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Novel Synthetic Polyamines Have Potent Antimalarial Activities

Authors :
Kamal, El Bissati
Henry, Redel
Li-Min, Ting
Joseph D, Lykins
Martin J, McPhillie
Rajendra, Upadhya
Patrick M, Woster
Nigel, Yarlett
Kami, Kim
Louis M, Weiss
Source :
Frontiers in Cellular and Infection Microbiology
Publication Year :
2018

Abstract

Twenty-two compounds belonging to several classes of polyamine analogs have been examined for their ability to inhibit the growth of the human malaria parasite Plasmodium falciparum in vitro and in vivo. Four lead compounds from the thiourea sub-series and one compound from the urea-based analogs were found to be potent inhibitors of both chloroquine-resistant (Dd2) and chloroquine-sensitive (3D7) strains of Plasmodium with IC50 values ranging from 150 to 460 nM. In addition, the compound RHW, N1,N7-bis (3-(cyclohexylmethylamino) propyl) heptane-1,7-diamine tetrabromide was found to inhibit Dd2 with an IC50 of 200 nM. When RHW was administered to P. yoelii-infected mice at 35 mg/kg for 4 days, it significantly reduced parasitemia. RHW was also assayed in combination with the ornithine decarboxylase inhibitor difluoromethylornithine, and the two drugs were found not to have synergistic antimalarial activity. Furthermore, these inhibitors led to decreased cellular spermidine and spermine levels in P. falciparum, suggesting that they exert their antimalarial activities by inhibition of spermidine synthase.

Details

ISSN :
22352988
Volume :
9
Database :
OpenAIRE
Journal :
Frontiers in cellular and infection microbiology
Accession number :
edsair.pmid..........bc3b0363c3f04bcdd133057d0584b47c