title: Activity of 9-(S)-[3-hydroxy-2-(phosphonomethoxy)propyl]adenine against Schistosomiasis mansoni in mice.
abstract: The activity of the acyclic nucleotide analogue 9-(S)-[3-hydroxy-2-(phosphonomethoxy)propyl]adenine [(S)-HPMPA] against Schistosoma mansoni was investigated in mice. The compound was injected intraperitoneally, usually on two or five consecutive days, at 10 to 20 mg/kg of body weight/day. The treatment started before, at the time of, and after the onset of egg laying (oviposition) by S. mansoni. The animals were killed from 7 to 40 days after the cessation of treatment. Significant reductions in the total numbers of female and coupled worms were found. Female fecundity and both hepatic and intestinal egg loads were suppressed. These effects were more pronounced with dosing regimens launched before the time of oviposition. The complete disappearance of immature eggs and a significant reduction to the complete absence of mature eggs, with 99 to 100% of the eggs being dead, were produced. No hepatic egg-induced granulomas were present in mice treated at the time of oviposition, and the granulomas were smaller in mice treated before S. mansoni oviposition. These preliminary findings extend the knowledge of the antiparasitic properties of (S)-HPMPA.
authors.affiliation: Theodor Bilharz Research Institute, Giza, Egypt.
authors.forename: Sanaa
authors.initials: S
authors.lastname: Botros
authors.forename: Samia
authors.initials: S
authors.lastname: William
authors.forename: Olfat
authors.initials: O
authors.lastname: Hammam
authors.forename: Zdenĕk
authors.initials: Z
authors.lastname: Zídek
authors.forename: Antonín
authors.initials: A
authors.lastname: Holý
mesh_terms: D000225:Adenine / Q000031:analogs & derivatives* / Q000627:therapeutic use*; D000818:Animals; D005260:Female; D005298:Fertility; D006099:Granuloma / Q000473:pathology; D007422:Intestines / Q000469:parasitology; D008099:Liver / Q000469:parasitology / Q000473:pathology; D008297:Male; D051379:Mice; D063065:Organophosphonates; D009943:Organophosphorus Compounds / Q000627:therapeutic use*; D010270:Parasite Egg Count; D011223:Praziquantel / Q000627:therapeutic use; D012550:Schistosoma mansoni; D012555:Schistosomiasis mansoni / Q000188:drug therapy* / Q000523:psychology; D012556:Schistosomicides / Q000627:therapeutic use*
chemical_list: D063065:Organophosphonates; D009943:Organophosphorus Compounds; D012556:Schistosomicides; D011223:Praziquantel; C050127:9-(S)-(3-hydroxy-2-(phosphonomethoxy)propyl)adenine; D000225:Adenine