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Epigenetics diabetes

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https://www.readbyqxmd.com/read/29154162/epigenetic-reprogramming-in-metabolic-disorders-nutritional-factors-and-beyond
#1
REVIEW
Zhiyong Cheng, Louise Zheng, Fabio A Almeida
Environmental factors (e.g., malnutrition and physical inactivity) contribute largely to metabolic disorders including obesity, type 2 diabetes, cardiometabolic disease and nonalcoholic fatty liver diseases. The abnormalities in metabolic activity and pathways have been increasingly associated with altered DNA methylation, histone modification and noncoding RNAs, whereas lifestyle interventions targeting diet and physical activity can reverse the epigenetic and metabolic changes. Here we review recent evidence primarily from human studies that links DNA methylation reprogramming to metabolic derangements or improvements, with a focus on cross-tissue (e...
October 23, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29153750/family-history-of-diabetes-is-associated-with-enhanced-adipose-lipolysis-evidence-for-the-implication-of-epigenetic-factors
#2
I Dahlman, M Ryden, P Arner
AIMS: Type 2 diabetes is associated with insulin resistance, adipose hypertrophy and increased lipolysis. The heritability of these traits has been determined by associating them with a family history of diabetes. METHODS: Abdominal subcutaneous fat biopsies were obtained from 581 subjects in a cross-sectional study. Fat cells were isolated, and the difference between measured and expected fat-cell volume was used to determine adipose morphology (degree of hypertrophy or hyperplasia)...
November 11, 2017: Diabetes & Metabolism
https://www.readbyqxmd.com/read/29149222/personalized-medicine-and-hispanic-health-improving-health-outcomes-and-reducing-health-disparities-a-national-heart-lung-and-blood-institute-workshop-report
#3
M Larissa Avilés-Santa, John Heintzman, Nangel M Lindberg, Rafael Guerrero-Preston, Kenneth Ramos, Ana L Abraído-Lanza, Jonca Bull, Adolph Falcón, Mary Ann McBurnie, Ernest Moy, George Papanicolaou, Ileana L Piña, Jennifer Popovic, Shakira F Suglia, Miguel A Vázquez
Persons of Hispanic/Latino descent may represent different ancestries, ethnic and cultural groups and countries of birth. In the U.S., the Hispanic/Latino population is projected to constitute 29% of the population by 2060. A personalized approach focusing on individual variability in genetics, environment, lifestyle and socioeconomic determinants of health may advance the understanding of some of the major factors contributing to the health disparities experienced by Hispanics/Latinos and other groups in the U...
2017: BMC Proceedings
https://www.readbyqxmd.com/read/29143608/physical-activity-in-the-prevention-of-human-diseases-role-of-epigenetic-modifications
#4
REVIEW
Elisa Grazioli, Ivan Dimauro, Neri Mercatelli, Guan Wang, Yannis Pitsiladis, Luigi Di Luigi, Daniela Caporossi
Epigenetic modification refers to heritable changes in gene function that cannot be explained by alterations in the DNA sequence. The current literature clearly demonstrates that the epigenetic response is highly dynamic and influenced by different biological and environmental factors such as aging, nutrient availability and physical exercise. As such, it is well accepted that physical activity and exercise can modulate gene expression through epigenetic alternations although the type and duration of exercise eliciting specific epigenetic effects that can result in health benefits and prevent chronic diseases remains to be determined...
November 14, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29135487/update-on-endocrine-aspects-of-childhood-obesity
#5
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/29135286/vitamin-b12-supplementation-influences-methylation-of-genes-associated-with-type-2-diabetes-and-its-intermediate-traits
#6
Dilip K Yadav, Smeeta Shrestha, Karen A Lillycrop, Charu V Joglekar, Hong Pan, Joanna D Holbrook, Caroline Hd Fall, Chittaranjan S Yajnik, Giriraj R Chandak
AIM: To investigate the effect of B12 and/or folic acid supplementation on genome-wide DNA methylation. METHODS: We performed Infinium HumanMethylation450 BeadChip (Zymo Research, CA, USA) assay in children supplemented with B12 and/or folic acid (n = 12 in each group) and investigated the functional mechanism of selected differentially methylated loci. RESULTS: We noted significant methylation changes postsupplementation in B12 (589 differentially methylated CpGs and 2892 regions) and B12 + folic acid (169 differentially methylated CpGs and 3241 regions) groups...
November 14, 2017: Epigenomics
https://www.readbyqxmd.com/read/29132743/nuclear-sirtuins-and-inflammatory-signaling-pathways
#7
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/29128937/epigenetics-in-diabetic-nephropathy-immunity-and-metabolism
#8
REVIEW
Samuel T Keating, Janna A van Diepen, Niels P Riksen, Assam El-Osta
When it comes to the epigenome, there is a fine line between clarity and confusion-walk that line and you will discover another fascinating level of transcription control. With the genetic code representing the cornerstone of rules for information that is encoded to proteins somewhere above the genome level there is a set of rules by which chemical information is also read. These epigenetic modifications show a different side of the genetic code that is diverse and regulated, hence modifying genetic transcription transiently, ranging from short- to long-term alterations...
November 11, 2017: Diabetologia
https://www.readbyqxmd.com/read/29128366/vaccarin-protects-human-microvascular-endothelial-cells-from-apoptosis-via-attenuation-of-hdac1-and-oxidative-stress
#9
Xuexue Zhu, Yueyue Lei, Fanggen Tan, Leilei Gong, Haifeng Gong, Wei Yang, Ting Chen, Zhixuan Zhang, Weiwei Cai, Bao Hou, Xu Wang, Haijian Sun, Yuetao Zhou, Liying Qiu
Vaccarin (VAC), an active flavonoid glycoside from vaccariae semen, exhibits extensive biological activities including vascular endothelial cell protective effects. Histone deacetylase1 (HDAC1) is an epigenetic regulator in cellular apoptosis. In this study, we evaluated the protective effects of VAC on high glucose (HG)-induced cell apoptosis in human microvascular endothelial cells (HMEC-1). The levels of reactive oxygen species, activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) were measured...
November 8, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29118015/anril-regulates-production-of-extracellular-matrix-proteins-and-vasoactive-factors-in-diabetic-complications
#10
Anu Alice Thomas, Biao Feng, Subrata Chakrabarti
Long non-coding RNAs (lncRNAs) have gained widespread interest due to their prevailing presence in various diseases. lncRNA ANRIL (a.k.a CDKN2B-AS1) is located on human chromosome 9 (p21.3) and transcribed in opposite direction to INK4b-ARF-INK4a gene cluster. It has been identified as highly susceptible region for diseases such as coronary artery diseases and Type 2 Diabetes. Here we explored its regulatory role in diabetic nephropathy (DN) and diabetic cardiomyopathy (DCM) in association with epigenetic modifiers p300 and polycomb repressive complex 2 (PRC2) complex...
November 7, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29117997/metformin-an-anti-proliferative-agent-and-methylation-regulator-in-treating-prostatic-disease
#11
Zongwei Wang, Aria F Olumi
Existing drugs that have been used in clinical practice for other purposes can prove useful for reutilization, since much of the safety profile, pharmacokinetics have been completed. Therefore, the drugs can enter clinical practice for variety of causes with less regulatory burden. Metformin may prove to be such a drug where it may have a role in other diseases, beside management of diabetes. In this perspective, we provide our finding and understanding of metformin as an alternate way to treat urological abnormal proliferation...
November 8, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29110598/sirt1-as-a-therapeutic-target-in-diabetic-complications
#12
Justyna Strycharz, Żaneta Rygielska, Ewa Świderska, Józef Drzewoski, Janusz Szemraj, Leszek Szmigiero, Agnieszka Śliwińska
Background SIRT1 is an epigenetic enzyme involved in histone and non-histone protein deacetylation. It acts primarily as a metabolic sensor, which responses to changing energy status by deacetylating crucial transcription factors and cofactors. In this way, SIRT1 regulates mitochondrial function and biogenesis, oxidative stress, inflammation, apoptosis and cellular senescence. Disturbance of all of these phenomena promotes the pathogenesis of diabetic complications. These disorders are inseparably connected with chronic hyperglycemia, which possesses a strong epigenetic determinant...
November 6, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29104258/epigenetic-regulatory-mechanisms-induced-by-resveratrol
#13
REVIEW
Guilherme Felipe Santos Fernandes, Gabriel Dalio Bernardes Silva, Aline Renata Pavan, Diego Eidy Chiba, Chung Man Chin, Jean Leandro Dos Santos
Resveratrol (RVT) is one of the main natural compounds studied worldwide due to its potential therapeutic use in the treatment of many diseases, including cancer, diabetes, cardiovascular diseases, neurodegenerative diseases and metabolic disorders. Nevertheless, the mechanism of action of RVT in all of these conditions is not completely understood, as it can modify not only biochemical pathways but also epigenetic mechanisms. In this paper, we analyze the biological activities exhibited by RVT with a focus on the epigenetic mechanisms, especially those related to DNA methyltransferase (DNMT), histone deacetylase (HDAC) and lysine-specific demethylase-1 (LSD1)...
November 1, 2017: Nutrients
https://www.readbyqxmd.com/read/29101450/diet-in-pregnancy-more-than-food
#14
REVIEW
H Danielewicz, G Myszczyszyn, A Dębińska, A Myszkal, A Boznański, L Hirnle
High food quality, together with adequate macro- and micronutrient intake in pregnancy, is crucial for the health status of the mother and child. Recent findings suggest that it could also be beneficial or harmful in the context of the well-being of the whole future population. According to the developmental origins of health and disease hypothesis, most conditions that occur in adulthood originate in foetal life. Moreover, some epigenetic events, modified inter alia by diet, impact more than one generation...
November 3, 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/29101051/histone-methyltransferase-g9a-modulates-hepatic-insulin-signaling-via-regulating-hmga1
#15
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/29099273/dna-methylation-profiles-in-sibling-pairs-discordant-for-intrauterine-exposure-to-maternal-gestational-diabetes
#16
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/29091029/dnmt3a-is-an-epigenetic-mediator-of-adipose-insulin-resistance
#17
Dongjoo You, Emma Nilsson, Danielle E Tenen, Anna Lyubetskaya, James Lo, Rencong Jiang, Jasmine Deng, Brian A Dawes, Allan Vaag, Charlotte Ling, Evan D Rosen, Sona Kang
Insulin resistance results from an intricate interaction between genetic make-up and environment, and thus may be orchestrated by epigenetic mechanisms like DNA methylation. Here, we demonstrate that DNA methyltransferase 3a (Dnmt3a) is both necessary and sufficient to mediate insulin resistance in cultured mouse and human adipocytes. Furthermore, adipose-specific Dnmt3a knock-out mice are protected from diet-induced insulin resistance and glucose intolerance without accompanying changes in adiposity. Unbiased gene profiling studies revealed Fgf21 as a key negatively regulated Dnmt3a target gene in adipocytes with concordant changes in DNA methylation at the Fgf21 promoter region...
November 1, 2017: ELife
https://www.readbyqxmd.com/read/29082005/maternal-and-child-health-services-and-an-integrated-life-cycle-approach-to-the-prevention-of-non-communicable-diseases
#18
REVIEW
Luisa Brumana, Alvaro Arroyo, Nina R Schwalbe, Susanna Lehtimaki, David B Hipgrave
Described as the 'invisible epidemic', non-communicable diseases (NCDs) are the world's leading cause of death. Most are caused by preventable factors, including poor diet, tobacco use, harmful use of alcohol and physical inactivity. Diabetes, cancer and cardiovascular and chronic lung diseases were responsible for 38 million (68%) of global deaths in 2012. Since 1990, proportionate NCD mortality has increased substantially as populations have aged and communicable diseases decline. The majority of NCD deaths, especially premature NCD deaths (<70 years, 82%), occur in low-income and middle-income countries, and among poor communities within them...
2017: BMJ Global Health
https://www.readbyqxmd.com/read/29081381/inflammageing-and-metaflammation-the-yin-and-yang-of-type-2-diabetes
#19
REVIEW
Francesco Prattichizzo, Valeria De Nigris, Rosangela Spiga, Elettra Mancuso, Lucia La Sala, Roberto Antonicelli, Roberto Testa, Antonio Domenico Procopio, Fabiola Olivieri, Antonio Ceriello
Type 2 diabetes mellitus (T2DM) is characterised by chronic low-grade inflammation, recently referred to as 'metaflammation', a relevant factor contributing to the development of both diabetes and its complications. Nonetheless, 'canonical' anti-inflammatory drugs do not yield satisfactory results in terms of prevention of diabetes progression and of cardiovascular events, suggesting that the causal mechanisms fostering metaflammation deserve further research to identify new druggable targets. Metaflammation resembles ageing-induced low-grade inflammation, previously referred to as inflammageing, in terms of clinical presentation and the molecular profile, pointing to a common aetiology for both conditions...
October 31, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/29077742/dna-methylation-and-gene-expression-of-txnip-in-adult-offspring-of-women-with-diabetes-in-pregnancy
#20
Azadeh Houshmand-Oeregaard, Line Hjort, Louise Kelstrup, Ninna S Hansen, Christa Broholm, Linn Gillberg, Tine D Clausen, Elisabeth R Mathiesen, Peter Damm, Allan Vaag
BACKGROUND: Fetal exposure to maternal diabetes increases the risk of type 2 diabetes (T2DM), possibly mediated by epigenetic mechanisms. Low blood TXNIP DNA methylation has been associated with elevated glucose levels and risk of T2DM, and increased skeletal muscle TXNIP gene expression was reported in subjects with impaired glucose metabolism or T2DM. Subcutaneous adipose tissue (SAT) and skeletal muscle play a key role in the control of whole body glucose metabolism and insulin action...
2017: PloS One
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