简介：Objective:Toanalyzetheclinicopathologiccharacteristicsandprognosticfactorsofsmallgastrointestinalstromaltumor(GIST)ofthestomach.Methods:Atotalof31smallgastricGISTpatients,including10malesand21females,withamedianageof58years(37-81years),whounderwentsurgeryatanytimefrom1999to2012wereincludedinthisstudy.Theclinicalrecordsofthepatientswereanalyzedretrospectively.Results:Abdominaldiscomfortandpain(10cases,32.3%,respectively)werethetwomostcommoncomplaintsamongthepatients.Allpatientsreceivedsurgery,11receivedgastricwedgeresection,11receivedsubtotalgastrectomy,5receivedlaparoscopicgastricwedgeresection,and4receivedendoscopicsubmucosaldissection.Nosevereadversecomplicationwasobserved.Atotalof29patients(93.5%)werefollowedup.Duringthefollow-up,2patientswerefoundtoexhibittumorrecurrence,and1patienthadlivermetastases.Onepatientdiedoftumorprogression,whileanotherdiedofanothermalignanttumor.Medianprogressionfreesurvival(PFS)timewas120.3months,andmedianoverallsurvival(OS)timewas130.4months.Conclusion:SmallgastricGISThasbetterprognosis.Surgeryisthebestchoicefortherapy.Micro-invasiveproceduresaresafeandeffectiveforelectivepatients.Tumornecrosis,tumorbleeding,andmuscleinvasionarepotentialprognosticfactorsofsmallgastricGIST.

简介：Objective:Toinvestigatetherecurrencesites,riskfactors,andprognosisofpatientswithpersistentorrecurrentsquamouscellcarcinoma(SCC)ofthecervixwithinoneyearafterundergoingconcurrentchemoradiotherapy(CCRT).Methods:Clinicaldataof30patientswithpersistentorrecurrentSCCofthecervixwithinoneyearafterCCRTbetweenJuly2006andJuly2011wereanalyzedretrospectively.Thesedatawerecomparedwiththoseof35SCCcaseswithnosignsofrecurrenceaftercompleteremission.These35patientsweretreatedduringthesameperiod(between2006and2011)andselectedrandomly.Results:Amongthese30patients,25exhibiteddistantmetastasesofwhich14wereobservedwithin6monthsafterCCRT.Univariateanalysisshowedhigherincidenceofpelvicorpara-aorticlymphadenectasisandSCC-ag>10ng/mLinthegroupwithpersistentorrecurrentdiseasebeforetreatment(P<0.01).Multivariateanalysisbylogisticregressionrevealedthatthepre-therapeuticpelvicorpara-aorticlymphnodeenlargementandSCC-ag>10ng/mLweretheindependentriskfactors.Palliativechemotherapywasthemaintreatmentoptionforpatientswithpersistentorrecurrentdisease.The2-yearsurvivalratewas21.7%,andthemediansurvivaltimewas17months.Conclusion:PatientswithpersistentorrecurrentSCCofthecervixafterCCRTexhibitedahighrateofdistantmetastasiswithpoorprognosis.Thepre-therapeuticpelvicorpara-aorticlymphnodeenlargementandSCC-ag>10ng/mLwereidentifiedastheindependentriskfactorsforpersistentorrecurrentSCCwithin1yearafterCCRT.

简介：目的探讨X—rayrepaircross—complementinggroup1（XRCC1）RB99Q基因多态性与结直肠癌易感性的关系。方法通过计算机检索和手工检索，收集有关XRCC1R399Q基因多态性与结直肠癌易感性关系的文献，筛选出符合条件的文献，应用Meta分析软件对各项研究进行异质性检验，计算合并OR值及其95％可信区间，并行敏感性分析和发表偏倚的评估。结果国内外共有21篇文献纳入研究（结直肠癌组6229例；对照组10692例）。Meta分析结果显示：XRCC1R399Q基因多态性在整个人群中与结直肠癌无明显的关联性（ORQQvs、RR=1．10，95％CI=0．90～1．35；ORQQ/RQvs.RR=1．02，95％CI=0．90～1．16；ORQQvs.RR/RQ=1．12，95％CI=0．95～1．33）。通过种族的分层分析发现XRCC1R399Q基因多态性与结直肠癌易感性在亚洲人群和欧洲人群中无差异。结论XRCC1R399Q基因多态性与结直肠癌间不存在明显的易感性。

简介：目的构建稳定过表达X连锁凋亡抑制蛋白相关因子1（X-linkedinhibitorofapoptosisassociatedfactor1,XAF1）基因的鼻咽癌放射抗拒CNE-2R细胞株。方法分别将携带XAF1基因感染复数（multiplicityofinfection,MOI）为50的慢病毒稀释液。MOI为100的慢病毒原液和MOI为100的慢病毒原液加入终浓度为5μg/mL的聚凝胺（polybrene）转染人鼻咽癌放射抗拒CNE-2R细胞株。通过倒置荧光显微镜观察细胞内荧光数量及强度评判转染效率,通过实时荧光定量逆转录聚合酶链反应（real-timequantitativereversetranscriptionpolymerasechainreaction,qRT-PCR）和蛋白免疫印记法（westernblot）检测XAF1基因mRNA和蛋白的表达。结果慢病毒稀释液转染,约60%的细胞可观察到微弱荧光;慢病毒原液转染,约70%的细胞观察到较弱荧光;慢病毒原液加入5μg/mLpolybrene的转染效率较高,约90%的细胞观察到较强荧光。嘌呤霉素筛选上述转染效率最高的慢病毒原液加5μg/mLpolybrene组细胞,其成功将携带XAF1基因的慢病毒转入鼻咽癌放射抗拒CNE-2R细胞株。qRT-PCR和westernblot进一步证实细胞株稳定过表达XAF1基因。结论慢病毒加polybrene转染可成功构建稳定过表达XAF1基因的鼻咽癌放射抗拒CNE-2R细胞株。

简介：目的探讨靶向P2X7受体（P2X7R）的小发夹RNA（shRNA）对人鼻咽癌HONE1细胞增殖、凋亡及信号通路的影响。方法根据预实验结果优化shRNA转染条件,将2条靶向抑制P2X7R基因的shRNA载体片段（shRNA-1、shRNA-2）分别高效转染HONE1细胞,同时设转染无义序列（Blank）的空转染组及不进行任何处理的对照组。分别于转染24、48、72、96h后采用实时荧光定量PCR（QPCR）检测P2X7R表达水平以筛选抑制率高的转染载体用于后续试验。四甲基偶氮唑盐（MTT）法检测各组转染24、48、72、96h后的增殖抑制率,流式细胞术检测各组转染48、96h后的细胞凋亡率,QPCR法检测各组凋亡相关基因的mRNA水平,Westernblotting检测各组转染96h后磷脂酰肌醇3-激酶/蛋白激酶B（PI3K/Akt）通路和Wnt/β-连接素（β-catenin）通路中的蛋白变化。结果转染组的P2X7RmRNA水平均低于空转染组和对照组（P〈0.05）,且选择干扰效率高的shRNA-1载体进行功能学研究;与空转染组和对照组比较,shRNA-1转染组的HONE1细胞增殖抑制率、凋亡率及促凋亡基因Bid、Bax的mRNA水平均升高,而抗凋亡基因Bcl-2、Mcl-1的mRNA水平均降低,差异有统计学意义（P〈0.05）;与对照组比较,shRNA-1转染组处理后PI3K/Akt通路中PTEN蛋白水平均升高,而p-Akt水平均降低（P〈0.05）,Wnt/β-catenin通路中p-β-catenin、CyclinD1和C-myc水平均降低（P〈0.05）。结论通过shRNA抑制P2X7R基因表达可抑制鼻咽癌细胞增殖并诱导凋亡,可能与抑制PI3K/Akt、Wnt/β-catenin通路有关,对鼻咽癌的防治有一定价值。