Publication Type Journal Article
Title Antimicrobial Activity of Silver Camphorimine Complexes against Candida Strains
Authors Joana P. Costa M. Joana F. Pinheiro Silvia A. Sousa Ana M. Botelho do Rego Fernanda Marques M. Conceição Oliveira Jorge H. Leitao Nuno P. Mira M Fernanda NN Carvalho
Groups BioMol
Journal ANTIBIOTICS-BASEL
Year 2019
Month September
Volume 8
Number 3
Pages
Abstract Hydroxide [Ag(OH)L] (L = L-IV, L-V, L-VI, L-VII), oxide [\AgL\(2)\(mu-O)] (L = L-I, L-II, L-III, L-V, L-VI) or chloride [(AgL)-L-II]Cl, [Ag(L-VI)(2)]Cl complexes were obtained from reactions of mono- or bicamphorimine derivatives with Ag(OAc) or AgCl. The new complexes were characterized by spectroscopic (NMR, FTIR) and elemental analysis. X-ray photoelectron spectroscopy (XPS), ESI mass spectra and conductivity measurements were undertaken to corroborate formulations. The antimicrobial activity of complexes and some ligands were evaluated towards Candida albicans and Candida glabrata, and strains of the bacterial species Escherichia coli, Burkholderia contaminans, Pseudomonas aeruginosa and Staphylococcus aureus based on the Minimum Inhibitory Concentrations (MIC). Complexes displayed very high activity against the Candida species studied with the lowest MIC values (3.9 mu g/mL) being observed for complexes 9 and 10A against C. albicans. A significant feature of these redesigned complexes is their ability to sensitize C. albicans, a trait that was not found for the previously investigated [Ag(NO3)L] complexes. The MIC values of the complexes towards bacteria were in the range of those of [Ag(NO3)L] and well above those of the precursors Ag(OAc) or AgCl. The activity of the complexes towards normal fibroblasts V79 was evaluated by the MTT (3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide) assay. Results showed that the complexes have a significant cytotoxicity.
DOI http://dx.doi.org/10.3390/antibiotics8030144
ISBN
Publisher
Book Title
ISSN
EISSN 2079-6382
Conference Name
Bibtex ID ISI:000489181000059
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