Related Experiment Video
Updated: Feb 25, 2026
12:11
Methodology for Accurate Detection of Mitochondrial DNA Methylation
Published on: May 20, 2018
14.0K
Label-free Detection for a DNA Methylation Assay Using Raman Spectroscopy
Jeongho Kim1, Hae Jeong Park2, Jae Hyung Kim1
1Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul 02447, Korea.
Chinese Medical Journal
|August 5, 2017
Summary
Raman spectroscopy offers a sensitive, label-free method for detecting DNA methylation, a key biomarker for cancer. This technique successfully distinguished methylated from non-methylated DNA sequences for diagnostic applications.
Area of Science:
- Biochemistry
- Molecular Biology
- Spectroscopy
Background:
- DNA methylation is a critical biomarker for early cancer detection and treatment.
- Current DNA methylation detection technologies lack the sensitivity required for diagnostic devices.
- Raman spectroscopy is explored as a potential label-free method for sensitive DNA methylation detection.
Purpose of the Study:
- To evaluate the suitability of Raman spectroscopy for label-free detection of methylated DNA.
- To assess the diagnostic potential of Raman spectroscopy in identifying specific gene methylation patterns.
Main Methods:
- Synthesized methylated and non-methylated DNA probes and targets for cadherin 1 (CDH1) and retinoic acid receptor beta (RARB) genes.
- Utilized bisulfite conversion for DNA modification prior to assay.
- Employed Principal Component Analysis with Linear Discriminant Analysis (PCA-DA) to classify probe-target hybridization events.
Main Results:
- PCA-DA successfully classified hybridization data for CDH1 and RARB oligo sets.
- Achieved 92% sensitivity and 100% specificity for CDH1 methylation detection.
- Demonstrated 92% sensitivity and 93% specificity for RARB methylation detection.
Conclusions:
- Raman spectroscopy, combined with discriminant analysis, enables label-free detection of DNA methylation.
- The findings support Raman spectroscopy's potential as a sensitive tool for cancer biomarker detection.
Related Concept Videos
01:20Raman Spectroscopy: Overview
2.0K
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
2.0K
01:26Raman Spectroscopy Instrumentation: Overview
1.4K
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
1.4K