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A label-free platform for dopamine biosensing.

Jesús Navarro1, Javier Galbán1, Susana de Marcos1

  • 1Analytical Biosensors Group, Analytical Chemistry Department, Faculty of Sciences, Aragón Institute of Nanoscience, University of Zaragoza, 50009-Zaragoza, Spain.

Bioanalysis
|December 16, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces a novel label-free biosensor for monitoring dopamine (DA) using laccase. The platform accurately detects DA and total neurotransmitters, showing potential for urine sample analysis.

Keywords:
dopaminelaccaseoptical biosensor

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Neuroscience

Background:

  • Dopamine (DA) monitoring is crucial for understanding neurological disorders.
  • Existing methods for DA detection can be complex and lack specificity.
  • Development of label-free, sensitive detection platforms is needed.

Purpose of the Study:

  • To develop a label-free platform for dopamine monitoring.
  • To utilize the spectroscopic properties of laccase for neurotransmitter detection.
  • To assess the platform's performance in complex biological matrices.

Main Methods:

  • Immobilization of laccase enzyme in a polyacrylamide film.
  • Development of a label-free biosensor based on spectroscopic properties.
  • Batch mode analysis for neurotransmitter determination.

Main Results:

  • The platform enables label-free dopamine determination from 25 to 250 μM without interference from norepinephrine and epinephrine.
  • A linear range of 100 to 900 μM was achieved with 5.3% RSD.
  • The biosensor demonstrated a film lifetime exceeding 30 measurements and could determine the combined concentration of DA, epinephrine, and norepinephrine.

Conclusions:

  • The developed method allows for the determination of both dopamine and the total concentration of three key neurotransmitters.
  • This label-free biosensor shows promise for dopamine monitoring in biological samples, such as urine.
  • The laccase-based platform offers a sensitive and specific approach for neurotransmitter analysis.