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Obesity methylation

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https://www.readbyqxmd.com/read/28324454/reward-circuitry-in-addiction
#1
REVIEW
Sarah Cooper, A J Robison, Michelle S Mazei-Robison
Understanding the brain circuitry that underlies reward is critical to improve treatment for many common health issues, including obesity, depression, and addiction. Here we focus on insights into the organization and function of reward circuitry and its synaptic and structural adaptations in response to cocaine exposure. While the importance of certain circuits, such as the mesocorticolimbic dopamine pathway, are well established in drug reward, recent studies using genetics-based tools have revealed functional changes throughout the reward circuitry that contribute to different facets of addiction, such as relapse and craving...
March 21, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/28324172/enzymes-involved-in-branched-chain-amino-acid-metabolism-in-humans
#2
REVIEW
María M Adeva-Andany, Laura López-Maside, Cristóbal Donapetry-García, Carlos Fernández-Fernández, Cristina Sixto-Leal
Branched-chain amino acids (leucine, isoleucine and valine) are structurally related to branched-chain fatty acids. Leucine is 2-amino-4-methyl-pentanoic acid, isoleucine is 2-amino-3-methyl-pentanoic acid, and valine is 2-amino-3-methyl-butanoic acid. Similar to fatty acid oxidation, leucine and isoleucine produce acetyl-coA. Additionally, leucine generates acetoacetate and isoleucine yields propionyl-coA. Valine oxidation produces propionyl-coA, which is converted into methylmalonyl-coA and succinyl-coA. Branched-chain aminotransferase catalyzes the first reaction in the catabolic pathway of branched-chain amino acids, a reversible transamination that converts branched-chain amino acids into branched-chain ketoacids...
March 21, 2017: Amino Acids
https://www.readbyqxmd.com/read/28304288/changes-in-synaptic-plasticity-and-glutamate-receptors-in-type-2-diabetic-kk-ay-mice
#3
Huajing Yin, Weiping Wang, Wenwen Yu, Jiang Li, Nan Feng, Ling Wang, Xiaoliang Wang
In the present study, the progressive alteration of cognition and the mechanisms of reduction in long-term potentiation (LTP) in spontaneous obese KK-Ay type 2 diabetic mice were investigated. In the study, 3-, 5-, and 7-month-old KK-Ay mice were used. The results indicated that KK-Ay mice showed cognitive deficits in the Morris water maze test beginning at the age of 3 months. LTP was significantly impaired in KK-Ay mice during whole study period (3 to 7 months). The above deficits were reversible at an early stage (3 to 5 months old) by diet intervention...
March 18, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28297716/rna-m-6-a-methylation-regulates-the-ultraviolet-induced-dna-damage-response
#4
Yang Xiang, Benoit Laurent, Chih-Hung Hsu, Sigrid Nachtergaele, Zhike Lu, Wanqiang Sheng, Chuanyun Xu, Hao Chen, Jian Ouyang, Siqing Wang, Dominic Ling, Pang-Hung Hsu, Lee Zou, Ashwini Jambhekar, Chuan He, Yang Shi
Cell proliferation and survival require the faithful maintenance and propagation of genetic information, which are threatened by the ubiquitous sources of DNA damage present intracellularly and in the external environment. A system of DNA repair, called the DNA damage response, detects and repairs damaged DNA and prevents cell division until the repair is complete. Here we report that methylation at the 6 position of adenosine (m(6)A) in RNA is rapidly (within 2 min) and transiently induced at DNA damage sites in response to ultraviolet irradiation...
March 15, 2017: Nature
https://www.readbyqxmd.com/read/28296064/box-c-d-small-nucleolar-rna-genes-and-the-prader-willi-syndrome-a-complex-interplay
#5
REVIEW
Jérôme Cavaillé
The nucleolus of mammalian cells contains hundreds of box C/D small nucleolar RNAs (SNORDs). Through their ability to base pair with ribosomal RNA precursors, most play important roles in the synthesis and/or activity of ribosomes, either by guiding sequence-specific 2'-O-methylations or by facilitating RNA folding and cleavages. A growing number of SNORD genes with elusive functions have been discovered recently. Intriguingly, the vast majority of them are located in two large, imprinted gene clusters at human chromosome region 15q11q13 (the SNURF-SNRPN domain) and at 14q32 (the DLK1-DIO3 domain) where they are expressed, respectively, only from the paternally and maternally inherited alleles...
March 13, 2017: Wiley Interdisciplinary Reviews. RNA
https://www.readbyqxmd.com/read/28290302/the-modulatory-effect-of-epigallocatechin-3-o-3-o-methyl-gallate-egcg3%C3%A2-me-on-intestinal-microbiota-of-high-fat-diet-induced-obesity-mice-model
#6
Mei Cheng, Xin Zhang, Yingjie Miao, Jinxuan Cao, Zufang Wu, Peifang Weng
(-)-Epigallocatechin 3-O-(3-O-methyl) gallate (EGCG3″Me) has exhibited multiple beneficial effects on the prevention of obesity in oolong tea. However, its absorption is relatively low, and the potential to be fully utilized is not completely elucidated. Therefore, with human flora-associated (HFA) mice model, the effect of EGCG3″Me on high fat diet-induced obesity was investigated by high-throughput sequencing. The shifts in relative abundance of the dominant taxa at the phylum, family and genus levels showed the dramatically effects of EGCG3″Me...
February 2017: Food Research International
https://www.readbyqxmd.com/read/28289477/obesity-accelerates-epigenetic-aging-in-middle-aged-but-not-in-elderly-individuals
#7
Tapio Nevalainen, Laura Kananen, Saara Marttila, Juulia Jylhävä, Nina Mononen, Mika Kähönen, Olli T Raitakari, Antti Hervonen, Marja Jylhä, Terho Lehtimäki, Mikko Hurme
BACKGROUND: Human aging is associated with profound changes in one of the major epigenetic mechanisms, DNA methylation. Some of these changes occur in a clock-like fashion, i.e., correlating with the calendar age of an individual, thus providing a new aging biomarker. Some reports have identified factors associated with the acceleration of the epigenetic age. However, it is also important to analyze the temporal changes in the epigenetic age, i.e., the duration of the observed acceleration, and the effects of the possible therapeutic and lifestyle modifications...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28277986/bardoxolone-methyl-inhibits-migration-and-metabolism-in-mcf7-cells
#8
Alaa Refaat, Chathyan Pararasa, Muhammed Arif, James E P Brown, Amtul Carmichael, Sameh S Ali, Hiroaki Sakurai, Helen R Griffiths
Bardoxolone-methyl (BAR) is reported to have anti-inflammatory, anti-proliferative and anti-fibrotic effects. BAR activates Nrf2 and may ameliorate oxidative stress through induction of antioxidant genes. However, off-target effects, probably concentration and NFkB-dependent, have limited the clinical use of BAR. Nrf2 regulates expression of antioxidant and mitochondrial genes and has been proposed as a target for both obesity and breast cancer. Therefore, we explored whether BAR can alter migration and proliferation in the MCF7 cell line and whether metabolic function is affected by BAR...
February 2017: Free Radical Research
https://www.readbyqxmd.com/read/28277977/human-liver-epigenetic-alterations-in-non-alcoholic-steatohepatitis-are-related-to-insulin-action
#9
Vanessa D de Mello, Ashok Matte, Alexander Perfilyev, Ville Männistö, Tina Rönn, Emma Nilsson, Pirjo Käkelä, Charlotte Ling, Jussi Pihlajamäki
Both genetic and lifestyle factors contribute to the risk of non-alcoholic steatohepatitis (NASH). Additionally, epigenetic modifications may also play a key role in the pathogenesis of NASH. We therefore investigated liver DNA methylation, as a marker for epigenetic alterations, in individuals with simple steatosis and NASH, and further tested if these alterations were associated with clinical phenotypes. Liver biopsies obtained from 95 obese individuals (age: 49.5±7.7 years, BMI: 43±5.7 kg/m(2), type 2 diabetes [T2D]: 35) as a wedge biopsy during a Roux-en-Y gastric bypass operation were investigated...
February 23, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/28276790/new-onset-diabetes-mellitus-induced-by-statins-current-evidence
#10
Steven G Chrysant
The hydroxyl-methyl-glutaryl-coenzyme-A (HMG-CoA) reductase inhibitors of statin action are very effective and safe drugs, and they are widely used for the treatment of hyperlipidemia and the prevention of primary and secondary cardiovascular diseases (CVDs). However, recent meta-analyses of previous studies done with statins have shown that these drugs could induce new onset diabetes mellitus (NODM), especially in subjects prone to diabetes: obese, females, older age, Asian descent, and those with pre-diabetes or the metabolic syndrome...
February 24, 2017: Postgraduate Medicine
https://www.readbyqxmd.com/read/28272885/lead-development-of-thiazolylsulfonamides-with-carbonic-anhydrase-inhibitory-action
#11
Fabrizio Carta, Alexander Birkmann, Tamara Pfaff, Helmut Buschmann, Wilfried Schwab, Holger Zimmermann, Alfonso Maresca, Claudiu T Supuran
A series of congeners structurally related to pritelivir, N-[5-(aminosulfonyl)-4-methyl-1,3-thiazol-2-yl]-N-methyl-2-[4-(2-pyridinyl)phenyl]acetamide, a helicase-primase inhibitor for the treatment of herpes simplex virus infections, was prepared. The synthesized primary and secondary sulfonamides were investigated as inhibitors of six physiologically and pharmacologically relevant human (h) carbonic anhydrase (hCA, EC 4.2.1.1) isoforms, the cytosolic enzymes hCA I and II, the mitochondrial ones hCA VA and VB, and the transmembrane, tumor associated hCA IX and XII...
March 17, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28270441/insulin-sensitizer-prevents-and-ameliorates-experimental-type-1-diabetes
#12
Michael Valitsky, Amnon Hoffman, Terry Unterman, Jacob Bar-Tana
Insulin-dependent type-1 diabetes (T1D) is driven by autoimmune beta-cell failure, whereas systemic resistance to insulin is considered the hallmark of insulin-independent type-2 diabetes (T2D). In contrast to this canonical dichotomy, insulin resistance appears to precede the overt diabetic stage of T1D and to predict its progression, implying that insulin sensitizers may change the course of T1D. However, previous attempts to ameliorate T1D in animal models or patients by insulin sensitizers have largely failed...
March 7, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28266632/specific-cpg-hyper-methylation-leads-to-ankrd26-gene-down-regulation-in-white-adipose-tissue-of-a-mouse-model-of-diet-induced-obesity
#13
Gregory A Raciti, Rosa Spinelli, Antonella Desiderio, Michele Longo, Luca Parrillo, Cecilia Nigro, Vittoria D'Esposito, Paola Mirra, Francesca Fiory, Vincenzo Pilone, Pietro Forestieri, Pietro Formisano, Ira Pastan, Claudia Miele, Francesco Beguinot
Epigenetic modifications alter transcriptional activity and contribute to the effects of environment on the individual risk of obesity and Type 2 Diabetes (T2D). Here, we have estimated the in vivo effect of a fat-enriched diet (HFD) on the expression and the epigenetic regulation of the Ankyrin repeat domain 26 (Ankrd26) gene, which is associated with the onset of these disorders. In visceral adipose tissue (VAT), HFD exposure determined a specific hyper-methylation of Ankrd26 promoter at the -436 and -431 bp CpG sites (CpGs) and impaired its expression...
March 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28266014/snord116-deletions-cause-prader-willi-syndrome-with-a-mild-phenotype-and-macrocephaly
#14
Paolo Fontana, Marina Grasso, Fabio Acquaviva, Elena Gennaro, Maria Laura Galli, Mariateresa Falco, Francesca Scarano, Gioacchino Scarano, Fortunato Lonardo
Prader-Willi syndrome is a complex condition caused by lack of expression of imprinted genes in the paternally derived region of chromosome 15 (15q11q13). A small number of patients with Prader-Willi phenotype have been discovered to have narrow deletions, not encompassing the whole critical region, but only the SNORD116 cluster, which includes genes codifying for small nucleolar RNAs. This kind of deletion usually is not detected by the classic DNA methylation analysis test. We present the case of a male patient with a mild Prader-Willi phenotype and a small deletion including SNORD116, diagnosed by methylation-sensitive MLPA...
March 7, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28264723/developmental-pathways-to-adiposity-begin-before-birth-and-are-influenced-by-genotype-prenatal-environment-and-epigenome
#15
Xinyi Lin, Ives Yubin Lim, Yonghui Wu, Ai Ling Teh, Li Chen, Izzuddin M Aris, Shu E Soh, Mya Thway Tint, Julia L MacIsaac, Alexander M Morin, Fabian Yap, Kok Hian Tan, Seang Mei Saw, Michael S Kobor, Michael J Meaney, Keith M Godfrey, Yap Seng Chong, Joanna D Holbrook, Yung Seng Lee, Peter D Gluckman, Neerja Karnani
BACKGROUND: Obesity is an escalating health problem worldwide, and hence the causes underlying its development are of primary importance to public health. There is growing evidence that suboptimal intrauterine environment can perturb the metabolic programing of the growing fetus, thereby increasing the risk of developing obesity in later life. However, the link between early exposures in the womb, genetic susceptibility, and perturbed epigenome on metabolic health is not well understood...
March 7, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28264494/omalizumab-is-equally-effective-in-persistent-allergic-oral-corticosteroid-dependent-asthma-caused-by-either-seasonal-or-perennial-allergens-a-pilot-study
#16
Christian Domingo, Xavier Pomares, Albert Navarro, Núria Rudi, Ana Sogo, Ignacio Dávila, Rosa M Mirapeix
Omalizumab is marketed for chronic severe asthma patients who are allergic to perennial allergens. Our purpose was to investigate whether omalizumab is also effective in persistent severe asthma due to seasonal allergens. Thirty patients with oral corticosteroid-dependent asthma were treated with Omalizumab according to the dosing table. For each patient with asthma due to seasonal allergens, we recruited the next two consecutive patients with asthma due to perennial allergens. The dose of oral methyl prednisolone was tapered at a rate of 2 mg every two weeks after the start of treatment with omalizumab depending on tolerance...
February 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28257978/purple-corn-silk-a-potential-anti-obesity-agent-with-inhibition-on-adipogenesis-and-induction-on-lipolysis-and-apoptosis-in-adipocytes
#17
Rungsiri Chaiittianan, Khaetthareeya Sutthanut, Ariya Rattanathongkom
ETHNOPHARMACOLOGICAL RELEVANCE: Corn silk or the stigma of Zea mays L. has traditionally been used in weight loss stimulation and treatment of cystitis, urinary infections and obesity. Purple corn silk, rich of polyphenolic substances, was reported on anti-diabetic and anti-obesity effect in animal studies. However, scientific evidence on mechanisms and targets of action of purple corn silk related to adipocyte life cycle has been limited. AIM OF STUDY: To determine phytochemical compositions and investigate anti-obesity potential of the purple corn silk focusing on interruption of adipocyte life cycle; effect on pre-adipocyte proliferation, adipogenesis, adipocyte lipolysis, and apoptosis...
February 28, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28256005/regulatory-role-of-n-6-methyladenosine-m-6-a-methylation-in-rna-processing-and-human-diseases
#18
Wenqiang Wei, Xinying Ji, Xiangqian Guo, Shaoping Ji
N(6) -methyladenosine (m(6) A) modification is an abundant and conservative RNA modification in bacterial and eukaryotic cells. m(6) A modification mainly occurs in the 3' untranslated regions (UTRs) and near the stop codons of mRNA. Diverse strategies have been developed for identifying m(6) A sites in single nucleotide resolution. Dynamic regulation of m(6) A is found in metabolism, embryogenesis and developmental processes, indicating a possible epigenetic regulation role along RNA processing and exerting biological functions...
March 3, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28250848/tissue-specific-methylation-profile-in-obese-patients-with-type-2-diabetes-before-and-after-roux-en-y-gastric-bypass
#19
REVIEW
Priscila Sala, Raquel Susana Matos de Miranda Torrinhas, Danielle Cristina Fonseca, Graziela Rosa Ravacci, Dan Linetzky Waitzberg, Daniel Giannella-Neto
Eating habits, lifestyles, and exposure to specific environmental factors can greatly impact the risk of developing type 2 diabetes (T2D), influence the genome epigenetically, and affect the expression of genes, including genes related to glycemic control, at any stage of life. The epigenetic mechanism underlying obesity and T2D pathogenesis remains poorly understood. Conventional strategies for the treatment of obesity and its comorbidities often have poor long-term adherence, and pharmacological interventions are limited...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28250350/aglaiabbrevins-a-d-new-prenylated-bibenzyls-from-the-leaves-of-aglaia-abbreviata-with-potent-ptp1b-inhibitory-activity
#20
Pan Sun, Chang-Sheng Jiang, Yi Zhang, Ai-Hong Liu, Tong-Jun Liang, Jia Li, Yue-Wei Guo, Jian-Mei Jiang, Shui-Chun Mao, Bin Wang
Four new prenylated bibenzyls, named aglaiabbrevins A-D (2, 4-6), were isolated from the leaves of Aglaia abbreviata, along with two known related analogues, 3,5-dihydroxy-2-[3,7-dimethyl-2(E),6-octadienyl]bibenzyl (7) and 3,5-dihydroxy-2-(3-methyl-2-butenyl)bibenzyl (8). The structures of the new compounds were elucidated on the basis of extensive spectroscopic experiments, mainly one and two dimensional (1D- and 2D)-NMR, and the absolute configuration of 5 was determined by the measurement of specific rotation...
2017: Chemical & Pharmaceutical Bulletin
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