Engineered human blood-brain barrier microfluidic model for vascular permeability analyses.

Area of Science:

• Neuroscience
• Biomedical Engineering
• Cell Biology

Background:

• The blood-brain barrier (BBB) impedes drug delivery to the brain.
• Existing animal models show poor translation to human clinical outcomes.
• There is a critical need for in vitro human BBB models for research and therapeutic development.

Purpose of the Study:

• To develop and validate a self-assembled in vitro human blood-brain barrier (BBB) model.
• To provide a platform for assessing molecular transport across the BBB.
• To facilitate the design of targeted therapies for neurological disorders.

Main Methods:

• Fabrication of microfluidic devices for BBB model self-assembly.
• Co-culture of stem-cell-derived or primary brain endothelial cells with primary brain pericytes and astrocytes.
• Assessment of molecular permeability using established methodologies.
• Analysis of cellular organization, morphology, gene, and protein expression.

Main Results:

• The in vitro BBB model demonstrated relevant cellular organization and morphology.
• Molecular permeability values were consistent with in vivo expectations.
• The model exhibited functional brain endothelial expression profiles.
• The protocol allows for rapid permeability measurements with low reagent consumption.

Conclusions:

• The developed microfluidic BBB model offers a robust platform for studying brain barrier function.
• This model overcomes limitations of traditional 2D assays and animal models.
• It is suitable for widespread adoption in academic and industrial research for neurological disorder therapeutics.