Third-Generation Sequencing of Epigenetic DNA.

Area of Science:

• Genomics
• Epigenetics
• Molecular Biology

Background:

• Epigenetic modifications, particularly cytosine modifications at the 5 position, are vital for understanding disease and development.
• Determining the spatiotemporal distribution of these epigenetic marks is essential for biological insight.
• Current next-generation sequencing methods often employ harsh chemical treatments that can degrade samples.

Purpose of the Study:

• To review techniques for detecting cytosine modifications using third-generation sequencing platforms.
• To highlight the advantages of third-generation sequencing for genomic analysis, including long reads and coverage of complex regions.
• To discuss methods for enhancing the reliability of epigenetic modification detection on third-generation platforms.

Main Methods:

• Review of existing literature on third-generation sequencing technologies.
• Analysis of chemical and enzymatic derivatization methods for cytosine modification detection.
• Comparison of third-generation sequencing capabilities with next-generation sequencing for epigenetic analysis.

Main Results:

• Third-generation sequencing offers long reads, improving coverage of repetitive and structurally variant genomic regions.
• Direct detection of epigenetic modifications by third-generation platforms is improving but often requires enhancement.
• Chemical or enzymatic derivatization currently provides a convenient method to increase the reliability of cytosine modification detection.

Conclusions:

• Third-generation sequencing holds significant promise for advancing epigenetic research.
• Reliable detection of cytosine modifications is achievable on third-generation platforms, often aided by chemical or enzymatic treatments.
• This review provides an overview of available techniques for cytosine modification detection on third-generation sequencing platforms.