Patch clamp recording from bipolar cells in the wholemount mouse retina

Area of Science:

• Neuroscience
• Retinal Physiology
• Optogenetics

Background:

• Bipolar cells are second-order neurons in the retina.
• Investigating bipolar cell synaptic responses is challenging due to accessibility.
• Optogenetic tools offer new ways to study neuronal function.

Purpose of the Study:

• To develop and detail a protocol for patch-clamp recordings from bipolar cells in whole-mount retinas.
• To enable the examination of light-evoked synaptic responses in individual bipolar cells.
• To facilitate the identification of specific bipolar cell types post-recording.

Main Methods:

• Whole-mount retina preparation from Ai32 mutant mice.
• Whole-cell patch-clamp recording technique applied to bipolar cells.
• Optogenetic stimulation using channelrhodopsin-2 (ChR2) activation.
• Post-recording imaging of recorded cell terminals for cell-type identification.

Main Results:

• Successful implementation of a protocol for patch-clamp recordings from mouse retinal bipolar cells.
• Demonstration of light-evoked responses in bipolar cells via optogenetic stimulation.
• Correlation of electrophysiological data with post-hoc cell-type identification.

Conclusions:

• The presented protocol provides a viable method for studying bipolar cell function in the retina.
• This technique enhances the accessibility of bipolar cells for synaptic response investigation.
• The method aids in understanding retinal circuitry and neuronal function.