Diterpenes from Alomia myriadenia (Asteraceae) with cytotoxic and trypanocidal activity |
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| Authors: | Scio Elita Ribeiro Antônia Alves Tânia M A Romanha Alvaro J Dias de Souza Filho José Cordell Geoffrey A Zani Carlos L |
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| Institution: | Laboratório de Química de Produtos Naturais, CPqRR-FIOCRUZ, Av. Augusto de Lima, 1715, Belo Horizonte, MG 30190-002, Brazil. |
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| Abstract: | Further investigation of the aerial parts of Alomia myriadenia revealed an halimane diterpene identified as ent-8S,12S-epoxy-7R,16-dihydroxyhalima-5(10),13-dien-15,16-olide along with the known ent-16-hydroxylabda-7,13-dien-15,16-olide, ent-12R-hydroxylabda-7,13-dien-15,16-olide, 6,7-methylenedioxycoumarin (ayapin), and kaempferol-7-methylether (rhamnocitrin). Evaluated in a panel of human cancer cell lines, the 16-hydroxylabade diterpene was the most active, showing an ED(50) value of 0.3 mug/ml against Lu1 (human lung cancer) cells. Tested in vitro against Trypanosoma cruzi in infected murine blood, this compound caused lysis of 100% of the parasites at 250 mug/ml. |
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| Keywords: | Ageratum myriadenium Alomia myriadenia Compositae Halimane Labdane Trypanosoma cruzi Human cancer cell line |
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