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Related Experiment Videos

A universal nucleic acid sequence biosensor with nanomolar detection limits.

Antje J Baeumner1, Jennifer Pretz, Shirley Fang

  • 1Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853-5701, USA. ajb23@cornell.edu

Analytical Chemistry
|February 14, 2004
PubMed
Summary

A novel universal biosensor enables rapid and sensitive detection of specific nucleic acid sequences. This oligonucleotide sandwich hybridization assay offers a versatile tool for quick identification and quantification in various laboratory and field settings.

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Biosensor Technology

Background:

  • Nucleic acid detection is crucial for diagnostics and research.
  • Existing methods can be time-consuming and require specialized equipment.
  • A need exists for rapid, sensitive, and universally adaptable detection systems.

Purpose of the Study:

  • To develop a quantitative universal biosensor for rapid and sensitive detection of specific nucleic acid sequences.
  • To create a versatile platform adaptable to various target sequences without re-optimization.
  • To enable on-site and laboratory-based quantification of nucleic acids.

Main Methods:

  • Development of a biosensor using universal membrane and dye-entrapping liposomal nanovesicles.
  • Utilizing oligonucleotide sandwich hybridization with reporter and capture probes.

Related Experiment Videos

  • Employing streptavidin-biotin binding for immobilization and a portable reflectometer for quantification.

    • Main Results:

    • Achieved rapid assay time (30 min) and high sensitivity (1 nM detection limit).
    • Demonstrated a wide dynamic range (1 nM to 750 nM) for quantification.
    • Validated the universal biosensor with synthetic DNA and amplified RNA from various bacteria and parasites.

    Conclusions:

    • The universal biosensor provides a rapid, sensitive, and adaptable method for nucleic acid detection.
    • It matches or surpasses the performance of specific biosensors.
    • This technology is suitable for diverse applications in laboratories and field testing for nucleic acid quantification.