ABSTRACT
Two new 24-homoscalarane sesterterpenoids, felixins F (1) and G (2), were isolated from the sponge Ircinia felix. The structures of new homoscalaranes 1 and 2 were elucidated by extensive spectroscopic methods, particularly with one-dimensional (1D) and two-dimensional (2D) NMR, and, by comparison, the spectral data with those of known analogues. The cytotoxicity of 1 and 2 against the proliferation of a limited panel of tumor cell lines was evaluated and 1 was found to show cytotoxicity toward the leukemia K562, MOLT-4, and SUP-T1 cells (IC50 ≤ 5.0 µM).
Subject(s)
Porifera/chemistry , Sesterterpenes/chemistry , Sesterterpenes/toxicity , Animals , Cell Line , Cell Proliferation/drug effects , Humans , Molecular StructureABSTRACT
Five new scalarane sesterterpenoids, felixins A-E (1-5), were isolated from the Formosan sponge Ircinia felix. The structures of scalaranes 1-5 were elucidated on the basis of spectroscopic analysis. Cytotoxicity of scalaranes 1-5 against the proliferation of a limited panel of tumor cell lines was evaluated.
Subject(s)
Porifera/chemistry , Sesterterpenes/isolation & purification , Terpenes/isolation & purification , Animals , Antineoplastic Agents/isolation & purification , Antineoplastic Agents/pharmacology , Sesterterpenes/pharmacology , TaiwanABSTRACT
AbstractIn this study, 39 extracts from marine organisms were evaluated as quorum sensing inhibitors, collected in the Colombian Caribbean Sea and the Brazilian Coast including 26 sponges, seven soft corals, five algae and one zooanthid. The results showed that crude extracts from the soft coral Eunicea laciniata, and the sponges Svenzea tubulosa, Ircinia felix and Neopetrosia carbonaria were the most promising source of quorum sensing inhibitors compounds without affecting bacterial growth, unlike the raw extracts of Agelas citrina, Agelas tubulata, Iotrochota arenosa, Topsentia ophiraphidites, Niphates caycedoi, Cliona tenuis, Ptilocaulis walpersi, Petrosia pellasarca, and the algae Laurencia catarinensis and Laurencia obtusa, which displayed potent antibacterial activity against the biosensors employed. The crude extract from the sponge I. felix was fractionated, obtaining furanosesterterpenes which were identified and evaluated as quorum sensing inhibitors, showing a moderate activity without affecting the biosensor's growth.
