Combined Transcriptomic and Proteomic Profiling Uncovers Developmental Dynamics of Autophagy in the Cortex.

Area of Science:

• Neuroscience
• Cell Biology
• Molecular Biology

Background:

• Autophagy is crucial for neuronal homeostasis, clearing cellular waste in post-mitotic neurons.
• Autophagy is increasingly recognized for its role in early brain development and neuronal circuit formation.
• The developmental regulation of autophagy and its synaptic machinery is poorly understood.

Purpose of the Study:

• To characterize the developmental changes in autophagy-lysosomal genes during cortical maturation.
• To identify autophagy-related proteins present at synapses during brain development.

Main Methods:

• Genome-wide transcriptomic analysis of cortical brain regions across developmental stages.
• Proteomic analysis of isolated synaptosomes to identify synaptic autophagy proteins.

Main Results:

• Transcriptomic data showed stage-dependent regulation of autophagy-lysosomal genes during cortical development.
• Proteomic analysis identified numerous autophagy-associated proteins enriched at synaptic sites.
• These findings indicate the presence of autophagic machinery components at synapses.

Conclusions:

• Autophagy gene expression and synaptic protein composition are developmentally regulated in the brain.
• Synaptic autophagy likely contributes to neuronal circuit maturation and synaptic remodeling.
• Understanding these mechanisms could reveal therapeutic targets for neurological disorders.