Abstract
We have developed a novel method to accelerate the fabrication of epithelial cell sheets by controlling oxygen concentration. Rabbit limbal epithelial cells were proliferated efficiently under hypoxia (2% O2) in comparison to those proliferated under normoxia (20% O2), but were not stratified completely under 2% O2. In contrast, corneal limbal epithelial cells cultured under hypoxia were stratified by re-oxygenation after reaching confluence. Histological and immunofluorescence analyses and colony-forming assays showed that it was possible to fabricate the corneal epithelial cell sheets efficiently by controlling the oxygen concentration. These results indicate that this novel method can be a cost-effective tool for fabricating stratified epithelial cell sheets for corneal regenerative medicine.
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