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A fiber-optic lactate sensor based on bacterial cytoplasmic membranes
S G Ignatov1, J A Ferguson, D R Walt
1State Research Center for Applied Microbiology, Obolensk, Moscow Region, Russia.
Biosensors & Bioelectronics
|March 23, 2001
Summary
A novel fiber-optic biosensor detects lactate using bacterial membranes and an oxygen-sensitive dye. This innovative sensor offers specific lactate detection without interference from other common substances.
Area of Science:
- Biomedical Engineering
- Biosensing Technology
- Biochemistry
Background:
- Lactate detection is crucial in various biomedical applications.
- Existing biosensors face challenges with specificity and interference.
- Bacterial cytoplasmic membranes (CPM) offer a promising biological recognition element.
Purpose of the Study:
- To develop a new fiber-optic biosensor for specific lactate detection.
- To utilize bacterial cytoplasmic membranes (CPM) as the biological recognition element.
- To employ an oxygen-sensitive dye layer as the transducer.
Main Methods:
- Adsorbing CPMs from bacteria with an induced lactate oxidase system onto a cellulose disk.
- Mechanically fixing the disk over an oxygen-sensitive siloxane layer on an optical fiber.
- Utilizing the oxygen consumption from lactate oxidase activity for detection.
Main Results:
- The developed fiber-optic biosensor successfully detected lactate.
- The system demonstrated high specificity, with no interference from glucose, fructose, or glutamic acid.
- The biosensor leverages the oxygen-sensitive dye layer for signal transduction.
Conclusions:
- A novel and effective fiber-optic biosensor for lactate detection has been developed.
- The use of bacterial cytoplasmic membranes (CPM) ensures high specificity.
- This biosensor technology shows potential for various diagnostic and monitoring applications.