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Sutureless repair of large-diameter corneal defects using natural polymer-derived photocurable bioadhesive hydrogels

ABSTRACT: The in situ formation of adhesive hydrogels can repair of corneal defects but most focused on repairing focal stromal defects with diameters ≤ 3.5 mm because of their weak adhesion to wet tissues and fast biodegradation rate. Herein, a photocurable bioadhesive hydrogel that mimics the extracellular matrix (ECM) composition is developed for repairing 6-mm-diameter corneal stromal defects in rabbits. This biomacromolecule-based matrix hydrogel can undergo rapid gelling after UV light irradiation, exhibiting a high light transmittance and favorable mechanics. More importantly, this hydrogel maintained the viability and adhesion of cornea-derived cells and promoted their migration in vitro in 2D and 3D culture environments. Furthermore, in a rabbit corneal stromal defect model, the bioadhesive hydrogel could rapidly sealed wet corneal defects, resulting in epithelial wound coverage within 3-4 weeks, thereby contributing to a decrease in scar formation and increase in corneal stromal-neural regeneration during the 6-month follow-up. Thus, this work indicates that the biomacromolecule-based matrix hydrogel displays great potential for the regeneration of large-diameter corneal defects.

ORGANISM(S): Oryctolagus Cuniculus Homo Sapiens

SUBMITTER: Qingjun Zhou

PROVIDER: PXD037052 | iProX | Wed Sep 28 00:00:00 BST 2022

REPOSITORIES: iProX

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