Novel dendrimeric lipopeptides with antifungal activity
摘要:
A series of new cationic lipopeptides containing branched, amphiphilic polar head derived from (Lys)Lys(Lys) dendron and C-8 or C-12 chain at C-end were designed, synthesized and characterized. Antimicrobial in vitro activity expressed as minimal inhibitory concentration (MIC) was evaluated against Gram-positive and Gram-negative bacteria and yeasts from the Candida genus. A significant enhancement of antimicrobial potency along with increased selectivity against Candida reference strains was detected for derivatives with the C12 residue. Several compounds were characterized by a low hemotoxicity. The antifungal activity of branched lipopeptides is multimodal and concentration dependent. Several compounds, studied in detail, induced potassium leakage from fungal cells, caused morphological alterations of fungal cells and inhibited activity of candidal beta(1,3)-glucan synthase. (C) 2011 Elsevier Ltd. All rights reserved.
Peptide dendrimers as antifungal agents and carriers for potential antifungal agent—
<i>N</i>
<sup>3</sup>
‐(4‐methoxyfumaroyl)‐(
<i>S</i>
)‐2,3‐diaminopropanoic acid—synthesis and antimicrobial activity
and their conjugates with antimicrobialagent FMDP (N3‐(4‐methoxyfumaroyl)‐(S)‐2,3‐diamino‐propanoic acid) were synthesized. The obtained compounds were tested for the antibacterial and antifungalactivity. All novel dendrimers displayed much better activity against the tested strains than FMDP itself. Moreover, their conjugates with FMDP also exhibited antimicrobialactivity. The most promising molecules