title: Isolation, characterization and antiplasmodial activity of steroidal alkaloids from Funtumia elastica (Preuss) Stapf.
abstract: Bioassay-guided fractionation of the EtOH extract of the stem bark of Funtumia elastica resulted in the isolation of four steroidal alkaloids, holarrhetine (1), conessine (2), holarrhesine (3) and isoconessimine (4). Their structures were determined on the basis of 1D- and 2D-NMR techniques and mass spectrometry. Compounds 1-4 exhibited in vitro antiplasmodial activity against the chloroquine-resistant strain FcB1 of Plasmodium falciparum with IC50 values ranging from 0.97 to 3.39 microM. They showed weak cytotoxicity against a rat cell line L-6 with IC50 values ranging from 5.13 to 36.55 microM.
authors.affiliation: Laboratoire de Botanique, UFR Biosciences, Université de Cocody, 22 BP 582 Abidjan 22, Ivory Coast.
authors.forename: Guédé Noël
authors.initials: GN
authors.lastname: Zirihi
authors.forename: Philippe
authors.initials: P
authors.lastname: Grellier
authors.forename: Frédérick
authors.initials: F
authors.lastname: Guédé-Guina
authors.forename: Bernard
authors.initials: B
authors.lastname: Bodo
authors.forename: Lengo
authors.initials: L
authors.lastname: Mambu
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D000818:Animals; D000962:Antimalarials / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D029062:Apocynaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010963:Plasmodium falciparum / Q000187:drug effects*; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D000470:Alkaloids; D000962:Antimalarials