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faculty: "ACTA" and publication year: "2010"
| Authors||F. López-Soto, N. León-Sicairos, K. Nazmi, J.G. Bolscher, M. de la Garza|
|Title||Microbicidal effect of the lactoferrin peptides Lactoferricin17-30, Lactoferrampin265-284, and Lactoferrin chimera on the parasite Entamoeba histolytica|
|Abstract||Entamoeba histolytica is a parasitic protozoan that produces amoebiasis, an intestinal disease characterized by ulcerative colitis and dysentery. In some cases, trophozoites can travel to the liver leading to hepatic abscesses and death. Recently, lactoferrin and lactoferricin B have been shown to be amoebicidal in axenic cultures. The aim of this work was to determine whether the lactoferrin-peptides lactoferricin amino acids 17–30, lactoferrampin amino acids 265–284, and lactoferrin chimera which is a fusion product of the two peptides, are capable of producing a microbicidal effect to trophozoites of E. histolytica. We evaluated the killing effect of these peptides in growth kinetics carried out in axenic culture medium to which different concentrations of peptides were added. At 50 μM of peptide concentration, lactoferricin and lactoferrampin had a moderate amoebicidal effect, since a 45–50% of trophozoites remained viable at 24 h culture. However, at 50 μM of the lactoferrin chimera 75% amoeba were killed whereas at 100 μM all cells died. These data indicate that of lactoferrin-peptides mainly the chimera have amoebicidal activity in a time- and concentration-dependent manner. The lactoferrin-peptides might be useful as therapeutic agents against amoebiasis and thereby diminish the use of metronidazole, which is extremely toxic for the host.|
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