Search for marker proteins to assess blood-brain barrier development.

Area of Science:

• Neuroscience
• Developmental Biology
• Pharmacology

Background:

• The blood-brain barrier (BBB) is crucial for CNS homeostasis and drug delivery.
• Understanding BBB maturation is key for developing effective central nervous system (CNS) therapeutics.
• Previous research established BBB development timelines but lacked detailed molecular insights.

Purpose of the Study:

• To investigate the temporal expression of key BBB proteins during postnatal development.
• To correlate protein expression patterns with BBB tightness and maturation.
• To establish criteria for assessing the developmental stage of BBB microphysiological systems (MPSs).

Main Methods:

• Examined postnatal temporal expression of vascular, tight junction, transporter, and receptor proteins.
• Categorized proteins into five groups based on expression patterns.
• Correlated protein expression with BBB tightness development.

Main Results:

• Identified distinct temporal expression patterns for BBB-associated proteins.
• Grouped proteins into five categories reflecting different stages of BBB maturation.
• Demonstrated that protein expression profiles can indicate BBB developmental stage.

Conclusions:

• BBB maturation is characterized by specific temporal protein expression changes.
• These protein expression patterns serve as biomarkers for BBB development.
• The findings provide a framework for evaluating the maturation of BBB-MPSs for drug discovery.