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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.
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DNAzyme 10-23 - Based Nanomachines for Nucleic Acid Recognition
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Dendrimer-like DNA-based fluorescence nanobarcodes.

Soong Ho Um1, Jong Bum Lee, Sang Yeon Kwon

  • 1Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853-5701, USA.

Nature Protocols
|April 5, 2007
PubMed
Summary

This study introduces a novel DNA nanobarcode system for rapid, sensitive multiplex detection of multiple targets. The platform utilizes dendrimer-like DNA (DL-DNA) and fluorescence ratios for simultaneous pathogen identification.

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Area of Science:

  • Biotechnology
  • Molecular Diagnostics
  • Nanotechnology

Background:

  • Multiplexed detection of multiple target molecules is crucial for clinical diagnostics and environmental analysis.
  • Current methods face challenges in achieving rapid and sensitive simultaneous detection.

Purpose of the Study:

  • To develop a novel fluorescence-tagged nanobarcode system for sensitive and rapid multiplex detection.
  • To utilize a unique dendrimer-like DNA (DL-DNA) structure for this purpose.

Main Methods:

  • Synthesis of multivalent and anisotropic dendrimer-like DNA (DL-DNA).
  • Development of a fluorescence-tagged nanobarcode system using two different fluorescent dyes (green and red) for ratio-based detection.
  • Establishment of monodisperse DL-DNA preparation via solution and solid-phase methods.

Main Results:

  • Demonstrated rapid and sensitive simultaneous detection of multiple pathogens.
  • Achieved detection using ratios of green and red fluorescent dyes labeling different DL-DNAs.
  • Established reliable methods for monodisperse DL-DNA preparation.

Conclusions:

  • The developed nanobarcode system offers a promising platform for multiplexed detection.
  • The technology can be adapted for multiplexed detection of RNA and proteins.
  • The protocol is efficient, completable within 2-5 days.