title: Isolation of bis-indole alkaloids with antileishmanial and antibacterial activities from Peschiera van heurkii (syn. Tabernaemontana van heurkii).
abstract: Extracts from leaves and stem bark of Peschiera van heurkii (Muell. Arg.) L. Allorge (syn. Tabernaemontana van heurkii Muell. Arg., Apocynaceae) have been assayed for antileishmanial and antibacterial activities. The activities were concentrated in the alkaloid fractions which yielded 20 indole and bisindole alkaloids. The strongest leishmanicidal and antibacterial activities were observed with the dimeric alkaloids conodurine (1), N-demethylconodurine (= gabunine) (2), and conoduramine (3). Weak toxicity towards macrophage host cells and strong activity against the intracellular amastigote form of Leishmania were observed for compounds 1 and 2. In vivo, 1 was less active than glucantime (= N-methylglucamine antimonate), the drug of reference, while 2 was devoid of activity at 100 mg/kg.
authors.affiliation: Instituto Boliviano de Biologia de Altura (IBBA), La Paz, Bolivia.
authors.forename: V
authors.initials: V
authors.lastname: Muñoz
authors.forename: C
authors.initials: C
authors.lastname: Moretti
authors.forename: M
authors.initials: M
authors.lastname: Sauvain
authors.forename: C
authors.initials: C
authors.lastname: Caron
authors.forename: A
authors.initials: A
authors.lastname: Porzel
authors.forename: G
authors.initials: G
authors.lastname: Massiot
authors.forename: B
authors.initials: B
authors.lastname: Richard
authors.forename: L
authors.initials: L
authors.lastname: Le Men-Olivier
mesh_terms: D000470:Alkaloids / Q000302:isolation & purification* / Q000494:pharmacology; D000818:Animals; D000900:Anti-Bacterial Agents / Q000302:isolation & purification* / Q000494:pharmacology; D000981:Antiprotozoal Agents / Q000302:isolation & purification* / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects*; D007211:Indoles / Q000302:isolation & purification* / Q000494:pharmacology; D007891:Leishmania / Q000187:drug effects*; D007892:Leishmania braziliensis / Q000187:drug effects; D007893:Leishmania donovani / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves; D018547:Plant Stems; D013329:Structure-Activity Relationship
chemical_list: D000470:Alkaloids; D000900:Anti-Bacterial Agents; D000981:Antiprotozoal Agents; D007211:Indoles; D010936:Plant Extracts