The Short-Term Safety Evaluation of Corneal Crosslinking Agent-Genipin.

Abstract:

BACKGROUND:Genipin (GP) is a safe method for corneal crosslinking, even for very thin corneas. However, there have been no reports on the optimal GP concentration range to use in vivo for corneal crosslinking. OBJECTIVES:To investigate the safety of corneal crosslinking after a 24-h incubation with different concentrations of GP. METHODS:Twenty New Zealand white rabbits were divided into a phosphate-buffered saline (PBS) group, 0.2% GP crosslinking (GP-CXL) group, 0.25% GP-CXL group, and 0.3% GP-CXL group. Before and after surgery, the operated eyes of each group were characterized by confocal microscopy, and corneal buttons were excised for endothelium staining and electron microscopy. RESULTS:The keratocyte structures in each GP group appeared to be similar to those in the PBS group. Through the confocal microscopy, the changes in corneal endothelial cell density also did not significantly differ among groups. There was a significant difference in apoptosis between the 0.3% GP-CXL and PBS groups (p < 0.05) and between the 0.3% GP-CXL and 0.25% GP-CXL groups (p < 0.05), but there were no significant differences between the 0.2 and 0.25% GP-CXL groups compared to the PBS group. Transmission electron microscopy showed endothelial cell damage in the 0.3% GP-CXL group, with minimal endothelial cell damage in the other groups. CONCLUSIONS:Treatment of rabbit corneas with ≤0.25% GP resulted in minimal toxicity to keratocytes and endothelial cells, suggesting that it is a safe crosslinking agent at those concentrations.

journal_name

Ophthalmic Res

journal_title

Ophthalmic research

authors

Song W,Tang Y,Qiao J,Li H,Rong B,Yang S,Wu Y,Yan X

doi

10.1159/000499571

subject

Has Abstract

pub_date

2019-01-01 00:00:00

pages

141-149

issue

3

eissn

0030-3747

issn

1423-0259

pii

000499571

journal_volume

62

pub_type

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