Light-Blocking Nanofiber Membranes Facilitating Physiologically Relevant In Situ Transmigration Assay

Area of Science:

• Biomaterials Science
• Cell Biology
• Drug Discovery

Background:

• Nanofiber (NF) membranes mimic basement membranes, aiding cellular transmigration studies.
• Transparent NF membranes hinder accurate quantification of transmigrated cells due to signal overlap.
• Existing methods face challenges in differentiating live-cell populations post-transmigration.

Purpose of the Study:

• To develop a novel light-blocking nanofiber (LB-NF) membrane for improved cellular transmigration assays.
• To enable precise in situ analysis of transmigrated cells and overcome limitations of transparent membranes.
• To assess the utility of LB-NF membranes in physiological models and pharmaceutical development.

Main Methods:

• Incorporation of carbon black into polycaprolactone nanofibers to create light-blocking (LB-NF) membranes.
• Utilizing LB-NF membranes in transmigration assays with human brain cerebral microvascular endothelial cells (HBEC-5i).
• Evaluating drug testing efficacy within a choroidal neovascularization model using the developed LB-NF membrane.

Main Results:

• The LB-NF membrane successfully mimicked basement membrane biophysical properties.
• Physiologically relevant cell transmigration was achieved with enhanced accuracy in in situ fluorescence detection.
• LB-NF membranes demonstrated effectiveness in drug testing for neovascularization models.

Conclusions:

• The developed LB-NF membrane is a valuable tool for precise assessment of in situ cellular transmigration.
• This technology significantly enhances the accuracy of fluorescence detection in transmigration assays.
• LB-NF membranes hold substantial promise for advancing drug screening and therapeutic development for diseases involving abnormal cell migration.