Insights into the mode of action of the anti-candida activity of 1,10-phenanthroline and its metal chelates

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Abstract

Metal complexes of malonic acid (metal = Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Ag(I)) were prepared and only the Ag(I) complex inhibited the growth of Candida albicans. Malonate complexes incorporating the chelating 1,10-phenanthroline (1,10-phen) ligand showed a range of activities: good (Mn(II), Cu(II), Ag(I)); moderate (Zn(II)); poor (Co(II), Ni(II)). Metal-free 1,10-phen and Ag(CH3CO2) were also highly active. The metal-free non-chelating ligands 1,7-phenanthroline and 4,7-phenanthroline were inactive and the Cu(II), Mn(II) and Zn(II) complexs of 1,7-phen displayed only marginal activity. Whereas the Cu(II) malonate/1,10-phen complex induces significant cellular oxidative stress the Zn(II) analogue does not.

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McCann, M., Geraghty, M., Devereux, M., O’Shea, D., Mason, J., & O’Sullivan, L. (2000). Insights into the mode of action of the anti-candida activity of 1,10-phenanthroline and its metal chelates. Metal-Based Drugs, 7(4), 185–193. https://doi.org/10.1155/MBD.2000.185

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