Volume 78, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Praziquantel causes adverse effects after short-term treatment. To examine the mechanism of these effects, we studied the distribution of antigens and the expression of inducible nitric oxide synthase (iNOS), nuclear factor-κB (NF-κB), and antioxidant enzymes in -infected hamsters during short-term praziquantel treatment. Praziquantel-induced dispersion of parasite antigens produced a recruitment of inflammatory cells. NF-κB and iNOS mRNA expression was significantly elevated and associated with their immunoreactivity in the bile duct epithelium and inflammatory cells. Plasma nitrate, end products of nitric oxide, and malondialdehyde level increased significantly. Expression of mRNA for antioxidant enzymes (superoxide dismutases, catalase, and glutathione peroxidase) also increased significantly, which suggests host defense against oxidative stress. These results suggest that short-term praziquantel treatment induces inflammation and resulting oxidative and nitrative stress through antigen release. Data in this study can be used as a basis to understand potential side effects of praziquantel treatment in humans.


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  • Received : 02 Dec 2007
  • Accepted : 08 Jan 2008

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