A slice chamber for intracellular and extracellular recording during continuous perfusion

Area of Science:

• Neuroscience
• Physiology
• Biomedical Engineering

Background:

• Maintaining tissue viability during electrophysiological recordings is crucial.
• Traditional perfusion systems can suffer from instability during media changes.
• Optimized perfusion is essential for accurate intracellular and extracellular recordings from tissue slices.

Purpose of the Study:

• To describe the design of a novel tissue slice perfusion system.
• To demonstrate the system's stability for electrophysiological recordings.
• To highlight features contributing to enhanced tissue viability and experimental control.

Main Methods:

• The system utilizes mini-drips and solenoid valves for rapid, stable media switching.
• A finely-controlled adjustable flow valve ensures uniform flow rates.
• Thermoelectric Peltier assembly maintains constant tissue temperature.
• A filter paper wick manages perfusate removal, preventing slice movement.
• Tissue slices are supported on a net interfacing with a humidified, oxygenated atmosphere.

Main Results:

• The system demonstrates high stability for both intracellular and extracellular recordings.
• Transient flow rate changes are minimized during perfusion media switching.
• Constant tissue temperature is reliably maintained.
• The design facilitates microelectrode placement and supports tissue viability.

Conclusions:

• The described tissue slice perfusion system offers a stable and reliable platform for electrophysiological studies.
• Key design features contribute to improved tissue viability and experimental precision.
• This system is well-suited for applications requiring stable recordings during perfusion media manipulation.