Cyclizidine-Type Alkaloids from Streptomyces sp. HNA39.
J Nat Prod
; 81(2): 394-399, 2018 02 23.
Article
em En
| MEDLINE
| ID: mdl-29389122
ABSTRACT
Eight new cyclizidine-type alkaloids (1-8) and one known alkaloid (9) were identified from the chemical investigations of a marine-derived actinomycete, Streptomyces sp. HNA39. Among these alkaloids, compounds 3, 7, and 8 contain a chlorine atom, and the known alkaloid, (+)-ent-cyclizidine (9), is now first reported as a natural product. Their structures were elucidated by extensive NMR-spectroscopic analysis and HRESIMS data. The absolute configurations of all of the compounds were established by ECD calculations. Cytotoxicity evaluations of all of the compounds showed that compound 2 exhibited significant activity against the PC3 and HCT116 human-cancer-cell lines with IC50 values of 0.52 ± 0.03 and 8.3 ± 0.1 µM, respectively. Interestingly, compounds 2, 5, 7, and 8 exhibited moderate inhibition against the ROCK2 protein kinase with IC50 values from 7.0 ± 0.8 to 42 ± 3 µM.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Streptomyces
/
Alcaloides
/
Indolizidinas
Limite:
Humans
Idioma:
En
Revista:
J Nat Prod
Ano de publicação:
2018
Tipo de documento:
Article