagerman
Fragile X syndrome (FXS) is the most common inherited cause of intellectual disability and autism, caused by a CGG expansion to greater than 200 repeats in the promoter region of FMR1 on the bottom of the X chromosome. A subgroup of individuals with FXS experience hyperphagia, lack of satiation after meals and severe obesity, this subgroup is referred to have the Prader-Willi phenotype of FXS. Prader-Willi syndrome is one of the most common genetic severe obesity disorders known and it is caused by the lack of the paternal 15q11-13 region...
November 2016: Intractable & Rare Diseases Research
https://www.readbyqxmd.com/read/27902747/joint-profiling-of-mirnas-and-mrnas-reveals-mirna-mediated-gene-regulation-in-the-g%C3%A3-ttingen-minipig-obesity-model
#7
Caroline M Junker Mentzel, Ferhat Alkan, Helle Keinicke, Mette J Jacobsen, Jan Gorodkin, Merete Fredholm, Susanna Cirera
Obesity and its comorbidities are an increasing challenge for both affected individuals and health care systems, worldwide. In obese individuals, perturbation of expression of both protein-coding genes and microRNAs (miRNA) are seen in obesity-relevant tissues (i.e. adipose tissue, liver and skeletal muscle). miRNAs are small non-coding RNA molecules which have important regulatory roles in a wide range of biological processes, including obesity. Rodents are widely used animal models for human diseases including obesity...
2016: PloS One
https://www.readbyqxmd.com/read/27899484/lack-of-cul4b-in-adipocytes-promotes-ppar%C3%AE-mediated-adipose-tissue-expansion-and-insulin-sensitivity
#8
Peishan Li, Yu Song, Wenying Zan, Liping Qin, Shuang Han, Baichun Jiang, Hao Dou, Changshun Shao, Yaoqin Gong
Obesity and obesity-associated diseases are linked to dysregulation of peroxisome proliferator-activated receptor γ (PPARγ) signaling pathway. Identification of the factors that regulate PPARγ expression and activity is crucial for combating obesity. However, the ubiquitin E3 ligases that target PPARγ for proteasomal degradation have been rarely identified and their functions in vivo have not been characterized. Here we report that CUL4B-RING E3 ligase (CRL4B) negatively regulates PPARγ by promoting its polyubiquitination and proteasomal degradation...
November 29, 2016: Diabetes
https://www.readbyqxmd.com/read/27897400/lipid-modulation-of-skeletal-muscle-mass-and-function
#9
REVIEW
Christopher Lipina, Harinder S Hundal
Loss of skeletal muscle mass is a characteristic feature of various pathologies including cancer, diabetes, and obesity, as well as being a general feature of ageing. However, the processes underlying its pathogenesis are not fully understood and may involve multiple factors. Importantly, there is growing evidence which supports a role for fatty acids and their derived lipid intermediates in the regulation of skeletal muscle mass and function. In this review, we discuss evidence pertaining to those pathways which are involved in the reduction, increase and/or preservation of skeletal muscle mass by such lipids under various pathological conditions, and highlight studies investigating how these processes may be influenced by dietary supplementation as well as genetic and/or pharmacological intervention...
October 8, 2016: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/27895820/sleep-circadian-dysrhythmia-obesity-and-diabetes
#10
REVIEW
Gumpeny Ramachandra Sridhar, Narasimhadevara Santhi Nirmala Sanjana
Synchrony of biological processes with environmental cues developed over millennia to match growth, reproduction and senescence. This entails a complex interplay of genetic, metabolic, chemical, light, hormonal and hedonistic factors across life forms. Sleep is one of the most prominent rhythms where such a match is established. Over the past 100 years or so, it has been possible to disturb the synchrony between sleep-wake cycle and environmental cues. Development of electric lights, shift work and continual accessibility of the internet has disrupted this match...
November 15, 2016: World Journal of Diabetes
https://www.readbyqxmd.com/read/27895808/mendelian-inheritance-of-trimodal-cpg-methylation-sites-suggests-distal-cis-acting-genetic-effects
#11
Shaza B Zaghlool, Mashael Al-Shafai, Wadha A Al Muftah, Pankaj Kumar, Christian Gieger, Melanie Waldenberger, Mario Falchi, Karsten Suhre
BACKGROUND: Environmentally influenced phenotypes, such as obesity and insulin resistance, can be transmitted over multiple generations. Epigenetic modifications, such as methylation of DNA cytosine-guanine (CpG) pairs, may be carriers of inherited information. At the population level, the methylation state of such "heritable" CpG sites is expected to follow a trimodal distribution, and their mode of inheritance should be Mendelian. METHODS: Using the Illumina Infinium 450 K DNA methylation array, we determined DNA CpG-methylation in blood cells from a family cohort 123 individuals of Arab ethnicity, including 18 elementary father-mother-child trios, we asked whether Mendelian inheritance of CpG methylation is observed, and most importantly, whether it is independent of any genetic signals...
2016: Clinical Epigenetics
https://www.readbyqxmd.com/read/27894254/divergent-selection-induced-obesity-alters-the-composition-and-functional-pathways-of-chicken-gut-microbiota
#12
Jinmei Ding, Lele Zhao, Lifeng Wang, Wenjing Zhao, Zhengxiao Zhai, Li Leng, Yuxiang Wang, Chuan He, Yan Zhang, Heping Zhang, Hui Li, He Meng
BACKGROUND: The gastrointestinal tract is populated by a complex and vast microbial network, with a composition that reflects the relationships of the symbiosis, co-metabolism, and co-evolution of these microorganisms with their host. The mechanism that underlies such interactions between the genetics of the host and gut microbiota remains elusive. RESULTS: To understand how genetic variation of the host shapes the gut microbiota and interacts with it to affect the metabolic phenotype of the host, we compared the abundance of microbial taxa and their functional performance between two lines of chickens (fat and lean) that had undergone long-term divergent selection for abdominal fat pad weight, which resulted in a 4...
November 28, 2016: Genetics, Selection, Evolution: GSE
https://www.readbyqxmd.com/read/27894106/prader-willi-syndrome-due-to-an-unbalanced-de-novo-translocation-t-15-19-q12-p13-3
#13
Vy Dang, Abhilasha Surampalli, Ann M Manzardo, Stephanie Youn, Merlin G Butler, June-Anne Gold, Virginia E Kimonis
Prader-Willi syndrome (PWS) is a complex, multisystem genetic disorder characterized by endocrine, neurologic, and behavioral abnormalities. We report the first case of an unbalanced de novo reciprocal translocation of chromosomes 15 and 19, 45,XY,-15,der(19)t(15;19)(q12;p13.3), resulting in monosomy for the PWS critical chromosome region. Our patient had several typical features of PWS including infantile hypotonia, a poor suck and feeding difficulties, tantrums, skin picking, compulsions, small hands and feet, and food seeking, but not hypopigmentation, a micropenis, cryptorchidism or obesity as common findings seen in PWS at the time of examination at 6 years of age...
November 29, 2016: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/27894066/obesity-associated-extracellular-mtdna-activates-central-tgf%C3%AE-pathway-to-cause-blood-pressure-increase
#14
Alberto Ale, Yalin Zhang, Cheng Han, Dongsheng Cai
Hypothalamic inflammation was recently found to mediate obesity-related hypertension, but the responsible upstream mediators remain unexplored. In this study, we show that dietary obesity is associated with extracellular release of mitochondrial DNA (mtDNA) into the cerebrospinal fluid, and that central delivery of mtDNA mimics TGFβ excess to activate downstream signaling pathways. Physiological study reveals that central administration of mtDNA or TGFβ are both sufficient to cause hypertension in mice. Knockout of the TGFβ receptor in pro-opiomelanocortin neurons counteracts the hypertensive effect of not only TGFβ but mtDNA excess, while the hypertensive action of central mtDNA can be blocked pharmacologically by a TGFβ receptor antagonist or genetically by TGFβ receptor knockout...
November 15, 2016: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27892926/dual-specificity-phosphatase-6-deficiency-regulates-gut-microbiome-and-transcriptome-response-against-diet-induced-obesity-in-mice
#15
Jhen-Wei Ruan, Sarah Statt, Chih-Ting Huang, Yi-Ting Tsai, Cheng-Chin Kuo, Hong-Lin Chan, Yu-Chieh Liao, Tse-Hua Tan, Cheng-Yuan Kao
The gut microbiota plays profound roles in host metabolism and the inflammatory response associated with the development of obesity. Dusp6-deficient mice have been shown to be resistant to diet-induced obesity, but the mechanism behind this remains unclear. 16S ribosomal RNA gene analysis demonstrated that dusp6-deficient mice harbour unique gut microbiota with resistance to diet-induced-obesity-mediated alteration of the gut microbiome. Using a germ-free mouse model, we found that faecal/gut microbiota derived from dusp6-deficient mice significantly increased energy expenditure and reduced weight gain in recipient wild-type mice fed on a high-fat diet...
November 28, 2016: Nature Microbiology
https://www.readbyqxmd.com/read/27891830/a-randomized-trial-examining-the-impact-of-communicating-genetic-and-lifestyle-risks-for-obesity
#16
Catharine Wang, Erynn S Gordon, Tricia Norkunas, Lisa Wawak, Ching-Ti Liu, Michael Winter, Rachel S Kasper, Michael F Christman, Robert C Green, Deborah J Bowen
OBJECTIVE: Genetic testing for obesity is available directly to consumers, yet little is understood about its behavioral impact and its added value to nongenetic risk communication efforts based on lifestyle factors. METHODS: A randomized trial examined the short-term impact of providing personalized obesity risk information, using a 2 × 2 factorial design. Participants were recruited from the Coriell Personalized Medicine Collaborative (CPMC) and randomized to receive (1) no risk information (control), (2) genetic risk, (3) lifestyle risk, or (4) combined genetic/lifestyle risks...
December 2016: Obesity
https://www.readbyqxmd.com/read/27889388/cellular-aging-contributes-to-failure-of-cold-induced-beige-adipocyte-formation-in-old-mice-and-humans
#17
Daniel C Berry, Yuwei Jiang, Robert W Arpke, Elizabeth L Close, Aki Uchida, David Reading, Eric D Berglund, Michael Kyba, Jonathan M Graff
Cold temperatures induce progenitor cells within white adipose tissue to form beige adipocytes that burn energy and generate heat; this is a potential anti-diabesity therapy. However, the potential to form cold-induced beige adipocytes declines with age. This creates a clinical roadblock to potential therapeutic use in older individuals, who constitute a large percentage of the obesity epidemic. Here we show that aging murine and human beige progenitor cells display a cellular aging, senescence-like phenotype that accounts for their age-dependent failure...
November 21, 2016: Cell Metabolism
https://www.readbyqxmd.com/read/27886642/obesity-and-the-breast-cancer-methylome
#18
REVIEW
William B Coleman
Breast cancer is associated with risk factors such as advancing age and obesity. However, the linkages between these risk factors for breast cancer development and initiation of the disease are not yet clear. Obesity may drive breast cancer development through increases in circulating estrogens in postmenopausal women. Mammary cell susceptibility to neoplastic transformation requires both genetic and epigenetic alterations, including changes in DNA methylation. Obesity is also subject to epigenetic regulation...
November 22, 2016: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/27885961/insig2-polymorphism-and-weight-gain-dyslipidemia-and-serum-adiponectin-in-finnish-patients-with-schizophrenia-treated-with-clozapine
#19
Suvi Koskinen, Olli Kampman, Anssi Solismaa, Leo-Pekka Lyytikäinen, Niko Seppälä, Merja Viikki, Mari Hämäläinen, Eeva Moilanen, Nina Mononen, Terho Lehtimäki, Esa Leinonen
AIM: To investigate INSIG2's association with obesity, weight change and serum lipid profile during clozapine treatment. MATERIALS & METHODS: Subjects with schizophrenia (n = 190) were genotyped, identifying seven SNPs. Genetic risk scores (GRSs) were calculated to adiponectin, high-density lipoprotein cholesterol, triglycerides and weight gain. RESULTS: In the model for weight gain, SNPs rs12151787, rs17047733 and rs10490626 were selected...
November 25, 2016: Pharmacogenomics
https://www.readbyqxmd.com/read/27885704/effects-of-genetic-variations-in-the-genes-encoding-nod1-and-nod2-on-type-2-diabetes-mellitus-and-insulin-resistance
#20
C Ozbayer, H Kurt, M N Kebapci, H V Gunes, E Colak, I Degirmenci
WHAT IS KNOWN AND OBJECTIVE: Nucleotide-binding oligomerization domain (NOD) 1 and NOD 2 are members of the NOD-like receptor (NLR) family and contain a caspase recruitment domain. NLRs are located in the cytosol, bind bacterial and viral ligands and play a key role in the realization of innate and adaptive immune response, inflammation, apoptosis and reactive oxygen species generation. Insulin resistance (IR) is a leading cause of type 2 diabetes mellitus (T2DM) and associated with obesity, inflammation and pro-inflammatory responses...
November 25, 2016: Journal of Clinical Pharmacy and Therapeutics
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