The spatiotemporal dynamics of postnatal vascularization in the mouse brain

Area of Science:

• Neuroscience
• Developmental Biology
• Vascular Biology

Background:

• Cerebral vasculature is immature at birth and undergoes extensive postnatal development.
• The integration of vascular growth with neuronal circuit maturation remains poorly understood.

Purpose of the Study:

• To spatiotemporally map postnatal cerebral vascular development.
• To understand the integration of vascularization with brain growth and neuronal maturation.

Main Methods:

• Development of a light-sheet-aligned mouse brain annotated developmental atlas (LAMBADA).
• Registration and annotation of optically cleared developing mouse brains with high temporal resolution.
• Integration with spatial transcriptomics to correlate vascular remodeling with gene expression.

Main Results:

• Identification of three distinct, brain-wide phases of postnatal cerebral vascular development: isometric expansion, regional specialization, and refinement.
• Characterization of transcriptomic signatures associated with each phase.
• Delineation of molecular and structural mechanisms driving vascular remodeling during development.

Conclusions:

• The LAMBADA atlas provides a foundational resource for studying developmental neurovascular interactions.
• This work clarifies the dynamic process of postnatal cerebral vascular development in mice.
• The findings offer insights into the coordinated development of brain vasculature and neuronal circuits.