[The relationship between morphological manifestations and cell kinetic changes of human lung cancer cells after exposure to chemotherapeutic agents].

The relationship between morphological manifestations and cell kinetic changes of three lung cancer cell lines after exposure with chemotherapeutic agents was studied. After treatment with Cis-dichloro diammine platinum (II) (CDDP), an increase in cells of G2/M compartment at first, and then of S compartment was observed. As for the morphological manifestation, enlarged nuclear cells were more frequently observed. These cells seemed to be in S-G2/M compartment and to die finally. However a part of cells escaped from complete blockade may show multiple nuclei. Also after treatment with Etoposide (VP-16), an increase of G2/M compartment was observed, and on the morphological manifestation enlarged nuclear cells or double-or multiple-nuclear cells were observed. As these cells seemed to enter into G2/M compartment immediately. Cell destruction was thought to be started earlier compared with other two drugs. After treatment with Peplomycin (PEP), its effects on cell cycle traverse were only minimum accumulation of G2/M compartment in high PEP concentration. However concerning the morphological manifestation, many cells treated with PEP revealed enlarged, double or multiple nuclei. This suggests that morphological manifestation may reflect cytocydal effects more dominantly than cell cycle traverse. Each chemotherapeutic agent influenced the morphological manifestation and the cell kinetics of human lung cancer cells characteristically. It seemed to be important to study these relations in order to estimate the effect of chemotherapeutic agents and the therapeutic efficacy on cancer cells.