An interaction between synapsin and C9orf72 regulates excitatory synapses and is impaired in ALS/FTD

July 23, 2022
Acta Neuropathol
https://pubmed.ncbi.nlm.nih.gov/35876881

This article is currently being updated. View its version on PubMed.

https://pubmed.ncbi.nlm.nih.gov/35876881

Research summary

This study investigates the role of C9orf72 in regulating excitatory synapses and its interaction with synapsin proteins. Using C9orf72 Knockout mice, the researchers demonstrated that loss of C9orf72 leads to a reduction in excitatory synapse number, decreased synapsin levels at synapses, and impaired synaptic vesicle pools. Electrophysiological recordings revealed deficits in excitatory neurotransmission. Additionally, post-mortem analysis of ALS/FTD patient hippocampus showed reduced synapsin levels, suggesting that disruption of the C9orf72-synapsin interaction contributes to disease pathogenesis.

Key outcome of the study

C9orf72 deficiency impairs excitatory synaptic function by disrupting synapsin-mediated synaptic vesicle regulation, contributing to synaptic dysfunction observed in ALS/FTD.

Mouse model

C9orf72 Knockout (KO) mouse model, generated via targeted gene deletion to study the effects of C9orf72 deficiency in vivo.

TARGET:
C9orf72
Chromosome 9 open reading frame 72

Keywords

Amyotrophic lateral sclerosis (ALS), Frontotemporal dementia (FTD), Synaptic dysfunction, C9orf72, Synapsin

Technical specifications

Knockout mouse model, Targeted gene deletion, Synaptic protein interaction studies, Electrophysiological analysis

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