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Related Concept Videos

Labeling DNA Probes03:31

Labeling DNA Probes

DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...

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Using Modified Synthetic Oligonucleotides to Assay Nucleic Acid-Metabolizing Enzymes
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Surface-enhanced Raman scattering based ligase detection reaction.

Yun Suk Huh1, Adam J Lowe, Aaron D Strickland

  • 1Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853, USA.

Journal of the American Chemical Society
|February 10, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces a novel surface-enhanced Raman scattering (SERS) method for detecting single nucleotide polymorphisms (SNPs). This technique enhances SNP detection for applications like personalized medicine by avoiding spectral overlap.

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Area of Science:

  • Genomics and Molecular Biology
  • Biotechnology and Bioanalytical Chemistry

Background:

  • Single nucleotide polymorphisms (SNPs) are key genetic variations linked to numerous diseases, including cancer.
  • Accurate and high-throughput SNP screening is crucial for advancing personalized medicine and understanding disease mechanisms.

Purpose of the Study:

  • To develop a novel SNP detection method combining surface-enhanced Raman scattering (SERS) with the ligase detection reaction (LDR).
  • To overcome limitations of existing SNP detection systems, particularly spectral overlap in multiplexed reactions.

Main Methods:

  • Utilized a ligase detection reaction (LDR) with primers designed to interrogate specific SNPs.
  • Incorporated a Raman enhancer and a reporter dye into LDR primers; ligation brings them into proximity for SERS detection.
  • Implemented the LDR-SERS reaction within an electrokinetically active microfluidic device for enhanced sensitivity and quantization.

Main Results:

  • Successfully demonstrated LDR-SERS for detecting point mutations in the human K-ras oncogene.
  • Achieved a limit of detection as low as 20 pM for target DNA.
  • The SERS detection method avoids spectral overlap, enabling higher parallelization potential compared to fluorescence-based methods.

Conclusions:

  • The LDR-SERS approach offers a sensitive and specific method for SNP detection.
  • This technique holds promise for applications in personalized medicine and genetic diagnostics.
  • The integration with microfluidic devices further enhances detection capabilities.