Tag: DMR

Introduction to DNA Methylation Analysis: From Wet Lab Experiments to Bioinformatics Analysis

Methylation is one of the most classical epigenetic modifications in eukaryotes. DNA methylation regulates gene expression and has important implications in both growth and disease-related research. DNA methylation affects the maturation of germ cells or embryonic cells subject to specific gene expression. It has also been widely studied and applied…

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Long-range phasing of dynamic, tissue-specific and allele-specific regulatory elements

Baylin, S. B. & Jones, P. A. A decade of exploring the cancer epigenome – biological and translational implications. Nat. Rev. Cancer 11, 726–734 (2011). CAS  PubMed  PubMed Central  Article  Google Scholar  Greenberg, M. V. C. & Bourc’his, D. The diverse roles of DNA methylation in mammalian development and disease….

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Single-cell analyses define a continuum of cell state and composition changes in the malignant transformation of polyps to colorectal cancer

Mapping molecular changes across malignant transformation We generated single-cell data for 81 samples collected from eight FAP and seven non-FAP donors (Fig. 1a and Supplementary Tables 1 and 2). For each tissue, we performed matched scATAC-seq and snRNA-seq (10x Genomics). We obtained high-quality single-cell chromatin accessibility profiles for 447,829 cells…

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DMRs, how common are they and how long?

DMRs, how common are they and how long? 1 Hi! Does anyone know how common differentially methylated regions (DMRs) (or just methylated regions) are? Say, in a 10,000bp region how many DMRs can one expect? Also, does anyone know about the distribution of the size/length of DMRs, i.e. how many…

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Placenta has clues for an early diagnosis of ASD

The researchers of the‘UC Davis MIND during their research they used the genomic sequencing to find a DNA methylation signature in the placenta of infants diagnosed with autism. This hallmark has been linked to early fetal neurodevelopment. Thanks to this study, a new human gene linked to fetal brain development…

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The ENmix DNA methylation analysis pipeline for Illumina BeadChip and comparisons with seven other preprocessing pipelines | Clinical Epigenetics

Methylation analysis pipelines The ENmix pipeline performs data preprocessing in a stepwise way, including ENmix background correction [1], RELIC dye bias correction [3], optional inter-array normalization, RCP probe-type bias correction [2], quality control, filtering of low-quality data points, and imputation. ENmix background correction employs a mixture of exponential and truncated…

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How to analyze Infinium Mouse Methylation BeadChip array data?

Hi! I played around with the Illumina mouse demo data and ENmix. The following code worked for me and you should end up with normalized beta values for subsequent limma analysis (or DMR analysis folowing the ENmix vignette). #setwd() #download the Infinium_Mouse_Methylation_v1.0_A1_GS_Manifest_File.csv file from Illumina HP to working directory (=…

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Bioconductor – ramr

DOI: 10.18129/B9.bioc.ramr     Detection of Rare Aberrantly Methylated Regions in Array and NGS Data Bioconductor version: Release (3.13) ramr is an R package for detection of low-frequency aberrant methylation events in large data sets obtained by methylation profiling using array or high-throughput bisulfite sequencing. In addition, package provides functions…

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Using MethylKit with gemBS output files

Using MethylKit with gemBS output files 0 Hi, I was just wondering if anyone is familiar with using gemBS output files for MethylKit such as the ones below *_3_lane_gembs_cpg.bed.gz *_3_lane_gembs_cpg.txt.gz With the following columns Contig Pos0 Pos1 Ref Call Flags Meth non_conv conv support_call total I tried running methylKit but…

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Frontiers | DNA Methylation and RNA-Sequencing Analysis Show Epigenetic Function During Grain Filling in Foxtail Millet (Setaria italica L.)

Introduction Gene expression is not only controlled by DNA sequences but also by epigenetic marks in eukaryotes. DNA methylation as one of the important epigenetic modifications has been demonstrated as closely related to gene expression in biological processes, such as transcriptional activity, developmental regulation, and environmental responses (Maunakea et al.,…

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An epigenetic basis of inbreeding depression in maize

INTRODUCTION Charles R. Darwin documented inbreeding depression as growth disadvantages from self-fertilization compared to outcrossing in many plants (1). Prevailing hypotheses suggest that inbreeding depression results from the exposure of deleterious recessive alleles and/or loss of overdominant alleles due to increased homozygosity (2, 3) or reduced recombination frequency in some…

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Integrated bioinformatics analysis to identify abnormal CC

Introduction In recent years, the morbidity and mortality of colon cancer have increased rapidly, both being ranked fourth worldwide. Although surgery-based comprehensive treatments improve the prognosis of colon cancer, because of the lack of available means for early diagnosis, the mortality level remains high for patients with advanced-stage cancer. The…

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