Artemisone and artemiside control acute and reactivated toxoplasmosis in a murine model.

Immunocompromised patients are at risk of developing toxoplasmosis, and although chemotherapy is available, standard treatments are often complicated by severe side effects. Artemisinin is a new highly potent antimalarial drug that has activity against Toxoplasma gondii in vitro. However, artemisinin derivatives have previously been ineffective in vivo using a rat model of toxoplasmosis. In the present study, the efficacy of several new artemisinin derivates was investigated for treatment of mice infected with the parasite Toxoplasma gondii. Artemiside and artemisone displayed better inhibition than either artemisinin or artesunate against the parasite in vitro. Artemiside and artemisone treatment controlled parasite replication in vivo, and mice survived the acute infection. In a murine model of reactivated toxoplasmosis, both drugs increased survival, although artemiside was more effective. These results indicate that these newer derivatives of artemisinin may have potential for treatment of toxoplasmosis.
AuthorsIldiko R Dunay, Wing Chi Chan, Richard K Haynes, L David Sibley
JournalAntimicrobial agents and chemotherapy (Antimicrob Agents Chemother) Vol. 53 Issue 10 Pg. 4450-6 (Oct 2009) ISSN: 1098-6596 [Electronic] United States
PMID19635951 (Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
Chemical References
  • Antimalarials
  • Artemisinins
  • artemisone
  • Animals
  • Antimalarials (chemistry, therapeutic use)
  • Artemisinins (chemistry, therapeutic use)
  • Female
  • Mice
  • Mice, Inbred C57BL
  • Mice, Mutant Strains
  • Molecular Structure
  • Toxoplasmosis, Animal (drug therapy)

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