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Methylation is a phase II biotransformation process involving the attachment of a methyl group to a substrate. Enzymes known as methyltransferases orchestrate this reaction.
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Related Experiment Video

Updated: Feb 11, 2026

Circulating MicroRNA Quantification Using DNA-binding Dye Chemistry and Droplet Digital PCR
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DNA Methylation Analysis Using Droplet Digital PCR.

Ming Yu1, Tai J Heinzerling2, William M Grady3,4

  • 1Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA. myu@fredhutch.org.

Methods in Molecular Biology (Clifton, N.J.)
|May 3, 2018
PubMed
Summary

Droplet digital PCR (ddPCR) offers precise DNA quantification. This study details methods for detecting methylated DNA using ddPCR, showing its sensitivity for cancer biomarker research.

Keywords:
Colorectal cancerDNA methylationDroplet digital PCRMethyLightMethyLight ddPCRRisk biomarkers

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Droplet digital PCR (ddPCR) is an advanced PCR technique for precise nucleic acid detection and absolute quantification.
  • DNA methylation is crucial in gene regulation and disease, necessitating accurate detection methods.
  • Current methods for detecting methylated DNA can be limited in sensitivity and precision.

Purpose of the Study:

  • To optimize droplet digital PCR (ddPCR) for the detection and quantification of methylated DNA.
  • To provide detailed instructions for performing methylation-specific ddPCR (MethyLight ddPCR).
  • To demonstrate the sensitivity and precision of MethyLight ddPCR using a specific colon cancer biomarker.

Main Methods:

  • Development and optimization of ddPCR assays for methylated DNA detection.
  • Implementation of the MethyLight ddPCR protocol.
  • Validation of the method using the mir342/EVL promoter region in a colon cancer model.
  • Troubleshooting common technical issues in MethyLight ddPCR assays.

Main Results:

  • Established optimized parameters for ddPCR-based methylated DNA detection and quantification.
  • Demonstrated high sensitivity and precision of MethyLight ddPCR for a potential colon cancer biomarker.
  • Provided a comprehensive guide for successful MethyLight ddPCR assay implementation.
  • Identified and addressed common technical challenges in the assay.

Conclusions:

  • MethyLight ddPCR is a sensitive and precise method for quantifying methylated DNA.
  • This technique is valuable for research and clinical diagnostics, particularly for DNA methylation biomarker studies.
  • The study provides practical guidance and troubleshooting for implementing ddPCR in methylation analysis.