Induced long-term potentiation improves synaptic stability and restores network function in ALS motor neurons.

Area of Science:

• Neuroscience
• Neurodegenerative Diseases
• Cellular Biology

Background:

• Amyotrophic Lateral Sclerosis (ALS) is a fatal neurodegenerative disease characterized by motor neuron degeneration.
• Synaptic alterations and network dysfunction are increasingly recognized as early events in ALS pathogenesis.
• The synapse presents a potential therapeutic target for delaying ALS progression.

Purpose of the Study:

• To stabilize synapses and modify structural connectivity in ALS patient-derived motor neuron networks.
• To restore network balance by targeting neuronal excitability and plasticity.

Main Methods:

• Utilized tetraethylammonium (TEA) to block potassium channels and induce chemical long-term potentiation (cLTP).
• Analyzed functional network activity and structural abnormalities in ALS motor neuron networks.
• Performed protein expression assays to investigate molecular pathway restoration.

Main Results:

• TEA treatment partially restored network function, reducing firing rate and bursting in ALS motor neurons.
• Aberrant branching was reduced, and dendritic spines were stabilized following TEA treatment.
• Restoration of dysregulated molecular pathways, including protein synthesis and synapse organization, was observed.

Conclusions:

• Synaptic impairments are linked to functional alterations in ALS.
• Targeting neuronal excitability and plasticity via potassium channel blockade shows therapeutic potential for ALS.
• This study integrates synaptic potentiation, proteomics, and network analysis in human ALS motor neurons.