title: The effective concentration and exposure time of mitomycin-C for the inhibition of lens epithelial cell proliferation in rabbit eyes.
abstract: The proliferation of residual lens epithelial cells following cataract surgery is assumed to be a major cause of posterior capsular opacification. To assess the efficacy of mitomycin-C in preventing posterior capsular opacification, we determined the effective concentration and exposure time of mitomycin-C in inhibiting rabbit lens epithelial cell proliferation. The fourth-passaged rabbit lens epithelial cells were maintained for one day and then exposed to mitomycin-C for 1, 2, 3, and 5 minutes, respectively. There were 9 different plating concentrations of mitomycin-C with two-fold serial dilution. The maintenance of the phenotypic properties of lens epithelial cells was confirmed by continuous transcription of lambda-crystalline mRNA determined by reverse transcription-polymerase chain reaction and the polymorphism of the restriction fragment. Cell proliferation was assayed with 3H-thymidine incorporation into DNA. The fourth-passaged cells maintained the expression of lambda-crystalline mRNA, suggesting that they are phenotypically authentic lens epithelial cells. The effective concentrations and exposure time of mitomycin-C were 0.1 mg/ml for 1 minute and 2 minutes, and 0.025 mg/ml for 2 minutes. By these results, we postulated that mitomycin-C at relatively short incubation times could be clinically used for prevention of posterior capsular opacification after cataract surgery.
authors.affiliation: Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Y S
authors.initials: YS
authors.lastname: You
authors.forename: S J
authors.initials: SJ
authors.lastname: Lim
authors.forename: H S
authors.initials: HS
authors.lastname: Chung
authors.forename: Y G
authors.initials: YG
authors.lastname: Lee
authors.forename: C Y
authors.initials: CY
authors.lastname: Kim
authors.forename: Y J
authors.initials: YJ
authors.lastname: Hong
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000494:pharmacology*; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D004247:DNA / Q000096:biosynthesis; D004305:Dose-Response Relationship, Drug; D004847:Epithelial Cells / Q000166:cytology / Q000187:drug effects; D007908:Lens, Crystalline / Q000166:cytology / Q000187:drug effects*; D016685:Mitomycin / Q000494:pharmacology*; D011817:Rabbits; D013997:Time Factors
chemical_list: D000903:Antibiotics, Antineoplastic; D016685:Mitomycin; D004247:DNA