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Related Experiment Video

Updated: May 29, 2026

Assay Development for High Content Quantification of Sod1 Mutant Protein Aggregate Formation in Living Cells

Assay Development for High Content Quantification of Sod1 Mutant Protein Aggregate Formation in Living Cells

Published on: October 4, 2017

Mutant SOD1 forms ion channel: implications for ALS pathophysiology.

Michael J Allen¹, Jérome J Lacroix, Srinivasan Ramachandran

¹Center for Nanomedicine and Section of Pulmonary/Critical Care, Department of Medicine, The University of Chicago, Chicago, IL, USA.

Neurobiology of Disease

|September 21, 2011

Summary

This summary is machine-generated.

Mutant copper-zinc superoxide dismutase (SOD1) forms toxic ion channels, disrupting cell function in familial amyotrophic lateral sclerosis (FALS). This discovery offers new therapeutic targets for FALS research.

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ALS - Motor Neuron Disease: Mechanism and Development of New Therapies

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ALS - Motor Neuron Disease: Mechanism and Development of New Therapies

ALS - Motor Neuron Disease: Mechanism and Development of New Therapies

Published on: July 29, 2007

Area of Science:

Neuroscience
Biochemistry
Molecular Biology

Background:

Point mutations in copper-zinc superoxide dismutase (SOD1) cause familial amyotrophic lateral sclerosis (FALS).
The exact mechanism of mutant SOD1 toxicity is not fully understood.

Purpose of the Study:

To investigate the structure and function of a specific mutant SOD1 (A4VSOD1).
To elucidate the toxic mechanism underlying mutant SOD1 in FALS.

Main Methods:

Atomic force microscopy (AFM) to visualize A4VSOD1 structure.
Electrophysiology to assess ion channel activity.
Cellular and molecular biology techniques to study cellular effects.

Main Results:

AFM revealed a tetrameric pore-like structure of A4VSOD1 in lipid membranes.
Electrophysiology demonstrated distinct ionic conductances for A4VSOD1, unlike wildtype SOD1.
A4VSOD1 induced membrane depolarization and calcium influx in neuroblastoma cells.

Conclusions:

Mutant SOD1 can form an unregulated ion channel, disrupting cellular homeostasis.
This "toxic channel" mechanism provides a novel therapeutic avenue for FALS research.