Introduction

Methylated DNA Immunoprecipitation Sequencing (MeDIP-Seq) and Hydroxymethylated DNA Immunoprecipitation Sequencing (hMeDIP-Seq) are powerful enrichment-based technologies for genome-wide profiling of DNA methylation and hydroxymethylation. These methods enable researchers to investigate epigenetic regulation, identify differentially modified genomic regions, and discover biomarkers associated with development and disease.

At N2Jenomics Lab Pvt. Ltd., we offer both MeDIP-Seq for profiling 5-methylcytosine (5mC) and hMeDIP-Seq for selective analysis of 5-hydroxymethylcytosine (5hmC), allowing comprehensive characterization of multiple cytosine modifications in a single research workflow.

What are MeDIP-Seq and hMeDIP-Seq?

DNA methylation is one of the most important epigenetic modifications regulating gene expression, genome stability, embryonic development, cellular differentiation, and disease progression.

• • MeDIP-Seq uses highly specific antibodies to enrich DNA fragments containing 5-methylcytosine (5mC) before next-generation sequencing, enabling genome-wide identification of methylated regions.
• • hMeDIP-Seq employs antibodies specific to 5-hydroxymethylcytosine (5hmC), allowing selective mapping of hydroxymethylated DNA, an important epigenetic mark involved in gene regulation and cellular development.

Unlike bisulfite-based methods, both technologies are conversion-free, preserving DNA integrity while providing efficient genome-wide enrichment of modified cytosines.

Advantages of MeDIP-Seq & hMeDIP-Seq

• • Genome-wide profiling of 5mC or 5hmC
• • Conversion-free workflow that preserves DNA quality
• • Compatible with low-input DNA samples
• • Cost-effective alternative to whole-genome bisulfite sequencing
• • Suitable for whole-genome or targeted epigenetic studies
• • High sensitivity for detecting methylation-enriched regions
• • Ideal for large-scale biomarker discovery
• • Easily integrated with transcriptomics and other multi-omics analyses

Applications

• Epigenetic Biomarker Discovery

Identify disease-associated methylated and hydroxymethylated regions for diagnostic and prognostic biomarker development.

• Cancer Research

Characterize genome-wide methylation changes involved in tumor initiation, progression, and therapeutic response.

• Gene Regulation Studies

Investigate how DNA methylation and hydroxymethylation influence transcriptional regulation and chromatin organization.

• Developmental Biology

Study dynamic epigenetic modifications during embryogenesis, differentiation, and tissue development.

• Environmental Epigenetics

Evaluate epigenetic responses to environmental stress, nutrition, toxins, and other external factors.

• Comparative Epigenomics

Compare methylation landscapes between normal and diseased tissues or among different biological conditions.

• 5hmC Profiling

Map genome-wide hydroxymethylation patterns to better understand epigenetic regulation during development, aging, and disease.

MeDIP-Seq / hMeDIP-Seq Workflow

Our optimized workflow ensures accurate and reproducible genome-wide methylation profiling.

• Genomic DNA extraction and quality assessment

• DNA fragmentation

• Adapter ligation and library preparation

• Immunoprecipitation using 5mC-specific or 5hmC-specific antibodies

• PCR amplification of enriched DNA

• High-throughput sequencing on Illumina platforms

• Bioinformatics analysis and comprehensive reporting

Sample Requirements

Sample requirements may vary depending on project objectives and library preparation strategy.

Sequencing Specifications

• • MeDIP-Seq or hMeDIP-Seq library preparation
• • Illumina high-throughput sequencing platforms
• • Paired-end 150 bp sequencing
• • Approximately 50 million reads (or ~10 Gb data) per sample
• • ≥80% bases with Q30 or higher
• • Rigorous quality control throughout the workflow

Bioinformatics Analysis

Our comprehensive analysis pipeline includes:

• • Raw data quality assessment
• • Read alignment to the reference genome
• • Genome-wide distribution of enriched regions
• • Peak calling and peak distribution analysis
• • Differential peak analysis
• • Peak annotation and associated gene identification
• • Functional enrichment analysis (GO and KEGG)
• • Comparative methylation analysis between experimental groups
• • Publication-ready figures and comprehensive analysis reports

Deliverables

Upon project completion, you will receive:

• • Raw sequencing data (FASTQ files)
• • Quality control reports
• • Peak files and annotated genomic regions
• • Differential methylation analysis (if applicable)
• • GO and KEGG enrichment analysis
• • Publication-quality visualizations
• • Comprehensive bioinformatics report

Why Choose N2Jenomics Lab Pvt. Ltd.?

• • Comprehensive profiling of both 5mC and 5hmC
• • Advanced Illumina sequencing platforms
• • Conversion-free workflows that preserve DNA integrity
• • Experienced genomics and bioinformatics specialists
• • Customized analysis pipelines tailored to your research goals
• • High-quality data with fast turnaround and dedicated technical support

1. What are the advantages of MeDIP-Seq and hMeDIP-Seq compared with other DNA methylation analysis methods?

MeDIP-Seq and hMeDIP-Seq provide a cost-effective and efficient approach for genome-wide profiling of DNA methylation (5mC) and hydroxymethylation (5hmC) without requiring bisulfite conversion.

Compared with other technologies:

• • WGBS offers single-base resolution but requires greater sequencing depth, higher DNA input, and higher project costs.

• • RRBS focuses primarily on CpG-rich regions, providing limited genome coverage.
• • MBD-Seq and MethylCap-Seq primarily capture CpG methylation and generally require higher amounts of input DNA.

MeDIP-Seq offers several advantages, including:

• • Genome-wide enrichment of methylated DNA regions
• • Low DNA input requirements
• • Cost-effective analysis for large sample cohorts
• • Conversion-free workflow that preserves DNA integrity
• • Compatible with diverse sample types
• hMeDIP-Seq enables specific profiling of 5-hydroxymethylcytosine (5hmC), which cannot be distinguished by conventional bisulfite sequencing

2. What are the sample requirements for MeDIP-Seq and hMeDIP-Seq?

High-quality genomic DNA is essential for successful immunoprecipitation sequencing.

Recommended requirements include:

• • High-quality genomic DNA with minimal degradation
• • Sufficient DNA quantity for library preparation
• • DNA free of RNA and protein contamination
• • Availability of a high-quality reference genome for accurate read alignment and downstream analysis

When a complete reference genome is unavailable, genomes from closely related species or well-assembled draft genomes may also be used, although annotation accuracy may be reduced.

3. Which factors can affect the quality of MeDIP-Seq or hMeDIP-Seq results?

Several experimental factors influence the accuracy and reproducibility of MeDIP-Seq and hMeDIP-Seq data, including:

• • DNA quality and integrity: High-quality, intact DNA improves enrichment efficiency and sequencing performance.
• • Fragmentation consistency: Uniform DNA fragment sizes enhance immunoprecipitation efficiency.
• • Antibody specificity and enrichment efficiency: High-quality antibodies are essential for accurately capturing 5mC or 5hmC-containing DNA fragments.
• • Library preparation and PCR amplification: Optimized amplification minimizes PCR bias and preserves library complexity.
• • Sample handling and contamination control: Careful laboratory practices help prevent contamination and ensure reliable sequencing data.