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Occurrence of fibronectin antigenic determinants on Schistosoma mansoni lung schistosomula and adult worms
Published online by Cambridge University Press: 06 April 2009
Summary
Fibronectin determinants were revealed in a soluble extract of Schistosoma mansoni adult worms by standard immunodiffusion and immunoelectrophoresis techniques. The same target molecules were demonstrated on the parasite's surface using a binding assay with [125I] anti-fibronectin. The use of fluorescein- and peroxidase-conjugated antibodies confirmed the above observations and provided a fairly precise means for locating the cross-reacting antigen on the worm surface. An in vitro cytotoxic assay using inactivated (56°C, 2 h) anti-fibronectin rabbit immune serum and guinea-pig serum as a source of complement was developed. In these conditions, anti-fibronectin exerted cytotoxic activity against lung schistosomula and adult worms but not skin schistosomula. The ultrastructural damage induced by anti-fibronectin in the presence of complement was studied using transmission electron microscopy. The results suggest a close association between fibronectin determinants and S. mansoni membrane.
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- Copyright © Cambridge University Press 1984
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