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Preparation and Structural Evaluation of Epithelial Cell Monolayers in a Physiologically Sized Microfluidic Culture Device

Preparation and Structural Evaluation of Epithelial Cell Monolayers in a Physiologically Sized Microfluidic Culture Device

Published on: July 1, 2022

A Novel Method Using Quantum Dots for Testing the Barrier Function of Cultured Epithelial Cell Sheets.

Thomas J Duncan¹, Koichi Baba², Yoshinori Oie¹

¹Department of Ophthalmology, Osaka University Graduate School of Medicine, Suita, Japan.

Investigative Ophthalmology & Visual Science

|March 5, 2015

Summary

Quantum dots reveal epithelial cell sheet quality. This method assesses tight junction integrity and barrier function, crucial for successful corneal transplantation and repair.

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Last Updated: Apr 16, 2026

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Area of Science:

Ophthalmology
Cell Biology
Nanotechnology

Background:

The corneal epithelium forms a vital ocular barrier.
Cultured epithelial cell sheets are essential for corneal transplantation.
Assessing cell sheet quality is critical for surgical outcomes.

Purpose of the Study:

Develop a novel method for validating cultured epithelial cell sheet quality.
Utilize fluorescent quantum dot nanoparticles for barrier function assessment.
Enhance the reliability of cell sheets for transplantation surgery.

Main Methods:

Cultured human epithelial cell sheets (oral mucosal or corneal limbal) were used.
Cells were incubated in calcium-containing or calcium-depleted media.
Quantum dot penetration was analyzed via confocal microscopy after incubation.

Main Results:

Extracellular calcium removal disrupted tight junctions and barrier function.
Transepithelial electrical resistance decreased significantly.
Quantum dots showed increased penetration into cell sheets lacking calcium.

Conclusions:

The quantum dot method provides reliable data on tight junction functionality.
It offers nanoscale structural insights into cell sheet integrity.
This technique can validate cell sheets for corneal transplantation.