简介：ＥＸＰＲＥＳＳＩＯＮＯＦｃｅｒｂＢ２ＡＮＤＰＣＮＡＩＮＣＥＲＶＩＣＡＬＡＤＥＮＯＣＡＲＣＩＮＯＭＡＡＮＤＩＴＳＳＩＧＮＩＦＩＣＡＴＩＯＮＨｕａｎｇＹｏｎｇ黄勇ＣａｉＳｈｕｍｏ蔡树模ＹｕＳｈａｏｙｉｎ俞绍音ＳｈｉＤａｒｅｎ施达仁ＣａｎｃｅｒＨｏｓｐ...

简介：Inthispaperourstudiesaboutthesequentialtestingprogramforpredictingandidentificatingcarcinogens,sequentialdiscriminantmethodandcost-effectivenessanalysisaresummarized.Theanalysisofourdatabaseofcarcinogenicltyandgenotoxicityofchemicalsdemonstratestheuncertainty.ofshort-termtests(STTs)topredictcarcinogensandtheresultsofmostroutineSTTsarestatisticallydependent.WerecommendthesequentialtestingprogramcombiningSTTsandcarclnogenicityassay,theoptimalSTTbatteries,therulesofthesequentialdiscriminationandthepreferalchoicesofSTTstorspecificchemicalclass.Forillustrativepmposesthecarclnogenicitypredictionofseveralsamplechamicalsispresented.Theresultsofcost-effectivenessanalysissuggestthatthisprogramhasvastsocial-economiceffectiveness.

简介：Objective:ToconfirmwhetherBungarusmulticinctuscrudevenominducestheapoptosisofK562tumorcellsandtofindoutthecomponentsinducingapoptosisofK562cellsfromthecrudevenom.Methods:thecrudevenomseparatedandpurifiedbycationexchangechromatography,andtheeffectofvenomsonK562wasstudiedbyMTTmethodandflowcytometry.Results:ThecrudevenombegantokillK562cellsatthan8(103ng/ml(thesurvivalratewas82.5%)concentrationandtheeffectwasmoresignificantin24hwhenadministrating8(105ng/ml(thesurvivalratewas29.4%)crudevenom.ApoptoticbodieswereobservedintheK562tumorcellsbyfluorescentmicroscopyafteradministrationof5(g/mlcycloheximide(CHX)orthepeakVIsolutionatabout8(105ng/ml.Thesameresultsweredetectedbytheflowcytometry.Asub-G1peakappearedafteradministrationofCHXorthesixthpeaksolution.Conclusion:TheauthorsfoundthatthevenomcankillK562tumorcellsintime-anddose-dependentmanner.However,thekillingeffectofthevenomisnotapoptosis.What'smore,thepeakVIsolution,acomponentofthecrudevenomcaninducetheapoptosisofK562tumorcells.

简介：徐卓立，郭军华，宋三泰，卢淑娟，吴德政ＤＥＴＯＸＩＦＹＩＮＧＥＦＦＥＣＴＯＦＬＩＳＨＥＮＧ－ＳＥＯＮＣＤＤＰＡＮＤＩＴＳＲＥＬＡＴＩＯＮＴＯＭＥＴＡＬＬＯＴＨＩＯＮＥＩＮＩＮＤＵＣＴＩＯＮ￥ＸｕＺｈｕｏｌｉ；ＧｕｏＪｕｎｈｕａ；ＳｏｎｇＳａｎｔａｉ；...

简介：ＡＮＴＩＣＯＭＰＬＥＭＥＮＴＡＲＹＡＣＴＩＶＩＴＹＩＮＨＵＭＡＮＳＥＲＵＭＯＦＬＵＮＧＣＡＮＣＥＲＰＡＴＩＥＮＴＳＡＮＤＩＴＳＰＯＳＳＩＢＬＥＣＬＩＮＩＣＡＬＳＩＧＮＩＦＩＣＡＮＣＥＬｉｕＨｕｉｒｏｎｇ刘慧荣ＬｉａｎｇＦｅｎｇ梁峰ＺｈａｎｇＷｅｉｆ...

简介：Inthepresentstudy,thechemosensitivityofMGc80-3humangastricadenocarcinomacellswasdeterminedbymeansofcolony-formingassayandtheinvitroactivitiesof10anticancerdrugswereexaminedonthebasisoftheclinicallyachievablepeakplasmadrugconcentration.TheresultsshowedthatMGc80-3cellsweremostsensitivetomitomyc’nC,adriamycinand5-fluorouracil,beingconsistentwiththeresponsenotedinclinicalgastriccancer.Thiscelllinemayretainitsoriginaldrugsensitivityandmaybeusefulinscreeningfornewcompoundswithactivityagainstthisdisease.

简介：Objective:Tounderstandwhetherverapamil(VER)resistancedevelopmentinthemultidrug-resistantcelllineanditsmechanism.Methods:K562/ADM/VERcellsublineresistanttoverapamilwasestablishedthroughagradualincreaseofVERconcentrationinthemedia.MTTmethodwasusedtoassayresistancetoVER,crossresistancetodipyriamole(DPM),cyclosporinA(CsA)inthecells,andHPLCandspectrofluorometertodetectintracellularaccumulationofVERorADMrespectively,aswellasS-Pimmunocytochemicaltechniquefordetectionofgenesexpression.Results:Itwereobservedthat7.9-foldincreaseinVERresistance,significantlyreducedintracellularaccumulationofVERorADMandalsodevelopacrossresistancetoDPMandCsAinK562/ADM/VERcells,comparedwithitsparentcell,K562/ADM.High-levelofp-glycoprotein(pgp),middle-levelofp53,p16,waspresentintwocelllineswithoutexpressionofGSTPI,C-myc,C-myc,C-fosandC-erbB-2.Bc1-2proteinexpressionwasfoundonlyinK562/ADMcells.Conclusion:K562/ADMcellswerecapableofbeinginducedtodevelopresistancetoVER.

简介：Objective:Toinvestigatephospho-(-cateninexpressioninnon-smallcelllungcancer(NSCLC)andtostudytherelationshipbetweenphospho-(-cateninexpressionandsomeclinicalpathologicalfactors.Methods:Theexpressionofphospho-(-cateninin67primaryNSCLCcasesdetectedimmunohistochemically.Results:phospho-(-cateninwasnotexpressedinnormalbronchialmucouscellandshowedcytoplasmicandnuclearexpressioninNSCLCcell.Totalpositiveexpressionratereached62.7%,andpositiveexpressionrateofnucleuswas38.8%.Thepositiveexpressionrate(87.5%)andnuclearexpressionrateofadenocarcinoma(62.5%)wereapparentlyhigherthanthoseofsquamouscellcancer(40.0%and17.1%)(P<0.01).Expressionofphospho-(-cateninhadnorelationshiptodifferentiationdegreeandlymphaticmetastasis.Thepostoperativesurvivaltimeisnotrelatedtophospho-(-cateninexpression.(Log-ranktest,P=0.9198;P=0.6274).COXmodelanalysisshowedthattumorstageanddifferentiationareindependentriskfactorstoprognosis(P=0.001;P=0.020).Conclusion:NSCLCcellsshowpositiveexpressionofphospho-(-catenin,phospho-(-cateninnuclearexpressionisrelevanttohistologicaltypes.Thereisnodifferenceinpostoperativesurvivaltimebetweenpatientswithphospho-(-cateninpositiveexpressionandpatientswithnegativeexpression,expressionofphospho-(-cateninisnotindependentriskfactortoprognosis.

简介：雷文东，张汝刚，阎水忠，王秀琴，牟巨伟，张大为，吴Ｎｍ２３ＧＥＮＥＥＸＰＲＥＳＳＩＯＮＡＮＤＩＴＳＣＯＲＲＥＬＡＴＩＯＮＷＩＴＨＬＹＭＰＨＮＯＤＥＭＥＴＡＳＴＡＳＩＳＩＮＨＵＭＡＮＬＵＮＧＣＡＮＣＥＲ￥ＬｅｉＷｅｎｄｏｎｇ；ＺｈａｎｇＲｏｕｇｉｎｇ；...

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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：Objective:ToconstructamutantpEGFP-hTERTexpressionvector,toobserveitssteadyexpressionintransfectedhumanbladdercarcinomacelllineT24anditsroleinmolecularregulatorymechanismsoftelomerase,andtoprovideanewtargetgeneforbladdercancer.Methods:PCRamplificationwasperformedbyusingprimersbasedontheknowngenesequenceofhTERT.PCRproductionwasclonedintoplasmidpGEMT-TeasyandthesequenceofmutanthTERTgenewasanalyzed.ArecombinantmutanthTERTvector(pEGFP-hTERT)wasconstructedattheEcoRIandSalIsitesofthepEGFP-C1vector.AftertransfectingthefusiongeneintobladdercarcinomacelllineT24bycalciumphosphate-DNAcoprecipitation,thesteadyexpressionofGFP-hTERTfusionproteinwastestedbyfluorescentlightmicroscopy.TheproliferationchangesofbladdercarcinomacelllineT24weredetectedbylightmicroscopyandsenescencecorrelatedβ-galactosidasestaining.Results:IdentificationofpEGFP-hTERTbyenzymedigestionshowedthatmutanthTERTfragmenthadbeenclonedintoEcoRIandSalIsitesofthepEGFP-C1vector.ThesteadyexpressionofGFP-hTERTfusionproteinwaslocalizedinthenucleusoftransfectedcells.Expressionofsenescence-associatedβ-galactosidaseintransfectedcellsgraduallyincreasedwithextendedculturedtimeandcellgrowthwassuppressed.Conclusion:Themutant-typehTERTgenesuppressestheproliferationofbladdercarcinomacelllineT24bycompetitiveeffectontelomeraseactivity.ThissuggeststhathTERTgenemightbeasuitablegenetargetforbladdercancertherapy.

简介：ＤＥＴＥＣＴＩＯＮＯＦＯＣＣＵＬＴＴＵＭＯＲＣＥＬＬＳＩＮＲＥＳＥＣＴＥＤＬＹＭＰＨＮＯＤＥＳＯＦＰＡＴＩＥＮＴＳＷＩＴＨＳＴＡＧＥＩＣＡＲＣＩＮＯＭＡＡＮＤＩＴＳＣＬＩＮＩＣＯＰＡＴＨＯＬＯＧＩＣＡＬＳＩＧＮＩＦＩＣＡＮＣＥＣｈｅｎＺｈａｏｌｕｎ...

简介：Havingbeenpassedfor160generations,acelllinedesignatedasH22-F25/LwasestablishedfromamurinetumorlymphaticmetastatlcmodelH22-F25whichhadbeensetupinourcollege.Thecelllinewasinsuspensionculturewitharapidproliferationandstablegrowth.Thepeaktuneofcelldivisionandproliferationwas48and96hoursafterculture.Inaweek,thecellnumberwasIncreasedby25tunes.H22-F25/Lstillkeepsthefeaturesofapoorlydifferentiatedcancer.Itstumorinducingrate(invivo)was100%in615mice.Lymphnodemetastasisratewas50%andpulmonarymetastasisrate10%.H22-F25/LIsapopulationofheterogenetlctumorcellsIncluding2stemcelllines(themodelnumberofchromosomesbeing43in40%tumorcellsand86in32%)andsomesidelines.ThecommonmarkerchromosomesM1,M2,M3andM4werepresentinallstemandsidelines.

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简介：Objective:ToinvestigatetheexpressionofE2FandBcl-2andtheclinicopathologicalsignificanceinhepatocellularcarcinoma.Methods:TheexpressionsofE2F-3andBcl-2in74patientswithhepaticcarcinoma,paracarcinomaand15patientswithlivercirrhosisweredetectedbyS-Pimmunohistochemicalstaining.Results:TheexpressionofE2Finhepaticcarcinomawassignificantlyhigherthanthatinparacarcinomaorlivercirrhosis(P<0.005),theexpressionofBcl-2inhepaticcarcinomawassignificantlyhigherthanthatinparacarcinoma(P<0.005),inwhichBcl-2expressionwaslowerthaninlivercirrhosis(P<0.05).TheexpressionofE2F-3wasrelatedwithhistologicalgrade,tumorsize,andtheexpressionofBcl-2wasrelatedwithhistologicalgrade,tumorsizeandtumornumber.TherewascorrelationbetweentheexpressionofE2F-3andBcl-2inhepaticcarcinoma.Conclusion:E2F-3andBcl-2expressionmayplayanimportantroleindevelopment,progressionandcellapoptosisoftumor.

简介：本文报道观察了胆管癌患者与肝胆管结石患者手术前及术后第七天血浆血栓素A2和前列环素的变化，结果表明胆管癌患者血浆血栓素A2和前列环素均明显升高，血栓素A2/前列环素比值明显增大，与肝胆管结石组比较有显著差别；术后则明显下降，术前术后比较也有显著差别，同时发现血栓素A2及血栓素A2/前列环素比值与血胆红素量明显正相关，提示血栓素A2与胆管癌患者的病情程度及预后有明显关系，说明血栓素A2/前列环素失衡与胆管癌的转归有密切关系。

简介：目的探讨基质金属蛋白酶-2（matrixmetalloproteinase-2，MMP-2）和环氧合酶-2（cyclooxygenase．2，COX．2）蛋白在非小细胞肺癌组织中的表达与意义。方法应用免疫组化SP方法检测80例非小细胞肺癌组织中MMP-2，COX-2的表达。结果MMP2及COX-2的阳性率分别为31．25％、41．25％。MMP-2及COX-2蛋白表达与临床病理因素无相关性。MMP2和COX-2的阳性表达之间无相关性。结论MMP2及COX-2参与非小细胞肺癌的发生，然而它们也许并不能作为重要的预后指标。

简介：目的了解环氧化酶-2(COX-2)和基质金属蛋白酶-2(MMP-2)在甲状腺乳头状癌中的表达情况及相互关系。方法甲状腺乳头状癌和癌旁组织COX-2和MMP-2的表达采用SP免疫组化分析。结果甲状腺乳头状癌组织COX-2和MMP-2的阳性表达率为81．7％(49／60)和73.3％(44/60)，20例癌旁正常滤泡上皮COX-2和MMP-2阳性表达率为5．0％(1／20)和25．0％(5／20)，两者阳性表达率均以甲状腺乳头状癌中为高(P<0．01)。COX-2和MMP-2在有淋巴结转移组阳性表达明显高于无淋巴结转移组(P<0．05，P<0．01)。COX-2阳性表达强度与MMP-2的阳性表达强度之间呈显著的正相关(P<0．01)。结论COX-2和MMP-2在甲状腺乳头状癌组织中的表达密切相关，两者的高表达在甲状腺乳头状癌的发生和发展中具有重要作用。提示COX-2和MMP-2可作为临床诊断的指标和化学治疗的靶点。

简介：目的本文报告2例鼻腔小细胞神经内分泌癌，结合文献探讨鼻腔神经内分泌癌的诊断和治疗。方法对2例鼻腔神经内分泌癌作了临床分析总结，女性1例，男性1例，病变均位于右侧，病程为3mo，1例病人病变范围广泛。单纯放射治疗1例，1例行综合治疗。结果经免疫组化和电镜检查证实为小细胞神经内分泌癌，2例病人均随访中，1例病人已存活3a，1例存活已1a。结论鼻腔小细胞神经内分泌癌不易和小细胞肿瘤鉴别，确诊需行免疫组化或电镜检查，为高度恶性肿瘤，发现时多数病变范围广范，对放疗和化疗敏感，治疗中应采用综合治疗方案。