title: Anthelmintic activity in vivo of epiisopiloturine against juvenile and adult worms of Schistosoma mansoni.
abstract: Schistosomiasis is a serious disease currently estimated to affect more that 207 million people worldwide. Due to the intensive use of praziquantel, there is increasing concern about the development of drug-resistant strains. Therefore, it is necessary to search for and investigate new potential schistosomicidal compounds. This work reports the in vivo effect of the alkaloid epiisopiloturine (EPI) against adults and juvenile worms of Schistosoma mansoni. EPI was first purified its thermal behavior and theoretical solubility parameters charaterised. In the experiment, mice were treated with EPI over the 21 days post-infection with the doses of 40 and 200 mg/kg, and 45 days post-infection with single doses of 40, 100 and 300 mg/kg. The treatment with EPI at 40 mg/kg was more effective in adult worms when compared with doses of 100 and 300 mg/kg. The treatment with 40 mg/kg in adult worms reduced parasite burden significantly, lead to reduction in hepatosplenomegaly, reduced the egg burden in faeces, and decreased granuloma diameter. Scanning electron microscopy revealed morphological changes to the parasite tegument after treatment, including the loss of important features. Additionally, the in vivo treatment against juvenile with 40 mg/kg showed a reduction of the total worm burden of 50.2%. Histopathological studies were performed on liver, spleen, lung, kidney and brain and EPI was shown to have a DL50 of 8000 mg/kg. Therefore EPI shows potential to be used in schistosomiasis treatment. This is the first time that schistosomicidal in vivo activity of EPI has been reported.
authors: Biotechnology and Biodiversity Center Research, BIOTEC, Federal University of Piauí, Parnaíba, Piauí, Brazil.
authors: Maria A
authors: MA
authors: Guimarães
authors: Department of Animal Biology, Institute of Biology, State University of Campinas, Campinas, São Paulo, Brazil.
authors: Rosimeire N
authors: RN
authors: de Oliveira
authors: Biotechnology and Biodiversity Center Research, BIOTEC, Federal University of Piauí, Parnaíba, Piauí, Brazil; Graduate Program in Biotechnology, RENORBIO, Focal Point Federal University of Piauí, Teresina, Piauí, Brazil.
authors: Leiz M C
authors: LM
authors: Véras
authors: Biotechnology and Biodiversity Center Research, BIOTEC, Federal University of Piauí, Parnaíba, Piauí, Brazil; Graduate Program in Biotechnology, RENORBIO, Focal Point Federal University of Piauí, Teresina, Piauí, Brazil; Collegiate Academic Medicine, Federal University of São Francisco Valley, Campus Paulo Afonso, Paulo Afonso, Bahia, Brazil.
authors: David F
authors: DF
authors: Lima
authors: Biotechnology and Biodiversity Center Research, BIOTEC, Federal University of Piauí, Parnaíba, Piauí, Brazil; Graduate Program in Biotechnology, RENORBIO, Focal Point Federal University of Piauí, Teresina, Piauí, Brazil.
authors: Yuri D M
authors: YD
authors: Campelo
authors: Biotechnology and Biodiversity Center Research, BIOTEC, Federal University of Piauí, Parnaíba, Piauí, Brazil.
authors: Stefano Augusto
authors: SA
authors: Campos
authors: Faculty of Medicine, University of Brasilia, UNB Campus Dacy Ribeiro, Brasília, Distrito Federal, Brazil.
authors: Selma A S
authors: SA
authors: Kuckelhaus
authors: Adolfo Lutz Institute, Central Laboratory, São Paulo, Brazil.
authors: Pedro L S
authors: PL
authors: Pinto
authors: UCIBIO, REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Science, University of Porto, Portugal.
authors: Peter
authors: P
authors: Eaton
authors: Group of Crystallography, Institute of Physics of São Carlos, University of São Paulo, São Carlos, São Paulo, Brazil.
authors: Ana C
authors: AC
authors: Mafud
authors: Group of Crystallography, Institute of Physics of São Carlos, University of São Paulo, São Carlos, São Paulo, Brazil.
authors: Yvonne P
authors: YP
authors: Mascarenhas
authors: Department of Animal Biology, Institute of Biology, State University of Campinas, Campinas, São Paulo, Brazil.
authors: Silmara M
authors: SM
authors: Allegretti
authors: Research Center for Neglected Diseases (NPDN/FACIG), Guarulhos, São Paulo, Brazil.
authors: Josué
authors: J
authors: de Moraes
authors: Faculty of Chemistry, University of Belgrade, Belgrade, Serbia.
authors: Aleksandar
authors: A
authors: Lolić
authors: Faculty of Chemistry, University of Belgrade, Belgrade, Serbia.
authors: Tatjana
authors: T
authors: Verbić
authors: Biotechnology and Biodiversity Center Research, BIOTEC, Federal University of Piauí, Parnaíba, Piauí, Brazil.
authors: José Roberto S A
authors: JR
authors: Leite
mesh_terms: D015107:4-Butyrolactone / Q000031:analogs & derivatives* / Q000494:pharmacology; D000818:Animals; D004305:Dose-Response Relationship, Drug; D005243:Feces / Q000469:parasitology; D006099:Granuloma / Q000473:pathology; D007093:Imidazoles / Q000494:pharmacology*; D008099:Liver / Q000187:drug effects / Q000469:parasitology; D051379:Mice; D008855:Microscopy, Electron, Scanning; D012550:Schistosoma mansoni / Q000187:drug effects* / Q000648:ultrastructure; D012555:Schistosomiasis mansoni / Q000188:drug therapy*; D012556:Schistosomicides / Q000494:pharmacology*
chemical_list: D007093:Imidazoles; D012556:Schistosomicides; C575691:epiisopiloturine; D015107:4-Butyrolactone