DNA methylation profiling using HpaII tiny fragment enrichment by ligation-mediated PCR (HELP)

Area of Science:

• Epigenetics
• Genomics
• Molecular Biology

Background:

• Cytosine methylation is a key epigenetic modification influencing gene expression.
• Accurate genome-wide analysis of methylation patterns is crucial for understanding biological processes and disease.
• The HELP (High-throughput Epigenetic Low-throughput) assay is a established method for methylation analysis.

Purpose of the Study:

• To describe the HELP assay for genome-wide cytosine methylation analysis.
• To outline the strengths and weaknesses of the HELP assay.
• To detail the technological transition of the HELP assay from microarray to sequencing-based platforms.

Main Methods:

• Description of the HELP assay methodology.
• Comparative analysis of microarray-based and sequencing-based HELP assay versions.
• Evaluation of assay performance, including strengths and limitations.

Main Results:

• The HELP assay provides genome-wide cytosine methylation data.
• The transition to a sequencing-based foundation enhances the assay's capabilities.
• Specific strengths and weaknesses of both microarray and sequencing approaches are identified.

Conclusions:

• The HELP assay is a valuable tool for epigenomic research.
• The evolution to sequencing technology improves the resolution and scope of methylation analysis.
• Understanding the assay's characteristics is essential for its effective application in biological studies.