简介：ThesaponinginsenosideRk1isamajorcompoundisolatedfromginseng.GinsenosideRk1hasbeenreportedtohaveanti-inflammatoryandanti-tumorpropertiesandtobeinvolvedintheregulationofmetabolism.However,theeffectandmechanismofanti-inflammatoryactionofginsenosideRk1hasnotbeenfullyclarified.WeinvestigatedwhetherginsenosideRk1couldsuppresstheinflammatoryresponseinlipopolysaccharide-stimulatedRAW264.7macrophagesandtoexploreitsmechanismoftheaction.RAW264.7cellsweretreatedwithLPS(1μg×mL~(–1))intheabsenceorthepresenceofGinsenosideRk1(10,20,and40μmol×L~(–1)).ThentheinflammatoryfactorsweretestedwithGriessreagents,ELISA,andRT-PCR.TheproteinswereanalyzedbyWesternblotting.GinsenosideRk1inhibitedlipopolysaccharide-inducedexpressionofnitricoxide(NO),interleukin(IL)-6,IL-1β,tumornecrosisfactor(TNF)-α,andmonocytechemotacticprotein(MCP)-1.GinsenosideRk1inhibitedthelipopolysaccharide-stimulatedphosphorylationofNF-κBandjanuskinase(Jak)2andsignaltransducerandactivatoroftranscription(Stat)3atSer727andTyr705.ThesedatasuggestedthatginsenosideRk1couldinhibitexpressionofinflammatorymediatorsandsuppressinflammationfurtherbyblockingactivationofNF-κBandtheJak2/Stat3pathwayinLPS-stimulatedRAW264.7cells.

简介：目的：通过比较两种肥大细胞模型RBL-2H3和P815细胞激活后脱颗粒反应的差异,寻找早期、稳定、敏感的肥大细胞脱颗粒体外检测模型,为进一步建立基于细胞水平的过敏原和抗过敏药物的体外筛选模型提供一定的参考。方法：10μg·mL^-1C48/80激活细胞15-60min,比色法检测组胺、β-氨基己糖苷酶及类胰蛋白酶等过敏介质的释放,中性红染色法进行形态学观察,流式细胞法检测AnnexinV阳性细胞率。结果：C48/80刺激P815、RBL-2H3细胞15-60min后组胺释放率均明显增加,并且相同刺激条件下,两种细胞模型的组胺释放率基本相当。C48/80刺激P815细胞15min以上,β-氨基己糖苷酶释放率、类胰蛋白酶释放率、AnnexinV阳性细胞率和中性红染色脱颗粒细胞率均明显增加;但相同浓度的C48/80需刺激RBL-2H3细胞30-45min以上,上述指标才出现显著增加。在相同的刺激条件下,P815细胞过敏介质释放率、AnnexinV阳性率和脱颗粒率均高于RBL-2H3细胞。结论：同RBL-2H3相比,在相同刺激条件下,P815细胞活化后脱颗粒时间出现更早、程度更高。提示除RBL-2H3细胞,P815细胞也可作为一种早期、稳定、敏感的肥大细胞脱颗粒体外检测模型。

简介：目的：探讨陕重楼甾体皂苷类单体A（BM-26）豆甾醇-3-O-β-D-吡哺葡萄糖苷对人肝癌SMMC-7721细胞增殖的影响。方法：将不同浓度单体A（BM-26）与人肝癌SMMC-7721细胞分别在24、48、72h处理后，采用MTT法，测定吸光度A值，并计算细胞增殖抑制率，检测陕重楼甾体皂苷类单体A（BM-26）对肿瘤细胞增殖的影响。结果：不同质量浓度陕重楼甾体皂苷类单体A（BM-26）对人肝癌SMMC-7721细胞均有抑制作用：24h处理时，质量浓度为8、40、200μg·ml^-1，1、5、25mg·mL^-1组与对照绀相比较，吸光度A值有显著性降低（P〈0．01或P〈0．05）；48h处理时，质量浓度为0．3、1．6、8、40、200μg·mL^-1，1mg·mL^-1组与对照组相比较，吸光度A值有显著性降低（P〈0．01或P〈0．05）；72h处理时，质量浓度为8、40性g·mL^-1组与对照组相比较，吸光度A值有显著性降低（P〈0．01或P〈0．05）。其中质量浓度为8μg·ml^-1时，在24、48、72h抑制率分别为45％、41％、36％。结论：陕重楼单体A（BM-26）对人肝癌SMMC-7721细胞增殖具有一定的抑制作用，甘‘最蛆抑制质量浓度为8μg·mL^-1，有效抑制质量浓度范围是8～40μg·mL^-1。

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.