کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2515486 | 1118526 | 2006 | 13 صفحه PDF | دانلود رایگان |
In order to compare the mechanistic properties of the antitumour-active trans platinum complex trans-[PtCl2{Z-HN = C(OMe)Me}(NH3)] (trans-Z) and of the antitumour-inactive isomer of cisplatin trans-[PtCl2(NH3)2] (trans-DDP), the differential processing of the two compounds by SKOV-3 ovarian cancer cells has been investigated. trans-Z and trans-DDP enter cells with the same efficacy, but trans-Z shows a two-fold higher affinity for cellular DNA. The treatment with trans-DDP IC50 determines an initial and transient cytostatic effect, paralleled by a moderate increase of apoptosis and by sequential and reversible arrests in S and G2/M phases of cell-cycle. In contrast, trans-Z IC50 determines an initial cytotoxic effect, a more persistent and marked increase of apoptosis, and a more marked and prolonged arrest in S and G2/M phases of the cell-cycle. Treatment-induced gene expression modifications indicate that phenotypic effects of trans-DDP are driven by an initial and transient up-regulation of some genes related to cell-cycle checkpoint and arrest networks, whereas the more dramatic phenotypic effects of trans-Z are driven by a persistent up-regulation of more numerous genes involved in cell-cycle checkpoint and arrest networks, and in genome stability and DNA repair. Therefore, molecular and cellular events have been identified which are produced by trans-Z but not by trans-DDP, and which likely represent the mechanistic basis of antitumour activity of trans-Z in the SKOV-3 system.
Journal: Biochemical Pharmacology - Volume 72, Issue 3, 28 July 2006, Pages 280–292