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Updated: May 13, 2026
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Detection of Bacteria Using Fluorogenic DNAzymes
Published on: May 28, 2012
Fluorescent sensor for bacterial recognition.
1National Institute of Laser Enhanced Sciences, Cairo University, Giza, Egypt. rehabamin@niles.edu.eg
Summary
A novel boronic acid sensor, DNSBA, effectively detects bacteria like Escherichia coli. Increased bacterial cells enhance DNSBA fluorescence, enabling rapid bacterial monitoring.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Microbiology
Background:
- Boronic acids are used in non-enzymatic saccharide detection.
- Bacterial membranes contain polysaccharides with diol groups, suitable for boronic acid interaction.
Purpose of the Study:
- To evaluate the efficacy of a boronic acid-based fluorescent sensor for bacterial recognition.
- To determine if DNSBA can be used for rapid bacterial monitoring.
Main Methods:
- Utilized (3-(5-(dimethylamino) naphthalene-1-sulfonamide) phenyl) boronic acid (DNSBA) as a fluorescent sensor.
- Employed a microplate reader to record fluorescence changes in response to bacterial cell numbers.
- Investigated spectral shifts associated with boronic acid-bacterial interactions.
Main Results:
- DNSBA fluorescence intensity increased in a dose-dependent manner with rising bacterial cell counts.
- Bacterial cell proliferation induced spectral shifts in DNSBA, indicating complex formation.
- The sensor demonstrated sensitivity to changes in bacterial populations.
Conclusions:
- DNSBA serves as an efficient fluorescent sensor for bacterial cell monitoring.
- The sensor's response is linked to the interaction between boronic acid and bacterial polysaccharides.
- This method offers a promising approach for rapid bacterial recognition.
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