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Related Concept Videos

DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

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Related Experiment Video

Updated: Jun 14, 2026

Targeted DNA Methylation Analysis by Next-generation Sequencing
08:38

Targeted DNA Methylation Analysis by Next-generation Sequencing

Published on: February 24, 2015

Multiplex detection of CpG methylation using microarray combining with target-selection-padlock probe.

Xiaolong Shi1, Chao Tang, Dequan Zhou

  • 1State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China.

Clinica Chimica Acta; International Journal of Clinical Chemistry
|March 30, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces a novel method using padlock probes and microarray to accurately detect DNA methylation in multiple genes simultaneously. This high-throughput assay improves upon previous limitations for cancer research.

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Area of Science:

  • Molecular Biology
  • Epigenetics
  • Genomics

Background:

  • Microarray and bisulfite-PCR enable DNA methylation detection.
  • Previous methods faced limitations in sample preparation throughput due to difficulties in simultaneous multi-target amplification.

Purpose of the Study:

  • To develop a high-throughput assay for simultaneous DNA methylation detection of multiple genes.
  • To overcome the throughput limitations of existing microarray-based DNA methylation analysis.

Main Methods:

  • Designed target-selection-padlock probes to capture CpG sites from bisulfite-treated DNA.
  • Achieved simultaneous amplification of multiple targets using common primers.
  • Detected methylation status via single base extension (SBE) on an oligonucleotide microarray.

Main Results:

  • Successfully analyzed promoter methylation of 8 tumor suppressor genes in colorectal cancer samples.
  • Demonstrated high specificity and efficiency of target-selection-padlock probes for parallel gene amplification.
  • Achieved accurate and high-throughput DNA methylation detection through combined probe and microarray technology.

Conclusions:

  • Developed a robust and accurate assay for assessing DNA methylation status across multiple genes.
  • This method shows potential for large-scale screening of DNA methylation in cancer cell lines and clinical samples.