简介：目的：寻找断节参中具有抑制α-葡萄糖苷酶活性的成分。方法：采用体外抑制α-葡萄糖苷酶活性模型进行追踪,用各种色谱法分离,根据理化性质和谱学数据鉴定结构,筛选出活性较强的单体化合物并进行酶活性抑制动力学研究。结果：断节参乙醇提取物的乙酸乙酯溶性部位具有显著的抑制α-葡萄糖苷酶活性,从中分离出3个化合物,其中断节参苷H和青阳参苷B两个皂苷类化合物具有较强抑制α-葡萄糖苷酶活性,IC50分别为21.90、35.32mg·L-1,明显高于阳性对照药阿卡波糖（IC50=1017.41mg·L-1）。酶活性抑制动力学反应结果表明,两个皂苷对α-葡萄糖苷酶的抑制类型均为非竞争性抑制剂。结论：断节参苷H和青阳参苷B为首次报道对α-葡萄糖苷酶有抑制活性。

简介：Thepresentstudywasdesignedtoinvestigatetheanti-sepsiseffectsofphyscion8-O-β-glucopyranoside(POG)isolatedfromRumexjaponicasandexploreitspossiblepharmacologicalmechanisms.POGwasextractedfromR.japonicasbybioactivity-guidedisolationwiththeanti-sepsisagents.SurvivalanalysisinsepticmouseinducedbyLPSandheat-killedEscherichiacoliwereusedtoevaluatetheprotectiveeffectofPOG(40mg·kg~(-1),i.p.)onsepsis.CytokinesincludingTNF-α,IL-1βandIL-6inRAW264.7cellsinducedbyLPS(100ng·mL~(-1))weredeterminedbyELISA.Inaddition,theproteinsexpressionsofTLR2andTLR4weredeterminedbyWesternblottingassay.OurresultsdemonstratedthatPOG(40mg·kg~(-1),i.p.)possessedsignificantprotectiveactivityontheendotoxemicmice.ThePOGtreatment(20,40,and80μg·mL~(-1))significantlydecreasedtheTNF-α,IL-1βandIL-6inducedbyLPS(P<0.01)inaconcentration-dependentmanner.Furthermore,theTLR4andTLR2proteinswerealsodown-regulatedbyPOGat20(P<0.01),40(P<0.01),and80μg·mL~(-1)(P<0.01).ThepresentstudydemonstratedthatthePOGextractedfromR.japonicaspossessedsignificantanti-sepsiseffectonendotoxemicmice,andcanbedevelopedasanoveldrugfortreatingsepsisinthefuture.

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：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：应用ITS2序列对朱砂根及其混伪品进行鉴定研究，为中药临床准确用药、市场规范化管理等提供依据和保障。方法：对朱砂根及其混伪品进行DNA提取、PCR扩增ITS2序列、双向测序，对序列进行比对、计算遗传距离。结果：朱砂根ITS2序列长度为217bp，种内有10个变异位点，有9种单倍型，平均G＋C含量为59.1%，除变种红凉伞外，朱砂根与其各混伪品的种间最小遗传距离均大于朱砂根种内最大遗传距离，所以利用ITS2序列可以鉴别朱砂根及其混伪品。结论：实验结果表明ITS2序列可以鉴别朱砂根及其混伪品，但对于其与变种的关系需进一步研究。

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.