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methylation diabetes

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https://www.readbyqxmd.com/read/29164275/dna-methylation-markers-associated-with-type-2-diabetes-fasting-glucose-and-hba1c-levels-a-systematic-review-and-replication-in-a-case-control-sample-of-the-lifelines-study
#1
Eliza Walaszczyk, Mirjam Luijten, Annemieke M W Spijkerman, Marc J Bonder, Helen L Lutgers, Harold Snieder, Bruce H R Wolffenbuttel, Jana V van Vliet-Ostaptchouk
AIMS/HYPOTHESIS: Epigenetic mechanisms may play an important role in the aetiology of type 2 diabetes. Recent epigenome-wide association studies (EWASs) identified several DNA methylation markers associated with type 2 diabetes, fasting glucose and HbA1c levels. Here we present a systematic review of these studies and attempt to replicate the CpG sites (CpGs) with the most significant associations from these EWASs in a case-control sample of the Lifelines study. METHODS: We performed a systematic literature search in PubMed and EMBASE for EWASs to test the association between DNA methylation and type 2 diabetes and/or glycaemic traits and reviewed the search results...
November 21, 2017: Diabetologia
https://www.readbyqxmd.com/read/29161229/sex-and-dose-specific-effects-of-maternal-bisphenol-a-exposure-on-pancreatic-islets-of-first-and-second-generation-adult-mice-offspring
#2
Amita Bansal, Cetewayo Rashid, Frances Xin, Changhong Li, Erzsebet Polyak, Anna Duemler, Tom van der Meer, Martha Stefaniak, Sana Wajid, Nicolai Doliba, Marisa S Bartolomei, Rebecca A Simmons
BACKGROUND: Exposure to the environmental endocrine disruptor bisphenol A (BPA) is ubiquitous and associated with the increased risk of diabetes and obesity. However, the underlying mechanisms remain unknown. We recently demonstrated that perinatal BPA exposure is associated with higher body fat, impaired glucose tolerance, and reduced insulin secretion in first- (F1) and second-generation (F2) C57BL/6J male mice offspring. OBJECTIVE: We sought to determine the multigenerational effects of maternal bisphenol A exposure on mouse pancreatic islets...
September 27, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/29159506/a-longitudinal-study-of-dna-methylation-as-a-potential-mediator-of-age-related-diabetes-risk
#3
Crystal D Grant, Nadereh Jafari, Lifang Hou, Yun Li, James D Stewart, Guosheng Zhang, Archana Lamichhane, JoAnn E Manson, Andrea A Baccarelli, Eric A Whitsel, Karen N Conneely
DNA methylation (DNAm) has been found to show robust and widespread age-related changes across the genome. DNAm profiles from whole blood can be used to predict human aging rates with great accuracy. We sought to test whether DNAm-based predictions of age are related to phenotypes associated with type 2 diabetes (T2D), with the goal of identifying risk factors potentially mediated by DNAm. Our participants were 43 women enrolled in the Women's Health Initiative. We obtained methylation data via the Illumina 450K Methylation array on whole blood samples from participants at three timepoints, covering on average 16 years per participant...
November 20, 2017: GeroScience
https://www.readbyqxmd.com/read/29158345/stable-oxidative-cytosine-modifications-accumulate-in-cardiac-mesenchymal-cells-from-type2-diabetes-patients-rescue-by-alpha-ketoglutarate-and-tet-tdg-functional-reactivation
#4
Francesco Spallotta, Chiara Cencioni, Sandra Atlante, Davide Garella, Mattia Cocco, Mattia Mori, Raffaella Mastrocola, Carsten Künne, Stefan Günther, Simona Nanni, Valerio Azzimato, Sven Zukunft, Angela Kornberger, Duran Sueruen, Frank Schnutgen, Harald von Melchner, Antonella Di Stilo, Manuela Aragno, Maarten Braspenning, Wim Van Criekinge, Miles J De Blasio, Rebecca H Ritchie, Germana Zaccagnini, Fabio Martelli, Antonella Farsetti, Ingrid Fleming, Thomas Braun, Andres Beiras-Fernandez, Bruno Botta, Massimo Collino, Massimo Bertinaria, Andreas M Zeiher, Carlo Gaetano
Rationale: Human cardiac mesenchymal cells (CMSCs) are a therapeutically-relevant primary cell population. Diabetes compromises CMSC function as consequence of metabolic alterations and incorporation of stable epigenetic changes. Objective: To investigate the role of α-ketoglutarate (αKG) in the epi-metabolic control of DNA demethylation in CMSCs. Methods and Results: Quantitative global analysis, methylated and hydroxymethylated DNA sequencing and gene specific GC methylation detection revealed an accumulation of 5mC, 5hmC and 5fC in the genomic DNA of human CMSCs isolated from diabetic (D) donors (D-CMSCs)...
November 20, 2017: Circulation Research
https://www.readbyqxmd.com/read/29154162/epigenetic-reprogramming-in-metabolic-disorders-nutritional-factors-and-beyond
#5
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/29151239/increased-serum-3-carboxy-4-methyl-5-propyl-2-furanpropanoic-acid-cmpf-levels-are-associated-with-glucose-metabolism-in-chinese-pregnant-women
#6
J Yi, H Jin, R Zhang, S Zhang, P Chen, X Yu, X Zhang
PURPOSE: Previous studies have found that 3-carboxy-4-methyl-5-propyl-2-furanpropanoic acid (CMPF) was associated with diabetes. This study aimed to investigate the relationship between abnormal increased CMPF levels and gestational diabetes mellitus (GDM). METHODS: We recruited 828 pregnant women, and all of them underwent an oral glucose tolerance test (OGTT). We screened out 141 GDM patients and 230 pregnant women with normal glucose tolerance as controls. The serum CMPF concentration in participants was measured, and the relationship between the serum CMPF concentration and various parameters and biochemical indices was analyzed...
November 18, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29150981/systematic-proteomic-analysis-of-protein-methylation-in-prokaryotes-and-eukaryotes-revealed-distinct-substrate-specificity
#7
Min Zhang, Jun-Yu Xu, Hao Hu, Bang-Ce Ye, Minjia Tan
The studies of protein methylation mainly focus on lysine and arginine residues due to their diverse roles in essential cellular processes from gene expression to signal transduction. Nevertheless, atypical protein methylation occurring on amino acid residues, such as glutamine and glutamic acid, was largely neglected until recently. In addition, the systematic analysis for the distribution of methylation on different amino acids in various species is still lacking, which hinders our understanding of its functional roles...
November 18, 2017: Proteomics
https://www.readbyqxmd.com/read/29147551/development-of-proteolytically-stable-n-methylated-peptide-inhibitors-of-aggregation-of-the-amylin-peptide-implicated-in-type-2-diabetes
#8
Idira Obasse, Mark Taylor, Nigel J Fullwood, David Allsop
Islet amyloid polypeptide, also known as amylin, is the main component of the amyloid deposits present in approximately 90% of people with type 2 diabetes mellitus (T2DM). In this disease, amylin aggregates into multimeric β-pleated sheet structures which cause damage to pancreatic islet β-cells. Inhibitors of early-stage amylin aggregation could therefore provide a disease-modifying treatment for T2DM. In this study, overlapping peptides were designed to target the 'binding' region (RLANFLVHSS, residues 11-20) of human amylin, and their effects on amyloid fibril formation were determined by thioflavin-T assay...
December 6, 2017: Interface Focus
https://www.readbyqxmd.com/read/29142425/hypoglycemic-hypolipidemic-and-wound-healing-potential-of-quercetin-in-streptozotocin-induced-diabetic-rats
#9
Mahrukh Ahmad, Mudasir Sultana, Rajinder Raina, Nrip Kishore Pankaj, Pawan Kumar Verma, Shahid Prawez
Background: Among the dietary polyphenolic, quercetin is the most common compound available in vegetables and fruits. The phytochemicals are used to treat diabetic wounds and diabetes, and specifically dietary polyphenols are being extensively studied for their anti-inflammatory and antioxidant abilities. Objective: The objective of the study was to assess the hypoglycemic, hypolipidemic, and wound healing potential of quercetin in streptozotocin (STZ)-induced diabetic Wistar rats...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29141871/potential-approaches-to-prevent-hypoglycemia-associated-autonomic-failure
#10
REVIEW
Eric Lontchi-Yimagou, Jee Young You, Michelle Carey, Ilan Gabriely, Harry Shamoon, Meredith Hawkins
Clear health benefits are associated with intensive glucose control in type 1 diabetes mellitus (T1DM). However, maintaining near-normal glycemia remains an elusive goal for many patients, in large part owing to the risk of severe hypoglycemia. In fact, recurrent episodes of hypoglycemia lead to 'hypoglycemia-associated autonomic failure' (HAAF), characterized by defective counter-regulatory responses to hypoglycemia. Extensive studies to understand the mechanisms underlying HAAF have revealed multiple potential etiologies, suggesting various approaches to prevent the development of HAAF...
November 14, 2017: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/29135286/vitamin-b12-supplementation-influences-methylation-of-genes-associated-with-type-2-diabetes-and-its-intermediate-traits
#11
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/29130958/propofol-through-upregulating-caveolin-3-attenuates-post-hypoxic-mitochondrial-damage-and-cell-death-in-h9c2-cardiomyocytes-during-hyperglycemia
#12
Fan Deng, Shuang Wang, Liangqing Zhang, Xiang Xie, Shuyun Cai, Haobo Li, Gui-Ling Xie, Hui-Lai Miao, Changmin Yang, Xin Liu, Zhengyuan Xia
BACKGROUND/AIMS: Hearts from diabetic subjects are susceptible to myocardial ischemia reperfusion (I/R) injury. Propofol has been shown to protect against myocardial I/R injury due to its antioxidant properties while the underlying mechanism remained incompletely understood. Thus, this study aimed to determine whether or not propofol could attenuate myocardial I/R injury by attenuating mitochondrial dysfunction/damage through upregulating Caveolin (Cav)-3 under hyperglycemia. METHODS: Cultured rat cardiomyocyte H9C2 cells were subjected to hypoxia/reoxygenation (H/R) in the absence or presence of propofol under high glucose (HG), and cell viability, lactate dehydrogenase (LDH) and mitochondrial viability as well as creatine kinase-MB (CK-MB), cardiac troponin I (cTnI) and intracellular adenosine triphosphate (ATP) content were measured with colorimetric Enzyme-Linked Immunosorbent Assays...
November 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29128163/depsidone-and-xanthones-from-garcinia-xanthochymus-with-hypoglycemic-activity-and-the-mechanism-of-promoting-glucose-uptake-in-l6-myotubes
#13
Yunfang Li, Ping Zhao, Yu Chen, Yanze Fu, Kuan Shi, Liu Liu, Hui Liu, Mingrui Xiong, Qing-Hua Liu, Guangzhong Yang, Yuxiu Xiao
Garcinia xanthochymus is a widely used folk medicine in southwestern China. Previous studies indicated it possesses potential anti-diabetic activities both in vitro (Fu et al., 2014; Nguyen et al., 2017) and in vivo (Shivanand et al., 2017). To discover bioactive ingredients from it and unveil their mechanism of action against diabetes, the present study was designed to isolate constituents from extract of G. xanthochymus, determine their structures, screen their activities and investigate mechanism of action of the active substances...
November 8, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29117997/metformin-an-anti-proliferative-agent-and-methylation-regulator-in-treating-prostatic-disease
#14
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/29099273/dna-methylation-profiles-in-sibling-pairs-discordant-for-intrauterine-exposure-to-maternal-gestational-diabetes
#15
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/29098660/therapeutic-potential-of-ursolic-acid-to-manage-neurodegenerative-and-psychiatric-diseases
#16
Ana B Ramos-Hryb, Francis L Pazini, Manuella P Kaster, Ana Lúcia S Rodrigues
Ursolic acid is a pentacyclic triterpenoid found in several plants. Despite its initial use as a pharmacologically inactive emulsifier in pharmaceutical, cosmetic and food industries, several biological activities have been reported for this compound so far, including anti-tumoural, anti-diabetic, cardioprotective and hepatoprotective properties. The biological effects of ursolic acid have been evaluated in vitro, in different cell types and against several toxic insults (i.e. 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine, amyloid-β peptides, kainic acid and others); in animal models of brain-related disorders (Alzheimer disease, Parkinson disease, depression, traumatic brain injury) and ageing; and in clinical studies with cancer patients and for muscle atrophy...
November 2, 2017: CNS Drugs
https://www.readbyqxmd.com/read/29097610/understanding-mitochondrial-polymorphisms-in-cancer
#17
REVIEW
Karen M Bussard, Linda D Siracusa
Alterations in mitochondrial DNA (mtDNA) were once thought to be predominantly innocuous to cell growth. Recent evidence suggests that mtDNA undergo naturally occurring alterations, including mutations and polymorphisms, which profoundly affect the cells in which they appear and contribute to a variety of diseases, including cardiovascular disease, diabetes, and cancer. Furthermore, interplay between mtDNA and nuclear DNA has been found in cancer cells, necessitating consideration of these complex interactions for future studies of cancer mutations and polymorphisms...
November 15, 2017: Cancer Research
https://www.readbyqxmd.com/read/29091865/the-role-of-sirt1-in-diabetic-retinopathy
#18
REVIEW
Hedyieh Karbasforooshan, Gholamreza Karimi
The prevalence of diabetes mellitus (DM), has been increasing worldwide. Diabetic retinopathy (DR) is the most common microvascular complication in diabetes. It is a multifactorial disease that occurs primarily through the long-term detrimental effects of hyperglycemia. The pathogenesis of DR is complex, including inflammation, oxidative stress and advanced glycation end products (AGES). SIRT1 is a nicotinamide adenosine dinucleotide (NAD+)-dependent deacetylase that removes acetyl groups from proteins which can be implicated in DR...
October 26, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29091029/dnmt3a-is-an-epigenetic-mediator-of-adipose-insulin-resistance
#19
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/29089944/t-cell-immunosenescence-after-early-life-adversity-association-with-cytomegalovirus-infection
#20
Martha M C Elwenspoek, Krystel Sias, Xenia Hengesch, Violetta K Schaan, Fleur A D Leenen, Philipp Adams, Sophie B Mériaux, Stephanie Schmitz, Fanny Bonnemberger, Anouk Ewen, Hartmut Schächinger, Claus Vögele, Claude P Muller, Jonathan D Turner
Early life adversity (ELA) increases the risk for multiple age-related diseases, such as diabetes type 2 and cardiovascular disease. As prevalence is high, ELA poses a major and global public health problem. Immunosenescence, or aging of the immune system, has been proposed to underlie the association between ELA and long-term health consequences. However, it is unclear what drives ELA-associated immunosenescence and which cells are primarily affected. We investigated different biomarkers of immunosenescence in a healthy subset of the EpiPath cohort...
2017: Frontiers in Immunology
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