Genome-scale DNA methylation mapping of clinical samples at single-nucleotide resolution

H. Gu,C. Bock,T. Mikkelsen,N. Jäger,Zachary D. Smith,E. Tomazou,A. Gnirke,E. Lander,A. Meissner

Published 2010 in Nature Methods

ABSTRACT

Bisulfite sequencing measures absolute levels of DNA methylation at single-nucleotide resolution, providing a robust platform for molecular diagnostics. We optimized bisulfite sequencing for genome-scale analysis of clinical samples: here we outline how restriction digestion targets bisulfite sequencing to hotspots of epigenetic regulation and describe a statistical method for assessing significance of altered DNA methylation patterns. Thirty nanograms of DNA was sufficient for genome-scale analysis and our protocol worked well on formalin-fixed, paraffin-embedded samples.

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