RESUMO
Culcitiolides E-J (1-6), six new eremophilane-type sesquiterpenes, were isolated from the stem of Senecio culcitioides SCH. BIP. (Asteraceae). The structures were determined by detailed NMR spectral analysis. The inhibitory activities of these compounds against nuclear factor κB (NF-κB)-dependent gene expression were assessed. Culcitiolides E, H, and I potently inhibited NF-κB-induced gene expression at 20 µM.
Assuntos
NF-kappa B/antagonistas & inibidores , Naftalenos/química , Naftalenos/farmacologia , Senécio/química , Sesquiterpenos/química , Sesquiterpenos/farmacologia , Regulação da Expressão Gênica/efeitos dos fármacos , Células HeLa , Humanos , NF-kappa B/metabolismo , Naftalenos/isolamento & purificação , Caules de Planta/química , Sesquiterpenos Policíclicos , Sesquiterpenos/isolamento & purificaçãoRESUMO
Four new eremophilane-type sesquiterpenes, culcitiolides A-D, were isolated from the stem of Senecio culcitioides Sch. Bip (Asteraceae). Their structures were established by detailed 2D NMR spectroscopic and single-crystal X-ray experiments. These compounds were assessed for inhibitory activity against nuclear factor kappaB (NF-kappaB). Culcitiolides C and D at 20 microM showed 97 and 100% inhibition of NF-kappaB activity, respectively.
