Whole Cell Voltage Clamp
Whole Cell Voltage Clamp - Related Videos
03:56
Whole-Cell Voltage Clamp Recordings from Drosophila Photoreceptors
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2025
The video demonstrates recording electrical activity in the photoreceptor neurons of Drosophila's ommatidium by establishing a whole-cell configuration. It highlights the activation of transient receptor potential channels by light pulses, resulting in measurable quantum bumps.
10:36
Electrophysiological Method for Whole-cell Voltage Clamp Recordings from Drosophila Photoreceptors
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Cited by 3 •
2017
Whole-cell recordings from Drosophila melanogaster photoreceptors enable the measurement of spontaneous dark bumps, quantum bumps, macroscopic responses to light, and current-voltage relationships under various conditions. In combination with D. melanogaster genetic manipulation tools, this method enables the study of the ubiquitous inositol-lipid signaling pathway and its target, the TRP channel.
07:30
Single Cell Measurement of Dopamine Release with Simultaneous Voltage-clamp and Amperometry
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Cited by 1 •
2012
The amperometric technique measures dopamine release from a single cell by detecting the oxidative current produced by spontaneous dopamine oxidization. Simultaneous voltage clamp and amperometry methodology reveal the mechanistic relationship between the overall "activity" of dopamine transporter and the regulatory role of this activity on the reverse transport of dopamine.
02:42
Establishing a Whole-Cell Voltage-Clamp Configuration for Electrophysiological Recordings in Brain Slices
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2025
This video demonstrates positioning a fine-pointed pipette near brain slices, forming a seal with a neuronal cell. Suction breaks the cell membrane, thereby creating a whole-cell patch clamp that enables current measurements for electrophysiology experiments.
10:57
The Xenopus Oocyte Cut-open Vaseline Gap Voltage-clamp Technique With Fluorometry
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Cited by 25 •
2014
The cut-open Vaseline gap approach is used to obtain low noise recordings of ionic and gating currents from voltage-dependent ion channels expressed in Xenopus oocytes with high resolution of fast channel kinetics. With minor modification, voltage clamp fluorometry can be coupled to the cut-open oocyte protocol.
FAQs
Voltage control makes the measured current interpretable under a defined electrical condition. After the membrane potential is set, the amplifier supplies whatever current is needed to keep it there; that compensating current reflects ionic flow across the plasma membrane. This allows investigators to examine membrane conductance and ion-channel activity under a controlled voltage state.
The high-resistance seal is central because it establishes a controlled electrical connection between the glass micropipette and the cell membrane. Suction or a brief electrical pulse then ruptures the membrane patch beneath the pipette tip, providing access to the cell interior. This transition enables the amplifier to control the cell’s membrane potential and record whole-cell currents.
Whole Cell Voltage Clamp can characterize more than a single current response. Its recordings provide information about ion-channel activity, overall membrane conductance, synaptic responses, and mechanisms associated with action potentials. These readouts connect electrical signals at the membrane with cellular behavior, helping investigators determine how channels and membrane properties contribute to biological signaling.
An experiment begins by positioning a glass micropipette against the cell membrane and forming a high-resistance seal. The operator then applies brief suction or an electrical pulse to rupture the patch beneath the tip. Once the pipette accesses the cell interior, the amplifier holds the chosen voltage and records the current required to maintain that condition.
Researchers choose Whole Cell Voltage Clamp when they need information about membrane currents under voltage control. In neuronal studies, it can examine synaptic responses and action-potential mechanisms; in muscle physiology, it helps characterize membrane electrical behavior. The approach also supports studies of sensory transduction and investigations of how drugs affect ionic currents or channel activity.
The resulting current records relate a defined voltage condition to membrane conductance and ionic activity. Investigators can use these measurements to characterize channel behavior, assess synaptic electrical responses, and analyze processes underlying action potentials. Because the recording provides electrical access to the whole cell, it connects plasma-membrane activity with broader physiological questions in biology.