Gh. Posner et al., NEW, ANTIMALARIAL, TRICYCLIC 1,2,4-TRIOXANES - EVALUATIONS IN MICE AND MONKEYS, The American journal of tropical medicine and hygiene, 50(4), 1994, pp. 522-526
Citations number
19
Categorie Soggetti
Public, Environmental & Occupation Heath","Tropical Medicine
We have concluded initial preclinical studies with synthetic trioxanes
numbered 3-9 and have compared them with artemisinin (numbered 1) usi
ng CD-1 mice infected with Plasmodium berghei. Based on their antimala
rial effectiveness in mice, two of these synthetic trioxanes were sele
cted for evaluation in Aotus monkeys infected with multidrug-resistant
(MDR) P. falciparum. Trioxane numbered 8 (12 and 48 mg/kg), trioxane
numbered 9 (12 and 48 mg/kg) and arteether (numbered 2, 48 mg/kg) were
administered intramuscularly in three 12-hr doses to A. lemurinus lem
urinus (Panamanian owl monkeys) infected with the Vietnam Smith/RE str
ain of P. falciparum and monitored for parasitemia. Trioxane numbered
8 at 12 mg/kg cleared parasitemia in two monkeys, but recrudescence oc
curred in one animal. Treatment of the recrudescent infection with 48
mg/kg was curative. Infections in two monkeys treated initially with 4
8 mg/kg were cured (six-month follow-up). Trioxane numbered 9 produced
a similar outcome: 12 mg/kg suppressed parasitemia in two monkeys but
was nut curative; however, 48 mg/kg cured infections in all four monk
eys treated. These preliminary observations show synthetic trioxanes n
umbered 8 and 9 to be as effective as arteether (numbered 2) against M
DR in P. falciparum in the Aotus monkey.