学科分类
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19 个结果
  • 简介:Chronicalcoholconsumptionisamajorriskfactorworldwideaffectingsignificantlybothmortalityandyearsoflifelost(YLL)(1).Ca.5%ofthewesternworldshowriskyalcoholconsumptionandinsomecountriessuchasChinaaregionalyearlyincreaseofalcoholconsumptionofover400%hasbeenobservedrecently(2,3).Theliveris

  • 标签: 酒精性 CYP2E1 肝癌 介导 堵塞 药理
  • 简介:Objective:ToinvestigatetheeffectsofE7080andN5-(1-iminoethyl)-L-ornithinedihydrochloride(L-NIO)oncolorectalcanceraloneandincombination.Methods:HT29colorectalcancercelllinefromSapInstitutewasused.Real-timecellanalysis(xCELLigencesystem)wasperformedtodeterminetheeffectsofE7080andL-NIOoncolorectalcellproliferation.WhileapoptosiswasdeterminedwithAnnexinVstaining,andtheeffectofagentsonangiogenesiswasdeterminedwithchorioallantoicmembrane(CAM)model.Results:WefoundthatE7080hasastrongantiproliferativeeffectwithanhalfmaximuminhibitionofconcentration(IC50)valueof5.60×10–8mol/L.AlsoithasbeenobservedthatE7080showedantiangiogenicandapoptoticeffectsonHT29colorectalcancercells.AntiangiogenicscoresofE7080were1.2,1.0and0.6for100,10and1nmol/LE7080concentrations,respectively.Furthermore,apoptosishasbeendetectedin71%ofHT29colorectalcancercellsafteradministrationof100nmol/LE7080whichmayindicatestrongapoptoticeffect.MeanwhileadministrationofL-NIOalonedidnotshowanyeffect,butthecombinationofE7080withL-NIOincreasedtheantiproliferative,antiangiogenicandapoptoticeffectsofE7080.Conclusions:ResultsofthisstudyindicatethatE7080maybeagoodchoiceintreatmentofcolorectaltumors.FurthermoretheincreasedeffectsofE7080whencombinedwithL-NIOraisethepossibilitytousealowerdoseofE7080andthereforeavoid/minimizethesideeffectsobservedwithE7080.

  • 标签: 酪氨酸激酶抑制剂 结直肠癌 NOS抑制剂 结肠 抗血管生成 细胞凋亡
  • 简介:p90核糖体S6蛋白激酶(rihosomalS6kinase,RSK)为Ras信号转导通路下游途径的重要调控因子,对Ras通路起调控作用。近年发现RSK家族与恶性肿瘤发生、发展密切相关。本文就RSK家族与恶性肿瘤的关系作简要综述。

  • 标签: 恶性肿瘤 p90核糖体S6蛋白激酶家族
  • 简介:Objective:Fusogenicendogenousretroviralsyncytinplaysanimportantroleintheformationofsyncytiotrophoblastsinhumanplacenta.Apartfromitsexpressioninplacenta,brainandtestis,syncytinhasalsobeenfoundinmanycancers.Althoughsyncytinhasbeenproposedtoserveasapositiveprognosticmarkerinsomecancers,theunderlyingmechanismisunclear.Theaimofthisstudyistoevaluatetheeffectsofsyncytinexpressionontheinvasivephenotypeofmelanomacells.Methods:Theeukaryoticexpressionplasmidforsyncytin-EGFPwasconstructedandtransfectedintoB16F10melanomacells.TheeffectofsyncytinontheinvasionpotentialoftumorcellswasevaluatedinB16F10sublinecellsthatstablyexpressedsyncytin-EGFPfusionproteinorEGFPalone.Results:TheB16F10sublinesthatstablyexpressedsyncytin-EGFPorEGFPalonewereestablishedrespectivelyandconfirmedbyimmunofluorescentandimmunoblottingassay.SyncytinexpressioninB16F10cellswasassociatedwithdecreasedcellproliferation,migrationandinvasion.Multinucleatedgiantcellsthatcontainedasmanyasfivenucleiwereinducedinsyncytin-expressingcells.Inaddition,syncytinexpressiondidnotalterthesensitivityofB16F10cellstotrichosanthin,atoxinthatdamagessyncytiotrophoblastsmoreefficientlythanothertissues.Conclusions:Theseresultssuggestthatsyncytinexpressioninsomecancersmayconfinetheirinvasionpotentialandthusserveasapositiveprognosticfactor.更多还原

  • 标签: 内源性逆转录病毒 黑色素瘤 细胞核 侵袭 抑制作用 表型
  • 简介:Objective:ToassesstheeffectofantiviraltherapyforhepatitisBvirus(HBV)-relatedhepatocellularcarcinoma(HCC)afterradicalhepatectomy.Methods:Atotalof478HBV-relatedHCCpatientstreatedbyradicalhepatectomywereretrospectivelycollected.Patientsinthetreatmentgroup(n=141)receivedpostoperativelamivudinetreatment(100mg/d),whereaspatientsinthecontrolgroup(n=337)didnot.Recurrence-freesurvival(RFS)rates,overallsurvival(OS)rates,treatmentsforrecurrentHCCandcauseofdeathwerecomparedbetweenthetwogroups.Propensityscorematching(PSM)analysiswasalsoconductedtoreduceconfoundingbiasbetweenthetwogroups.Results:The1-,3-,and5-yearRFSratesdidn’tsignificantlydifferbetweenthetwogroups(P=0.778);however,the1-,3-,and5-yearOSratesinthetreatmentgroupweresignificantlyhigherthanthoseinthecontrolgroup(P=0.002).Similarresultswereobservedinthematcheddata.SubgroupanalysisshowedthatantiviraltreatmentconferredasignificantsurvivalbenefitforBarcelonaClinicalLiverCancerstageA/Bpatients.FollowingHCCrecurrence,morepeopleinthetreatmentgroupwereabletochoosecurativetreatmentsthanthoseinthecontrolgroup(P=0.031).Forcauseofdeath,fewerpeopleinthetreatmentgroupdiedofliverfailurethanthoseinthecontrolgroup(P=0.041).Conclusion:PostoperativeantiviraltherapyincreaseschancesofreceivingcurativetreatmentsforrecurrentHCCandpreventsdeathbecauseofliverfailure,therebysignificantlyprolongingOS,especiallyinearly-orintermedian-stagetumors.

  • 标签: 抗病毒治疗 肝细胞癌 乙型肝炎病毒 切除术 肝功能衰竭 死亡原因
  • 简介:Objective:Todeterminetheclinicalserumlevelsofcarcinoembryonicantigen(CEA)andcarbohydrateantigen19-9(CA19-9),individuallyandincombination,forthediagnosisof50healthysubjectsand150casesofesophageal,gastric,andcoloncancers.Methods:Thesensitivitiesofthetwomarkerswerecomparedindividuallyandincombination,withspecificitysetat100%.Receiveroperatingcharacteristic(ROC)curveswereplotted.Results:SerumCEAlevelsweresignificantlyhigherincancerpatientsthaninthecontrolgroup.ThesensitivityofCEAwasdetermined:inesophagealcancer,sensitivity=28%,negativepredictivevalue(NPV)=61.72%,andAUC=0.742(SE=0.05),withasignificancelevelofP<0.0001;ingastriccancer,sensitivity=30%,NPV=58.82%,andAUC=0.734(SE=0.05),withasignificancelevelofP<0.0001;incoloncancer,sensitivity=74%,NPV=79.36%,andAUC=0.856(SE=0.04),withasignificancelevelofP<0.0001.ThesensitivityofCA19-9wasalsoevaluated:inesophagealcancer,sensitivity=18%,NPV=54.94%,andAUC=0.573(SE=0.05),withasignificancelevelofP=0.2054.Ingastriccancer,sensitivity=42%,NPV=63.29%,andAUC=0.679(SE=0.05),withasignificancelevelofP<0.0011.Incoloncancer,sensitivity=26%,NPV=57.47%,andAUC=0.580(SE=0.05),withasignificancelevelofP=0.1670.ThefollowingwerethesensitivitiesofCEA/CA19-9combined:inesophagealcancer,sensitivity=42%,NPV=63.29%,SE=0.078(95%CI:0.0159-0.322);gastriccancer,sensitivity=58%,NPV=70.42%,SE=0.072(95%CI:-0.0866-0.198);andcoloncancer,sensitivity=72%,NPV=78.12%,SE=0.070(95%CI:0.137-0.415).Conclusion:CEAexhibitedthehighestsensitivityforcoloncancer,andCA19-9exhibitedthehighestsensitivityforgastriccancer.Combinedanalysisindicatedanincreaseindiagnosticsensitivityinesophagealandgastriccancercomparedwiththatincoloncancer.

  • 标签: 结肠癌 食管癌 CEA 胃癌 曲线分析 灵敏度
  • 简介:近年来在对肿瘤免疫的研究中发现,乳腺癌、胰腺癌、前列腺癌等多种肿瘤组织中存在趋化因子受体CCR5的高表达。进一步研究发现,CCR5不仅表达于肿瘤组织中,在Treg细胞(调节性T细胞)、淋巴细胞等免疫细胞上也有表达,参与肿瘤免疫、免疫逃避等行为,影响肿瘤的预后及进展。CCR5在肿瘤免疫中的作用机制正成为国内外研究的热点。作者就国内外有关CCR5在肿瘤的发生、发展中的最新研究进展进行综述。

  • 标签: CCR5 肿瘤 TREG细胞 预后
  • 简介:背景与目的:MicroRNA(miRNA)参与肿瘤发生发展的诸多过程,并参与调节多种抗肿瘤药物的敏感性。本研究探讨恶性胶质瘤中miR-181b对VM-26(teniposide)化疗敏感性的影响。方法:以荧光定量PCR法检测miR-181b在高级别胶质瘤中的表达.并利用CCK-8细胞毒性实验检测高级别胶质瘤患者细胞对VM-26的化疗敏感性:并通过慢病毒感染构建稳定高表达miR-181b的U87/181b细胞及其对照组U87/nc.在荧光显微镜下观察其转染率及荧光定量PCR法检测其中miR-181b的表达:进而利用CCK-8细胞毒性实验检测U87/181b和U87/nc细胞对VM-26的敏感性.利用流式细胞仪检测VM-26作用72小时后U87/181b和U87/nc的凋亡情况。结果:在高级别胶质瘤中,miR-181b的表达与VM-26的敏感性呈正相关(r=-0.691。P〈0.01).也就是miR一18lb高表达肿瘤对VM-26的敏感性高。qPCR检测miR-181b在U87/18lb(0.699±0.023)的表达显著高于U87/nc(0.019±0.001)(P〈0.05)。CCK-8检测结果显示U87/181b[IC50:(1.25±0.12)μg/mL]对VM-26的敏感性显著高于U87/nc[IC50:(6.24±0.88)μg/mL]P〈0.05)。经VM-26处理后U87/181b凋亡率(69.41±0.77)明显高于U87/nc(37.93_+2.90)(P〈0.05)。结论:在高级别胶质瘤高表达miR-18lb的肿瘤对VM-26的敏感性高:在胶质瘤细胞U87中增加miR-18lb表达可以提高对VM-26的敏感性.

  • 标签: 胶质瘤 miR-181b VM-26 耐药性
  • 简介:胰腺癌是预后较差的恶性肿瘤,总体5年生存率仅有1~4%[1],即使行根治性切除手术,其术后5年生存率也仅有15~25%[2].在中国,2004年一项对多家医院共2340例胰腺癌患者的临床流行病学调查显示,胰腺癌根治切除率仅20.9%,根治术后胰腺癌的l、3、5年生存率分别为54.36%、13.47%、8.47%[3],在胰腺癌中,胰头癌的发病率近年来基本保持稳定,而胰体尾癌的发病率则显著上升,这可能与影像学技术的进步使部分无临床症状的患者获得诊断有关[4].在本文中,我们将汇报1例已侵犯腹腔干的胰体尾癌患者行根治切除术后5年,发现孤立的左锁骨上淋巴结转移的个案报道.

  • 标签: 体尾 孤立转移 尾癌
  • 简介:Objective:TheaimofthepresentstudywastoinvestigateantioxidantandtheanticancerigenactivityofamethanolextractfromArtemisiaprincepsvar.orientalis(APME),awell-knowntraditionalherbalmedicineinAsia,inhepatocellularcancercells.Methods:ToevaluatetheantioxidantactivityofAPME,reactiveoxygenspecies(ROS)andtheantioxidantenzymes,superoxidedismutase(SOD)andcatalasewereinvestigatedinHepG2cellsexposedtoAPME(5,100,and200μg/mL)for72h.Then,toevaluatetheanticanceractivityofAPME,weinvestigatedtheproliferationandapoptosisinductionofHepG2andHep3BcellsexposedtoAPME(1-200μg/mL)for24,48,and72h.Results:APMEdose-dependentlyreducedthegenerationofROSinthepresenceofH2O2comparedwithcontrolcells.Furthermore,itincreasedcatalaseandSODactivity.Moreover,APMEinhibitedcellproliferationinadose-andtime-dependentmanner,butatconcentrationslowerthan100μg/mL,theinhibitionwaslessdose-dependentthantime-dependent.HepG2andHep3Bcellsexposedto5,100,and200μg/mLAPMEfor72hunderwentcellcyclearrestandapoptosis.ExposuretoAPMEresultedinasignificantincreaseinthenumberofcellsinG1phaseandadecreaseintheG2/Mphasecellpopulation.Inaddition,APMEinducedP53expressionofHepG2cellsinadose-dependentmanner,andplayedaroleinthedownregulationofBcl-2andupregulationofBaxinbothHepG2andHep3Bcells.Conclusions:TheseresultsindicatethepotentialroleofAPMEasanantioxidantandanticancerigenagentinhepatocarcinomacelllines.

  • 标签: HepG2细胞 肝癌细胞 甲醇提取物 抗癌活性 抗氧化剂 超氧化物歧化酶
  • 简介:目的观察美罗华联合CHOP方案治疗弥漫性大B细胞淋巴瘤的疗效及不良反应。方法48例CD20阳性的弥漫性大B细胞淋巴瘤患者,随机分为观察组和对照组,每组24例。观察组采用美罗华联合CHOP方案化疗,对照组单用CHOP方案化疗。全部患者完成6个周期化疗后评价疗效。结果观察组和对照组的总有效率分别为91.7%(22/24)和66.7%(16/24),1年总生存率(OS)分别为95.8%和74.7%,3年OS分别为83.3%和50.O%,1年无进展生存率(PFS)分别为82.6%和57.3%,3年PFS分别为62.8%和37.2%,以上两组比较差异均有统计学意义(P〈0.05)。两组患者的不良反应主要为胃肠道反应、骨髓抑制和输液相关不良反应。除畏寒、发热外,其余不良反应的发生率差异均无统计学意义(P〉0.05)。结论美罗华联合CHOP方案治疗弥漫性大B细胞淋巴瘤疗效较好,未增加化疗毒性,安全性好,值得临床推广应用。

  • 标签: 淋巴肿瘤 美罗华 CHOP 疗效
  • 简介:目的探讨糖酵解抑制剂2-脱氧-D-葡萄糖(2-deoxy-D-glucose,2-DG)与5-氟尿嘧啶(5-Fu)单独及联合应用对人胃癌细胞MGC-803增殖及凋亡的影响.方法将2-DG(10mmol/L)、及5-Fu(5.0μg/L)单药及联合用药作用于人胃癌细胞MGC-803,MTT法检测各组细胞的生长抑制率,流式细胞仪检测各组细胞凋亡情况.结果联合用药组(2-DG+5-Fu)对MGC-803增殖抑制率为(70.93±3.84)%,显著高于2-DG组(30.61±1.72)%和5-Fu组(47.08±4.34)%,差异有统计学意义(P<0.05).联合用药组肿瘤细胞凋亡率为(38.96±2.62)%,2-DG、5-Fu单药组肿瘤细胞凋亡率分别为(15.70±1.42)%、(25.56±2.64)%,联合用药组分别与单药组比较,差异有统计学意义(P<0.05).结论2-DG能有效抑制人胃癌细胞MGC-803细胞生长增殖,并诱导其凋亡;2-DG与5-Fu联合应用抗肿瘤作用明显增强.

  • 标签: 2-脱氧-D-葡萄糖 胃癌 增殖 细胞凋亡
  • 简介:5-氟尿嘧啶(5-fluorouracil,5-FU)作为消化道肿瘤的主要化疗药物之一,通过抑制胸苷合成酶(thymidilatesynthase,TS)达到抗肿瘤效应。而二氢嘧啶脱氢酶(dihydropyrimidinedehydrogenase,DPD)是5-FU分解代谢的起始酶和限速酶,TS和DPD分别作为5-FU合成代谢和分解代谢的关键酶,在5-FU的治疗过程中起重要作用,二者在肿瘤组织中的表达及活性是影响5-FU化疗疗效的主要因素之一。本文综述TS酶和DPD酶的功能、特点及其与5-氟尿嘧啶疗效的关系,以利于临床制定合理的个体化化疗方案,实现消化道肿瘤的个体化治疗。

  • 标签: 胸甘酸合成酶 二氢嘧啶脱氢酶 消化道肿瘤 化疗
  • 简介:目的探讨5-氮杂-2’-脱氧胞苷(5-Aza—CdR,DAC)与顺铂(cisplatin,PDD)联合应用对人三阴性乳腺癌细胞株MDA—MB-231体外增殖及凋亡的影响。方法实验分组:5txMDAC处理组(DAC组),15txMPDD处理组(PDD组),2.5txMDAC与8txMPDD同步处理组(DAC+PDD组),2.5μMDAC与8μMPDD序贯处理组(DAC→PDD组)及空白对照组。分别以MTT法和流式细胞术(FCM)测定各处理组MDA—MB-231细胞的增殖、凋亡情况,以q值评价两药的联合效应。结果DAC组的24h、48h、72h增殖抑制率分别为(8.12±0.79)%、(21.72±1.60)%及(30.39±1.31)%;PDD组为(35.14±2.OO)%、(49.22±1.01)%及(65.52±1.53)%;DAC+PDD组为(54.25±3.82)%、(68.89±1.52)%及(87.26±2.37)%;DAC→PDD组为(6.84±0.68)%、(67.64±0.91)%及(88.764-3.54)%。联合组较单药组增殖抑制率均显著升高(P〈0.01)。DAC+PDD组、DAC→PDD组24h、48h、72h的q值分别为1.12、1.14、1.15和0、1.12、1.17,两药联合有增效作用。对照组、DAC组、PDD组、DAC+PDD组、DAc—PDD组24h、48h、72h凋亡率分别为(1.57±0.38)%、(1.83±0.27)%、(2.26±0.42)%:(10.41±0.70)%、(15.37±0.74)%、(21.39±1.22)%;(16.63±0.65)%、(21.89±1.20)%、(30.39±2.20)%;(21.42±1.11)%、(33.86±1.16)%、(42.92±1.16)%;(8.26±0.68)%、(28.98±1.01)%、(41.98±1.12)%。联合组较单药组及对照组凋亡率显著升高(P〈0.01)。结论DAC与PDD均能抑制MDA—MB-231细胞株的增殖,促进其凋亡,且两者联合有增效作用。

  • 标签: 三阴性乳腺癌 5-氮杂-2'-脱氧胞苷 顺铂 序贯治疗 同步治疗 增殖
  • 简介:目的观察5-氟尿嘧啶(5-fluorouracil,5-Fu)和乌司他丁联合应用对结肠癌的抑制作用.方法构建结肠癌HT-29裸鼠皮下移植瘤模型.腹腔药物注射,分为4组:对照组(A组)、单独乌司他丁组(B组)、单独5-Fu组(C组)、5-Fu和乌司他丁联用组(D组),观察二者单独及联合作用对结肠癌移植瘤生长的作用.结果给药21天时,A、B两组移植瘤体积无明显差异(P>0.05),C、D组移植瘤体积均小于A组(P<0.05),其中D组移植瘤体积低于C组(P<0.05).四组小鼠用药前体重无显著差异(P>0.05),用药后A、B两组移植瘤重及非肿瘤体重无明显差异(P>0.05),C、D两组移植瘤重均低于A组(P<0.05),非肿瘤体重均高于A组(P<0.05),且D组移植瘤重低于C组(P<0.05),非肿瘤体重高于C组(P<0.05).结论5-Fu和乌司他丁联合应用,对结肠癌移植瘤抑制作用增强,可改善化疗后的生存状态.

  • 标签: 5-FU 乌司他丁 结肠癌 移植瘤
  • 简介:目的研究乙肝病毒/黄曲霉毒素B1双暴露相关性肝细胞性肝癌(hepatocellularcarcinoma,HCC)染色体遗传学畸变的特点。方法将32例手术切除经病理证实为HCC的癌组织,按照乙肝病毒与黄曲霉毒素的暴露情况分为4个亚组:A组为HBV(+)/AFB,(+)10例;B组为HBV(+)/AFB1(-)10例;C组为HBV(-)/AFB1(+)6例;D组为HBV(-)/AFB1(-)6例。应用微阵列比较基因组杂交技术(ArrayCGH)检测分析其22对染色体DNA拷贝数的变化。结果32例HCC样本中,共发现573个染色体畸变区段(chromosomalaberrations,CNAs)。其中1q、4p、5p、6p、7p、8q、10p、17q、20p、20q和X主要表现为扩增区段;1p、2q、4q、8p、9p、10q、11q、13q、14q、16p、16q、17p、19p、19q、21q、22q和Y主要表现为缺失区段。同时,共检测出25个染色体发生高频畸变的区段(recurrentlyalteredregions,RARs),其中lq21.1-q44、5p13.2-p15.3、6p12.1-p25.2、7q11.2-q35、8q11.2-q24.3、17q12-q25.2、18q12.3-q22.3和x为高频率扩增区段,而lp31.1-p36.2、2q23.2-q37.2、4q12-q35.2、6q14.1-q26、8p12-p23.2、9p21.1-p24.2、10q21.3-q26.2、13q12.1-q21.1、14q21.3-q32.2、16p12.1-p13.2、16q12.1-q24.1、17p12-p1313、19p13.1-p13.3、19q13.2-q13.4、21q21.3-q22.2、22q11.2-q13.2和Y染色体为高频缺失区段。8p12-p23.2缺失的发生率在进展期HCC(TNM分期为Ⅲ~Ⅳ期)中明显高于早期HCC(TNM分期为I~Ⅱ期)(仁0.038)。4q12-q35.2、13q12.1-q21.1的缺失及7q21.1-q35的扩增发生率在A组中最高。Cox模型分析结果示:在单因素分析中AFP水平、肿瘤大小、TNM分期、BCLC分期、侵袭与转移的发生、8p12-p23.2的缺失以及19p13.1-p13.3的缺失等为影响患者无瘤生存时间的危险因素(P〈0.05).而在多因素分析中AFP水平、TNM分期以及8p12-p23.2的缺失等为影响患者无瘤生�

  • 标签: 肝肿瘤 乙肝病毒 黄曲霉毒素B1 染色体 Array CGH
  • 简介:神经胶质瘤是中枢神经系统(CNS)最常见的一类肿瘤,占了颅内原发肿瘤的35%-60%。2007年世界卫生组织(WH0)中枢神经系统肿瘤分类中将胶质瘤分为Ⅰ-Ⅳ级,其中Ⅲ、Ⅳ级为恶性胶质瘤,大约占所有胶质瘤的77.5%。目前对神经胶质瘤的临床治疗采取以手术治疗为主,结合放疗、化疗等疗法的综合治疗.虽然能延长患者生存时间,但存在高复发率、高致残率、高病死率等问题,总体预后仍然较差。自20世纪70年代以来.维生素C(VC)抗肿瘤作用的研究日益进展,国外的医疗工作者已将其作为肿瘤治疗的补充和替代疗法之一.并报道了静脉注射维生素C治疗神经胶质瘤、卵巢癌、肾细胞癌、乳腺癌、大肠癌、非霍奇金淋巴瘤、前列腺癌、膀胱癌等肿瘤的临床病例,认为其能改善患者的临床症状、提高生存质量、延长生存期。本文就维生素C对神经胶质瘤的治疗作用做一综述。

  • 标签: 维生素C 抗坏血酸 神经胶质瘤 过氧化氢
  • 简介:Objectiveandbackground:Althoughp21rashasbeenreportedtobeupregulatedinhepatocellularcarcinomacomplicatingchronichepatitisCtypeI,p21rashasadifferentroleinadvancedstages,asithasbeenfoundtobedownregulated.Thegoalofthisstudywastoinvestigatethestatusofp21rasinearly-stage/low-gradeandlate-stage/high-gradehepatocellularcarcinomaanditspossiblelinktoapoptosis.Materialandmethods:Thirty-fivecaseseachofchronicHCVhepatitistype4(groupI)andcirrhosiswithhepatocellularcarcinoma(HCC)complicatingchronicHCVhepatitis(groupsIIandIII)wereimmunohistochemicallyevaluatedusingap21raspolyclonalantibody.Theapoptoticindexwasdeterminedinhistologicsectionsusingtheterminaldeoxynucleotidyltransferase-mediatedd-UTPbiotinnickendlabeling(TUNEL)assay.Results:Significantdifferences(P=0.001)weredetectedinp21rasproteinexpressionbetweenthethreegroups.Anear2-foldincreaseinp21rasstainingwasobservedinthecirrhoticcasescomparedtothehepatitiscases,andp21rasexpressionwasdecreasedintheHCCgroup.p21rasexpressioncorrelatedwithstage(r=0.64,P=0.001)andgrade(r=-0.65,P=0.001)intheHCCgroupandgradeintheHCVgroup(r=0.44,P=0.008).Bothp21rasexpressionandTUNEL-LIweresignificantlylowerinlargeHCCscomparedtosmallHCCs(P=0.01each).TheTUNELvalueswerenegativelycorrelatedwithstageintheHCCgroup(r=-0.85,P=0.001).TheTUNELvalueswerealsonegativelycorrelatedwithgradeinboththeHCVandHCCgroups(r=0.89,P=0.001andr=-0.53,P=0.001,respectively).Thep21rasscoresweresignificantlycorrelatedwiththeTUNEL-LIvaluesintheHCCgroup(r=0.63,P=0.001)andHCVgroup(r=0.88,P=0.001).Conclusions:p21rasactsasaninitiatorinHCCcomplicatingtype4chronicHCVandisdownregulatedwithHCCprogression,whichmostlikelypromotestumorcellsurvivalbecauseitfacilitatesthedownregulationofapoptosiswithtumorprogression.

  • 标签: 丙型肝炎病毒 ras基因 细胞凋亡 P21 基因介导 肝癌