Spatiotemporal clonal architecture of the newborn mouse forebrain.

Clonal analysis reveals extensive regional dispersion of GABAergic neurons and region-specific lineage relationships in the newborn mouse forebrain.

• Why it matters: Understanding how diverse cell types develop from limited progenitors is crucial for deciphering brain formation and neurodevelopmental disorders, especially beyond the cerebral cortex.
• What they did: Using lentiviral barcoding and spatial transcriptomics, the study mapped clonal relationships across major forebrain regions in 10-day-old mice, identifying lineage differences and gene expression patterns.
• The result: Findings show GABAergic neurons disperse widely and are linked to oligodendrocyte precursors, while glutamatergic neurons and astrocytes remain regionally confined, providing a reference for forebrain development and disease research.