Antimalarial activity of WR 243251, a dihydroacridinedione

J. Berman, L. Brown, R. Miller, S. L. Andersen, P. McGreevy, B. G. Schuster, W. Ellis, A. Ager, R. Rossan

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


WR 243251 is a dihydroacridinedione that was evaluated for antimalarial blood schizonticidal activity in vitro and in vivo. The in vitro doses calculated to kill 50% of organisms were 11 nM for a chloroquine-susceptible, mefloquine-resistant standard strain and 25 nM for a chloroquine- and pyrimethamine-resistant standard strain. The total dose needed to cure 100% of mice infected with a drug-susceptible strain of Plasmodium berghei was 12 to 20 mg/kg of body weight for both oral and subcutaneous administration. The regimen needed to cure 100% of Aotus monkeys infected with Plasmodium falciparum was 8 mg/kg/day for 3 days (chloroquine-susceptible strain) and 16 mg/kg/day for 3 days (chloroquine-resistant strain). The 100% curative doses for Aotus monkeys did not increase for parasites previously exposed to subcurative doses. The absolute value of the curative doses of WR 243251 was comparable to or lower than the values for clinical antimalarial agents. The high absolute activity, comparability of activities against susceptible and resistant parasites, and inability to induce resistance by exposure to subcurative doses suggest that WR 243251 has strong potential as a blood- schizonticidal agent.

Original languageEnglish (US)
Pages (from-to)1753-1756
Number of pages4
JournalAntimicrobial agents and chemotherapy
Issue number8
StatePublished - 1994
Externally publishedYes

ASJC Scopus subject areas

  • Pharmacology
  • Pharmacology (medical)
  • Infectious Diseases


Dive into the research topics of 'Antimalarial activity of WR 243251, a dihydroacridinedione'. Together they form a unique fingerprint.

Cite this