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Methylation of sites CpG in promoter

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https://www.readbyqxmd.com/read/28817493/dna-methylation-of-the-glucocorticoid-receptor-gene-promoter-in-the-placenta-is-associated-with-blood-pressure-regulation-in-human-pregnancy
#1
Sulistyo E Dwi Putra, Christoph Reichetzeder, Martin Meixner, Karsten Liere, Torsten Slowinski, Berthold Hocher
BACKGROUND: Blood pressure (BP) regulation during pregnancy is influenced by hormones of placental origin. It was shown that the glucocorticoid system is altered in hypertensive pregnancy disorders such as preeclampsia. Epigenetic mechanism might influence the activity of genes involved in placental hormone/hormone receptor synthesis/action during pregnancy. METHOD: In the current study, we analyzed the association of 5'-C-phosphate-G-3' (CpG) site methylation of different glucocorticoid receptor gene (NR3C1) promoter regions with BP during pregnancy...
August 16, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28814982/cord-blood-dna-methylation-and-adiposity-measures-in-early-and-mid-childhood
#2
Jacob K Kresovich, Yinan Zheng, Andres Cardenas, Brian T Joyce, Sheryl L Rifas-Shiman, Emily Oken, Matthew W Gillman, Marie-France Hivert, Andrea A Baccarelli, Lifang Hou
BACKGROUND: Excess adiposity in childhood is associated with numerous adverse health outcomes. As this condition is difficult to treat once present, identification of risk early in life can help inform and implement strategies to prevent the onset of the condition. We performed an epigenome-wide association study to prospectively investigate the relationship between cord blood DNA methylation and adiposity measurements in childhood. METHODS: We measured genome-wide DNA methylation from 478 children in cord blood and measured overall and central adiposity via skinfold caliper measurements in early (range 3...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28813025/association-between-promoter-methylation-of-gene-ercc3-and-benzene-hematotoxicity
#3
Min Zheng, Feiliang Lin, Fenxia Hou, Guilan Li, Caiying Zhu, Peiyu Xu, Caihong Xing, Qianfei Wang
Benzene is a primary industrial chemical and a ubiquitous environmental pollutant. ERCC3 is a key player in nucleotide excision repair. Recent studies suggested that site-specific methylation is a possible mechanism of the transcriptional dysregulation by blocking transcription factors binding. We previously found that the average promoter methylation level of ERCC3 was increased in benzene-exposed workers. In order to test whether specific CpG sites of ERCC3 play an important role in benzene-induced epigenetic changes and whether the specific methylation patterns are associated with benzene hematotoxicity, we analyzed the promoter methylation levels of individual CpG sites, transcription factor binding motif and the correlation between aberrant CpG methylation and hematotoxicity in 76 benzene-exposed workers and 24 unexposed controls in China...
August 16, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28807014/epigenetic-reprogramming-converts-human-wharton-s-jelly-mesenchymal-stem-cells-into-functional-cardiomyocytes-by-differential-regulation-of-wnt-mediators
#4
G Bhuvanalakshmi, Frank Arfuso, Alan Prem Kumar, Arun Dharmarajan, Sudha Warrier
BACKGROUND: Lineage commitment of mesenchymal stem cells (MSCs) to cardiac differentiation is controlled by transcription factors that are regulated by epigenetic events, mainly histone deacetylation and promoter DNA methylation. Here, we studied the differentiation of human Wharton's jelly MSCs (WJMSCs) into the cardiomyocyte lineage via epigenetic manipulations. METHODS: We introduced these changes using inhibitors of DNA methyl transferase and histone deacetylase, DC301, DC302, and DC303, in various combinations...
August 14, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28799801/cross-generational-effects-of-alcohol-dependence-in-humans-on-hras-and-tp53-methylation-in-offspring
#5
Shirley Y Hill, Gregory Rompala, Gregg E Homanics, Nicholas Zezza
AIM: We hypothesized that cross-generational effects of alcohol exposure could alter DNA methylation and expression of the HRAS oncogene and TP53 tumor suppressor gene that drive cancer development. METHODS: DNA methylation of the HRAS and TP53 genes was tested in samples from young participants (Mean age of 13.4 years). RESULTS: Controlling for both personal use and maternal use of substances during pregnancy, familial alcohol dependence was associated with hypomethylation of CpG sites in the HRAS promoter region and hypermethylation of the TP53 gene...
August 11, 2017: Epigenomics
https://www.readbyqxmd.com/read/28798419/dna-methylation-of-the-runx2-p1-promoter-mediates-mmp13-transcription-in-chondrocytes
#6
Atsushi Takahashi, María C de Andrés, Ko Hashimoto, Eiji Itoi, Miguel Otero, Mary B Goldring, Richard O C Oreffo
The Runt-related transcription factor 2 (RUNX2) is critical for bone formation as well as chondrocyte maturation. Matrix metalloproteinase (MMP)-13 is a major contributor to cartilage degradation in osteoarthritis (OA). We and others have shown that the abnormal MMP13 gene expression in OA chondrocytes is controlled by changes in the DNA methylation status of specific CpG sites of the proximal promoter, as well as by the actions of different transactivators, including RUNX2. The present study aimed to determine the influence of the methylation status of specific CpG sites in the RUNX2 promoter on RUNX2-driven MMP13 gene expression in OA chondrocytes...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28791728/smoking-is-associated-with-hypermethylation-of-the-apc-1a-promoter-in-colorectal-cancer-the-colocare-study
#7
Timothy M Barrow, Hagen Klett, Reka Toth, Jürgen Böhm, Biljana Gigic, Nina Habermann, Dominique Scherer, Petra Schrotz-King, Stephanie Skender, Clare Abbenhardt-Martin, Lin Zielske, Martin Schneider, Alexis Ulrich, Peter Schirmacher, Esther Herpel, Hermann Brenner, Hauke Busch, Melanie Boerries, Cornelia M Ulrich, Karin B Michels
Smoking tobacco is a known risk factor for the development of colorectal cancer, and for mortality associated with the disease. Smoking has been reported to be associated with changes in DNA methylation in blood and in lung tumour tissues, although there has been scant investigation of how epigenetic factors may be implicated in the increased risk of developing colorectal cancer. To identify epigenetic changes associated with smoking behaviours, we performed epigenome-wide analysis of DNA methylation in colorectal tumours from 36 never smokers, 47 former smokers and 13 active smokers, and adjacent mucosa from 49 never smokers, 64 former smokers and 18 active smokers...
August 9, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28765074/estrogenic-effects-associated-with-bisphenol-a-exposure-in-male-zebrafish-danio-rerio-is-associated-with-changes-of-endogenous-17%C3%AE-estradiol-and-gene-specific-dna-methylation-levels
#8
Fei Zhao, Penghao Wei, Jun Wang, Miao Yu, Xiaona Zhang, Hua Tian, Wei Wang, Shaoguo Ru
The binding affinity of bisphenol A (BPA) to estrogen receptors (ERs) is much lower than that of 17β-estradiol (E2), and whether there are other molecular mechanisms responsible for the estrogenic action of BPA in vivo currently remains unknown. The objective of this study was to explore the potential association between the estrogenic effect induced by bisphenol A in vivo and changes of endogenous E2 and gene specific DNA methylation levels. After a waterborne exposure of male zebrafish to 500, 1000, or 1500μg/L of BPA for 21d, vitellogenin (VTG) concentration in whole body homogenate, plasma E2 and testosterone levels, hepatic ERs mRNA expressions, gonadal cyp19a1a and cyp17a1 mRNA expressions, and methylation levels of hepatic esr1 and gonadal cyp19a1a's promoters were determined...
July 29, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28764974/associations-between-genetic-and-epigenetic-variations-in-cytokine-genes-and-mild-persistent-breast-pain-in-women-following-breast-cancer-surgery
#9
Kimberly E Stephens, Jon D Levine, Bradley E Aouizerat, Steven M Paul, Gary Abrams, Yvette P Conley, Christine Miaskowski
Persistent pain following breast cancer surgery is a significant problem. Both inherited and acquired mechanisms of inflammation appear to play a role in the development and maintenance of persistent pain. In this longitudinal study, growth mixture modeling was used to identify persistent breast pain phenotypes based on pain assessments obtained prior to and monthly for 6months following breast cancer surgery. Associations between the "no pain" and "mild pain" phenotypes and single nucleotide polymorphisms (SNPs) spanning 15 cytokine genes were evaluated...
July 29, 2017: Cytokine
https://www.readbyqxmd.com/read/28756630/dna-methylation-of-th2-lineage-determination-genes-at-birth-is-associated-with-allergic-outcomes-in-childhood
#10
Sheila Barton, Sherry Ngo, Paula Costello, Emma Garratt, Sarah El-Heis, Elie Antoun, Rebecca Clarke-Harris, Robert Murray, Tejal Bhatt, Graham Burdge, Cyrus Cooper, Hazel Inskip, Eline M van der Beek, Allan Sheppard, Keith M Godfrey, Karen A Lillycrop
BACKGROUND: There is now increasing evidence that asthma and atopy originate in part in utero, with disease risk being associated with the altered epigenetic regulation of genes. OBJECTIVE AND METHODS: To determine the relationship between variations in DNA methylation at birth and the development of allergic disease, we examined the methylation status of CpG loci within the promoter regions of Th1/2 lineage commitment genes (GATA3, IL-4, IL-4R, STAT4 and TBET) in umbilical cord DNA at birth in a cohort of infants from the Southampton Women's Survey (n=696) who were later assessed for asthma, atopic eczema and atopy...
July 30, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28754720/tert-promoter-hypermethylation-in-gastrointestinal-cancer-a-potential-stool-biomarker
#11
Li Liu, Cheng Liu, Omid Fotouhi, Yidong Fan, Kun Wang, Chuanyou Xia, Benkang Shi, Guangyong Zhang, Kexin Wang, Feng Kong, Catharina Larsson, Sanyuan Hu, Dawei Xu
BACKGROUND: There is a high demand for noninvasive screening tools for gastrointestinal cancer (GIC) detection, and GIC-specific markers are required for such purposes. It is established that induction of the telomerase reverse transcriptase gene (TERT) coupled with telomerase activation is essential for cancer development/progression and aberrant TERT promoter methylation of specific 5'-C-phosphate-G-3' (CpGs) has been linked to TERT induction in oncogenesis. Here we analyzed TERT promoter methylation in fecal samples from GIC patients and healthy adults and determined its value as a stool biomarker for GIC detection...
July 28, 2017: Oncologist
https://www.readbyqxmd.com/read/28753106/colorectal-adenoma-and-cancer-detection-based-on-altered-methylation-pattern-of-sfrp1-sfrp2-sdc2-and-prima1-in-plasma-samples
#12
Barbara Kinga Barták, Alexandra Kalmár, Bálint Péterfia, Árpád V Patai, Orsolya Galamb, Gábor Valcz, Sándor Spisák, Barnabás Wichmann, Zsófia Brigitta Nagy, Kinga Tóth, Zsolt Tulassay, Péter Igaz, Béla Molnár
Aberrant methylation is one of the most frequent epigenetic alterations that can contribute to tumor formation. Cell-free DNA can originate from tumor tissue; therefore, the evaluation of methylation markers in cell-free DNA can be a promising method for cancer screening. Our aim was to develop a panel of biomarkers with altered methylation along colorectal adenoma-carcinoma sequence in both colonic tissue and plasma. The methylation of selected CpG sites in healthy colonic (n = 15), adenoma (n = 15), and colorectal cancer (n = 15) tissues was analyzed by pyrosequencing...
July 28, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/28751909/simultaneous-methylation-level-assessment-of-hundreds-of-cpg-sites-by-targeted-bisulfite-pcr-sequencing-tbpseq
#13
Kyuheum Jeon, Byungkuk Min, Jung S Park, Yong-Kook Kang
Methylated-DNA sequencing technologies are producing vast amounts of methylome data from cancer samples, from which cancer-associated differentially methylated CpG sites (cDMCs) are continuously identified and filed. The inclusion of as many cDMCs as possible helps improve the accuracy of cancer diagnosis and sometimes identify cancer subtypes. However, the lack of an established method for the analysis of 100s of cDMCs practically impedes their robust use in clinical medicine. Here, we tested the availability of targeted bisulfite-PCR-sequencing (TBPseq) technology for the assessment of methylation levels of a myriad of CpGs scattered over the genome...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28751638/targeted-dna-methylation-in-human-cells-using-engineered-dcas9-methyltransferases
#14
Tina Xiong, Glenna E Meister, Rachael E Workman, Nathaniel C Kato, Michael J Spellberg, Fulya Turker, Winston Timp, Marc Ostermeier, Carl D Novina
Mammalian genomes exhibit complex patterns of gene expression regulated, in part, by DNA methylation. The advent of engineered DNA methyltransferases (MTases) to target DNA methylation to specific sites in the genome will accelerate many areas of biological research. However, targeted MTases require clear design rules to direct site-specific DNA methylation and minimize the unintended effects of off-target DNA methylation. Here we report a targeted MTase composed of an artificially split CpG MTase (sMTase) with one fragment fused to a catalytically-inactive Cas9 (dCas9) that directs the functional assembly of sMTase fragments at the targeted CpG site...
July 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28737436/dna-methylation-in-the-norepinephrine-transporter-gene-promoter-region-is-not-associated-with-depression-and-hypertension
#15
Lin Meng, Dongmei Chen, Fei Pei, Rutai Hui, Yang Zheng, Jingzhou Chen
OBJECTIVE: This study aims to detect the role of DNA methylation in norepinephrine transporter (NET) gene promoter region on the association between depression and hypertension. METHODS: A total of 162 subjects were categorized into four groups based on depression scores and blood pressure. DNA was extracted from peripheral white blood cells and methylation levels of nine CpG sites in NET gene promoter region were investigated by pyrosequencing. RESULTS: For each CpG site and the average value of nine CpG sites, there were no significant differences in DNA methylation of the NET gene promoter between healthy controls and patients with depression or hypertension...
July 24, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28735727/investigation-of-the-role-of-dna-methylation-in-the-expression-of-erbb2-in-human-myocardium
#16
Adolfo Quiñones-Lombraña, Rachael Hageman Blair, Javier G Blanco
The ERBB2 gene encodes a transmembrane tyrosine kinase receptor that belongs to the epidermal growth factor receptor (EGFR) family. ERBB2 plays a pivotal role during heart development and is essential for normal cardiac function, particularly during episodes of cardiac stress. The monoclonal antibody drug trastuzumab is used for the therapy of breast cancers that overexpress ERBB2. The clinical use of trastuzumab is limited by the development of cardiotoxicity in some patients. Inter-individual differences in the expression of ERBB2 in cardiac tissue may impact the risk of cardiotoxicity...
July 20, 2017: Gene
https://www.readbyqxmd.com/read/28733453/a-novel-functional-splice-variant-of-akt3-defined-by-analysis-of-alternative-splice-expression-in-hpv-positive-oropharyngeal-cancers
#17
Theresa Guo, Akihiro Sakai, Bahman Afsari, Michael Considine, Ludmila Danilova, Alexander V Favorov, Srinivasan Yegnasubramanian, Dylan Z Kelley, Emily Flam, Patrick K Ha, Zubair Khan, Sarah J Wheelan, J Silvio Gutkind, Elana J Fertig, Daria A Gaykalova, Joseph Califano
The incidence of HPV-related oropharyngeal squamous cell carcinoma (OPSCC) has increased more than 200% in the past 20 years. Recent genetic sequencing efforts have elucidated relevant genes in head and neck cancer, but HPV-related tumors have consistently shown few DNA mutations. In this study, we sought to analyze alternative splicing events (ASE) that could alter gene function independent of mutations. To identify ASE unique to HPV-related tumors, RNA sequencing was performed on 46 HPV-positive OPSCC and 25 normal tissue samples...
July 21, 2017: Cancer Research
https://www.readbyqxmd.com/read/28733028/bifidobacterium-longum-affects-the-methylation-level-of-forkhead-box-p3-promoter-in-2-4-6-trinitrobenzenesulphonic-acid-induced-colitis-in-rats
#18
Ming Zhang, Lixing Zhou, Shu Zhang, Yang Yang, Lei Xu, Zichun Hua, Xiaoping Zou
Bifidobacterium longum (B. Longum) is a common probiotic colonized in the human gut and against the development of chronic inflammation including inflammatory bowel disease (IBD). But the underlying mechanism remains unknown. The aim of this study was to evaluate the affection of B. longum on the methylation levels of forkhead box P3 (Foxp3) promoter. 2, 4, 6-trinitrobenzenesulphonic acid (TNBS)-induced colitis rat models were treated with B. longum or medium, respectively. The genomic DNA of spleen peripheral blood mononuclear cells (PBMC) cells was extracted...
July 18, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28730461/low-salinity-affects-cellularity-dna-methylation-and-mrna-expression-of-igf1-in-the-liver-of-half-smooth-tongue-sole-cynoglossus-semilaevis
#19
Siping Li, Feng He, Haishen Wen, Jifang Li, Yufeng Si, Mingyuan Liu, Yajuan Huang, Lingcai Meng
Animal growth depends on feedback regulation of hormone levels and environmental conditions. Insulin-like growth factor-1 (Igf1) promotes cell growth and differentiation and represses apoptosis and is highly regulated by the environment. Moreover, animals modify physiological homeostasis under stressful conditions through epigenetics and genetic regulatory mechanisms. Therefore, a comprehensive understanding of the effects of salt on fish growth is needed. In this study, half smooth tongue sole (Cynoglossus semilaevis) were subjected to 15‰ salinity for 0, 7, and 60 days (D) to assess the effects of low salinity on liver cellularity and growth...
July 21, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28723632/potential-link-between-fusobacterium-enrichment-and-dna-methylation-accumulation-in-the-inflammatory-colonic-mucosa-in-ulcerative-colitis
#20
Tomomitsu Tahara, Ichiro Hirata, Naoko Nakano, Sayumi Tahara, Noriyuki Horiguchi, Tomohiko Kawamura, Masaaki Okubo, Takamitsu Ishizuka, Hyuga Yamada, Dai Yoshida, Takafumi Ohmori, Kohei Maeda, Naruomi Komura, Hirokazu Ikuno, Yasutaka Jodai, Toshiaki Kamano, Mitsuo Nagasaka, Yoshihito Nakagawa, Tetsuya Tuskamoto, Makoto Urano, Tomoyuki Shibata, Makoto Kuroda, Naoki Ohmiya
BACKGROUND AND AIM: Fusobacterium enrichment has been associated with colorectal cancer development. Ulcerative colitis (UC) associated tumorigenesis is characterized as high degree of methylation accumulation through continuous colonic inflammation. The aim of this study was to investigate a potential link between Fusobacterium enrichment and DNA methylation accumulation in the inflammatory colonic mucosa in UC. METHODS: In the candidate analysis, inflamed colonic mucosa from 86 UC patients were characterized the methylation status of colorectal a panel of cancer related 24 genes...
June 27, 2017: Oncotarget
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