简介:目的:为探索寻找新型心血管药物候选化合物,设计合成了一系列全新结构的异色满-4-酮肟醚类衍生物。方法:首先设计合成了天然降压活性产物3-甲基-7,8-二羟基异色满-4-酮(XJP)的类似物3和6,然后通过醚键在肟羟基上引入经典伊受体阻断剂侧链异丙醇胺基团,合成了一系列异色满-4-酮肟醚类新化合物;采用离体大鼠左心房测试了目标化合物对β-肾上腺素受体的阻断作用。结果:获得了20个具有肟醚异丙醇胺结构的目标化合物;其夙一受体的阻断活性测试结果表明,化合物Ic活性最强,在10^-7mol·L^-1浓度下对β1-受体的抑制率为52.2%,优于阳性药普萘洛尔(49.7%);初步获得了构效关系信息。结论:对活性天然产物XJP结构修饰的结果可为新型心血管药物分子设计提供研究思路。
简介:目的:研究黄连(CoptischinensisFranch.)的化学成分。方法:采用色谱技术进行分离,通过NMR等波谱技术确定化合物的结构。结果:从黄连乙醇提取物中分离得到了7个异喹啉类生物碱,分别鉴定为8-oxyberberine(1),8-oxocoptisine(2),8-oxo-epiberberine(3),6-([1,3]dioxolo[4,5-g]isoquinoline-5-carbonyl)-2,3-dimethoxy-benzoicacidmethylester(4),corydaldine(5),noroxyhydrastineine(6)和6,7-methylenedioxy-1(2H)-isoquinolinone(7)。结论:化合物1-7均系首次从该植物中分离得到。
简介:Inthepresentstudy,aseriesofnovelnitricoxide-hydrogensulfidereleasingderivativesof(S)-3-n-butylphthalide((S)-NBP)weredesigned,synthesized,andevaluatedaspotentialantiplateletagents.CompoundNOSH-NBP-5displayedthestrongestactivityininhibitingthearachidonicacid(AA)-andadenosinediphosphate(ADP)-inducedplateletaggregationinvitro,with3.8-and7.0-foldmoreeffectivenessthan(S)-NBP,respectively.Furthermore,NOSH-NBP-5couldreleasemoderatelevelsofNOandH2S,whichwouldbebeneficialinimprovingcardiovascularandcerebralcirculation.Moreover,NOSH-NBP-5couldrelease(S)-NBPwhenincubatedwithratbrainhomogenate.Inconclusion,thesefindingsmayprovidenewinsightsintothedevelopmentofnovelantiplateletagentsforthetreatmentofthrombosis-relatedischemicstroke.
简介:目的:观察甘草次酸对哮喘大鼠气道炎症、气道重塑及肺组织Casepase-3、Bax、Bcl-2表达的影响,探讨其抗哮喘机制。方法:将60只雄性大鼠随机分为正常对照组、哮喘模型组、地塞米松组及甘草次酸(200、100、50mg/kg)剂量组。以卵清蛋白加氢氧化铝致敏复制大鼠哮喘动物模型,病理观察甘草次酸对哮喘大鼠肺组织气道炎症浸润和气道重塑的影响;采用RT-PCR和Western-blot法检测哮喘大鼠肺组织Casepase-3、Bax及Bcl-2mRNA和蛋白表达。结果:与哮喘模型组比较,甘草次酸200mg/kg可减少哮喘大鼠肺组织炎症浸润,改善或逆转气道重塑;甘草次酸200、100mg/kg可上调哮喘大鼠肺组织Bax、Caspase-3mRNA和蛋白表达水平,下调Bcl-2mRNA和蛋白表达水平。结论:甘草次酸对哮喘大鼠气道炎症及气道重塑有较好的改善作用,其机制可能与上调促凋亡因子Bax、Caspase-3和下调抗凋亡因子Bcl-2有关。
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: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:Thymoquinone(TQ),anactivecomponentderivedfromthemedialplantNigellasativa,hasbeenusedformedicalpurposesformorethan2000years.RecentstudieshavereportedthatTQblockedangiogenesisinanimalmodelandreducedmigration,adhesion,andinvasionofglioblastomacells.WehaverecentlyshownthatTQcouldexhibitapotentcytotoxiceffectandinduceapoptosisinmouseneuroblastoma(Neuro-2a)cells.Inthepresentstudy,TQtreatmentmarkedlydecreasedtheadhesionandmigrationofNeuro-2acells.TQdown-regulatedMMP-2andMMP-9proteinexpressionandmRNAlevelsandtheiractivities.Furthermore,TQsignificantlydown-regulatedtheproteinexpressionoftranscriptionfactorNF-κB(p65)butnotsignificantlyalteredtheexpressionofN-Myc.Takentogether,ourdataindicatedthatTQ'sinhibitoryeffectonthemigrationofNeuro-2acellswasmediatedthroughthesuppressionofMMP-2andMMP-9expression,suggestingthatTQtreatmentcanbeapromisingtherapeuticstrategyforhumanmalignantneuroblastoma.
简介:槐果碱可明显升高正常大鼠血浆6-酮-PGF1a含量,对TXB2无明显影响。小剂量(1mg/100g)阿斯匹林轻度降低血浆6-酮-PGF1a含量,但明显阻断槐果碱升高6-酮-PGF1a的作用。