简介:背景与目的:研究水通道蛋白-l(AQP-1)与血管内皮生长因子(VEGF)在血管母细胞瘤中的表达,并探讨其在血管母细胞瘤生成中的作用。方法:应用免疫组化方法,并通过测量积分光密度值(IOD)研究AQP-1与VEGF在30例囊性血管母细胞瘤、10例实体性血管母细胞瘤以及10例正常小脑组织中表达情况。结果:AQP-1与VEGF在30例囊性以及10例实体性血管母细胞瘤中表达显著增强(P〈0.05),且AQP-1在囊性肿瘤中的表达高于实体性肿瘤。结论:AQP-1的高表达可能在维持肿瘤细胞的高代谢需求中起促进和维持肿瘤增殖的重要作用:VEGF则在肿瘤血管生成中起重要作用,而且与AQP-1协同作用,共同促进肿瘤的增殖和血管的生成。
简介:TheinvivoeffectsofPhytolaccaacinosapoly-saccharidesI(PEP-I)onimmunologiccytotoxicityofmouseperitonealmacrophagesanditsproductionoftumornecrosisfactor(TNF)andinterleukin1(IL-1)werestudied.PEP-I80or160mgkgwasgiveniptwiceevery4day.BothdoseswerefoundtohavesignificantenhancingactivityonmacrophagescytotoxicityagainstS180sarcomacellsandmalignanttransformedfibroblastL929cells.PeritonealactivatedmacrophageswereincubatedwithLPSfor2and24hrstoinduceTNFandIL-1,respectively.TheTNFandIL-1activitiesweretestedfromcytotoxicityagainstL929cellsinanabsorbenceassayofenzymaticreactionandproliferationofthymocytesco-stimulatedassayseparately.TheoptimaltimeforTNFproductionwasfoundonday8.SignificantincreasesinTNFandIL-1wereobserved.IncomparisonoftheeffectofPEP-IonTNFwiththatofknownprimingagentBCG,therewasnodifferencebetweenthem,butPEP-IhadahigheffectonIL-1.Theseresultssug
简介:目的探讨MCL1蛋白在乳腺癌发生、发展中的作用.方法采用免疫组化方法检测78例乳腺癌及40例癌旁正常乳腺组织中MCL1蛋白的表达,并结合临床资料进行分析.结果MCL1蛋白表达定位于乳腺癌细胞的胞浆及胞核,阳性率为49.11%,在癌旁正常乳腺组织中几乎不表达.MCL1蛋白在乳腺癌中的表达显著高于癌旁正常乳腺组织(P〈0.01).此外,MCL1蛋白阳性表达率在临床病理Ⅲ期组织中明显高于Ⅰ期和Ⅱ期(P=0.001),伴淋巴结转移者的表达显著高于无淋巴结转移者(P=0.018),其表达与年龄和肿瘤大小无关.结论MCL1蛋白表达与乳腺癌发生、分化程度和淋巴结转移相关.MCL1基因可作为乳腺癌治疗的有效靶点.
简介:Objective:ToinvestigatewhethertheBc1-2antisenseoligonucleotide(ASODN)mayenhanceradiation-inducedapoptosisinRajicellline.Methods:Cellsurvivingfractionwasdeterminedusingthetrypanbluedyeexclusionassay.Theexpressionlevelofbc1-2proteinwasassayedbyimmunofluorescenceusingfluoresceisothiocyanatelabel.ApoptosiswasdetectedbyGiemsastainingandflowcytomertriccellcycleanalysis.Results:ItwasfoundthatBc1-2ASODNcombinedwithradiationhadsignificantlyreducedthenumberofviablecells(P<0.05).TherewasnodifferenceoncellsurvivalbetweenmismatchBc1-2oligodeoxynucleotide/radiationcombinationandradiation-treatedcellsalone.Bc1-2ASODNcombinedwithradiationcouldsignificantlyinhibitexpressionofBc1-2proteininRajicells(P<0.05).CellstreatedwithBc1-2ASODNcombinedwithradiationat72hdisplayedclassicapoptoticchanges.ApoptosisratesofRajicellstreatedwithBc1-2oligodeoxynucleotide/radiationcombinationandradiation-treatedcellsalone,respectively.Conclusion:Bc1-2antisenseoligonucleotidecanenhanceradiation-inducedapoptosisinRajicellline.
简介:目的研究TGFβ1在胃癌组织中表达,探讨其在胃癌血管形成中的重要作用.方法用SP免疫组化法,检测45例胃癌手术切除标本中胃癌TGFβ1蛋白的表达,用抗CD34单克隆抗体显示血管内皮细胞.结果TGFβ1阳性表达产物主要见于细胞的胞质内.胃癌组织中TGFβ1阳性表达率(60.0%)和强阳性表达率(22.22%)显著高于癌周组织(26.67%)(8.89%)(P<0.05).胃癌组织和癌周组织中血管内皮细胞质呈棕黄色染色.胃癌组织微血管密度(MVD)值(58.13±19.99)显著高于癌周组织(24.02±10.28)(P<0.05).TGFβ1表达阳性MVD值(60.94±16.91)显著高于表达阴性MVD值(40.26±18.83)(P<0.05).结论TGFβ1在胃癌组织中高水平表达,它可能参与胃癌的血管形成.
简介:Chronicalcoholconsumptionisamajorriskfactorworldwideaffectingsignificantlybothmortalityandyearsoflifelost(YLL)(1).Ca.5%ofthewesternworldshowriskyalcoholconsumptionandinsomecountriessuchasChinaaregionalyearlyincreaseofalcoholconsumptionofover400%hasbeenobservedrecently(2,3).Theliveris