[The proliferative properties and regulators of the mitotic cell cycle of prostate adenocarcinoma]

The authors have made an immunohistochemical determination of Ki-67, topoisomerase IIalpha, cyclins D1, A, and B1, and calculated their indices in 145 acinar adenocarcinomas of the prostate. This tumor is characterized by a wide range of Ki-67 index (from 3 to 90% or more) although 90% of cases are in the range of 5-35%. Other study proliferative markers are distributed in the following descending order: cyclin D1 (1.32 to 63.27%), topoisomerase IIalpha (0.47 to 53.17%), cyclin A (0.46 to 28.09%), and cyclin B1 (0.29 to 9.34%). The indices of the study markers are increased as the Gleason grade is higher. The exception is cyclin D1 that shows high expression in intact and tumor tissues, which is frequently greater than that of Ki-67, and its stable expression independent of the Gleason score.