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DNA Methylation: Bisulphite Modification and Analysis
Published on: October 21, 2011
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Tracing dynamic changes of DNA methylation at single-cell resolution
Yonatan Stelzer1, Chikdu Shakti Shivalila2, Frank Soldner1
1Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA.
Cell
|September 26, 2015
Summary
Researchers developed a reporter of genomic methylation (RGM) to track dynamic DNA changes. This tool visualizes methylation status in real-time, offering new insights into development and disease.
Area of Science:
- Epigenetics
- Developmental Biology
Background:
- Mammalian DNA methylation is crucial for development but has only been studied statically.
- Existing methods provide limited temporal insights into methylation dynamics.
Purpose of the Study:
- To establish a novel reporter system for monitoring dynamic DNA methylation changes over time.
- To visualize locus-specific DNA methylation dynamics in real-time during cellular transitions.
Main Methods:
- Development of a reporter of genomic methylation (RGM) using a minimal imprinted gene promoter and a fluorescent protein.
- Insertion of RGM near CpG islands to report methylation gain or loss.
- Application of RGM to track endogenous methylation dynamics at regulatory elements like super enhancers.
Main Results:
- RGM successfully reports DNA methylation changes at promoter-associated CpG islands.
- Dynamic methylation changes at pluripotency-specific super enhancers were visualized.
- Correlation between DNA methylation changes and gene transcription was observed during cell differentiation and reprogramming.
Conclusions:
- The reporter of genomic methylation (RGM) enables dynamic monitoring of DNA methylation.
- RGM allows investigation of methylation dynamics at single-cell resolution during development and disease.
- This system provides a powerful tool for studying dynamic epigenetic regulation.
