Active Cu(II), Mn(II) and Ag(I) 1,10-phenanthroline/1,10-phenanthroline-5,6-dione/dicarboxylate chelates: effects on Scedosporium .
Future microbiology(2023)
Abstract
species are human pathogens resistant to almost all antifungals currently available in clinical practice. The effects of 16 1,10-phenanthroline (phen)/1,10-phenanthroline-5,6-dione/dicarboxylate chelates containing Cu(II), Mn(II) and Ag(I) against , , and were evaluated. To different degrees, all of the test chelates inhibited the viability of planktonic conidial cells, displaying MICs ranging from 0.029 to 72.08 μM. Generally, Mn(II)-containing chelates were the least toxic to lung epithelial cells, particularly [Mn(oda)(phen)(HO)][Mn(oda)(phen)(oda)].4HO (MICs: 1.62-3.25 μM: selectivity indexes >64). Moreover, this manganese-based chelate reduced the biofilm biomass formation and diminished the mature biofilm viability. [Mn(oda)(phen)(HO)][Mn(oda)(phen)(oda)].4HO opens a new chemotherapeutic avenue for the deactivation of these emergent, multidrug-resistant filamentous fungi.
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Key words
1, 10-phenanthroline, antifungal resistance, biofilm, chemotherapy, coordination compounds, Scedosporium, Lomentospora
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