Detección de péptidos inmunorreactivos de Fasciola hepatica, con sueros de personas infectadas, mediante enzimo-inmunoelectrotransferencia / Detection of immunoreactive peptides of Fasciola hepatica, with sera from infected subjects, by immunoelectrotransfer

ABSTRACT

In order to observe the immunoreactive peptides in a crude extract of adult Fasciola hepatica specimens, proteins were separated by 10// sodium dodecyl sulfate polyacrilamide gel electrophoresis (SDS-PAGE) and transfered to nitrocellulose paper. Next, sera from 14 human cases of F. hepatica infection, parasitologically confirmed, which presented high titers of specific antivodies aginst F. hepatica detected by ELISA, were reacted with the blotted peptides and immunodetected by an anti-human IgG conjugated with horse-radish peroxidase. SDS-PAGE showed at least 18 bands ranging 96 to 14Kd. Groups of peptides weighting 94-66 Kd, 43-36 Kd and 35-14 Kd reacted with serum antibodies of 12 fascioliasis patients. In the remaining to cases, reactive peptides were not clearly observed. The 94-66 Kd components were immunoreactive with 12 out of the 14 serum samples. On the other hand, 43-36 Kd peptides reacted with 4 of the 14 sera and only 3 out of the 14 sera of infected individuals showed reaction with 30-14 Kd. F. hepatica infection induces in humans diverse antivody responses, being 94-66 Kd bands the most immunoreactive peptides and would be potential serodiagnostic antigens