Journal
EXPERIMENTAL PARASITOLOGY
Volume 123, Issue 1, Pages 11-16Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.exppara.2009.05.002
Keywords
Phylloseptin; Antimicrobial peptide; Leishmania amazonensis; Plasmodium falciparum; Antiparasitic therapy; Phyllomedusa azurea; Hormesis
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Funding
- Brazilian National Research Council
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The development of drug resistance by infectious agents represents a major hindrance for controlling parasitic diseases and has stimulated the search for new compounds. We have previously shown that phylloseptin-1 (PS-1), a cationic peptide from the skin secretion of Phyllomedusa azurea, exhibited potent antimicrobial activity. Now we evaluate the effect of PS-I on Leishmania amazonensis and Plasmodium falciparum. Concentrations as low as 0.5 mu g/mL of PS-I exhibited antileishmanial activity comparable to that of antimoniate of N-metilglucamine, while the antiplasmodial effect of PS-1 was evident at the concentration of 16 mu g/mL, and reached an activity comparable to that of artesunate, at the concentration of 64 mu g/mL The high antiparasitic activity of PS-1, together with the unrelatedness of its chemical structure to any present antimicrobial drug, which prevents the development of cross-resistance, together with its non-toxicity to mammalian cells make this peptide a promising candidate for the treatment of malaria and leishmaniasis. (C) 2009 Elsevier Inc. All rights reserved.
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