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Updated: Oct 7, 2025
Single Cell Measurement of Dopamine Release with Simultaneous Voltage-clamp and Amperometry
Published on: November 21, 2012
Confined electrochemiluminescence imaging microarray for high-throughput biosensing of single cell-released dopamine
Ningning Wang1, Hang Ao2, Wencheng Xiao2
1State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, PR China; School of Pharmacy, Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Binzhou Medical University, Yantai, 264003, PR China.
A novel confined electrochemiluminescence imaging microarray (CEIM) chip enables high-throughput detection of single cell-secreted dopamine (DA). This method reveals cellular secretion heterogeneity, advancing single-cell analysis.
Area of Science:
- Biomedical Engineering
- Analytical Chemistry
- Cell Biology
Background:
- Accurate quantification of single cell secretions is challenging due to collection difficulties and cellular heterogeneity.
- Existing methods often lack the sensitivity and throughput for analyzing individual cell-secreted molecules.
Purpose of the Study:
- To develop a high-throughput method for quantitative detection of single cell-secreted dopamine (DA).
- To design and validate a confined electrochemiluminescence imaging microarray (CEIM) chip for this purpose.
Main Methods:
- Fabrication of a CEIM chip with microwells functionalized with DA aptamer and coreactant-embedded polymer dots (Pdots).
- Utilizing electrochemiluminescence (ECL) quenching by electrochemical oxidation products of DA for sensitive detection.
- Applying the chip to quantify single cell-released DA under hypoxia stimulation.
Main Results:
- The CEIM chip successfully captured single cells and quantified secreted DA with high sensitivity.
- Demonstrated the chip's ability to reveal heterogeneity in DA secretion among individual cells.
- Validated the method's practicability in a biological context (hypoxia stimulation).
Conclusions:
- The developed CEIM chip offers a powerful tool for high-throughput, sensitive detection of single cell secretions.
- This approach effectively addresses the limitations of previous methods in analyzing cellular secretion heterogeneity.
- The protocol can be extended to quantify other secretions from various single cell types.
