Organometallic Osmium Arene Complexes with Potent Cancer Cell Cytotoxicity
- 26 October 2010
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of Medicinal Chemistry
- Vol. 53 (22) , 8192-8196
Abstract
Iodido osmium(II) complexes [Os(η6-arene)(XY)I]+ (XY = p-hydroxy or p-dimethylaminophenylazopyridine, arene = p-cymene or biphenyl) are potently cytotoxic at nanomolar concentrations toward a panel of human cancer cell lines; e.g., IC50 = 140 nM for [Os(η6-bip)(azpy-NMe2)I]+ toward A2780 ovarian cancer cells. They exhibit low toxicity and negligible deleterious effects in a colon cancer xenograft model, giving rise to the possibility of a broad therapeutic window. The most active complexes are stable and inert toward aquation. Their cytotoxic activity appears to involve redox mechanisms.Keywords
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