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Diabetes methylation

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https://www.readbyqxmd.com/read/28097824/mechanisms-of-metabolic-memory-and-renal-hypoxia-as-a-therapeutic-target-in-diabetic-kidney-disease
#1
REVIEW
Yosuke Hirakawa, Tetsuhiro Tanaka, Masaomi Nangaku
Diabetic kidney disease (DKD) is a worldwide public health problem. The definition of DKD is being under discussion. Although the term DKD was originally defined as "kidney disease specific to diabetes", DKD frequently means chronic kidney disease (CKD) with diabetes mellitus and includes not only classical diabetic nephropathy, but also kidney dysfunction due to nephrosclerosis and other causes. Metabolic memory plays a crucial role in the progression of various complications of diabetes, including DKD. The mechanisms of metabolic memory in DKD are supposed to include advanced glycation end products, DNA methylation, histone modifications, and non-coding RNA including microRNA...
January 17, 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/28094306/maternal-diabetes-modulates-dental-epithelial-stem-cells-proliferation-and-self-renewal-in-offspring-through-apurinic-apyrimidinicendonuclease-1-mediated-dna-methylation
#2
Guoqing Chen, Jie Chen, Zhiling Yan, Ziyue Li, Mei Yu, Weihua Guo, Weidong Tian
Maternal gestational diabetes mellitus (GDM) has many adverse effects on the development of offspring. Aberrant DNA methylation is a potential mechanism associated with these effects. However, the effects of GDM on tooth development and the underlying mechanisms have not been thoroughly investigated. In the present study, a GDM rat model was established and incisor labial cervical loop tissue and dental epithelial stem cells (DESCs) were harvested from neonates of diabetic and control dams. GDM significantly suppressed incisor enamel formation and DESCs proliferation and self-renewal in offspring...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28092826/synthesis-ph-dependent-photometric-and-electrochemical-investigation-redox-mechanism-and-biological-applications-of-novel-schiff-base-and-its-metallic-derivatives
#3
Abdur Rauf, Afzal Shah, Abdul Aziz Khan, Aamir Hassan Shah, Rashda Abbasi, Irfan Zia Qureshi, Saqib Ali
A novel Schiff base, 1-((2, 4-dimethylphenylimino)methyl)naphthalen-2-ol abbreviated as (HL) and its four metallic complexes were synthesized and confirmed by (1)H and (13)C NMR, FTIR, TGA and UV-Visible spectroscopy. Schiff base was also characterized by X-ray analysis. The photometric and electrochemical responses of all the synthesized compounds were investigated in a wide pH range. Structures of the compounds were optimized computationally for the evaluation of different physico-chemical parameters. On the basis of electrochemical results the redox mechanistic pathways of the compounds were proposed...
January 9, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28087254/anti-diabetic-drug-metformin-dilates-retinal-blood-vessels-through-activation-of-amp-activated-protein-kinase-in-rats
#4
Asami Mori, Eriko Ishikawa, Tomoyo Amano, Kenji Sakamoto, Tsutomu Nakahara
The aim of this study was to examine whether metformin, a biguanide anti-hyperglycemic drug, dilates retinal blood vessels in rats. Ocular fundus images were captured with an original high-resolution digital fundus camera in vivo and diameters of retinal blood vessels were measured. Both systemic blood pressure and heart rate were continuously recorded. Metformin (0.01-0.3mg/kg/min) increased diameters of retinal blood vessels in a dose-dependent manner. This retinal vasodilator effect of metformin was abolished by compound C, an inhibitor of AMP-activated protein kinase (AMPK), and N(G)-nitro-L-arginine methyl ester, an inhibitor of nitric oxide (NO) synthase...
January 10, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28079150/sustained-kidney-biochemical-derangement-in-treated-experimental-diabetes-a-clue-to-metabolic-memory
#5
Antonio Anax F de Oliveira, Tiago F de Oliveira, Larissa L Bobadilla, Camila C M Garcia, Carolina Maria Berra, Nadja C de Souza-Pinto, Marisa H G Medeiros, Paolo Di Mascio, Roberto Zatz, Ana Paula de M Loureiro
The occurrence of biochemical alterations that last for a long period of time in diabetic individuals even after adequate handling of glycemia is an intriguing phenomenon named metabolic memory. In this study, we show that a kidney pathway is gradually altered during the course of diabetes and remains persistently changed after late glycemic control in streptozotocin-induced diabetic rats. This pathway comprises an early decline of uric acid clearance and pAMPK expression followed by fumarate accumulation, increased TGF-β expression, reduced PGC-1α expression, and downregulation of methylation and hydroxymethylation of mitochondrial DNA...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28073046/olanzapine-and-aripiprazole-differentially-affect-glucose-uptake-and-energy-metabolism-in-human-mononuclear-blood-cells
#6
Britta Stapel, Alexandra Kotsiari, Michaela Scherr, Denise Hilfiker-Kleiner, Stefan Bleich, Helge Frieling, Kai G Kahl
The use of antipsychotics carries the risk of metabolic side effects, such as weight gain and new onset type-2 diabetes mellitus. The mechanisms of the observed metabolic alterations are not fully understood. We compared the effects of two atypical antipsychotics, one known to favor weight gain (olanzapine), the other not (aripiprazole), on glucose metabolism. Primary human peripheral blood mononuclear cells (PBMC) were isolated and stimulated with olanzapine or aripiprazole for 72 h. Cellular glucose uptake was analyzed in vitro by 18F-FDG uptake...
December 22, 2016: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28072825/dietary-chromium-restriction-of-pregnant-mice-changes-the-methylation-status-of-hepatic-genes-involved-with-insulin-signaling-in-adult-male-offspring
#7
Qian Zhang, Xiaofang Sun, Xinhua Xiao, Jia Zheng, Ming Li, Miao Yu, Fan Ping, Zhixin Wang, Cuijuan Qi, Tong Wang, Xiaojing Wang
Maternal undernutrition is linked with an elevated risk of diabetes mellitus in offspring regardless of the postnatal dietary status. This is also found in maternal micro-nutrition deficiency, especial chromium which is a key glucose regulator. We investigated whether maternal chromium restriction contributes to the development of diabetes in offspring by affecting DNA methylation status in liver tissue. After being mated with control males, female weanling 8-week-old C57BL mice were fed a control diet (CON, 1...
2017: PloS One
https://www.readbyqxmd.com/read/28068899/maternal-bmi-as-a-predictor-of-methylation-of-obesity-related-genes-in-saliva-samples-from-preschool-age-hispanic-children-at-risk-for-obesity
#8
Kathryn Tully Oelsner, Yan Guo, Sophie Bao-Chieu To, Amy L Non, Shari L Barkin
BACKGROUND: The study of epigenetic processes and mechanisms present a dynamic approach to assess complex individual variation in obesity susceptibility. However, few studies have examined epigenetic patterns in preschool-age children at-risk for obesity despite the relevance of this developmental stage to trajectories of weight gain. We hypothesized that salivary DNA methylation patterns of key obesogenic genes in Hispanic children would 1) correlate with maternal BMI and 2) allow for identification of pathways associated with children at-risk for obesity...
January 9, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28060259/measurement-of-differentially-methylated-ins-dna-species-in-human-serum-samples-as-a-biomarker-of-islet-%C3%AE-cell-death
#9
Sarah A Tersey, Jennifer B Nelson, Marisa M Fisher, Raghavendra G Mirmira
The death of islet β cells is thought to underlie the pathogenesis of virtually all forms of diabetes and to precede the development of frank hyperglycemia, especially in type 1 diabetes. The development of sensitive and reliable biomarkers of β cell death may allow for early therapeutic intervention to prevent or delay the development of diabetes. Recently, several groups including our own have reported that cell-free, differentially methylated DNA encoding preproinsulin (INS) in the circulation is correlated to β cell death in pre-type 1 diabetes and new-onset type 1 diabetes...
December 21, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28052964/whole-genome-bisulfite-sequencing-of-human-pancreatic-islets-reveals-novel-differentially-methylated-regions-in-type-2-diabetes-pathogenesis
#10
Petr Volkov, Karl Bacos, Jones K Ofori, Jonathan Lou S Esguerra, Lena Eliasson, Tina Rönn, Charlotte Ling
Current knowledge about the role of epigenetics in type 2 diabetes (T2D) remains limited. Only a few studies have investigated DNA methylation of selected candidate genes or a very small fraction of genomic CpG sites in human pancreatic islets, the tissue of primary pathogenic importance for diabetes. Our aim was to characterize the whole-genome DNA methylation landscape in human pancreatic islets, to identify differentially methylated regions (DMRs) in diabetic islets, and to investigate the function of DMRs in islet biology...
January 4, 2017: Diabetes
https://www.readbyqxmd.com/read/28036045/multifunctional-composite-microcapsules-for-oral-delivery-of-insulin
#11
Shaoping Sun, Na Liang, Xianfeng Gong, Weiwei An, Yoshiaki Kawashima, Fude Cui, Pengfei Yan
In this study, we designed and developed a new drug delivery system of multifunctional composite microcapsules for oral administration of insulin. Firstly, in order to enhance the encapsulation efficiency, insulin was complexed with functional sodium deoxycholate to form insulin-sodium deoxycholate complex using hydrophobic ion pairing method. Then the complex was encapsulated into poly(lactide-co-glycolide) (PLGA) nanoparticles by emulsion solvent diffusion method. The PLGA nanoparticles have a mean size of 168 nm and a zeta potential of -29...
December 28, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28031460/inhibitory-role-of-%C3%AE-2-6-sialylation-in-adipogenesis
#12
Tomoko Kaburagi, Yasuhiko Kizuka, Shinobu Kitazume, Naoyuki Taniguchi
Adipose tissue plays critical roles in obesity and related diseases such as diabetes and cardiovascular diseases. Previous reports suggest that glycans, the most common post-translational modifications, are involved in obesity-related diseases, but what type of glycan regulates adipogenesis during obesity remains unclear. In this study, we first quantified the mRNA levels of 167 genes (encoding 144 glycosyltransferases and 23 related enzymes) in visceral adipose tissues (VATs) from control mice and high fat diet (HFD)-induced obese mice...
December 28, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28029544/lc-ms-ms-method-for-quantitation-of-seven-biomarkers-in-human-plasma-for-the-assessment-of-insulin-resistance-and-impaired-glucose-tolerance
#13
Qibo Zhang, Lisa A Ford, Kelli D Goodman, Tiffany A Freed, Deirdre M Hauser, Jessie K Conner, Kate E T Vroom, Douglas R Toal
Early detection of insulin resistance (IR) and/or impaired glucose tolerance (IGT) is crucial for delaying and preventing the progression toward type 2 diabetes. We recently developed and validated a straightforward metabolite-based test for the assessment of IR and IGT in a single LC-MS/MS method. Plasma samples were diluted with isotopically-labeled internal standards and extracted by simple protein precipitation. The extracts were analyzed by LC-MS/MS for the quantitation of 2-hydroxybutyric acid (0.500-40...
October 24, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28025996/rosuvastatin-as-a-potential-preventive-drug-for-the-development-of-hepatocellular-carcinoma-associated-with-non-alcoholic-fatty-liver-disease-in-mice
#14
Keisuke Yokohama, Shinya Fukunishi, Masaaki Ii, Ken Nakamura, Hideko Ohama, Yusuke Tsuchimoto, Akira Asai, Yasuhiro Tsuda, Kazuhide Higuchi
Hepatocellular carcinoma (HCC) represents approximately 85% of all primary liver cancer cases. Non-alcoholic fatty liver disease (NAFLD) is one of the risk factors for HCC. NAFLD occurs in patients with components of metabolic syndrome, such as type 2 diabetes mellitus, obesity, hypertension and hyperlipidemia. Therefore, hyperlipidemia also represents a patient population at risk for HCC that can readily be identified. Rosuvastatin, a 3-hydroxy-3-methyl-glutaryl coenzyme A (HMG-CoA) reductase inhibitor, has exhibited a more potent affinity for the active site of HMG-CoA reductase than other statins...
November 2016: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28025466/deterioration-of-epithelium-mediated-mechanisms-in-diabetic-antigen-sensitized-airways-of-guinea-pigs
#15
Saidullah Bano, Omanwar Swati, Muralidhar Kambadur, Fahim Mohammad
BACKGROUND: The onset of diabetes causes disruption of respiratory epithelial mediators. The present study investigates whether diabetes modifies the epithelium mediated bronchial responses in hyper-reactive airway smooth muscle (ASM) primarily through nitric oxide (NO), cyclooxygenase (COX), and epithelium derived hyperpolarizing factor (EpDHF) pathways. METHODS: Experimental model of guinea pigs having hyper-reactive airways with or without diabetes were developed...
2016: Journal of Smooth Muscle Research, Nihon Heikatsukin Gakkai Kikanshi
https://www.readbyqxmd.com/read/28011458/insulin-and-glucose-alter-death-associated-protein-kinase-3-dapk3-dna-methylation-in-human-skeletal-muscle
#16
Jonathan M Mudry, David G Lassiter, Carolina Nylén, Sonia García-Calzón, Erik Näslund, Anna Krook, Juleen R Zierath
DNA methylation is altered by environmental factors. We hypothesized DNA methylation is altered in skeletal muscle in response to either insulin or glucose exposure. We performed a genome-wide DNA methylation analysis in muscle from healthy men before and after insulin exposure. DNA methylation of selected genes was determined in muscle from healthy and type 2 diabetic men before and after a glucose tolerance test. Insulin altered DNA methylation in the 3'UTR of the calcium pump ATP2A3 gene. Insulin increased DNA methylation in the gene body of DAPK3, a gene involved in cell proliferation, apoptosis and autophagy...
December 23, 2016: Diabetes
https://www.readbyqxmd.com/read/28006780/resveratrol-improves-cognitive-impairment-by-regulating-apoptosis-and-synaptic-plasticity-in-streptozotocin-induced-diabetic-rats
#17
Zhiyan Tian, Jinhua Wang, Ming Xu, Yan Wang, Miao Zhang, Yuying Zhou
AIMS: To investigate the effects of resveratrol on cognitive impairment in streptozotocin (STZ)-induced diabetic rats and to explore the mechanisms of that phenomenon. METHODS: Sixty healthy male Sprague Dawley rats were randomly divided into four groups: normal control group (Con group, n = 15), Res group (normal Sprague Dawley rats treated with resveratrol, n = 15), diabetes mellitus group (DM group, n = 15) and DM + Res group (diabetic rats treat with resveratrol, n = 15)...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28004495/molecular-dynamics-simulation-on-the-inhibition-mechanism-of-peptide-based-inhibitor-of-islet-amyloid-polypeptide-iapp-to-islet-amyloid-polypeptide-iapp22-28-oligomers
#18
Shuangyan Zhou, Qianqian Wang, Mengdan Ren, Ai Zhang, Huanxiang Liu, Xiaojun Yao
Aggregation of islet amyloid polypeptide (IAPP) is implicated in the development of type 2 diabetes (T2D) The modified NFGAIL with double N-methylated at Gly24 and Ile26 has the property of soluble, nonamyloidogenic, noncytotoxic and the ability of inhibiting amyloid formation and cytotoxicity of IAPP. To discover the inhibition mechanism of this peptide inhibitor and provide useful information to design more potential peptide inhibitors, molecular dynamics simulations in explicit solvent were performed. The simulation results reveal that Gly24 and Ile26 are of importance in IAPP aggregation, and N-methylation at these two key residues will disrupt the stability of formed oligomer and prevent the conformation transition of free monomer near the oligomer template...
December 22, 2016: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28004224/antioxidant-and-antiproliferative-effects-of-different-solvent-fractions-from-terminalia-belerica-roxb-fruit-on-various-cancer-cells
#19
Tapasree Basu, Sourav Panja, Nikhil Baban Ghate, Dipankar Chaudhuri, Nripendranath Mandal
Terminalia belerica Roxb. fruits have been previously reported against diabetes, ulcer, microbial problems and hepatotoxicity. The present study was aimed to investigate antioxidant and anticancer potential of sequentially fractionated hexane (TBHE), chloroform (TBCE), ethyl acetate (TBEE), butanol (TBBE) and water (TBWE) extracts from the 70% methanolic extract of T. belerica fruits. TBCE, TBEE, TBBE and TBWE showed excellent ROS (reactive oxygen species) and RNS (reactive nitrogen species) scavenging activities which was investigated using 11 different assays for various free radicals...
December 21, 2016: Cytotechnology
https://www.readbyqxmd.com/read/28004076/-research-progress-of-kr%C3%A3-ppel-like-factor-7
#20
Yue-Chan Chen, Hong Wei, Zhi-Wei Zhang
Krüppel-like factor 7 (KLF7), a member of Krüppel-like transcription factors (KLFs), also known as ubiquitous Krüppel- like factor (UKLF), is ubiquitously expressed in various tissues of adult human beings. Genetics reports showed that the genetic polymorphism of KLF7 is associated with obesity, type 2 diabetes, mental development in human beings; and KLF7 methylation is associated with the development of diffuse gastric cancer (gastric adenocarcinoma). In addition, some genomics reports suggested that KLF7 is one of the key transcription factors in the regulatory networks of serum markers change during the cardiovascular disease...
December 25, 2016: Sheng Li Xue Bao: [Acta Physiologica Sinica]
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