简介:摘要目的研究花椒提取物(ZBME)诱导肝癌细胞凋亡作用及其分子机制。方法以肝癌细胞株HepG2细胞为研究对象,分为对照组和花椒提取物组。对照组不做处理,花椒提取物组以8μg/mL的ZBME处理HepG2细胞,采用CCK-8法检测细胞增殖;流式细胞技术检测细胞凋亡;qRT-PCR检测HO-1、NQO1、AREmRNA表达。结果花椒提取物组细胞增殖显著低于对照组,细胞凋亡显著高于对照组(P<0.01);花椒提取物组HO-1、NQO1、AREmRNA表达较对照组显著升高(P<0.05)。结论ZBME能够诱导肝癌细胞凋亡和抑制增殖,ZBME抗癌作用可能通过激活Nrf2/ARE信号通路实现。
简介:目的探究微小RNA-29a(miR-29a)靶向调控干扰素诱导跨膜蛋白3(IFITM3)表达对肝癌HepG2细胞生长、增殖和凋亡的影响。方法采用实时荧光定量PCR(qRT-PCR)检测肝癌细胞HepG2和正常肝细胞株LO2中miR-29a的表达水平;采用脂质体法将miR-29aminmic及阴性对照转染至HepG2细胞,并分为过表达组和对照组,转染48h后用QRCR法检测两组miR-29a水平;采用MTT法和流式细胞术检测各组细胞增殖及凋亡情况;Westernblotting检测各组Bax、caspase-3凋亡相关基因及IFITM3的表达;采用双荧光素酶报告基因实验验证miR-29a对IFITM3的靶向调控作用。结果肝癌HepG2细胞miR-29a水平低于正常LO2细胞(P﹤0.05);过表达组HepG2细胞miR-29a表达低于对照组(P﹤0.05);过表达组HepG2细胞增殖率低于对照组(P﹤0.05),凋亡率及Bax、caspase-3、IFITM3表达高于对照组(P﹤0.05);miR-29a可显著抑制野生型FITM3-3'UTR质粒转染细胞的荧光素酶活性(P﹤0.05),但其对突变型FITM3-3'UTR质粒转染细胞的荧光素酶活性无显著影响(P﹥0.05)。结论miR-29a在肝癌中表达降低,可靶向调控IFITM3表达,抑制肝癌细胞生长、增殖,并促进其凋亡,可作为肝癌的潜在治疗靶点。
简介:通过三步合成(E)-二(对3-硝基苯甲酸)乙烯(C16H10N2O8)配体,并由此通过溶剂热法合成金属有机框架材料Zn2(EBNB)2(BPY)2·2H2O;采用x射线单晶衍射分析、红外光谱(IR)和热重分析(TG)等对所得结构进行表征,并测试其荧光性能;以洛贝林为模型药物,研究了Zn2(EBNB)2(BPY)2·2H2O对该药物的载药及体外释药性能。研究结果说明,Zn2(EBNB)2(BPY)2·2H2O对洛贝林的最高载入量达0.355g/g,载药体系的体外释药为明显的两相模式。体外细胞毒性实验结果表明,Zn2(EBNB)2(BPY)2·2H2O具有良好的生物相容性。
简介:andthereductionofpublicandsocialexpenses.Economistsmaynotnecessarilysharetheeconomicandsocialinterestsofthetruebelieversandmayhaveavarietyofindividualpsychicstatesregardingtheeconomicandsocialeffectsoftheutopiawhichtheycloakwithmathematicalreason.Nevertheless,orbetteryetthesupranationalstate-aEuropeanstateonthewaytowardaworldstate-capableofeffectivelycontrollingandtaxingtheprofitsearnedinthefinancialmarketsand,onreservesofsocialcapitalthatprotectanentireportionofthepresentsocialorderfromfallingintoanomie.Thissocialcapitalisfatedtowitheraway-althoughnotintheshortrun-ifitisnotrenewedandreproduced.Butthesesameforcesof"conservation"
简介:Therearepowerfulpoliticalobstaclesbetweenpeople.Themainobstaclescomefromthesocialdemocraticmovement.IfwesucceedinovercomingtheseitwillleadtoagenuineThirdWaywhichwillbemuchmoreradical.Weneedtobuildtheleftoftheleft.Intheecologymovementyouhavepeoplewhoarereallyontheleft--evenamongtheCommunistParty,InFrancewehavethistraditionofworkerismwhichisanti-intellectual.Theunionsareveryhostiletointellectualsandtheintellectualsareverydistantfromworkers.In1968itwasveryvisible.NowforthefirsttimebecauseofthefailureofSovietMarxismwearefreefromthat.SoIcanspeakwithaCGTofficialasIamspeakingtoyou.Theyareveryopen.Inasenseintellectualslikemedidnotexist20yearsago.PeoplelikeSartreandFoucaultweresympathetictothemovement,Forcesotherthantheleftaretryingtogainahearing.SoweseetheHaiderphenomenoninAustria.Buthehasnotgoneunchallenged.TherecreationofatrueleftwingmovementwillbethemaininstrumentofthedestructionofHaider.NobodyspokeaboutLePenandtheNationalFrontinFranceduringthehotwinterof1995inFrance.ThemassmovementindefenceofpensionsinItalyalsomarginalisedthefarright.
简介:通过涂覆热分解法制备了Ti/RuO2-ZrO2-SnO2、Ti/RuO2电极材料,采用X射线衍射(XRD)、扫描电镜(SEM)和循环伏安(CV)对电极材料进行表征,考察了电流密度、NaCl质量浓度、pH值及电极间距对废水COD降解率的影响。结果表明,Ti/RuO2-ZrO2-SnO2电极对COD具有更高的降解率,对其进行工艺优化。电极材料对废水降解的最佳工艺条件为电流密度40mA/cm^2,NaCl质量浓度4g/L,pH=5.0,电极间距10mm,COD的降解率达到90.5%。Ti/RuO2-ZrO2-SnO2电极中SnO2与RuO2生成固溶体,有利于增强涂层与基体之间的结合力,提高电极的稳定性;ZrO2起到细化晶粒的作用,致使电极表面粗糙度增加,增强了电极的电催化性能,且降解过程符合一级动力学模型。
简介:A60%Fe/Al2O3catalystwaspreparedbytheco-precipitationmethod.ItwasreducedbyH2toproducemetallicFe,whichwasthensulfidedbyCS2toFe0.96SandFe3S4orphosphidedbytriphenylphosphine(PPh3)inliquidphasestoFe2PandFeP.Itwasfoundthattheironsulfides(Fe0.96SandFe3S4)exhibitedthelowactivityforthehydrodesulfurization(HDS)reactions.TheHDSactivitywasalsolowontheFe(metal)/Al2O3andFe2P/Al2O3catalystssincetheywereconvertedintoFe0.96SandFe3S4duringtheHDSreactions.Incontrast,theFeP/Al2O3wasfoundtobestableandactivefortheHDSreactions.Inparticular,FeP/Al2O3possessedsignificantlysmallerFePparticlesthanFeP/C,leadingtothesignificanthigherHDSactivityofFeP/Al2O3thanFeP/C.