The apoptosis of lens epithelial cells (LECs) induced by ultraviolet and the expression of P53 were investigated. Wistar rats received 100 mW/m 2 ultraviolet irradiation (UVR) (λ=280 nm-315 nm) for 15 min. One, 6, 24 h after irradiation the lens capsules were dissected. The percentages of apoptotic cells were evaluated by the TdT-dUTP terminal nick-end labeling (TUNEL) technique and the expression of P53 was detected by using immunohistochemical assay. The results showed that the percentages of TUNEL-positive nuclei at 24 h after irradiation was significantly higher than in the control group and those 1 h, 6 h after irradiation. The percentages of P53-positive cells at 6 h, 24 h after irradiation were significantly higher than in the control group and those 1 h after irradiation. It was concluded that UVR could induce the apoptosis of lens epithelial cell. The expression of P53 might be responsible for the apoptosis of lens epithelial cells.
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