Human Cortex Spheroid with a Functional Blood Brain Barrier for High-Throughput Neurotoxicity Screening and Disease...

Area of Science:

• Neuroscience
• Biotechnology
• Cell Biology

Background:

• The blood-brain barrier (BBB) restricts therapeutic access to the brain for neurological diseases.
• Understanding BBB mechanisms is crucial but limited.
• Existing in vitro models often lack the complexity of the human brain microvasculature.

Purpose of the Study:

• To develop a more physiologically relevant in vitro model of the human blood-brain barrier (BBB).
• To create a 3D spheroid model incorporating all major brain cell types.
• To assess the model's utility in studying BBB function and potential applications.

Main Methods:

• Generation of 3D spheroids using neurons, microglia, oligodendrocytes, endothelial cells, and astrocytes.
• Analysis of tight junction and adherens junction protein expression.
• Functional assessment of barrier selectivity using charged molecules (MPTP, MPP+, mercury chloride) and response to hypoxia.

Main Results:

• The 3D spheroid model successfully recapitulates key features of human brain tissue and the BBB.
• Expression of tight junctions, adherens junctions, and cell-specific markers was confirmed.
• The model demonstrated charge selectivity, and junctional protein distribution was affected by hypoxia.

Conclusions:

• The developed 3D spheroid model offers a more comprehensive in vitro representation of the human BBB.
• This model holds significant potential for advancing drug discovery, neurological disease modeling, and toxicity testing.