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时间:2018-09-04
《色素原位杂交在检测乳腺癌患者组织中HER2基因的应用.doc》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、色素原位杂交在检测乳腺癌患者组织中HER2基因的应用【摘要】[目的]探讨色素原位杂交(CISH)在检测乳腺癌患者组织中HER2基因状态的临床应用,比较CISH与免疫组化(IHC)检测组织HER2状态的差异性。[方法]采用SPOT-LightHER2CISHTM试剂盒,以CISH方法对40例IHCEnVision法染色分别为(+++)、(++)、(+)和阴性(-)的乳腺癌石蜡切片标本进行HER2基因状态的检测。[结果]HER2表达IHC(+++)的8例标本中,7例为HER2基因扩增CISH检测,1例无扩增;(++
2、)的13例标本中,5例为HER2基因扩增,8例无扩增;(+)的10例标本中,2例为HER2基因扩增,7例无扩增;(-)的9例标本均无扩增。两种方法对乳腺癌组织HER-2/neu状态的检测有一定的差异性(kappa=0.458,P=0.003)。[结论]IHC是HER表达初步筛查的首选方法,由于蛋白表达和基因扩增检测结果存在一定的差异性,建议IHCC(+++~+)患者进一步作CISH检测确诊。【关键词】乳腺肿瘤免疫组织组化色素原位杂交基因;HER2(c-erbB-2)ChromogenicinSituHybrid
3、izationforHER-2/neuStatusDetectinginBreastCancerTissueSamplesAbstract:[Purpose]ToexploretheapplicationforclinicalassessmentofHER2geneexpressionstatusbychromogenicinsituhybridization(CISH)andtocomparetheresultswiththoseobtainedbyimmunohistochemistry(IHC).[Met
4、hods]CISHforHER2geneexpressionstatuswasperformedusingSPOT-LightHER2CISHTMonthearchivalparaffin-embeddedsectionsofbreastcancertissuesfrom40caseswithimmunohistochemicalstainingscoresof(+++),(++),(+)and(-).[Results]Ofthe8caseswithscore(+++)byIHC,7casesshowedHER
5、2geneamplificationbyCISH,1caseCISH-negative.Fiveofthe13caseswithscore(++)showedHER2geneamplification,theremaining8caseswereCISH-negative.Twoof10caseswithscore(+)showedHER2geneamplification,theremaining8caseswereCISH-negative.Allthepatientswithscoresnegative(
6、n=9)failedtoshowamplification.CertaindifferencetotheexaminationofHER-2/neustatus(kappa=0.458,P=0.003)wasfoundinthekindsofmethod.[Conclusion] Immunohistochemistry(IHC)isthefirstchoiceinprimaryscreeningforHER2expressionstatus.Becauseoftheobviousdiscrepanciesbe
7、tweenproteinexpressionandgeneamplification,patientswithscore(+++~+)byIHCshouldundergoCISHtesting.Keywords:breastneoplasms;immunohistochemistry(IHC);chromogenicinsituhybridization(CISH);7gene;HER2(c-erbB-2)HER2(c-erbB-2)是表皮生长因子受体家族的一员,具有酪氨酸激酶样活性的跨膜糖蛋白(p185),参
8、与酪氨酸激酶信号转导调控上皮细胞增殖[1]。研究证实约20%~30%的乳腺癌患者存在HER-2/neu基因扩增或蛋白过表达,是乳腺癌的一个独立不良预后因素,预示生存期短及易复发,对常规的化疗方案及激素治疗不敏感[2~4]。随着靶向治疗药物——Herceptin(针对HER2的人源化单克隆抗体)成功研制并运用于临床,显著延长了HER2过表达的转移性乳腺癌患者的生存期[5],且最近研究显示
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