简介:ThefruitsofPaulowniacatalpifoliaGongTongareusedasaChinesefolkherbalmedicineforthetreatmentofenteritis,tonsillitis,bronchitis,anddysentery,etc.OurpreviousstudyhasidentifiednewC-geranylatedflavanoneswithobviousanti-proliferativeeffectsinlungcancerA549cells.Inthepresentstudy,anewC-geranylatedflavone,paucatalinoneC(1)andfiveknownC-geranylatedflavanones(2-6)wereisolated.Inaddition,atotalof34C-geranylatedflavonoidsweredetectedbyHPLC-DAD-ESI-MS/MScouplingtechniquesfromtheCH_2Cl_2extractofP.catalpifolia.Futhermore,anti-agingeffectsofisolatedcompoundswereevaluatedinvitrowithprematuresenescent2BScellsinducedbyH_2O_2.PhytochemicalresultsindicatedthatP.catalpifoliawasanaturalresourceofabundantC-geranylatedflavonoids.Diplacone(3)andpaucatalinoneA(5)werethepotentanti-agingagentsintheprematuresenescent2BScellsinducedbyH_2O_2andtheC-geranylsubstituentmaybeanimportantfactorbecauseofitslipophiliccharacter.
简介:目的:筛选文冠果壳的抗氧化及抑制肝癌HepG2细胞增殖活性部位。方法:用水,10%、30%、50%、70%、95%乙醇水溶液从文冠果中提取得到A、B、C、D、E和F提取物,用清除自由基DPPH·能力筛选抗氧化活性部位,用MTT法筛选抑制肝癌细胞增殖的活性部位。结果:6个提取部位均有抗氧化活性和抑制HepG2细胞增殖作用,其中E(70%乙醇水提取)部位的抗氧化活性最强,当质量浓度为0.2mg·mL-1时,其对DPPH·清除率能达到70.82%;提取部位F(95%乙醇水提取)抑制HepG2细胞增殖作用最强,当其质量浓度为75μg·mL-1时,抑制率高达70.1%。结论:文冠果壳提取物具有抗氧化及抑制人HepG2增殖活性,具有开发前景。
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: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:目的:对条叶龙胆根和根茎化学成分进行研究。方法:采用色谱技术针对性地获得酮类化合物,采用ESI-MS和NMR对化合物结构进行鉴定。结果:从该植物中获得9个化合物,分别被鉴定为acremoxanthoneD(1),sporormielloside(2),artomandin(3),oliganthaxanthoneA(4),oliganthaxanthoneB(5),pinetoxanthone(6),polyhongkongenosideA(7),1,5-dihydroxy-2,3,4-trimethoxyxanthone(8)和bannaxanthoneI(9)。活性筛选表明化合物1,2,5和9能抑制脂多糖所致巨噬细胞一氧化氮生成,IC50值分别为10.8、5.7、12.5、6.8μmol·L^-1。结论:化合物1~9首次从龙胆属植物中分离得到。
简介:目的:建立同时测定不同产地半枝莲中野黄芩苷、黄芩苷、野黄芩素、异野黄芩素、木犀草素、芹菜素、黄芩素和汉黄芩素含量的高效液相色谱法。方法:采用AgilentZORBAXSB-C18色谱柱(250mm×4.6mm,5μm),以乙腈-0.1%甲酸水为流动相,梯度洗脱,检测波长:350nm,流速:1.0mL·min^-1,柱温:25℃。结果:半枝莲药材中野黄芩苷、黄芩苷、野黄芩素、异野黄芩素、木犀草素、芹菜素、黄芩素和汉黄芩素分别在7.23~72.32、3.28~32.76、2.35~23.53、2.54~25.37、1.77~17.65、2.26~22.57、1.95~19.48、3.52~35.24μg呈良好线性关系,相关系数r在0.9983~0.9999,平均加样回收率为98.9%~99.9%。结论:该方法简单、快速,为半枝莲的质量控制提供了参考。
简介:目的:建立超高效液相色谱三重四极杆串联质谱法(UPLC-MS/MS)同时测定不同产地吊石苣苔中4个苯乙醇苷类成分的方法,分析比较不同产地吊石苣苔中苯乙醇苷含量差异。方法:采用ACQUITYUPLCBEHC18色谱柱(100mm×2.1mm,1.8μm);以0.1%甲酸-水(A)-0.1%甲酸乙腈(B)溶液为流动相,梯度洗脱,体积流量为0.5mL·min^-1;柱温为40℃,采用电喷雾离子源,负离子检测方式,得到相应的提取离子流图。结果:不同产地吊石苣苔中4个苯乙醇苷含量有明显差异,结论:该方法操作简便、准确、重复性好,对寻找高含量苯乙醇苷的资源植物及产地具有重要的理论指导意义。
简介:目的:考察玉龙散中乌头碱的透皮吸收过程。方法:采用HPLC-MS/MS技术建立SD大鼠皮肤微透析液中乌头碱含量的测定方法。通过考察微透析技术中对乌头碱体内回收率的影响因素,确定采样条件。经皮给药后,考察乌头碱的局部透皮吸收过程。结果:本实验成功建立了HPLC-MS/MS测定微透析样品中乌头碱含量的方法。微透析采样流速选择1.5μL·min^-1,采样间隔为30min。乌头碱的AUC为18973.27h·ng·mL^-1,MRT为14.97h,Cmax为2976.38ng·mL^-1,Tmax为11.76h。结论:微透析采样技术可用于玉龙散中乌头碱的透皮吸收过程研究。
简介:目的:比较不同产地及生炒酸枣仁的蛋白质电泳结果,分析它们之间的共性和差异。方法:本实验采用垂直平板聚丙烯酰胺凝胶电泳(PAGE)的技术对40个不同酸枣仁样品进行分析评价。结果:根据电泳指纹图谱整理分析的数据得到对酸枣仁的初步聚类分析结果。结论:聚丙烯酰胺凝胶电泳可以大致定性区别不同产地的酸枣仁样品。