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Fluorometric broad-range screening of compounds with affinity for nucleic acids
1Pure and Applied Biochemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden.
Analytical Chemistry
|April 15, 2005
Summary
A novel nucleic acid optical bioprobe using TO-PRO-3 (TP3) enables sensitive environmental measurements and drug monitoring. This method offers rapid, high-throughput screening for toxic compounds and pharmaceuticals.
Area of Science:
- Biotechnology
- Analytical Chemistry
- Environmental Science
Background:
- Nucleic acid-based sensors offer potential for detecting various compounds.
- Fluorescent intercalating dyes like TO-PRO-3 (TP3) can be used to monitor DNA interactions.
- Optimizing DNA configuration is crucial for sensor performance.
Purpose of the Study:
- To develop a nucleic acid-based optical bioprobe for environmental monitoring and drug analysis.
- To investigate the influence of DNA configuration and length on fluorescence intensity.
- To establish a rapid, simple, and sensitive detection method.
Main Methods:
- Utilized a fiber-optic capillary fluorescence system.
- Employed the intercalating fluorophore TO-PRO-3 (TP3) with optimized pBR322 plasmid DNA.
- Analyzed toxic aromatic amines, antibiotics, and antitumor drugs.
Main Results:
- Detection of compounds was achieved through a decrease in TP3-DNA complex fluorescence intensity.
- DNA configuration and length significantly impacted fluorescence emission.
- Achieved detection limits in the ppb or submicromolar range, comparable to electrochemical methods.
Conclusions:
- The developed optical bioprobe provides a sensitive and rapid method for analyzing environmental pollutants and drugs.
- The system is suitable for routine screening and high-throughput analysis.
- This approach demonstrates the utility of nucleic acid-based sensors in environmental and clinical applications.