title: Corneal-protective effects of an artificial tear containing sodium hyaluronate and castor oil on a porcine short-term dry eye model.
abstract: The corneal-protective effects of an artificial tear containing sodium hyaluronate (SH) and castor oil (CO) were evaluated on a porcine short-term dry eye model. Fresh porcine eyes with an intact cornea were treated with an artificial tear of saline, SH solution (0.1%, 0.5% or 1%), CO solution (0.5%, 1% or 5%) or a mixture solution containing 0.5% SH and 1% CO and then desiccated for 60, 90 or 180 min. To assess corneal damage, the eyes were stained with methylene blue (MB) or lissamine green (LG). The staining score of MB, absorbance of MB extracted from the cornea and staining density of LG increased significantly with increasing desiccation time in untreated and all artificial tear-treated eyes, although there were no significant differences in staining scores and absorbance of MB between eyes treated continuously with saline and 1% SH-treated ones at 60 and 90 min of desiccation or the mixture-treated eyes at 60 min of desiccation. No significant differences in the staining density of LG were also found between continuous saline-treated eyes and ones desiccated for 60 min and treated with 1% SH and the mixture. Mild cytoplasmic vacuolations were histopathologically observed in the basal and wing cells in eyes desiccated for 60 min and treated with 1% SH and the mixture. The mixture solution containing 0.5% SH and 1% CO has protective effects against corneal desiccation similar to those of 1% SH and would be helpful as an artificial tear.
authors.affiliation: Department of Advanced Clinical Medicine, Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Hasegawa
authors.forename: Hideki
authors.initials: H
authors.lastname: Amako
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Mariko
authors.initials: M
authors.lastname: Tazawa
authors.forename: Yuji
authors.initials: Y
authors.lastname: Sakamoto
mesh_terms: D000818:Animals; D002368:Castor Oil / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D003315:Cornea / Q000187:drug effects*; D015352:Dry Eye Syndromes / Q000188:drug therapy*; D006651:Histocytochemistry / Q000662:veterinary; D006820:Hyaluronic Acid / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D066298:In Vitro Techniques / Q000662:veterinary; D065346:Lubricant Eye Drops / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D018709:Statistics, Nonparametric; D013552:Swine
chemical_list: D065346:Lubricant Eye Drops; D002368:Castor Oil; D006820:Hyaluronic Acid