Proof-of-Concept Development of a Bioelectric Biosensor Using Arduino for Monitoring Dopaminergic Response in...

Area of Science:

• Neuroscience
• Biomedical Engineering
• Biosensor Technology

Background:

• Real-time monitoring of cellular electrophysiology is crucial for understanding neuronal function.
• Existing methods for neurotransmitter detection can be complex and costly.
• Developing user-friendly, cost-efficient biosensors is essential for advancing neuropharmacological research.

Purpose of the Study:

• To present the proof-of-concept design and preliminary implementation of a bioelectric biosensor.
• To monitor gel-immobilized N2a neuroblastoma cells in real-time using dopamine as a model neurotransmitter.
• To assess the sensor's performance under varying dopamine concentrations and temperatures.

Main Methods:

• Utilized an Arduino platform for a cost-efficient, two-electrode bioelectric recognition assay (BERA) setup.
• Immobilized N2a neuroblastoma cells in a gel matrix to mimic in vivo conditions.
• Measured cellular ohmic resistance in response to increasing dopamine concentrations at 24 °C and 37 °C.

Main Results:

• Demonstrated that temperature significantly influences cellular electrophysiological responses to dopamine.
• Observed changes in cell electric resistance correlated with dopamine concentration and temperature.
• Identified temperature-dependent alterations in dopamine diffusion and cell membrane polarization as potential mechanisms.

Conclusions:

• The developed bioelectric biosensor shows promise for real-time cellular monitoring.
• Temperature is a critical factor affecting neuroblastoma cell responses to dopamine.
• Further optimization is needed for specificity, selectivity, and sensitivity for broader bioscreening and neuropharmacological applications.