Preparation of micro-biosensor and its application in monitoringin vivo change of dopamine
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The self-made high sensitivity and selectivity micro-biosensor was applied to monitor the change of dopamine in cerebral nucleus in ratsin vivo. The micro-biosensor was prepared and used to detect dopamine levelin vitro and monitor the dynamic change of dopamine in different cerebral nucleusin vivo. The results showed the lowest concentration of dopamine that could be detected by the biosensor was 32.5 nmol/L. Its positive peak was significantly different from that of AA, 5-HTP and E. The biosensor could keep working for monitoring the dopamine concentration in the cerebral tissue for more than 10 h. It was concluded that the microsensor has high sensitivity and selectivity to dopamine and can be used to dynamically monitor the change of dopaminein vivo.
Key wordsmicrobiosensor dopamine in vivo