Eusynstyelamides A, B, and C, nNOS inhibitors, from the ascidian Eusynstyela latericius.
J Nat Prod
; 72(6): 1115-20, 2009 Jun.
Article
en En
| MEDLINE
| ID: mdl-19505081
Eusynstyelamides A-C (1-3) were isolated from the Great Barrier Reef ascidian Eusynstyela latericius, together with the known metabolites homarine and trigonelline. The structures of 1-3, with relative configurations, were elucidated by interpretation of their spectroscopic data (NMR, MS, UV, IR, and CD). The NMR data of 1 were found to be virtually identical to that reported for eusynstyelamide (4), isolated from E. misakiensis, indicating that a revision of the structure of 4 is needed. Eusynstyelamides A-C exhibited inhibitory activity against neuronal nitric oxide synthase (nNOS), with IC(50) values of 41.7, 4.3, and 5.8 microM, respectively, whereas they were found to be nontoxic toward the three human tumor cell lines MCF-7 (breast), SF-268 (CNS), and H-460 (lung). Compounds 1 and 2 displayed mild inhibitory activity toward Staphylococcus aureus (IC(50) 5.6 and 6.5 mM, respectively) and mild inhibitory activity toward the C(4) plant regulatory enzyme pyruvate phosphate dikinase (PPDK) (IC(50) values of 19 and 20 mM, respectively).
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Urocordados
/
Óxido Nítrico Sintasa de Tipo I
/
Indoles
Límite:
Animals
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Female
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Humans
Idioma:
En
Revista:
J Nat Prod
Año:
2009
Tipo del documento:
Article
País de afiliación:
Australia
Pais de publicación:
Estados Unidos