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Methods Mol Biol. 2009;556:117-39. doi: 10.1007/978-1-60327-192-9_9.

Methylation analysis by microarray.

Methods in molecular biology (Clifton, N.J.)

Daniel E Deatherage, Dustin Potter, Pearlly S Yan, Tim H-M Huang, Shili Lin

Affiliations

  1. Human Cancer Genetics Program, The Ohio State University Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA.

PMID: 19488875 PMCID: PMC2838393 DOI: 10.1007/978-1-60327-192-9_9

Abstract

Differential methylation hybridization (DMH) is a high-throughput DNA methylation screening tool that utilizes methylation-sensitive restriction enzymes to profile methylated fragments by hybridizing them to a CpG island microarray. This array contains probes spanning all the 27,800 islands annotated in the UCSC Genome Browser. Herein we describe a DMH protocol with clearly identified quality control points. In this manner, samples that are unlikely to provide good read-outs for differential methylation profiles between the test and the control samples will be identified and repeated with appropriate modifications. The step-by-step laboratory DMH protocol is described. In addition, we provide descriptions regarding DMH data analysis, including image quantification, background correction, and statistical procedures for both exploratory analysis and more formal inferences. Issues regarding quality control are addressed as well.

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