简介：目的:合成和表征O-羧甲基-N-半乳糖化壳聚糖衍生物作为潜在的肝靶向基因载体.方法:以天然聚合物壳聚糖为原料,首先制备得O-羧甲基壳聚糖,然后在其2-NH2上和乳糖酸反应,制得O-羧甲基-N-乳糖酰化壳聚糖;或与乳糖反应,用KBH4还原,制得O-羧甲基-N-乳糖胺化壳聚糖.结果与结论:分别用FT-IR、1HNMR、13CNMR和元素分析对其进行了表征.用粉末X-衍射、DSC、TG对其物理性质进行了分析.制得的O-羧甲基-N-乳糖酰化壳聚糖O-羧甲基-N-乳糖胺化壳聚糖有望作为潜在的肝靶向基因载体.

简介：目的：探索14-O-取代冬凌草甲素衍生物的合成及其抗肿瘤活性。方法：将二酸酐与冬凌草甲素14位羟基缩合,再与氨基酸酯进行酰胺化反应,合成14-O-取代冬凌草甲素衍生物;采用MTT法测试所有目标化合物体外对肿瘤细胞株（BGC-7901,SW-480,HL-60,BEL-7402,A549和B16）的细胞毒性以及化合物2c和2d对小鼠H22肝癌在体抗肿瘤活性。结果：合成了10个新的目标化合物,其结构均经IR,MS及1HNMR确证;生物活性初筛结果显示,化合物2c,2d和3e有较强的细胞毒活性;化合物2c和2d在体抗肿瘤活性大于环磷酰胺和冬凌草甲素。结论：14-O-取代冬凌草甲素衍生物2c,2d和3e作为潜在的抗肿瘤候选化合物值得进一步深入研究。

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：在忍冬装饰用的梨树花的di-O-caffeoylquinic酸(diCQAs)的三种类型的抗菌剂活动，繁体中文药(TCM)，在杆菌shigae上，生长被microcalorimetry调查并且比较。diCQAs的三种类型是3，4-di-O-caffeoylquinic酸(3，4-diCQA)，3，5-di-O-caffeoylquinic酸(3，5-diCQA)，并且4，5-di-O-caffeoylquinic酸(4，5-diCQA)。新陈代谢的力量时间上的三diCQAs的效果的质、量的信息弄弯的一些，生长率常数k，最大的热产量力量下午，和产生预定tG，全部的热产量Qt，和生长禁止的比率我B。shigae是计算的。根据一个thermo运动的模型，k，下午，Qt，我和c的相应量的关系被建立。另外，这些药(IC50)的一半禁止的集中被定量分析获得。基于数量活动关系和IC50价值，禁止的活动的顺序是3，5-diCQA>4，5-diCQA>3，4-diCQA。结果说明在C-5的caffeoyl酉旨组是为细菌的房间有一种更高的亲密关系的主要的组的可能性，并且二caffeoyl酉旨的intramolecular距离组织，这也在diCQAs的抗菌剂活动有重要影响。

简介：Houttuyniacordatapolysaccharide(HCP)isextractedfromHouttuyniacordata,akeytraditionalChinesemedicine.ThestudywastoinvestigatetheeffectsofHCPonintestinalbarrierandmicrobiotainH1N1virusinfectedmice.MicewereinfectedwithH1N1virusandorallyadministratedHCPatadosageof40mg(kg^-1(d^-1.H1N1infectioncausedpulmonaryandintestinalinjuryandgutmicrobiotaimbalance.HCPsignificantlysuppressedtheexpressionofhypoxiainduciblefactor-1αanddecreasedmucosubstancesingobletcells,butrestoredthelevelofzonulaoccludens-1inintestine.HCPalsoreversedthecompositionchangeofintestinalmicrobiotacausedbyH1N1infection,withsignificantlyreducedrelativeabundancesofVibrioandBacillus,thepathogenicbacterialgenera.Furthermore,HCPrebalancedthegutmicrobiotaandrestoredtheintestinalhomeostasistosomedegree.TheinhibitionofinflammationwasassociatedwiththereducedlevelofToll-likereceptorsandinterleukin-1βinintestine,aswellastheincreasedproductionofinterleukin-10.OraladministrationofHCPalleviatedlunginjuryandintestinaldysfunctioncausedbyH1N1infection.HCPmaygainsystemictreatmentbylocalactingonintestineandmicrobiota.Thisstudyprovedthehigh-valueapplicationofHCP.

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：研究何首乌不同炮制品含药血清对H2O2诱导PC12细胞损伤的保护作用。方法：将何首乌生品、清蒸品、黑豆汁蒸品按20g/kg剂量小鼠灌胃给药,分别将其含药血清分别分成20%、10%、5%含药血清组,采用MTT法测定其对正常PC12细胞增殖的影响和对H2O2致PC12细胞损伤的保护作用,并用比色法测定SOD活性、LDH和MDA含量。结果：何首乌不同炮制品含药血清对正常PC12细胞增殖均无明显影响,含何首乌生品、黑豆汁蒸品各浓度血清和10%,5%含清蒸品血清可显著增强受损细胞内SOD活性（P〈0.05-0.01）;10%,5%含生品血清、含黑豆汁蒸品各浓度血清和10%含清蒸品血清能明显降低受损细胞LDH释放量（P〈0.05-0.01）;含清蒸品各浓度血清和20%,5%含黑豆汁蒸品血清能降低受损细胞的MDA释放量（P〈0.05）,而含生品各浓度血清对细胞内MDA水平无显著降低作用。结论：含何首乌黑豆汁蒸品和清蒸品血清对H2O2致PC12细胞损伤有保护作用。

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：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.