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Multi-analyte single-membrane biosensor for the serotype-specific detection of Dengue virus
Natalya V Zaytseva1, Richard A Montagna, Eun Mi Lee
1Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853-5701, USA.
Analytical and Bioanalytical Chemistry
|September 15, 2004
Summary
A novel multi-analyte biosensor enables rapid, serotype-specific Dengue virus detection within 25 minutes using nucleic acid hybridization and liposome amplification. This Dengue detection tool offers high reliability and portability for clinical diagnostics.
Area of Science:
- Biomedical Engineering
- Molecular Biology
- Virology
Background:
- Dengue virus poses a significant global health threat, necessitating rapid and accurate diagnostic tools.
- Current Dengue virus detection methods can be time-consuming, expensive, or require specialized laboratory equipment.
- Serotype-specific identification is crucial for effective Dengue virus management and epidemiological surveillance.
Purpose of the Study:
- To develop a rapid, multi-analyte biosensor for simultaneous, serotype-specific detection of Dengue virus.
- To enhance Dengue virus detection sensitivity and specificity using nucleic acid hybridization and liposome signal amplification.
- To create a portable, cost-effective, and user-friendly diagnostic tool for Dengue virus identification.
Main Methods:
- Development of a multi-analyte biosensor integrating generic and serotype-specific DNA probes with dye-entrapping liposomes.
- Utilizing isothermal nucleic acid sequence based amplification (NASBA) for Dengue virus RNA amplification.
- Immobilization of probes on a polyethersulfone membrane strip for capture zone formation and detection via a portable reflectometer.
Main Results:
- The biosensor achieved Dengue virus serotype determination with 92% reliability.
- Detection limits ranged from 50 RNA molecules (serotype 2) to 50,000 molecules (serotype 1) after isothermal amplification.
- The system demonstrated reduced cross-reactivity, enabling simultaneous detection of up to two Dengue virus serotypes and identification of concurrent infections.
Conclusions:
- The developed multi-analyte biosensor offers a rapid, sensitive, and specific alternative for Dengue virus serotype detection.
- The portable and cost-effective nature of the biosensor makes it suitable for widespread clinical application and field use.
- This innovative diagnostic approach significantly improves upon existing methods for Dengue virus identification and management.