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Updated: Apr 23, 2026

Continuous Fluorescence-Based Endonuclease-Coupled DNA Methylation Assay to Screen for DNA Methyltransferase Inhibitors
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Methylsorb: a simple method for quantifying DNA methylation using DNA-gold affinity interactions.

Abu Ali Ibn Sina1, Laura G Carrascosa, Ramkumar Palanisamy

  • 1Centre for Personalised Nanomedicine, Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland , Corner College and Cooper Roads (Building 75), Brisbane QLD 4072, Australia.

Analytical Chemistry
|September 17, 2014
PubMed
Summary
This summary is machine-generated.

A new method, Methylsorb, detects DNA methylation by measuring DNA base affinity to gold surfaces. This label-free approach offers a simpler, faster alternative to DNA sequencing for epigenetic analysis in research and diagnostics.

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Area of Science:

  • Epigenetics
  • Molecular Biology
  • Biotechnology

Background:

  • DNA methylation analysis is crucial for understanding epigenetic mechanisms in biology and clinical applications.
  • Current DNA sequencing methods for regional DNA methylation are expensive, time-consuming, and tedious.
  • There is a need for simpler, more efficient methods to quantify DNA methylation patterns.

Purpose of the Study:

  • To introduce and validate Methylsorb, a novel, label-free method for detecting regional DNA methylation.
  • To demonstrate the utility of Methylsorb by analyzing methylation in specific gene regions (EN1 and MIR200B) in cancer cell lines.
  • To provide an alternative to DNA sequencing for DNA methylation analysis.

Main Methods:

  • Methylsorb utilizes the differential affinity of DNA bases (A>C≥G>T) to a gold surface.
  • Bisulfite-treated DNA is analyzed by monitoring its relative adsorption onto a gold chip.
  • Surface Plasmon Resonance (SPR) was used for label-free, real-time detection of DNA adsorption and methylation status.

Main Results:

  • Methylsorb successfully detected regional DNA methylation in CpG clusters within the EN1 and MIR200B genes.
  • The method quantified methylation status by measuring changes in relative mass on the gold surface.
  • Data from MCF7 and MDA-MB-231 cells demonstrated the method's ability to differentiate methylation levels.

Conclusions:

  • Methylsorb offers a simple, accurate, and label-free approach for regional DNA methylation detection.
  • The method obviates the need for traditional DNA sequencing, reducing cost and time.
  • Methylsorb has potential for broad applications in biological research and clinical diagnostics.