Patch-clamp technique to characterize ion channels in enlarged individual endolysosomes

Area of Science:

• Cell Biology
• Molecular Biology
• Physiology

Background:

• Over 70 ion channels and transporters are found in endosomes and lysosomes.
• Dysfunctional intracellular channels are linked to diseases like lysosomal storage disorders and neurodegenerative conditions.
• These channels are significant targets for future drug development.

Purpose of the Study:

• To present a protocol for implementing a manual patch-clamp technique on endolysosomal compartments.
• To enable detailed electrophysiological characterization of intracellular ion channels.
• To offer an alternative to the planar endolysosomal patch-clamp technique.

Main Methods:

• Detailed protocol for manual patch-clamp on endolysosomes.
• Visually controlled, direct patch-clamp technique.
• Requires basic patch-clamp experience; implementation takes up to 1 week.

Main Results:

• Successful implementation of manual patch-clamp for endolysosomal compartments.
• Enables measurement of channel currents across the endolysosomal membrane.
• Individual experiments completed within 1 hour (excluding organelle enlargement time).

Conclusions:

• The presented manual patch-clamp method facilitates electrophysiological analysis of endolysosomal ion channels.
• This technique addresses the limitations of standard methods for intracellular organelle analysis.
• Provides a valuable tool for investigating disease mechanisms and therapeutic targets related to intracellular ion transport.