title: Transport of antimicrobial agents using peptide carrier systems: anticandidal activity of m-fluorophenylalanine--peptide conjugates.
abstract: A series of di- and tripeptides containing D- and L-m-fluorophenylalanine was prepared and tested in vitro for the ability to inhibit the growth of the yeast Candida albicans. The results demonstrate that peptides containing L-m-fluorophenylalanine inhibited the growth of C. albicans with minimum inhibitory concentrations (MIC's) ranging from 0.5 to 63 micrograms/mL. The parent L-m-fluorophenylalanine and peptides containing D-m-fluorophenylalanine were inactive (MIC greater than 250 micrograms/mL) in these tests. The results of competitive antagonism studies support peptide transport mediated entry of the inhibitory peptides, followed by release of L-m-fluorophenylalanine inside the cell.
mesh_terms: D001692:Biological Transport; D002175:Candida / Q000187:drug effects*; D009842:Oligopeptides / Q000378:metabolism / Q000494:pharmacology*; D010649:Phenylalanine / Q000031:analogs & derivatives* / Q000378:metabolism / Q000494:pharmacology
chemical_list: D009842:Oligopeptides; C027218:3-fluorophenylalanine; D010649:Phenylalanine