Insights Into the Mode of Action of the Anti-Candida Activity of 1,10-Phenanthroline and its Metal Chelates

Author:

McCann Malachy1,Geraghty Majella1,Devereux Michael2,O'Shea Denis2,Mason James3,O'Sullivan Luzveminda3

Affiliation:

1. Chemistry Department, National University of Ireland Maynooth, Maynooth, Co.m, Kildare, Ireland

2. Dublin Institute of Technology, Cathal Brugha Street, Dublin, Ireland

3. Biochemistry Department, Trinity College, Dublin, Ireland

Abstract

Metal complexes of malonie 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.

Publisher

Hindawi Limited

Subject

Inorganic Chemistry,Drug Discovery,Pharmacology,Toxicology

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