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Metabolism and epigenetics

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https://www.readbyqxmd.com/read/28934695/type-1-diabetes-and-viral-infections-what-is-the-relationship
#1
REVIEW
Nicola Principi, Maria Giulia Berioli, Sonia Bianchini, Susanna Esposito
Type 1 diabetes (T1D) is the most common chronic metabolic disorder in children. Epigenetic and environmental factors capable of altering the penetrance of major susceptibility genes or capable of increasing the penetrance of low-risk genes are currently thought to play a role in triggering autoimmunity and T1D development. This paper discusses the current knowledge of the role of viruses in T1D. Most studies that have evaluated the potential association between viral infections and T1D have indicated that it is highly likely that some of these infectious agents play a role in T1D development...
September 8, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28934375/into-the-wild-parallel-transcriptomics-of-the-tsetse-wigglesworthia-mutualism-within-kenyan-populations
#2
Miguel Medina Munoz, Adam R Pollio, Hunter L White, Rita V M Rio
Tsetse flies (Diptera: Glossinidae) have medical significance as the obligate vectors of African trypanosomes. In addition, tsetse harbor a simple gut microbiota. A predominant gut microbiota member, the Gammaproteobacterium Wigglesworthia spp., has coevolved with tsetse for a significant portion of Glossina radiation proving critical to tsetse fitness. Although multiple roles have been described for Wigglesworthia within colony flies, little research has been dedicated towards functional characterization within wild tsetse...
September 1, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28933105/-nrf2-nf-%C3%AE%C2%BAb-pathway-axes-epigenetic-regulation-and-traditional-chinese-medicine-natural-medicine-to-treat-type-2-diabetes
#3
REVIEW
Chun-Mei Zhai, Bo-Yu Jia, Zhi-Bin Wang, Xue Huai, Zhi-Chao Ma, Zhen-Kun Tian, Yong-Hai Meng
Diabetes mellitus is a characterized by high blood sugar metabolic disease, is a lifelong disease with a high incidence of major hazards. Prevention and treatment of diabetes and its complications has become a serious challenge and arduous task facing the world pharmaceutical researchers. Oxidative stress, Nfr2-NF-κB signaling axis related epigenomic genes have the apparent close relationship with type 2 diabetes,those have become one of the key focus and effective way to explore its pathogenesis, mechanism and drug screening...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28931725/yap-taz-mediated-activation-of-serine-metabolism-and-histone-methylation-is-critical-for-lkb1-deficient-breast-cancer-progression
#4
Qi Wu, Juanjuan Li, Si Sun, Xinyue Chen, Hanpu Zhang, Bei Li, Shengrong Sun
The crucial interplay between metabolic remodeling and the epigenetics could contribute to promote cancer progression. A remarkable association within interaction, LKB1 has been reported, suggesting that the expression of key enzymes involving de novo serine synthesis and DNA methyltransferases like DNMT1 and DNMT3A increase LKB1-deficiency cells. However, the complex interactional link between metabolic remodeling and the epigenetics is still unclear. Hence, we focus on the relationship between YAP/TAZ and serine metabolism to control methylation of DNA or histone in breast cancer with LKB1-deficiency...
September 20, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28931650/epigenetic-inactivation-of-tumour-suppressor-coding-and-non-coding-genes-in-human-cancer-an-update
#5
REVIEW
Pere Llinàs-Arias, Manel Esteller
Cancer cells undergo many different alterations during their transformation, including genetic and epigenetic events. The controlled division of healthy cells can be impaired through the downregulation of tumour suppressor genes. Here, we provide an update of the mechanisms in which epigenetically altered coding and non-coding tumour suppressor genes are implicated. We will highlight the importance of epigenetics in the different molecular pathways that lead to enhanced and unlimited capacity of division, genomic instability, metabolic shift, acquisition of mesenchymal features that lead to metastasis, and tumour plasticity...
September 2017: Open Biology
https://www.readbyqxmd.com/read/28931558/pathological-processes-and-therapeutic-advances-in-radioiodide-refractory-thyroid-cancer
#6
Marika H Tesselaar, Jan Wa Smit, James Nagarajah, Romana T Netea-Maier, Theo S Plantinga
Whereas in most patients with non-medullary thyroid cancer (TC) disease remission is achieved by thyroidectomy and ablation of tumor remnants by radioactive iodide (RAI), a substantial subgroup of patients with metastatic disease present tumor lesions that have acquired RAI resistance as a result of dedifferentiation. Although oncogenic mutations in BRAF, TERT promoter and TP53 are associated with an increased propensity for induction of dedifferentiation, the role of genetic and epigenetic aberrations and their effects on important intracellular signaling pathways is not yet fully elucidated...
September 20, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/28931409/clinical-review-of-24-35%C3%A2-year-olds-conceived-with-and-without-in-vitro-fertilization-study-protocol
#7
Sharon Lewis, Joanne Kennedy, David Burgner, Robert McLachlan, Sarath Ranganathan, Karin Hammarberg, Richard Saffery, David J Amor, Michael M H Cheung, Lex W Doyle, Markus Juonala, Susan Donath, John McBain, Jane Halliday
BACKGROUND: Children conceived by assisted reproductive technologies (ART) currently comprise 4% of Australian births. The manipulation of biological parameters related to fertilization and implantation are integral to successful ART but potentially pose a risk to the longer-term health of the offspring. There is consensus that many common adult health problems (particularly cardiovascular, metabolic and respiratory conditions) have their origins in early life, possibly before birth, and that risk trajectories track through childhood until clinical disease manifests in adulthood...
September 20, 2017: Reproductive Health
https://www.readbyqxmd.com/read/28928387/bi-directional-effects-of-vitamin-b12-and-methotrexate-on-daphnia-magna-fitness-and-genomic-methylation
#8
Fitore Kusari, Alan M O'Doherty, Nikolas J Hodges, Marcin W Wojewodzic
Here we interrogated, using three separate but complementary experimental approaches, the impact of vitamin B12 availability and methotrexate exposure on Daphnia magna, which we hypothesised should have an opposite effect on One carbon metabolism (OCM). OCM is a vital biological process supporting a variety of physiological processes, including DNA methylation. Contrary to mammalian models, this process remains largely unexplored in invertebrates. The purpose of this study was to elucidate the impact of OCM short-term alteration on the fitness and epigenome of the keystone species, Daphnia...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28926142/primary-osteoporosis-is-not-reflected-by-disease-specific-dna-methylation-or-accelerated-epigenetic-age-in-blood
#9
Eduardo Fernandez-Rebollo, Monika Eipel, Lothar Seefried, Per Hoffmann, Klaus Strathmann, Franz Jakob, Wolfgang Wagner
Osteoporosis is an age-related metabolic bone disease. Hence, osteoporotic patients might suffer from molecular features of accelerated aging, which is generally reflected by specific age-associated DNA methylation (DNAm) changes. In this study, we analyzed genome wide DNAm profiles of peripheral blood from patients with manifest primary osteoporosis and non-osteoporotic controls. Statistical analysis did not reveal any individual CG dinucleotides (CpG sites) with significant aberrant DNAm in osteoporosis. Subsequently, we analyzed if age-associated DNAm patterns are increased in OP...
September 19, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28921259/epigenetic-effects-of-the-pregnancy-mediterranean-diet-adherence-on-the-offspring-metabolic-syndrome-markers
#10
REVIEW
David Lorite Mingot, Eva Gesteiro, Sara Bastida, Francisco J Sánchez-Muniz
Metabolic syndrome (MS) has a multifactorial and not yet fully clarified origin. Insulin resistance is a key element that connects all the accepted components of MS (obesity, dyslipemia, high blood pressure, and hyperglycemia). There is strong evidence that epigenetic changes during fetal development are key factors in the development of MS. These changes are induced by maternal nutrition, among different factors, affecting the intrauterine environment. The Mediterranean diet has been shown to be a healthy eating pattern that protects against the development of MS in adults...
September 18, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28917077/pancreatic-%C3%AE-cells-and-type-2-diabetes-development
#11
Miranda-Perez Maria Elizabeth, Alarcon-Aguilar, Francisco J, Ortega-Camarillo Clara, Escobar-Villanueva, Maria Del Carmen
Diabetes mellitus (DM) is a group of metabolic disorders characterized by hyperglycemia. In particular, type 2 diabetes (T2D) represents one of the main causes of death in the world, and those suffering from it have a lower quality of life. Although there are multiple hypotheses about the pathophysiological mechanisms that lead to the development of T2D, the effects of this pathology on pancreatic β-cells are often ignored. We now know that in addition to genetic defects, β-cell organellar dysfunction participates in the earliest stages of the disease; other factors also contribute to this dysfunction, such as excessive production of reactive oxygen species and a decrease in cellular volume and mass...
2017: Current Diabetes Reviews
https://www.readbyqxmd.com/read/28916632/tissue-sex-and-age-specific-dna-methylation-of-rat-glucocorticoid-receptor-gene-promoter-and-insulin-like-growth-factor-2-imprinting-control-region
#12
Ogechukwu Brenda Agba, Ludwig Lausser, Klaus Huse, Christoph Bergmeier, Niels Jahn, Marco Groth, Martin Bens, Arne Sahm, Maria Gall, Otto W Witte, Hans A Kestler, Matthias Schwab, Matthias Platzer
Tissue-, sex- and age-specific epigenetic modifications such as DNA methylation are largely unknown. Changes in DNA methylation of the glucocorticoid receptor gene (NR3C1) and imprinting control region (ICR) of IGF2 and H19 genes during the lifespan are particularly interesting since these genes are susceptible to epigenetic modifications by prenatal stress or malnutrition. They are important regulators of development and aging. Methylation changes of NR3C1 affect glucocorticoid receptor expression, which is associated with stress sensitivity and stress-related diseases predominantly occurring during aging...
September 15, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/28915325/brown-and-beige-adipose-tissues-in-health-and-disease
#13
Liangyou Rui
Brown and beige adipocytes arise from distinct developmental origins. Brown adipose tissue (BAT) develops embryonically from precursors that also give to skeletal muscle. Beige fat develops postnatally and is highly inducible. Beige fat recruitment is mediated by multiple mechanisms, including de novo beige adipogenesis and white-to-brown adipocyte transdifferentiaiton. Beige precursors reside around vasculatures, and proliferate and differentiate into beige adipocytes. PDGFRα+Ebf2+ precursors are restricted to beige lineage cells, while another PDGFRα+ subset gives rise to beige adipocytes, white adipocytes, or fibrogenic cells...
September 12, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28913935/induction-of-cancer-cell-stemness-by-depletion-of-macrohistone-h2a1-in-hepatocellular-carcinoma
#14
Oriana Lo Re, Caterina Fusilli, Francesca Rappa, Matthias Van Haele, Julien Douet, Jana Pindjakova, Sura Wanessa Rocha, Illar Pata, Barbora Valčíková, Stjepan Uldrijan, Raymond S Yeung, Christina Alves Peixoto, Tania Roskams, Marcus Buschbeck, Tommaso Mazza, Manlio Vinciguerra
Hepatocellular carcinomas (HCC) contain a sub-population of cancer stem cells (CSCs), which exhibit stem-cell like features and are responsible for tumor relapse, metastasis, and chemoresistance. The development of effective treatments for HCC will depend on a molecular-level understanding of the specific pathways driving CSC emergence and stemness. MacroH2A1 is a variant of the histone H2A and an epigenetic regulator of stem cell function, where it promotes differentiation and, conversely, acts as a barrier to somatic cell reprogramming...
September 15, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28910694/an-epidemiologic-perspective-on-the-stem-cell-hypothesis-in-human-carcinogenesis
#15
REVIEW
David Schottenfeld
BACKGROUND: Tomasetti and Vogelstein have hypothesized that the patterns of cancer incidence in various cells and tissues are highly correlated with the estimated lifetime number of stem cell divisions. The authors reviewed the risks in tissues of 17 types of cancer from the United States and 69 additional countries. Positive correlations were observed consistently between the tissue - specific cancer incidence and the estimated lifetime number of stem cell divisions. The authors concluded that approximately two-thirds of global cancer incidence may be attributed to random DNA replication errors...
September 11, 2017: Cancer Epidemiology
https://www.readbyqxmd.com/read/28904640/short-term-dietary-methionine-supplementation-affects-one-carbon-metabolism-and-dna-methylation-in-the-mouse-gut-and-leads-to-altered-microbiome-profiles-barrier-function-gene-expression-and-histomorphology
#16
Isabelle R Miousse, Rupak Pathak, Sarita Garg, Charles M Skinner, Stepan Melnyk, Oleksandra Pavliv, Howard Hendrickson, Reid D Landes, Annie Lumen, Alan J Tackett, Nicolaas E P Deutz, Martin Hauer-Jensen, Igor Koturbash
BACKGROUND: Methionine, a central molecule in one-carbon metabolism, is an essential amino acid required for normal growth and development. Despite its importance to biological systems, methionine is toxic when administered at supra-physiological levels. The aim of this study was to investigate the effects of short-term methionine dietary modulation on the proximal jejunum, the section of the gut specifically responsible for amino acid absorption, in a mouse model. Eight-week-old CBA/J male mice were fed methionine-adequate (MAD; 6...
2017: Genes & Nutrition
https://www.readbyqxmd.com/read/28904069/disturbed-placental-imprinting-in-preeclampsia-leads-to-altered-expression-of-dlx5-a-human-specific-early-trophoblast-marker
#17
Julianna Zadora, Manvendra Singh, Florian Herse, Lukasz Przybyl, Nadine Haase, Michaela Golic, Hong Wa Yung, Berthold Huppertz, Judith E Cartwright, Guy S Whitley, Guro M Johnsen, Giovanni Levi, Annette Isbruch, Herbert Schulz, Friedrich C Luft, Dominik N Müller, Anne C Staff, Laurence D Hurst, Ralf Dechend, Zsuzsanna Izsvák
Background -Preeclampsia (PE) is a complex and common human-specific pregnancy syndrome associated with placental pathology. The human-specificity provides both intellectual and methodological challenges, lacking a robust model system. Given the role of imprinted genes in human placentation and the vulnerability of imprinted genes to loss of imprinting changes, there has been extensive speculation, but no robust evidence, that imprinted genes are involved in PE. Our study aims at investigating whether disturbed imprinting contributes to PE...
September 13, 2017: Circulation
https://www.readbyqxmd.com/read/28903900/genetics-association-study-and-functional-analysis-on-osteoporosis-susceptibility-gene-bdnf
#18
Man Yang, Bing-Jie Lu, Yuan-Yuan Duan, Xiao-Feng Chen, Jian-Gang Ma, Yan Guo
To explore the relationship between brain-derived neurotrophic factor (BDNF) gene and bone mineral density (BMD) in Chinese Han population, we performed association analysis of 14 tag SNPs on BDNF gene with hip/spine BMD in 1300 Han Chinese samples from Shaanxi Province. We found that 8 of the 14 SNPs were significantly associated with hip or spine BMD (P < 0.05). Moreover, the SNP rs16917237 was significantly associated with both hip and spine BMD, with significant Bonferroni correlation (P value 0.05/14 = 0...
August 20, 2017: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/28903324/the-pwwp-domain-of-the-human-oncogene-whsc1l1-nsd3-induces-a-metabolic-shift-toward-fermentation
#19
Germana B Rona, Diego S G Almeida, Anderson S Pinheiro, Elis C A Eleutherio
WHSC1L1/NSD3, one of the most aggressive human oncogenes, has two isoforms derived from alternative splicing. Overexpression of long or short NSD3 is capable of transforming a healthy into a cancer cell. NSD3s, the short isoform, contains only a PWWP domain, a histone methyl-lysine reader involved in epigenetic regulation of gene expression. With the aim of understanding the NSD3s PWWP domain role in tumorigenesis, we used Saccharomyces cerevisiae as an experimental model. We identified the yeast protein Pdp3 that contains a PWWP domain that closely resembles NSD3s PWWP...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28901530/metabolic-orchestration-of-t-lineage-differentiation-and-function
#20
REVIEW
Carmen S Yong, Daouda Mousatpha Abba Moussa, Gaspard Cretenet, Sandrina Kinet, Valérie Dardalhon, Naomi Taylor
T cells are stimulated by the engagement of antigen, cytokine, pathogen and hormone receptors. While research performed over many years has focused on deciphering the molecular components of these pathways, recent data underscore the importance of the metabolic environment in conditioning responses to receptor engagement. The ability of T cells to undergo a massive proliferation and cytokine secretion in response to receptor signals requires alterations to their bioenergetic homeostasis, allowing them to meet new energetic and biosynthetic demands...
September 13, 2017: FEBS Letters
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