简介：Objective:Noninvasivediffusion-weightedmagneticresonanceimaging(DWI)isawell-studiedMRimagingtechniqueforquantifyingwaterdiffusionespeciallyintumorarea.Thecorrelationbetweenapparentdiffusioncoefficient(ADC)valueandapoptosisorproliferationisnotclearbynow.ThisstudyaimedtoinvestigatewhetherDWI-ADCvaluecouldbeusedasanimagingmarkerrelatedwithpathologicindexesoftumors.Methods:Atotalof30Balb/cmicewithHT29colorectalcarcinomaweresubjectedtoDWIandhistologicanalysis.ThepercentageofADCchangesandtheapoptoticandproliferatingindexeswerecalculatedatpredefinedtimepoints.Kolmogorov-SmirnovdistanceswereconsideredtodeterminewhetherthepercentageofADCchanges,andtheapoptoticandproliferatingindexeswerenormallydistributed.Anindependent-samplest-testwasusedtoanalyzethedifferencebetweenapoptoticandproliferatingindexesinthetwogroups.Results:Therewasastatisticallysignificantdifferenceinproliferatingindexbetweentheradiotherapyandcontrolgroups(meanproliferatingindex:49.27%vs.83.09%),andtherewasastatisticallysignificantdifferenceinapoptoticindexbetweenthetwogroups(meanapoptoticindex:37.7%vs.2.71%).AsignificantpositivecorrelationwasfoundbetweenthepercentageofADCchangesoftheviabletissueandapoptoticindex.Pearson'scorrelationcoefficientwas0.655(P=0.015).AsignificantnegativecorrelationwasfoundbetweenthepercentageofADCchangesoftheviabletissueandki-67proliferationindex.Pearson'scorrelationcoefficientwas0.734(P<0.001).Conclusions:OurresultssuggestthatADCvaluemaybeusedinmeasurementofcellapoptoticandproliferatingindexesincolorectalcarcinoma.

简介：目的探讨C-erbB-2蛋白在贲门癌中的表达及其与预后的关系。方法应用免疫组化二步法检测200例贲门癌组织中C-erbB-2蛋白的表达情况，结合病理资料及临床资料进行分析。结果贲门癌组织中C-erbB-2蛋白的阳性表达率为31.5%。C-erbB-2蛋白的过表达与肿瘤浸润深度、分化程度、淋巴结转移及临床分期密切相关。结论C-erbB-2蛋白的表达水平与肿瘤组织的分化程度和术后临床分期密切相关，是贲门癌预后的一项判断指标。

简介：目的：探讨癌基因C-Src抑制剂对三阴性乳腺癌的辅助治疗作用。方法体外培养三阴性乳腺癌细胞MDA-MB-231，并与雌激素受体（ER）、孕激素受体（PR）阳性的乳腺癌细胞T47D以及HER2阳性的SK-Br-3细胞做比较。用癌基因c-Src抑制剂来治疗三株细胞。采用MTT和免疫电泳的方法检测细胞的生长以及细胞信号传导通路的改变。结果c-Src抑制剂可以部分抑制T47D细胞生长，对三阴性乳腺癌细胞MDA-MB-231有很明显的抑制作用。但是，对SK-Br-3细胞的生长没有阻滞作用。进一步研究发现，是否抑制细胞生长信号传导通路决定c-Src抑制剂的治疗效果。HER2抑制剂可以明显抑制SK-Br-3细胞周期与生长，而对MDA-MB-231没有效果。结论抑制癌基因c-Src酪氨酸激酶活性对三阴性乳腺癌细胞有很好的治疗效果。