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Resident neuroelectrochemical interfacing using carbon nanofiber arrays
Timothy E McKnight1, Anatoli V Melechko, Benjamin L Fletcher
1Monolithic Systems Development Group, Oak Ridge National Laboratory, Molecular Scale Engineering and Nanoscale Technologies Research Group, Oak Ridge, Tennessee 37831-6006, USA. mcknightte@ornl.gov
The Journal of Physical Chemistry. B
|August 4, 2006
Summary
This study introduces carbon nanofiber electrodes for long-term monitoring of cell communication. The novel neuroelectroanalytical platform successfully detects neurotransmitters released by cultured neural cells over weeks.
Area of Science:
- Neuroscience
- Electrochemistry
- Materials Science
Background:
- Intercellular communication in excitable cells is crucial for neural function.
- Long-term monitoring of dynamic neural processes requires stable and sensitive electrode platforms.
- Existing neuroanalytical techniques face limitations in long-term stability and resolution.
Purpose of the Study:
- To develop and characterize a novel carbon nanofiber electrode array for long-term neuroelectroanalytical measurements.
- To assess the platform's responsiveness to neurotransmitters released by cultured excitable cells.
- To investigate the potential for observing quantal neurotransmitter release using this technology.
Main Methods:
- Fabrication of individually addressed, vertically aligned carbon nanofiber electrode arrays.
- Culture of neuronal-like cell lines (PC-12) and primary neurons (embryonic rat hippocampus) on electrode arrays for extended periods (days to weeks).
- Electrochemical characterization of electrode arrays using easily oxidized neurotransmitters (dopamine, norepinephrine, 5-hydroxytyramide).
Main Results:
- The carbon nanofiber electrode arrays demonstrated sustained responsiveness for detecting easily oxidized species released by cultured cells over extended periods.
- Preliminary data indicated the successful observation of quantal release of easily oxidized neurotransmitters.
- The platform maintained its electrochemical sensing capabilities after prolonged cell culture and differentiation.
Conclusions:
- Vertically aligned carbon nanofiber electrode architectures provide a viable platform for long-term neuroelectroanalytical measurements.
- This technology enables the study of dynamic intercellular communication and neurotransmitter release in excitable cells.
- The developed platform shows promise for advancing research in neuroscience and neurodegenerative diseases.
