Related Experiment Video
Updated: Mar 8, 2026

Dynamic Clamp Methods to Investigate Impaired Neuronal Excitability Associated with Autism
Published on: October 17, 2025
The sorting receptor Rer1 controls Purkinje cell function via voltage gated sodium channels
Christina Valkova1, Lutz Liebmann2, Andreas Krämer1
1Leibniz Institut für Alternsforschung-Fritz Lipmann Institut, 07743 Jena, Germany.
The sorting receptor Rer1 is crucial for Purkinje cell function. Loss of Rer1 impairs voltage-gated sodium channels, leading to age-dependent motor deficits and Purkinje cell degeneration.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Rer1 is a sorting receptor in the early secretory pathway.
- It regulates the assembly and cell surface transport of protein complexes.
Purpose of the Study:
- To investigate the role of Rer1 in Purkinje cells (PCs).
- To determine the impact of Rer1 deletion on cerebellar development and function.
Main Methods:
- Generated PC-specific Rer1-deficient mice.
- Assessed motor function, PC morphology, and electrophysiology.
- Analyzed expression of ion channels in Rer1-deficient brains.
Main Results:
- PC-specific Rer1 loss caused age-dependent motor deficits and PC degeneration.
- Electrophysiology revealed deficits in action potential generation and decreased surface density of voltage-gated sodium channels (Nav).
- Whole-brain Rer1 deletion significantly downregulated Nav1.6 and Nav1.1 channels.
Conclusions:
- Rer1 is essential for the proper assembly and cell surface transport of Nav1.1 and Nav1.6 channels in PCs.
- This function of Rer1 is critical for recurrent firing and motor control.
More Related Videos
09:36Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
Published on: December 22, 2023
09:20Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
Published on: July 5, 2021
Related Concept Videos
Voltage-gated Ion Channels
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several types of...
The Role of Ion Channels in Neuronal Computation
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
Cardiac Action Potential
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
Electrophysiology of Normal Cardiac Rhythm
G-Protein Gated Ion Channels
Sensory...
Mechanically-gated Ion Channels