Abstract
A novel trinuclear platinum compound with a cis-geometry for terminal metal centres coded as QH1 has been synthesized, characterized and investigated for activity against the human ovarian A2780, A2780cisR and A2780ZD0473R cancer cell lines. The cellular accumulation of platinum, level of platinum-DNA binding and the nature of interaction of the compound with pBR322 plasmid DNA have also been determined. QH1 is found to be more active against the resistant cell lines than the parent cell line, thus indicating that the compound has been able to overcome mechanisms of resistance operating in the A2780cisR and A2780ZD0473R cell lines. The high activity of QH1 is associated with high platinum accumulation and high level of platinum-DNA binding in all the three ovarian cancer cell lines. Provided QH1 has the right toxicity profile and its in vitro activity is matched with sufficient activity in vivo, the compound has the potential for development as a novel platinum-based anticancer drug targeted to the ovarian cancer.
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