How is Excitotoxicity Being Modelled in iPSC-Derived Neurons?

Area of Science:

• Neuroscience
• Cell Biology
• Genetics

Background:

• Excitotoxicity is a central pathological mechanism in amyotrophic lateral sclerosis (ALS), driven by environmental factors, neurotransmitter imbalance, or neuronal hyperexcitability.
• Traditional in vitro and in vivo animal models have been crucial for understanding ALS, but human cell-based models offer new avenues for investigation.

Purpose of the Study:

• To review the contribution of induced pluripotent stem cell (iPSC)-based studies to understanding ALS-linked excitotoxicity.
• To highlight novel approaches for inducing excitotoxicity in iPSC-derived neurons to further elucidate pathological pathways.

Main Methods:

• Utilizing induced pluripotent stem cells (iPSCs) for human cell-based modeling of neurodegeneration.
• Employing iPSC differentiation for cell-type specific studies.
• Investigating excitotoxicity through gene editing, chemogenetics, and environmental exposures.
• Analyzing neurotransmitter receptor subunit expression and electrophysiological recordings in iPSC-derived neurons.

Main Results:

• iPSC technology provides human cell-based models amenable to environmental and network-based excitotoxic manipulations.
• These models facilitate the examination of gene-environment interactions in ALS-associated excitotoxicity.
• Understanding neurotransmitter receptor activity in iPSC-derived neurons is critical for interpreting experimental data.

Conclusions:

• iPSC-based research significantly advances the understanding of ALS-linked excitotoxicity.
• Novel methods for inducing excitotoxicity in iPSC models offer promising avenues for future research into neurodegenerative disease mechanisms.