简介：Thepresentstudywasdesignedtosynthesize2-Cyano-3,12-dioxooleana-1,9(11)-en-28-oate-13β,28-olide(1),alactonederivativeofoleanolicacid(OA)andevaluateitsanti-inflammatoryactivity.Compound1significantlydiminishednitricoxide(NO)productionanddown-regulatedthemRNAexpressionofiNOS,COX-2,IL-6,IL-1β,andTNF-αinlipopolysaccharide(LPS)-stimulatedRAW264.7cells.FurtherinvivostudiesinmurinemodelofLPS-inducedacutelunginjury(ALI)showedthat1possessedmorepotentprotectiveeffectsthanthewell-knownanti-inflammatorydrugdexamethasonebyinhibitingmyeloperoxidase(MPO)activity,reducingtotalcellsandneutrophils,andsuppressinginflammatorycytokinesexpression,andthusamelioratingthehistopathologicalconditionsoftheinjuredlungtissue.Inconclusion,compound1couldbedevelopedasapromisinganti-inflammatoryagentforinterventionofLPS-inducedALI.

简介：本文报道以Wistar雄性衰老早期(21—26月龄)及晚期(30—32月龄)大鼠为对象,用~3H—QNB为配基的受体放射配基结合分析法配对实验观察了衰老时脑M受体的变化。结果表明,衰老早期脑M受体已明显减少(早期减少7.5％,n=45对,晚期减少10.7％,n=14对)。哀老模型长期(6个月以上)小量饮服几种不同类型的补益中药(生地知母合剂,首乌,黄芪,附子肉桂合剂,仙灵脾肉苁蓉合剂),结果发现衰老早期生知显效,晚期黄芪显效。

简介：目的：研究人参皂苷M1酯化产物的结构。方法：用月桂酸、二亚胺与M1进行酯化反应,采用柱硅胶层析法分离纯化,利用IR,UPLC/QTOFMS和NMR（1D和2DNMR）等现代波谱技术手段鉴定了它们的结构。结果：分离得到了三种化合物,其中它们的结构分别为M1结构中葡萄糖单元3-OH,4-OH,6-OH位引入酯基。结论：在M1中葡萄糖单元上发生酰化反应,合成出三种新的M1衍生物。