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In vitro inhibition of Plasmodium falciparum by substances isolated from Amazonian antimalarial plants

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Author(s): Valter F de Andrade-Neto | Adrian M Pohlit | Ana Cristina S Pinto | Ellen Cristina C Silva | Karla L Nogueira | Márcia RS Melo | Marycleuma C Henrique | Rodrigo CN Amorim | Luis Francisco R Silva | Mônica RF Costa | Rita CS Nunomura | Sergio M Nunomura | Wilson D Alecrim | M das Graças C Alecrim | F Célio M Chaves | Pedro Paulo R Vieira

Journal: Memórias do Instituto Oswaldo Cruz.
ISSN 0074-0276

Volume: 102;
Issue: 3;
Start page: 359;
Date: 2007;
Original page

Keywords: neosergeolide | ellipticine | aspidocarpine | 4-nerolidylcatechol | Pothomorphe peltata | Picrolemma sprucei | Aspidosperma spp

ABSTRACT
In the present study, a quassinoid, neosergeolide, isolated from the roots and stems of Picrolemma sprucei (Simaroubaceae), the indole alkaloids ellipticine and aspidocarpine, isolated from the bark of Aspidosperma vargasii and A. desmanthum (Apocynaceae), respectively, and 4-nerolidylcatechol, isolated from the roots of Pothomorphe peltata (Piperaceae), all presented significant in vitro inhibition (more active than quinine and chloroquine) of the multi-drug resistant K1 strain of Plasmodium falciparum. Neosergeolide presented activity in the nanomolar range. This is the first report on the antimalarial activity of these known, natural compounds. This is also the first report on the isolation of aspidocarpine from A. desmanthum. These compounds are good candidates for pre-clinical tests as novel lead structures with the aim of finding new antimalarial prototypes and lend support to the traditional use of the plants from which these compounds are derived.
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Tangokurs Rapperswil-Jona