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Time-resolved fluorescence biosensor for adenosine detection based on home-made europium complexes
Da-Wei Huang1, Cheng-Gang Niu, Guang-Ming Zeng
1College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China.
Biosensors & Bioelectronics
|September 13, 2011
Summary
This study presents a novel time-resolved fluorescence biosensor for sensitive adenosine detection. The aptamer-based sensor utilizes europium complexes, achieving a low detection limit of 5.61 nM.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Materials Science
Background:
- Small molecule detection is crucial in various fields.
- Existing fluorescence methods often suffer from background noise.
- Aptamer-based biosensors offer high specificity and sensitivity.
Purpose of the Study:
- To develop a time-resolved fluorescence biosensor for sensitive small molecule detection.
- To utilize europium complexes for enhanced signal-to-noise ratio.
- To demonstrate adenosine detection as a model analyte.
Main Methods:
- Fabrication of a biosensor using europium complexes and aptamer probes immobilized on a glass slide.
- Employing time-resolved fluorescence measurements to minimize background interference.
- Utilizing aptamer structure-switching triggered by adenosine binding.
Main Results:
- The biosensor achieved a low detection limit of 5.61 nM for adenosine.
- A linear detection range from 1.0×10⁻⁸ M to 1.0×10⁻⁷ M was established.
- The biosensor demonstrated excellent selectivity for adenosine detection.
Conclusions:
- The developed time-resolved fluorescence biosensor offers a highly sensitive and selective method for adenosine detection.
- The use of europium complexes and aptamer-based structure-switching is effective for small molecule sensing.
- This approach holds significant potential for aptamer-based analyte detection applications.
