Cell type-specific transcriptional programs in mouse prefrontal cortex during adolescence and addiction

Area of Science:

• Neuroscience
• Genomics
• Molecular Biology

Background:

• Coordinated activity in prefrontal cortex (PFC) neuron subtypes is crucial for cognitive functions.
• Specific transcriptional programs in individual PFC neuron subtypes are not well understood.

Purpose of the Study:

• To comprehensively classify PFC neuron subtypes.
• To analyze transcriptional dynamics in each subtype during adolescent development and in response to chronic cocaine addiction.

Main Methods:

• Single-cell RNA sequencing (scRNA-seq) was employed to classify PFC cell subtypes.
• Transcriptional changes were analyzed under natural adolescent development and induced cocaine addiction conditions.

Main Results:

• Adolescent development (P21-P60) induced significant, cell type-specific transcriptional changes, including regulation of genes linked to neuropsychiatric disorders.
• Chronic cocaine addiction caused progressive transcriptional alterations across multiple neuron subtypes, most prominent during prolonged withdrawal.

Conclusions:

• This research provides a foundational understanding of cell type-specific transcriptional dynamics in the PFC during postnatal development.
• The findings illuminate transcriptional shifts relevant to normal PFC function and neuropsychiatric disease states.