The Role of DEAF1 in Dendritic and Synaptic Development: Insights Into Neurodevelopmental Disorders

Area of Science:

• Neuroscience
• Molecular Biology
• Developmental Biology

Background:

• DEAF1 is a transcriptional regulator implicated in neurodevelopmental disorders (NDDs).
• Its precise role in neuronal development, particularly in cortical maturation, remains largely uncharacterized.

Purpose of the Study:

• To investigate the function of DEAF1 in cortical development.
• To elucidate DEAF1's role in neuronal architecture, synaptic function, and activity.

Main Methods:

• In vitro analysis of DEAF1-deficient hippocampal neurons.
• In utero electroporation for acute DEAF1 knockdown in mouse cortical neurons.
• Electrophysiological recordings to assess synaptic transmission and neuronal excitability.

Main Results:

• DEAF1 deficiency inhibited dendritic development and arborization in vitro and in vivo.
• DEAF1 knockdown reduced dendritic spine density and impaired both excitatory and inhibitory synaptic transmission.
• Neuronal excitability was significantly reduced in DEAF1-deficient neurons.

Conclusions:

• DEAF1 plays a critical role in the later stages of cortical maturation, specifically in dendritic and synaptic development.
• Dysfunction of DEAF1 impacts neuronal connectivity and activity, contributing to the pathophysiology of NDDs.
• These findings provide novel cellular and functional insights into DEAF1-associated neurodevelopmental disorders.