Retinal Microvasculature-on-a-Chip for Modeling VEGF-Induced Permeability.

Area of Science:

• Ophthalmology
• Vascular Biology
• Biomedical Engineering

Background:

• Retinal microvasculature models are crucial for understanding disease mediators and evaluating drug efficacy.
• Existing models may not fully capture the complexity of retinal barrier dysfunction.
• In vitro systems are needed to screen early drug candidates for retinal diseases.

Purpose of the Study:

• To describe an organ-on-a-chip model of the human retinal microvasculature.
• To enable facile quantification of barrier permeability in response to leakage mediators like VEGF.
• To facilitate the screening of inhibitors for VEGF-induced permeability.

Main Methods:

• Development of an organ-on-a-chip system mimicking the retinal microvasculature.
• Quantification of barrier permeability using leakage mediators (e.g., VEGF).
• Automated confocal imaging to assess endothelial tube morphology for barrier integrity.

Main Results:

• The organ-on-a-chip model allows for effective quantification of retinal barrier permeability.
• The model successfully screens for inhibitors of VEGF-induced permeability.
• Automated imaging provides an additional, reliable measure of barrier integrity.

Conclusions:

• The described organ-on-a-chip model serves as a valuable tool for studying retinal barrier dysfunction.
• This model facilitates the assessment of early drug candidates targeting retinal vascular diseases.
• The integrated imaging method enhances the evaluation of endothelial barrier integrity.