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Am. J. Trop. Med. Hyg., 39(1), 1988, pp. 46-51
Copyright © 1988 by The American Society of Tropical Medicine and Hygiene

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Effect of Praziquantel on Schistosoma Mansoni Eggs: Leucine Aminopeptidase (LAP) Activity and Anti-LAP Antibodies

Yi-Zheng Xu, Hajime Matsuda AND Marc H. Dresden*
Department of Parasitology, Institute of Medical Science, The University of Tokyo, Minato-ku, Tokyo 108, Japan
* Verna and Marrs McLean Department of Biochemistry, Baylor College of Medicine, One Baylor Plaza, Houston, Texas

High levels of leucine aminopeptidase (LAP) have been detected in Schistosoma mansoni eggs. In this report we demonstrate that this enzyme is immunogenic in mice infected with either S. mansoni or S. japonicum. The anti-schistosomal agent, praziquantel, causes rapid release of this enzyme from schistosome eggs in vitro. Praziquantel treatment of S. japonicum infected mice is associated with a significant decrease in anti-LAP antibodies. Anti-LAP IgM antibody levels decreased more than did anti-LAP IgG antibodies.

Accepted for publication December 10, 1987.






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Copyright © 1988 by the American Society of Tropical Medicine and Hygiene.