RESUMO
Extracts of Fasciola hepatica adult worms contain antigens reactive with antisera prepared against Schistosoma mansoni adult worms. These antigens are poorly solubilized when homogenized in a phosphate buffered saline (PBS) solution and pellet readily when subjected to high speed centrifugation. Solubilization is improved greatly by the addition of sodium dodecyl sulfate (0.03%) to the PBS. When this is done, one obtains approximately the same total amount of crude Lowry reactive material as with PBS extraction followed by high speed centrifugation but antigenic reactivity to an anti-S. mansoni antiserum increases enormously. The antigens liberated from F. hepatica SDS extraction are largely materials under 200,000 MW and over 60,000 MW.
Assuntos
Anticorpos/imunologia , Antígenos/isolamento & purificação , Fasciola hepatica/imunologia , Schistosoma mansoni/imunologia , Animais , Anticorpos/isolamento & purificação , Reações Antígeno-Anticorpo , Cromatografia em Gel , Camundongos , Esquistossomose/imunologia , SolubilidadeRESUMO
Rabbits infected with Fasciola hepatica develop precipitins to adult worm heomogenates, as observed by Ouchterlony double immunodiffusion (ID) and counterelectrophoresis (CEP). When they are successfully treated with a fasciolicidal drug such as rafoxanide at 5, 6, or 11 weeks of infection their precipitins drop dramatically by 2 weeks post-treatment, they are virtually negative by 4 weeks, and have no detectable precipitins by 5 or 6 weeks post-treatment. The results suggest that ID or CEP can be utilized to show chemotherapeutic success in rabbits infected with F. hepatica and warrant further studies as to their possible application in human fascioliasis.
