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JOURNAL ARTICLE
RESEARCH SUPPORT, N.I.H., EXTRAMURAL
RESEARCH SUPPORT, NON-U.S. GOV'T
REVIEW
Monitoring Dynamics of DNA Methylation at Single-Cell Resolution during Development and Disease.
DNA methylation is a broadly studied epigenetic modification that is essential for normal mammalian development. Over the years, numerous methodologies were developed trying to cope with the intrinsic challenge of reading the "second dimension" epigenetic code. The recent rapid expansion of sequencing technologies has made it possible to fully chart the methylation landscape of different cell types at single-base resolution. Surprisingly, accumulating data suggest that, in addition to the massive epigenome remodeling during early development, cell type and tissue specification is associated with high levels of DNA methylation dynamics at distal regulatory elements. However, current methods provide only a static "snapshot" of DNA methylation, thus precluding the study of real-time methylation dynamics during cell fate changes. Here we review the principles of a new approach that enables monitoring loci-specific DNA methylation dynamics at single-cell resolution. We also discuss potential applications and promises for implementing this methodology to study DNA methylation changes during development and disease.
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