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Na+/D-glucose cotransporter based bilayer lipid membrane sensor for D-glucose
N Sugao1, M Sugawara, H Minami
1Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Japan.
Analytical Chemistry
|February 15, 1993
Summary
A novel biosensor utilizes a Na+/D-glucose cotransporter embedded in lipid membranes to detect D-glucose. This D-glucose biosensor measures ion current, offering high sensitivity for glucose detection.
Area of Science:
- Biotechnology
- Biosensor Technology
- Membrane Biophysics
Background:
- Biosensors are crucial for detecting biomolecules.
- Amperometric biosensors offer sensitive detection methods.
- Na+/D-glucose cotransporter plays a key role in glucose absorption.
Purpose of the Study:
- To develop a novel amperometric biosensor for D-glucose detection.
- To utilize the Na+/D-glucose cotransporter as a signal-transducing element.
- To investigate the sensor's response to D-glucose and other monosaccharides.
Main Methods:
- Fabrication of bilayer lipid membranes (BLMs) using the folding method.
- Incorporation of purified Na+/D-glucose cotransporter into BLMs via proteoliposomes.
- Measurement of ionic current through the BLM triggered by D-glucose.
Main Results:
- The biosensor demonstrated a response to D-glucose above 10(-9) M.
- The sensor showed selectivity for D-glucose over other monosaccharides, except D-galactose.
- Sensor output was characterized by varying applied potentials, ion concentrations, and inhibitor presence.
Conclusions:
- The Na+/D-glucose cotransporter can be effectively used as a sensory element in biosensors.
- This novel biosensor shows potential for sensitive and selective D-glucose detection.
- Further studies can explore optimization and application of this biosensor technology.