scholarly journals Transcriptome and DNA methylation analysis reveals molecular mechanisms underlying intrahepatic cholangiocarcinoma progression

2021 ◽  
Author(s):  
Yuming Peng ◽  
Guohao Meng ◽  
Xinyi Sheng ◽  
Hongqiang Gao
Keyword(s):  
Dna Methylation ◽  
Intrahepatic Cholangiocarcinoma ◽  
Molecular Mechanisms ◽  
Methylation Analysis ◽  
Dna Methylation Analysis

scholarly journals Comprehensive Analysis of Differential Immunocyte Infiltration and Potential ceRNA Networks Involved in the Development of Atrial Fibrillation

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Jiafeng Wu ◽  
Huiming Deng ◽  
Qianghua Chen ◽  
Qiang Wu ◽  
Xiaolong Li ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Dna Methylation ◽  
Left Atrial ◽  
Molecular Mechanisms ◽  
Linear Models ◽  
Core Gene ◽  
Differential Analysis ◽  
Methylation Analysis ◽  
Protein Protein Interaction ◽  
Dna Methylation Analysis

This study is aimed at identifying potential molecular mechanisms and candidate biomarkers in the left atrial regions for the diagnosis and treatment of valvular atrial fibrillation (VAF). Multibioinformatics methods, including linear models for microarray analysis (LIMMA), an SVA algorithm, CIBERSORT immune infiltration, and DNA methylation analysis, were employed. In addition, the protein-protein interaction (PPI) network, Gene Ontology (GO), and molecular pathways of differentially expressed genes (DEGs) or differential methylation regions were constructed. In all, compared with the normal rhythm group, 243 different mRNAs (29 downregulated and 214 upregulated) and 26 different lncRNAs (3 downregulated and 23 upregulated) were detected in the left atrium (LA) of atrial fibrillation (AF) patients, and the neutrophil and CD8+ T cell were infiltrated. Additionally, 199 different methylation sites (107 downregulated and 92 upregulated) were also identified based on DNA methylation analysis. After integration, ELOVL2, CCR2, and WEE1 were detected for differentially methylated and differentially transcribed genes. Among them, WEE1 was also a core gene identified by the competing endogenous RNA (ceRNA) network that included WEE1-KRBOX1-AS1-hsa-miR-17-5p, in VAF left atrial tissue. We combined the DNA methylation and transcriptional expression differential analysis and found that WEE1 (cg13365543) may well be a candidate gene regulated by DNA methylation modification. Moreover, KRBOX1-AS1 and WEE1 can compete endogenously and may mediate myocardial tissue infiltration into CD8+ T cells and participate in the AF process.

scholarly journals P46.03 DNA Methylation Analysis in Smokers and Non-Smokers (Passive and ex-Smokers)

2021 ◽  
Vol 16 (3) ◽  
pp. S490
Author(s):  
D.M. Aguilar-Beltrán ◽  
A.G. Alcázar-Ramos ◽  
A.L. Vega-Rodríguez ◽  
D.G. García-Gutiérrez ◽  
A.D. Bertadillo-Jilote ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Methylation Analysis ◽  
Dna Methylation Analysis

scholarly journals DNA Methylation in Solid Tumors: Functions and Methods of Detection

2021 ◽  
Vol 22 (8) ◽  
pp. 4247
Author(s):  
Andrea Martisova ◽  
Jitka Holcakova ◽  
Nasim Izadi ◽  
Ravery Sebuyoya ◽  
Roman Hrstka ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Solid Tumors ◽  
Epigenetic Modification ◽  
Single Gene ◽  
Restriction Enzymes ◽  
Methylation Analysis ◽  
Cpg Dinucleotides ◽  
Sequencing Technologies ◽  
Genome Level ◽  
Dna Methylation Analysis

DNA methylation, i.e., addition of methyl group to 5′-carbon of cytosine residues in CpG dinucleotides, is an important epigenetic modification regulating gene expression, and thus implied in many cellular processes. Deregulation of DNA methylation is strongly associated with onset of various diseases, including cancer. Here, we review how DNA methylation affects carcinogenesis process and give examples of solid tumors where aberrant DNA methylation is often present. We explain principles of methods developed for DNA methylation analysis at both single gene and whole genome level, based on (i) sodium bisulfite conversion, (ii) methylation-sensitive restriction enzymes, and (iii) interactions of 5-methylcytosine (5mC) with methyl-binding proteins or antibodies against 5mC. In addition to standard methods, we describe recent advances in next generation sequencing technologies applied to DNA methylation analysis, as well as in development of biosensors that represent their cheaper and faster alternatives. Most importantly, we highlight not only advantages, but also disadvantages and challenges of each method.

scholarly journals Ewastools: Infinium Human Methylation BeadChip pipeline for population epigenetics integrated into Galaxy

GigaScience ◽  
2020 ◽  
Vol 9 (5) ◽  
Author(s):  
Katarzyna Murat ◽  
Björn Grüning ◽  
Paulina Wiktoria Poterlowicz ◽  
Gillian Westgate ◽  
Desmond J Tobin ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Association Studies ◽  
Methylation Analysis ◽  
Web Based ◽  
Array Platform ◽  
Complex Evaluation ◽  
The Galaxy ◽  
Population Epigenetics ◽  
Analyse Data ◽  
Dna Methylation Analysis

Abstract Background Infinium Human Methylation BeadChip is an array platform for complex evaluation of DNA methylation at an individual CpG locus in the human genome based on Illumina’s bead technology and is one of the most common techniques used in epigenome-wide association studies. Finding associations between epigenetic variation and phenotype is a significant challenge in biomedical research. The newest version, HumanMethylationEPIC, quantifies the DNA methylation level of 850,000 CpG sites, while the previous versions, HumanMethylation450 and HumanMethylation27, measured >450,000 and 27,000 loci, respectively. Although a number of bioinformatics tools have been developed to analyse this assay, they require some programming skills and experience in order to be usable. Results We have developed a pipeline for the Galaxy platform for those without experience aimed at DNA methylation analysis using the Infinium Human Methylation BeadChip. Our tool is integrated into Galaxy (http://galaxyproject.org), a web-based platform. This allows users to analyse data from the Infinium Human Methylation BeadChip in the easiest possible way. Conclusions The pipeline provides a group of integrated analytical methods wrapped into an easy-to-use interface. Our tool is available from the Galaxy ToolShed, GitHub repository, and also as a Docker image. The aim of this project is to make Infinium Human Methylation BeadChip analysis more flexible and accessible to everyone.

scholarly journals Serial pyrosequencing for quantitative DNA methylation analysis

BioTechniques ◽  
2006 ◽  
Vol 40 (6) ◽  
pp. 721-726 ◽  
Author(s):  
Jörg Tost ◽  
Hafida El abdalaoui ◽  
Ivo Glynne Gut
Keyword(s):  
Dna Methylation ◽  
Methylation Analysis ◽  
Dna Methylation Analysis
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