Revealing Low Amplitude Signals of Neuroendocrine Cells through Disordered Silicon Nanowires-Based Microelectrode...

Area of Science:

• Neuroscience
• Cell Biology
• Biophysics

Background:

• Microelectrode arrays (MEAs) are crucial for studying cellular electrical activity.
• Existing MEAs face challenges in recording weak signals from neuroendocrine cells.
• Nanostructured MEAs show promise for enhanced electrophysiological investigations.

Purpose of the Study:

• To develop a MEA capable of recording electrical activity from neuroendocrine cells.
• To investigate the electrical signaling of corticotrope AtT-20 cells.
• To explore the impact of extracellular calcium on neuroendocrine cell communication.

Main Methods:

• Utilized disordered silicon nanowires (SiNWs) to fabricate a novel MEA.
• Integrated the SiNW MEA with a customized acquisition board.
• Recorded electrical signals from AtT-20 cells under varying extracellular calcium concentrations.

Main Results:

• Successfully captured electrical signals from AtT-20 cells, resembling action potentials.
• Observed natural membrane penetration of SiNWs, facilitating signal recording.
• Detected synchronous signaling under high calcium, indicating collective cell behavior.

Conclusions:

• The SiNW MEA technology is effective for recording neuroendocrine cell electrical activity.
• This advancement extends MEA utility to pituitary gland cells, vital for human functions.
• Provides new avenues for studying electrical communication in excitable cells.