The effects of sub-solar levels of UV-A and UV-B on rabbit corneal and lens epithelial cells. Exp Eye Res 2004 May;78(5):1007-14
Date
03/31/2004Pubmed ID
15051481DOI
10.1016/j.exer.2003.12.011Scopus ID
2-s2.0-1642486599 (requires institutional sign-in at Scopus site) 56 CitationsAbstract
The purpose of this work was to establish whether exposing cultured rabbit corneal and lens epithelial cells to ultraviolet radiation equivalent to several hours under the sun would damage the cells. Confluent rabbit corneal epithelial cells were irradiated with broadband UV-A or UV-B, and confluent lens epithelial cells were irradiated with broadband UV-A. The maximum dose of UV-A was 6.3 J cm(-2) and that of UV-B was 0.60 J cm(-2). Damage to corneal epithelial cell was studied using the terminal deoxynucleotidyl transferase mediated dUTP-X nick end labeling (TUNEL) assay and damage to lens epithelial cell was studied using the single cell gel electrophoresis (comet) assay and trypan blue exclusion assay. Lipid peroxidation was assayed using the thiobarbituric acid reaction. Both UV-B and UV-A induced cell death in corneal epithelial cells with different latent periods. UV-A damage included cell death, decreased viability and increased lipid peroxidation of lens epithelial cell. In addition, UV irradiation of the corneal and lens epithelial cells decreased the activity of catalase to thirty to fifty percent of its original value, while the activities of glutathione peroxidase and superoxide dismutase did not decrease within experimental error. Thus, even sub-solar UV radiation can cause irreversible damage to corneal and lens epithelial cells.
Author List
Rogers CS, Chan LM, Sims YS, Byrd KD, Hinton DL, Twining SSAuthor
Sally S. Twining PhD Assistant Dean, Professor in the Biochemistry department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AnimalsCatalase
Cell Death
Cells, Cultured
Dose-Response Relationship, Radiation
Epithelial Cells
Epithelium, Corneal
Lens Capsule, Crystalline
Lipid Peroxidation
Rabbits
Ultraviolet Rays