The heterocyclic ruthenium(III) complex KP1019 (FFC14A) causes DNA damage and oxidative stress in colorectal tumor cells

S Kapitza, Michael Jakupec, Maria Uhl, Bernhard Keppler, Brigitte Marian (Korresp. Autor*in)

Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed

Abstract

The Ru(III) complex salt KP1019 induced formation of H2O2 in colorectal tumor cells in a dose-dependent way. It also caused DNA-strand breaks if only weakly doubling tail length to 55.87?3.97 mikroM. Both effects were prevented by 5 mM N-acetylcysteine (NAC) which also reduced cytotoxicity (IC50 55 vs 30 mikroM without NAC). Induction of apoptosis was shown by loss of mitochondrial membrane potential in 63.4?2.1% of the population and by caspase-dependent cleavage of poly-(ADP-ribose)-polymerase (PARP). Both effects were inhibited by NAC which reduced the population with depolarized mitochondrial membranes to 24.1?1.2% and prevented PARP-cleavage indicating a central role oxidative stress in KP1019-induced apoptosis. ? 2005 Elsevier Ireland Ltd. All rights reserved.
OriginalspracheEnglisch
Seiten (von - bis)115-121
Seitenumfang7
FachzeitschriftCancer Letters
Jahrgang226
Ausgabenummer2
PublikationsstatusVeröffentlicht - 2005

ÖFOS 2012

  • 301904 Krebsforschung

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