[Effect of mitomycin C on corneal endothelium cells. In vitro study].

PURPOSE: Mitomycin C is an antibiotic with a demonstrated antiproliferative capacity as an inhibitor of fibroblastic cells proliferation. Its use has been extended in glaucoma surgery. In the present study, we evaluated mitomycin C effect on cell culture monolayer of rabbit corneal endothelium.

METHODS

The source of corneal endothelium for cell culture was New Zealand albino rabbit eyes. Desegregation of cells was carried out with mechanic and enzymatic dissociation from corneal endothelium and Descemet membrane. Culture medium was EMEM. Three treatment groups of plates were exposed to three different concentrations of mitomycin C 2x10(-3) mg/ml, 2x10(-2) mg/ml and 2x10(-1) mg/ml. Control and witness plate groups were also established. The morphometric study was performed through quantitative analysis with a video system connected to the light microscope.

RESULTS

Different morphological changes related with cell size, cytoplasm and dyeing were seen at the morphological study and several degenerative signs were established indicating cellular death and a very decrease of the cellular population. In the groups treated with minimal dose (2x10(-3) mg/ml) and 3 days evolution time, cellular population was 434 cels/mm(2), 7 evolution days group cell density was 300.97cels/mm(2), and at 14 days it was 201.88 cels/mm(2). The percentage of survival in all the groups of treated cells was under 50%.

CONCLUSIONS

Mitomycin C in concentrations and exposure time as used in this study has a potent lethal effect on this cellular type that compromises to a greater or smaller extent their function and integrity.