RESUMEN
Three bibenzyls 1-3 and six other compounds 4-9 were firstly isolated from Dendrobium huoshanense stems. They were identified as 3',4-dihydroxy-3,5'-dimethoxybibenzyl(1), batatasin Ⅲ(2), 3,4'-dihydroxy-5-methoxy bibenzyl(3), dihydroconiferyl dihydro-p-coumarate(4), syringaresinol(5), 3-(4-hydroxyphenyl)-propionic acid ethyl ester(6),(3-ethylphenyl)-1,2-ethanediol(7),(S)-5-hydroxy-3,4-dimethyl-5-pentylfuran-2(5H)-one(8) and loliolide(9). Anti-inflammation assay showed that bibenzyls 1-3 could significantly inhibit the production of nitric oxide(NO) and the expression of tumor necrosis factor α(TNF-α) and interleukin 1β(IL-1β) mRNA in LPS-induced RAW264.7 macrophages. Mechanism study exhibited that the phosphorylation of nuclear factor kappa B(NF-κB) p65, inhibitor of κB(IκB), extracellular regulatedprotein kinase(ERK), c-Jun N-terminalkinase(JNK), p38 and Akt of LPS-induced RAW264.7 macrophages could be remarkably reduced by 1. These results suggested that the inflammatory response of LPS-induced RAW264.7 macrophages could be significantly inhibited by 1-3. Additionally, the anti-inflammatory effect of 1 might be contributed to its ability on the regulation of NF-κB, MAPKs and Akt signaling pathways.
Asunto(s)
Humanos , Antiinflamatorios , Usos Terapéuticos , Dendrobium , Inflamación , Quimioterapia , Lipopolisacáridos , Macrófagos , FN-kappa B , Óxido Nítrico , Óxido Nítrico Sintasa de Tipo IIRESUMEN
A structure kinetic model was established for describing the relationship among cell growth, genistein formation and substrate utilization in suspension culture of Maackia amurensis. In this model, sucrose uptake, structure components production, intermediate matter changes, cell respiration loss and secondary metabolite (genistein) production were all predicted. The parameter sensitivity test was indicated that intermediate matter self-catalysis rate constant (k(b1)), structure component synthesis rate constant (k(b2)) and secondary metabolite synthesis rate constant (k(p)) were the most sensitive parameters for this model. If k(b1), k(b2) or k(p) are changed by 10%, the range of the aim function value would be changed by 12.8%, 4.61% and 2.54%, respectively. Adjustment of the other parameters only aroused a change of less than 0.5% in the aim function value. The predicted values were in good agreement with those obtained experimentally.
Asunto(s)
Técnicas de Cultivo de Célula , Células Cultivadas , Cinética , Maackia , Biología Celular , Modelos BiológicosRESUMEN
<p><b>OBJECTIVE</b>To investigate the characteristics of growth, and water-soluble polysaccharide and total alkaloid accumulation in protocom-like bodies (PLBs) of Dendrobium huoshanenese in liquid culture system.</p><p><b>METHOD</b>PLBs were suspended in liquid medium and growth kinetics was analyzed. Water-soluble polysaccharide and total alkaloid content in PLBs were determined by colorimetry.</p><p><b>RESULT</b>PLBs were induced from stem explants of D. huoshanenese regenerants cultured on MS medium supplemented with NAA or NAA and KT at different concentrations. Basal MS medium was suitable for propagation of PLBs. When PLBs were suspended in liquid medium, mumax was 0.044.d-1, t(d) was 15.8 d and the optimum growth time was 4 weeks. Water-soluble polysaccharide and total alkaloid contents in PLBs were 3.75% and 0.0261%, respectively.</p><p><b>CONCLUSION</b>PLBs in liquid culture system show a potential for rapid growth and high metabolite synthesis, which provides possibility for exploiting resources of D. huoshanenese by large scale culture of PLBs.</p>