sciMET-cap: high-throughput single-cell methylation analysis with a reduced sequencing burden.

Area of Science:

• Epigenetics
• Genomics
• Molecular Biology

Background:

• DNA methylation is crucial for mammalian epigenome regulation in development and disease.
• High-throughput single-cell DNA methylation assays (sciMET) are powerful but require significant sequencing.
• The high sequencing burden limits scalability for genome-wide DNA methylation studies.

Purpose of the Study:

• To develop a targeted enrichment method (sciMET-cap) for single-cell DNA methylation analysis.
• To reduce the sequencing reads required per cell while retaining informative data.
• To enable efficient cell type assignment and differential methylation analysis.

Main Methods:

• Leveraging target enrichment with the sciMET assay.
• Capturing sufficient single-cell DNA methylation information with reduced sequencing.
• Analyzing accumulated off-target coverage for downstream analyses.

Main Results:

• sciMET-cap significantly reduces the sequencing burden per cell.
• The method allows for accurate cell type assignment.
• Genome-wide differentially methylated region calling is achievable for cell clusters as small as 115 cells.

Conclusions:

• sciMET-cap offers a more scalable and cost-effective approach to single-cell DNA methylation analysis.
• This technique facilitates robust epigenomic studies in complex biological systems.
• The method was successfully characterized on human peripheral blood mononuclear cells (PBMCs) and brain tissue.