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Issue 6, 2011
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Cellular uptake and subcellular distribution of ruthenium-based metallodrugs under clinical investigation versus cisplatin

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Abstract

The cellular uptake and subcellular distribution including adduct formation with genomic DNA and uptake into mitochondria of two ruthenium(III)-based drugs in clinical trials, KP1019 and NAMI-A, and cisplatin, was investigated in cisplatin sensitive and resistant A2780 human ovarian carcinoma cells. These data indicate that reduced metal uptake into mitochondria in combination with increased binding towards low molecular weight components involved in detoxification mechanisms is essential for cisplatin resistance. The ruthenium drugs show distinct differences with respect to cisplatin, especially in the cisplatin resistant cells; in comparison to the sensitive cells, KP1019 exhibits higher cytotoxicity and an only slightly changed metabolism of the drug, whereas NAMI-A treatment results in increased intracellular ruthenium levels and a higher number of ruthenium-DNA adducts. In addition, size exclusion-inductively coupled mass spectrometry indicates that adduct formation with high molecular weight components in the particulate and nuclear fractions is crucial for the therapeutic effect of KP1019 in both cisplatin resistant and sensitive cell lines.

Graphical abstract: Cellular uptake and subcellular distribution of ruthenium-based metallodrugs under clinical investigation versus cisplatin

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Publication details

The article was received on 17 Dec 2010, accepted on 23 Feb 2011 and first published on 11 Mar 2011


Article type: Paper
DOI: 10.1039/C0MT00101E
Metallomics, 2011,3, 591-599

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    Cellular uptake and subcellular distribution of ruthenium-based metallodrugs under clinical investigation versus cisplatin

    M. Groessl, O. Zava and P. J. Dyson, Metallomics, 2011, 3, 591
    DOI: 10.1039/C0MT00101E

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