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。
简介:目的:通过人的黑色素细胞实验研究珍珠水解液的美白作用机理。方法:NaOH法测定黑色素细胞黑色素含量,实时荧光定量PCR法(RT-PCR)测定珍珠水解液对影响黑色素合成的相关基因酪氨酸酶基因(TYR)、酪氨酸酶相关蛋白1(TRP1)及影响黑色素转运的相关基因小眼畸形相关转录因子(MITF)。结果:浓度为0.25%、0.5%、0.75%的珍珠水解液可以抑制黑色素细胞的黑色素合成,3种浓度下的珍珠水解液均可抑制相关基因TRP1mRNA的表达,0.25%浓度下可抑制TYR、TRP1及MITF的mRNA的表达。结论:珍珠水解液主要通过抑制黑色素合成过程中TRP1mRNA的表达,从而抑制黑色素合成而发挥美白功效。
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:高剂量为10g·kg^-1)4周,进行负重力竭游泳实验,记录小鼠力竭游泳时间;同时测定给药4周后小鼠运动90min后全血乳酸(LA)含量、血浆乳酸脱氢酶(LDH)活性,血浆尿素氮(BUN)含量,肝糖原(LG)含量。结果:与空白对照组比较四种不同产地的蒙古黄芪均可显著延长小鼠力竭游泳时间(P〈0.05),各低剂量组力竭游泳时间分别为:浑源组522.0±81.5s、武川组613.4±55.7s、土右野生组508.2±61.0s、土右栽培组484.5±40.7s,高剂量组力竭游泳时间分别为:浑源组599.7±48.6s、武川组790.3±57.1s、土右野生组575.7±73.7s、土右栽培组544.1±74.9s,相同剂量进行比较发现武川组游泳时间较其他组显著延长(P〈0.05),其余各组间无统计学差异;四组黄芪均可增加小鼠运动后肝糖原含量,各低剂量组肝糖原含量分别为:浑源组26.81±1.04mg·g^-1、武川组31.67±2.87mg·g^-1、土右野生组22.31±2.38mg·g^-1、土右栽培组22.96±1.95mg·g^-1,各高剂量组肝糖原含量分别为:浑源组30.89±3.35mg·g^-1、武川组39.56±3.44mg·g^-1、土右野生组29.52±1.43mg·g^-1、土右栽培组28.41±2.06mg·g^-1;同时四个产地黄芪均可显著降低运动后小鼠血液乳酸、尿素氮含量,增加乳酸脱氢酶活性(P〈0.05)。结论:四种产地蒙古黄芪均具有显著的抗疲劳作用,其中以内蒙古武川产黄芪药效最好,浑源和土右黄芪作用次之。
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.