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2015 ; 8
(3
): 483-503
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Antifungal Activity of 14-Helical ?-Peptides against Planktonic Cells and
Biofilms of Candida Species
#MMPMID26287212
Raman N
; Lee MR
; Lynn DM
; Palecek SP
Pharmaceuticals (Basel)
2015[Aug]; 8
(3
): 483-503
PMID26287212
show ga
Candida albicans is the most prevalent cause of fungal infections and treatment
is further complicated by the formation of drug resistant biofilms, often on the
surfaces of implanted medical devices. In recent years, the incidence of fungal
infections by other pathogenic Candida species such as C. glabrata, C.
parapsilosis and C. tropicalis has increased. Amphiphilic, helical ?-peptide
structural mimetics of natural antimicrobial ?-peptides have been shown to
exhibit specific planktonic antifungal and anti-biofilm formation activity
against C. albicans in vitro. Here, we demonstrate that ?-peptides are also
active against clinically isolated and drug resistant strains of C. albicans and
against other opportunistic Candida spp. Different Candida species were
susceptible to ?-peptides to varying degrees, with C. tropicalis being the most
and C. glabrata being the least susceptible. ?-peptide hydrophobicity directly
correlated with antifungal activity against all the Candida clinical strains and
species tested. While ?-peptides were largely ineffective at disrupting existing
Candida biofilms, hydrophobic ?-peptides were able to prevent the formation of C.
albicans, C. glabrata, C. parapsilosis and C. tropicalis biofilms. The
broad-spectrum antifungal activity of ?-peptides against planktonic cells and in
preventing biofilm formation suggests the promise of this class of molecules as
therapeutics.