A novel way to go whole-cell in patch-clamp experiments

Area of Science:

• Electrophysiology
• Cell Biology
• Biophysics

Background:

• Conventional patch-clamp techniques require suction to transition from cell-attached to whole-cell recordings.
• This suction can disrupt the gigaseal, potentially leading to lower success rates and compromised data.
• A need exists for improved methods to achieve whole-cell configuration in patch-clamp electrophysiology.

Purpose of the Study:

• To introduce and validate a novel Pushpen patch-clamp electrode for electrophysiological recordings.
• To demonstrate a new method for achieving whole-cell configuration without disrupting the gigaseal.
• To assess the efficacy of the Pushpen operation in recording whole-cell currents.

Main Methods:

• Development of a novel Pushpen patch-clamp electrode featuring a movable W wire with a conical tip.
• Introduction of the 'Pushpen Operation' for controlled protrusion of the W wire to impale the cell membrane.
• Application of the Pushpen operation to transition from cell-attached to whole-cell configuration without suction.
• Recording of whole-cell currents from Chinese Hamster Ovarian (CHO) cells expressing influenza A virus protein A/M2.

Main Results:

• Successful development and implementation of the Pushpen patch-clamp electrode.
• Demonstration that the Pushpen operation enables transition to whole-cell configuration without suction and gigaseal disruption.
• Successful recording of whole-cell currents from CHO cells expressing influenza A virus protein A/M2 using the novel method.

Conclusions:

• The Pushpen patch-clamp electrode offers a novel and potentially more successful method for achieving whole-cell configuration.
• This technique avoids the need for suction, preserving the gigaseal integrity.
• The Pushpen operation represents a significant advancement in patch-clamp electrophysiology, potentially enhancing experimental success rates.