简介:本研究旨在探讨乙酰基-11-酮基-β乳香酸(3-O-acetyl-11-keto-β-boswellicacid,AKBA)对人髓系白血病细胞株HL-60细胞生长、增殖、凋亡及细胞周期的影响。用不同浓度AKBA处理对数生长期HL-60细胞;采用MTT法评价AKBA对HL-60细胞株生长的抑制作用;采用Hochest33342染色观察细胞的形态学变化;Annexin-V-FITC/PropidiumIodide(PI)双染法结合流式细胞术检测细胞凋亡率;采用PI单标法结合流式细胞术检测AKBA对HL-60细胞周期进程的影响。结果表明:AKBA对HL-60细胞增殖有抑制作用。当AKBA浓度增大时,AKBA诱导的细胞凋亡效应也有所增强。AKBA使细胞周期发生变化,导致S期细胞减少,G1期细胞增多。结论:AKBA对HL-60细胞具有抗增殖和诱导细胞凋亡的作用,在急性髓系白血病治疗领域有良好前景。
简介:摘要目的研究人急性白血病细胞株(HL-60)上清液对人脐静脉内皮细胞(humanumbilicalveinendothelialcell,HUVECs)血管形成能力的影响。方法以单独培养HUVECs为对照组,以HUVECs加HL-60细胞培养上清为实验组。采用MTT比色法分别在24h、48h、72h检测两组中HUVECs的吸光值;采用RT-PCR技术检测两组中HUVECs周期蛋白E(cyclinE)mRNA及血管内皮生长因子(VEGF)mRNA的表达情况。结果实验组与对照组相比HUVECs增殖速度加快,72小时后差异有显著性意义(p〈0.05)。72小时后,实验组中HUVECsCyclinEmRNA及VEGFmRNA表达明显增加,与对照组相比差异具有显著性意义(p〈0.01)。结论HL-60细胞培养上清液能够增强HUVECs的血管形成能力。
简介:Apoptosismanifestsintwomajorexecutionprogramsdownstreamofthedeathsignal:thecaspasepathwayandorganelledysfunction.Animportantantiapoptosisfactor,Bcl-2protein,contributesincaspasepathwayofapoptosis.Calcium,animportantintracellularsignalelementincells,isalsoobservedtohavechangesduringapoptosis,whichmaybeaffectedbyBcl-2protein.WehavepreviouslyreportedthatinHarringtonine(HT)inducedapoptosisofHL-60cells,there'schangeofintracellularcalciumdistribution,ovingfromcytoplastespeciallyGolgi'sapparatustonucleusandaccumulatingtherewiththehighestconcentration.Wereportherethatcaspase-3becomesactivatedinHT-inducedapoptosisofHL-60cells,whichcanbeinhibitedbyoverexpressionofBcl-2protein.NosignofapoptosisorintracellularcalciummovementfromGolgi'sapparatustonucleusinHL-60cellsoverexpressingBcl-2ortreatedwithAc-DEVD-CHO,aspecificinhibitorofcaspase-3.Theresultsindicatethatactivatedcaspase-2canpromotethemovementofintracellularcalciumfromGolgi'sapparatustonucleus,andtheprocessisinhibitedbyAc-DEVD-CHO(inhibitorofcaspase-3),andthatBcl-2caninhibitthemovementandaccumulationofintracellularcalciuminnucleusthroughitsinhibitiononcaspase-3.Calciumrelocalizationinapoptosisseemstobeirreversible,whichisdifferentfromtheintracellularcalciumchangescausedbygrowthfactor.
简介:目的:研究柔红霉素(Daunorubicin,DNR)对人急性早幼粒细胞白血病(APL)细胞株HL-60细胞中干扰素调节因子1(IRF1)-mRNA、干扰素调节因子8(IRF8)-mRNA、干扰素调节因子9(IRF9)-mRNA表达的影响。方法将HL-60细胞株设为HL-60组、HL-60+DNR组,同时取3例正常人外周血白细胞为NC组。HL-60组为未加药处理组,HL-60+DNR组为小剂量DNR持续作用HL-60细胞10d。采用实时荧光定量聚合酶链反应(RT-PCR)法检测IRF1-mRNA、IRF8-mRNA、IRF9-mRNA转录水平,每组实验重复3次。结果与NC组相比,IRF1-mRNA、IRF8-mR-NA转录水平在HL-60组显著下调(P〈0.05),而HL-60+DNR组显著上调(P〈0.05);与NC组相比,IRF9-mRNA转录水平在HL-60+DNR显著上调(P〈0.05),在HL-60组则表现为下调,但无统计学差异(P〉0.05)。结论DNR可上调HL-60细胞中的IRF1、IRF8、IRF9表达水平。APL经DNR治疗后,可能通过上调IRF1、IRF8、IRF9的表达诱导白血病细胞的凋亡,促进其成熟,促进病情的缓解。
简介:Objective:Toexploretheeffectsofdexamethasone(DXM)andvincristine(VCR)oncytosinearabinoside(Ara-C)inducedapoptosisandactivationofnuclearfactor-κ-genebinding(NF-κB)inleukemiccelllineHL60-n.Methods:ApoptosisofHL60-ncellswasanalysedbyTdT-mediatedX-dUTPnickandendlabeling(TUNEL)andDNAelectrophoresis.NF-κBactivityofHL60-ncellswasdetectedbyelectrophoreticmobilityshiftassay(EMSA).Results:TherewasslightactivationofNF-κBinHL60-ncellswithoutdruginduction.Ara-Cat1μmol/LsignificantlyenhancedtheactivationofNF-κBinHL60-ncells.ThelevelofNF-κBactivationinducedbyDXMat1μmol/LorVCRat0.1μmol/Lhadnosignificantdifferencecomparedwiththatofthecontrolgroup.However,inHL60-ncellspre-treatedwith1μmol/LofDXMor0.1μmol/LofVCR,theactivationofNF-κBinducedby1μmol/LofAra-Cwassignificantlysuppressedwithinhibitionratesof31.0%and47.0%,respectively.TheapoptosisratesofHL60-ncellsinducedby1.0μmol/L,10μmol/Land100μmot/LAra-Cwere45.00±3.16%,61.88±3.40%and77.62±4.75%,respectively.TheapoptoticratesofHL60-ncellsinducedbyDXMat1μmol/LorVCRat0.1μmol/Lweresimilartothatofthecontrolgroup.However,eitherDXMat1μmol/LorVCRat0.lμmol/LcouldenhancetheapoptosisofHL60-ncellsinducedbyAra-Cat1μmol/Lwithratesof39.1%and59.2%,respectively.Conclusion:Ara-CcaninduceapoptosisandactivationofNF-κBinHL60-ncells.ThemechanismofincreasedapoptosisofHL60-ncellsbyDXMorVCRmayberelatedtosuppressionofNF-κBactivation.