PMID: 6514380Dec 1, 1984Paper

The formation of surface membrane vesicles from schistosomula of Schistosoma mansoni

John R KuselM N Cordeiro


Intact surface membrane vesicles were obtained and purified from the schistosomula of Schistosoma mansoni. The method of preparation of the vesicles involved treating the schistosomula in a buffered high salt medium for 1 h at 4 degrees C (Step 1), and then for 1 h at 25-37 degrees C (Step 2). Vesicles were formed from mechanically- and skin-transformed schistosomula, and their size and number depended on the temperature of Step 2. The majority of the vesicles expressed surface membrane concanavalin A receptors and parasite antigens on their outermost surfaces. When incubated with sensitized peripheral blood mononuclear cell preparations from humans exposed to schistosomal preparations, the vesicles stimulated lymphocyte transformation as effectively as soluble egg and adult worm antigens. Although both preparations contained identical proteins, small vesicles were less effective than large vesicles in stimulating lymphocyte transformation. Hence, vesicles prepared under a variety of conditions might be used to study those factors which influence the presentation of membrane-bound surface antigens to the immune system of the host.


Jan 1, 1977·Comparative Biochemistry and Physiology. B, Comparative Biochemistry·Y NagaiJ Pellegrino
Jan 1, 1978·The American Journal of Tropical Medicine and Hygiene·P MinardK D Murrell
Dec 28, 1973·Biochimica Et Biophysica Acta·G Poste, A C Allison
Mar 1, 1972·International Journal for Parasitology·J A Clegg, S R Smithers
Jan 1, 1973·International Journal for Parasitology·D J Hockley, D J McLaren
Feb 1, 1974·Experimental Parasitology·D G Colley, S K Wikel
Mar 1, 1983·Molecular and Biochemical Parasitology·F D Rumjanek, M Curiel
Feb 1, 1980·Proceedings of the National Academy of Sciences of the United States of America·L S BarakW W Webb

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May 1, 1990·International Journal for Parasitology·A N MacGregor, S J Shore
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