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ATP diphosphohydrolase fromSchistosoma mansoniegg: characterization and immunocytochemical localization of a new antigen
- Source :
- Parasitology. 129:51-57
- Publication Year :
- 2004
- Publisher :
- Cambridge University Press (CUP), 2004.
-
Abstract
- The fact that theSchistosoma mansoniegg has two ATP diphosphohydrolase (EC 3.6.1.5) isoforms with different net charges and an identical molecular weight of 63000, identified by non-denaturing polyacrylamide gel electrophoresis and immunological cross-reactivity with potato apyrase antibodies, is shown. In soluble egg antigen (SEA), only the isoform with the lower net negative charge was detected and seemed to be the predominant species in this preparation. By confocal fluorescence microscopy, using anti-potato apyrase antibodies, theS. mansoniegg ATP diphosphohydrolase was detected on the external surface of miracidium and in von Lichtenberg's envelope. Intense fluorescence was also seen in the outer side of the egg-shell, entrapped by the surface microspines, suggesting that a soluble isoform is secreted. ATP diphosphohydrolase antigenicity was tested using the vegetable protein as antigen. The purified potato apyrase was recognized in Western blots by antibodies present in sera from experimentallyS. mansoni-infected mice. In addition, high levels of IgG anti-ATP diphosphohydrolase antibodies were detected by ELISA in the same sera. This work represents the first demonstration of antigenic properties ofS. mansoniATP diphosphohydrolase and immunological cross-reactivity between potato apyrase and sera from infected individuals.
- Subjects :
- Antigenicity
Blotting, Western
Immunocytochemistry
Mice
Antigen
Animals
Polyacrylamide gel electrophoresis
biology
Apyrase
Schistosoma mansoni
biology.organism_classification
Immunohistochemistry
Molecular biology
Isoenzymes
Molecular Weight
Blot
Infectious Diseases
Liver
Microscopy, Fluorescence
Biochemistry
Antigens, Helminth
biology.protein
Electrophoresis, Polyacrylamide Gel
Animal Science and Zoology
Parasitology
Antibody
Subjects
Details
- ISSN :
- 14698161 and 00311820
- Volume :
- 129
- Database :
- OpenAIRE
- Journal :
- Parasitology
- Accession number :
- edsair.doi.dedup.....83f5411b9af1aba09dd48bd9b360135f