柔红霉素预防后囊膜混浊的研究

目的研究体外细胞培养中柔红霉素对各类晶体上皮细胞增殖的抑制作用及有效浓度,为后囊膜混浊的药物预防提供新线索。方法传代培养的牛、兔、人晶体上皮细胞经０．５、２．５、５．０、７．５、１０．０μｇ／ｍｌ柔红霉素３７℃孵育１０分钟后,观察细胞生长情况;用药后４８小时,采用Ｇｉｅｍｓａ染色－比色法检测细胞吸光值,并分别求得柔红霉素对三种晶体上皮细胞的半数抑制浓度（ＬＤ５０）。结果柔红霉素对体外培养牛、兔、人晶体上皮细胞的增殖均有显著抑制作用,呈浓度依赖性改变。对于人晶体上皮细胞,０．５μｇ／ｍｌ柔红霉素已有显著抑制效应,７．５μｇ／ｍｌ基本发挥最大作用。牛、兔、人晶体上皮细胞的ＬＤ５０值分别为０．４９、４．３０和４．０６μｇ／ｍｌ。结论柔红霉素低浓度短时间作用能有效抑制体外培养晶体上皮细胞的增殖,通过进一步在体研究,可能成为预防后囊膜混浊的理想药物。

Research of daunomycin as an agent for preventing posterior capsule opacification

OBJECTIVE: To investigate the inhibitory activity and the effective concentration of daunomycin against the proliferation of lens epithelial cells in vitro, and make progress in pharmacological prevention of posterior capsule opacification. METHODS: Cultured bovine, rabbit and human lens epithelial cells were exposed to 0.5, 2.5, 5.0, 7.5 and 10.0 micrograms/ml daunomycin solution for ten minutes. Growth of cells was observed, after 48 hours of exposure, absorbency of the cells was tested by using Giemsa staining and colorimetry, and the median lethal dose (LD50) was calculated respectively. RESULTS: Daunomycin significantly suppressed the proliferation of bovine, rabbit and human lens epithelial cells in vitro, showing dose-dependent manner. Daunomycin can effectively inhibit the proliferation of human lens epithelial cells at the concentration of 0.5 microgram/ml, almost reaching the greatest effect at the concentration of 7.5 micrograms/ml. The calculated LD50 for bovine, rabbit and human lens epithelial cells was 0.49, 4.30 and 4.06 micrograms/ml respectively. CONCLUSION: Short time exposure of daunomycin at low concentration can effectively inhibit the proliferation of lens epithelial cells in vitro, after further research in vivo, daunomycin may possibly become a valuable agent for the prevention of posterior capsule opacification.