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Metabolism and epigenetic

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https://www.readbyqxmd.com/read/28106509/potential-epigenetic-biomarkers-of-obesity-related-insulin-resistance-in-human-whole-blood
#1
Samantha E Day, Richard L Coletta, Joon Young Kim, Luis A Garcia, Latoya E Campbell, Tonya R Benjamin, Lori R Roust, Elena A De Filippis, Lawrence J Mandarino, Dawn K Coletta
Obesity can increase the risk of complex metabolic diseases, including insulin resistance. Moreover, obesity can be caused by environmental and genetic factors. However, the epigenetic mechanisms of obesity are not well defined. Therefore, the identification of novel epigenetic biomarkers of obesity allows for a more complete understanding of the disease and its underlying insulin resistance. The aim of our study was to identify DNA methylation changes in whole-blood that were strongly associated with obesity and insulin resistance...
January 20, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/28100703/paternal-epigenetic-programming-evolving-metabolic-disease-risk
#2
Suzy Sj Hur, Jennifer E Cropley, Catherine M Suter
Parental health or exposures can affect the lifetime health outcomes of offspring, independently of inherited genotypes. Such 'epigenetic' effects occur over a broad range of environmental stressors, including defects in parental metabolism. While maternal metabolic effects are well documented, it has only recently been established that that there is also an independent paternal contribution to long-term metabolic health. Both paternal undernutrition and overnutrition can induce metabolic phenotypes in immediate offspring, and in some cases the induced phenotype can affect multiple generations, implying inheritance of an acquired trait...
January 18, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/28097824/mechanisms-of-metabolic-memory-and-renal-hypoxia-as-a-therapeutic-target-in-diabetic-kidney-disease
#3
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/28094005/imprinted-genes-and-the-regulation-of-placental-endocrine-function-pregnancy-and-beyond
#4
Rosalind M John
Genomic imprinting is an epigenetic process responsible for the monoallelic expression of a subset of genes in mammals. Imprinted genes have been demonstrated to play important functions prenatally regulating fetal growth and placental development with some functions persisting beyond pregnancy to influence both metabolism and behaviour in adults. This review focuses on the function of imprinted genes in regulating placental hormones, and the probability that these functions manifest their impact beyond pregnancy...
January 10, 2017: Placenta
https://www.readbyqxmd.com/read/28092686/epigenomic-reprogramming-during-pancreatic-cancer-progression-links-anabolic-glucose-metabolism-to-distant-metastasis
#5
Oliver G McDonald, Xin Li, Tyler Saunders, Rakel Tryggvadottir, Samantha J Mentch, Marc O Warmoes, Anna E Word, Alessandro Carrer, Tal H Salz, Sonoko Natsume, Kimberly M Stauffer, Alvin Makohon-Moore, Yi Zhong, Hao Wu, Kathryn E Wellen, Jason W Locasale, Christine A Iacobuzio-Donahue, Andrew P Feinberg
During the progression of pancreatic ductal adenocarcinoma (PDAC), heterogeneous subclonal populations emerge that drive primary tumor growth, regional spread, distant metastasis, and patient death. However, the genetics of metastases largely reflects that of the primary tumor in untreated patients, and PDAC driver mutations are shared by all subclones. This raises the possibility that an epigenetic process might operate during metastasis. Here we report large-scale reprogramming of chromatin modifications during the natural evolution of distant metastasis...
January 16, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28092669/interplay-between-epigenetics-and-metabolism-in-oncogenesis-mechanisms-and-therapeutic-approaches
#6
REVIEW
C C Wong, Y Qian, J Yu
Epigenetic and metabolic alterations in cancer cells are highly intertwined. Oncogene-driven metabolic rewiring modifies the epigenetic landscape via modulating the activities of DNA and histone modification enzymes at the metabolite level. Conversely, epigenetic mechanisms regulate the expression of metabolic genes, thereby altering the metabolome. Epigenetic-metabolomic interplay has a critical role in tumourigenesis by coordinately sustaining cell proliferation, metastasis and pluripotency. Understanding the link between epigenetics and metabolism could unravel novel molecular targets, whose intervention may lead to improvements in cancer treatment...
January 16, 2017: Oncogene
https://www.readbyqxmd.com/read/28090638/late-gestational-intermittent-hypoxia-induces-metabolic-and-epigenetic-changes-in-male-adult-offspring-mice
#7
Abdelnaby Khalyfa, Rene Cortese, Zhuanhong Qiao, Honggang Ye, Riyue Bao, Jorge Andrade, David Gozal
Pregnancy, particularly late gestation, has been associated with a relatively high prevalence of obstructive sleep apnea (OSA). Intermittent hypoxia (IH), a hallmark of OSA, could impose significant long-term effects on somatic growth, energy homeostasis, and metabolic function in offspring. We hypothesized that IH during late pregnancy (LG-IH) may increase the propensity for metabolic dysregulation and obesity in adult offspring via epigenetic modifications. Time-pregnant female C57BL/6 mice were exposed to LG-IH or room air (LG-RA) during days 13-18 of gestation...
January 15, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28087927/genome-wide-approaches-to-defining-macrophage-identity-and-function
#8
Gregory J Fonseca, Jason S Seidman, Christopher K Glass
Macrophages play essential roles in the response to injury and infection and contribute to the development and/or homeostasis of the various tissues they reside in. Conversely, macrophages also influence the pathogenesis of metabolic, neurodegenerative, and neoplastic diseases. Mechanisms that contribute to the phenotypic diversity of macrophages in health and disease remain poorly understood. Here we review the recent application of genome-wide approaches to characterize the transcriptomes and epigenetic landscapes of tissue-resident macrophages...
October 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28080202/chemical-probes-targeting-epigenetic-proteins-applications-beyond-oncology
#9
Suzanne Ackloo, Peter J Brown, Susanne Müller
Epigenetic chemical probes are potent, cell-active, small molecule inhibitors and antagonists of specific domains in a protein; they have been indispensable for studying bromodomains and protein methyltransferases. The Structural Genomics Consortium (SGC), comprising scientists from academic and pharmaceutical laboratories, has generated most of the current epigenetic chemical probes. Moreover, the SGC has shared about four thousand aliquots of these probes, which have been used primarily for phenotypic profiling or to validate targets in cell lines or primary patient samples cultured in vitro...
January 12, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/28079507/do-micrornas-have-a-key-epigenetic-role-in-osteoarthritis-and-in-mechanotransduction
#10
REVIEW
Anna De Palma, Sara Cheleschi, Nicola Antonio Pascarelli, Sara Tenti, Mauro Galeazzi, Antonella Fioravanti
Osteoarthritis (OA) is the most common degenerative disease affecting joint tissues. The pathogenesis of OA is complex and poorly understood, as well as the multiple factors contributing to its development and progression. Accumulating evidence has suggested that microRNAs (miRNAs) play an important role as regulators of cartilage biology and in the pathogenesis of OA. It has been demonstrated that mechanical loading, important for the regulation of cartilage metabolism, affects miRNAs expression. Furthermore, miRNAs present in human plasma and in synovial fluid could represent promising biological markers for OA...
January 4, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28076695/deacetylase-inhibitors-an-advance-in-myeloma-therapy
#11
Jacob P Laubach, Jesus F San-Miguel, Vania Hungria, Jian Hou, Philippe Moreau, Sagar Lonial, Jae Hoon Lee, Hermann Einsele, Melissa Alsina, Paul G Richardson
A significant unmet need exists in patients with relapsed or refractory multiple myeloma (MM), which remains an incurable disease despite recent advances in the field. One such development was the use of deacetylase inhibitors (DACi), which exert unique antimyeloma effects through targeting of epigenetic and protein metabolism pathways. The pan-DACi panobinostat was recently approved in combination with bortezomib and dexamethasone for use in patients with relapsed or relapsed and refractory MM. Results of a phase 3 trial showed that the panobinostat-containing regimen improved the overall response rate and progression-free survival...
January 11, 2017: Expert Review of Hematology
https://www.readbyqxmd.com/read/28076319/impact-of-nutrition-on-pollutant-toxicity-an-update-with-new-insights-into-epigenetic-regulation
#12
Jessie B Hoffman, Michael C Petriello, Bernhard Hennig
Exposure to environmental pollutants is a global health problem and is associated with the development of many chronic diseases, including cardiovascular disease, diabetes and metabolic syndrome. There is a growing body of evidence that nutrition can both positively and negatively modulate the toxic effects of pollutant exposure. Diets high in proinflammatory fats, such as linoleic acid, can exacerbate pollutant toxicity, whereas diets rich in bioactive and anti-inflammatory food components, including omega-3 fatty acids and polyphenols, can attenuate toxicant-associated inflammation...
January 11, 2017: Reviews on Environmental Health
https://www.readbyqxmd.com/read/28071704/high-fat-diet-induced-changes-of-mouse-hepatic-transcription-and-enhancer-activity-can-be-reversed-by-subsequent-weight-loss
#13
Majken Siersbæk, Lyuba Varticovski, Shutong Yang, Songjoon Baek, Ronni Nielsen, Susanne Mandrup, Gordon L Hager, Jay H Chung, Lars Grøntved
Epigenetic factors have been suggested to play an important role in metabolic memory by trapping and maintaining initial metabolic changes within the transcriptional regulatory machinery. In this study we fed mice a high fat diet (HFD) for seven weeks followed by additional five weeks of chow, to identify HFD-mediated changes to the hepatic transcriptional program that may persist after weight loss. Mice fed a HFD displayed increased fasting insulin levels, hepatosteatosis and major changes in hepatic gene transcription associated with modulation of H3K27Ac at enhancers, but no significant changes in chromatin accessibility, indicating that HFD-regulated gene transcription is primarily controlled by modulating the activity of pre-established enhancers...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28071676/transcriptome-analysis-of-neo-tetraploid-rice-reveals-specific-differential-gene-expressions-associated-with-fertility-and-heterosis
#14
Haibin Guo, Jean Nestor Mendrikahy, Lei Xie, Junfeng Deng, Zijun Lu, Jinwen Wu, Xiang Li, Muhammad Qasim Shahid, Xiangdong Liu
Polyploid rice hybrids have a powerful biological and yield potential that may become a new way for rice breeding; however, low fertility is major hindrance in commercial utilization. Here, we developed a neo-tetraploid rice that could overcome the sterility of autotetraploid rice and produce high heterosis. Transcriptome analysis of F1 hybrid developed by crossing neo-tetraploid with autotetraploid rice displayed 807, 663 and 866 differentially expressed genes that uniquely associated with F1 and specific to (DEGFu-sp) anther, ovary and leaf, respectively...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28068486/the-changing-epidemiology-of-autism-spectrum-disorders
#15
Kristen Lyall, Lisa Croen, Julie Daniels, M Daniele Fallin, Christine Ladd-Acosta, Brian K Lee, Bo Y Park, Nathaniel W Snyder, Diana Schendel, Heather E Volk, Gayle C Windham, Craig Newschaffer
Autism spectrum disorder (ASD) is a complex neurodevelopmental condition with lifelong impacts. Genetic and environmental factors contribute to ASD etiology, which remains incompletely understood. Research on ASD epidemiology has made significant advances in the past decade. Current prevalence is estimated to be at least 1.5% in developed countries, with recent increases primarily among those without comorbid intellectual disability. Genetic studies have identified a number of rare de novo mutations and gained footing in the areas of polygenic risk, epigenetics, and gene-by-environment interaction...
December 21, 2016: Annual Review of Public Health
https://www.readbyqxmd.com/read/28068482/metabolic-reprogramming-in-brain-tumors
#16
Sriram Venneti, Craig B Thompson
Next-generation sequencing has substantially enhanced our understanding of the genetics of primary brain tumors by uncovering several novel driver genetic alterations. How many of these genetic modifications contribute to the pathogenesis of brain tumors is not well understood. An exciting paradigm emerging in cancer biology is that oncogenes actively reprogram cellular metabolism to enable tumors to survive and proliferate. We discuss how some of these genetic alterations in brain tumors rewire metabolism...
December 21, 2016: Annual Review of Pathology
https://www.readbyqxmd.com/read/28061334/arginine-methylation-the-coming-of-age
#17
REVIEW
Roméo S Blanc, Stéphane Richard
Arginine methylation is a common post-translational modification functioning as an epigenetic regulator of transcription and playing key roles in pre-mRNA splicing, DNA damage signaling, mRNA translation, cell signaling, and cell fate decision. Recently, a wealth of studies using transgenic mouse models and selective PRMT inhibitors helped define physiological roles for protein arginine methyltransferases (PRMTs) linking them to diseases such as cancer and metabolic, neurodegenerative, and muscular disorders...
January 5, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28060197/identical-twins-discordant-for-metopic-craniosynostosis-evidence-of-epigenetic-influences
#18
Suresh N Magge, Kendall Snyder, Aparna Sajja, Tiffani A DeFreitas, Sean E Hofherr, Richard E Broth, Robert F Keating, Gary F Rogers
Craniosynostosis, or premature fusion of the cranial sutures, occurs in approximately 1 in 2500 live births. The genetic causes and molecular basis of these disorders have greatly expanded over the last 2 decades, with numerous causative and contributory mutations having been identified. The role of fibroblast growth factor receptor (FGFR) mutations in the etiology of certain eponymous forms of craniosynostosis is now well elucidated; the most common syndromes associated with craniosynostosis are Pfeifer (FGFR1, FGFR2), Apert (FGFR2), Crouzon (FGFR2), Saethre-Chotzen (TWIST1), Jackson-Weiss (FGFR2), Greig (GL13), and Muenke (FGFR3) syndromes...
January 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28059170/in-ovo-injection-of-betaine-alleviates-corticosterone-induced-fatty-liver-in-chickens-through-epigenetic-modifications
#19
Yun Hu, Qinwei Sun, Jie Liu, Yimin Jia, Demin Cai, Abdulrahman A Idriss, Nagmeldin A Omer, Ruqian Zhao
Betaine alleviates high-fat diet-induced fatty liver and prenatal betaine programs offspring hepatic lipid metabolism. Excessive corticosterone (CORT) exposure causes fatty liver in chickens, yet it remains unknown whether and how prenatal betaine modulates the susceptibility of CORT-induced fatty liver later in life. In this study, fertilized eggs were injected with saline or betaine before incubation, and the hatchlings were raised at 8 weeks of age followed by 7 days of subcutaneous CORT injection. CORT-induced fatty liver was less severe in betaine-treated chickens, with significantly reduced oil-red staining and hepatic triglyceride content (P < 0...
January 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28051947/early-life-effects-on-adult-physical-activity-concepts-relevance-and-experimental-approaches
#20
Theodore Garland, Marcell D Cadney, Robert A Waterland
Locomotion is a defining characteristic of animal life and plays a crucial role in most behaviors. Locomotion involves physical activity, which can have far-reaching effects on physiology and neurobiology, both acutely and chronically. In human populations and in laboratory rodents, higher levels of physical activity are generally associated with positive health outcomes, although excessive exercise can have adverse consequences. Whether and how such relationships occur in wild animals is unknown. Behavioral variation among individuals arises from genetic and environmental factors and their interactions as well as from developmental programming (persistent effects of early-life environment)...
January 2017: Physiological and Biochemical Zoology: PBZ
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