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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Praziquantel efficacy in mice infected with PZQ non-susceptible S. mansoni isolate treated with artemether: Parasitological, biochemical and immunohistochemical assessment
APMIS, Volume 118, No. 9, Year 2010
Notification
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Description
Based on the fact that artemether (ART) affects immature schistosomes and that the effect of praziquantel (PZQ) mainly targets mature schistosomes, this work investigates the possible enhanced efficacy of PZQ in combination with ART in mice harboring a PZQ non-susceptible Schistosoma mansoni isolate. Associated schistosomal, inflammatory, hepatic histopathological changes have been investigated by examining the tissue markers expressing apoptosis using FAS (CD95), anti-apoptosis (Bcl2) and angiogenesis [vascular endothelial growth factor (VEGF)]. A batch of Swiss albino mice infected with a PZQ non-susceptible (EE10) S. mansoni isolate was divided into 12 groups. Animals of the first group were left without treatment as infected controls, while groups 2-6 received PZQ in increasing doses. The animals of group 7 received ART in double doses. Those comprising groups 8-12 received combined therapy of PZQ and ART in the same doses and at the same timings postinfection (PI) as those belonging to groups 2-6. Parasitological parameters, liver function, and histopathological and immunohistochemical studies of FAS, Bcl2 and VEGF antibodies were assessed. Combined administration of ART and PZQ reduced the ED50 (the dose at which the worm burden was decreased by 50%) of PZQ. Typical granulomas were not seen in animals treated with ART alone and combined with PZQ, with least expression of FAS and VEGF and increased expression of Bcl2. The minimal histopathological changes recorded in mice treated with both ART and PZQ could be related to a synergisticadditive effect of ART, markedly reducing the intensity of infection. Improved liver function tests support the less severe histopathological changes under the influence of this treatment protocol. This study encourages human trials especially in areas where malaria is not endemic, and differing combination doses should be investigated in view of the antagonistic effect noticed with some dose regimens. © 2010 The Authors. Journal Compilation © 2010 APMIS.
Authors & Co-Authors
Botros, Sanaa
Egypt, Giza
Immunology and Therapeutic Evaluation Division
Hammam, Olfat Ali
Egypt, Giza
Clinical Lab Research Division
Mahmoud, Madiha R.
Egypt, Giza
Immunology and Therapeutic Evaluation Division
Bergquist, Robert N.
Unknown Affiliation
Statistics
Citations: 23
Authors: 4
Affiliations: 2
Identifiers
Doi:
10.1111/j.1600-0463.2010.02645.x
ISSN:
09034641
e-ISSN:
16000463
Research Areas
Cancer
Infectious Diseases