乳腺癌HER-2基因扩增和蛋白表达与ER、PR的关系及临床意义

目的探讨HER-2基因及其蛋白在乳腺癌中扩增及表达状况,并研究其与ER、PR的相关性。方法用FISH技术和IHC技术检测51例乳腺癌新鲜标本中的HER-2基因的扩增及蛋白表达情况,并检测ER、PR进行对比分析。结果51例中10例HER-2蛋白表达强阳性（＋＋＋）,6例阳性（＋＋）,2例弱阳性（＋）,33例阴性,其中基因过表达率（IHC检测＋＋／＋＋＋）为31．4％;FISH检测中基因扩增14例,37例无扩增,扩增率为27．5％。IHC（＋＋／＋＋＋）与FISH检测符合率87．5％（P〈0．05）,ER、PR表达情况与HER-2基因及蛋白扩增呈负相关,ER和PR均为阴性的HER-2基因扩增率及蛋白表达率明显高于ER和（或）PR阳性的患者（IHC50％与24．3％,P〈0．05;FISH42．9％与19．4％,P〈0．05）。结论HER-2的扩增和蛋白过度表达提示乳腺癌预后不良,HER-2与ER、PR在乳腺癌的治疗中起重要作用,IHC可以作为检测HER-2基因状态的首选方法,但对于HER-2（＋＋）需要进一步进行FISH检测。     

乳腺癌HER-2基因荧光原位杂交检测的临床应用

目的研究荧光原位杂交（FISH）用于乳腺癌HER-2检测的临床应用及HER-2基因扩增与乳腺癌临床病理的相关性。方法应用FISH技术和免疫组化（IHC）技术检测40例乳腺浸润性导管癌石蜡包埋标本,对比分析。结果IHC检测CerbB-2（3＋）/（2＋）/（1＋或0）,其FISH阳性率分别为85.7%、50%、5.9%。24例腋窝淋巴结阳性者,其FISH检测HER-2基因扩增10例（P=0.0399）。ER/PR阴性8例,其HER-2基因扩增6例（P〉0.05）。结论IHC检测HER-2蛋白有很高的假阳性及假阴性,FISH有效性及准确性显著高于IHC,可在临床广泛推广应用。HER-2基因扩增与腋窝淋巴结阳性相关。     

荧光原位杂交法与免疫组织化学法检测乳腺癌HER-2基因扩增及蛋白表达的对比研究

目的比较桂林市荧光原位杂交法（FISH）和免疫组织化学法（IHC）检测乳腺癌组织中人表皮生长因子受体（HER-2）基因扩增及其蛋白表达情况的一致性．探讨FISH与IHC检测乳腺癌HER-2基因状态的临床意义。方法应用IHC和FISH对50例乳腺癌患者HER-2蛋白表达、基因扩增情况及17号染色体倍体性进行检测,分析IHC与FISH检测HER-2基因状态的差异以及HER-2蛋白状态与17号染色体倍体性的相关性。结果FISH与IHC结果总的符合率为82．0％．两者之间存在较好的一致性fkappa=0．6401,FISH检测IHC结果为3＋、2＋和0／1＋者的符合率分别为92．9％、70．0％和80．8％;IHC3＋及2＋者出现17号染色体多体性的几率比IHC0／1＋者高（P〈0．05）。结论FISH可以准确和稳定地检测乳腺癌组织中HER-2的基因状态及17号染色体倍体性：FISH检测IHC3＋者符合率较高,FISH与IHC的差异主要在于IHC2＋和IHC0／＋组,IHC仅作为检测HER-2基因状态的初筛方法．而IHC结果为2＋或0／1＋者的HER-2基因状态必须应用FISH进一步确定。     

荧光原位杂交检测胃癌中HER-2基因状态

目的 探讨胃癌中HER-2基因扩增与HER-2蛋白过表达的关系.方法 运用免疫组化(IHC)和荧光原位杂交(FISH)技术,对手术切除的84例胃癌石蜡标本进行HER-2状态的检测.结果 84例中,19例HER-2蛋白(+)(22.6%),其中HER-2基因扩增7例(8.3%);12例HER-2蛋白(++++/++)(14.3%)中,HER-2基因扩增5例(6%),占高表达组的41.7%;72例HER-2蛋白(+/0)(85.8%)中,HER-2基因扩增2例(2.4%).结论 HER-2蛋白(+++/++)与HER-2基因扩增密切相关,故这类患者可考虑先做IHC初步筛选,再做FISH确诊,从而为胃癌分子靶向治疗提供有价值的信息.     

乳腺癌HER-2检测方法比价及其与ER、PR、淋巴结转移的相关性分析

【目的】比较免疫组化（IHC）与荧光原位杂交（FISH ）检测乳腺癌 HER‐2的一致性;分析 HER‐2与 ER 、PR 及淋巴结转移的相关性。【方法】采用回顾性分析,统计本院2010年至2014年 IHC 法检测的1003例乳腺癌手术标本 HER‐2蛋白及 ER 、PR 的表达情况,其中434例浸润性癌行 FISH 检测 HER‐2基因扩增状态,比较 IHC 与 FISH 方法检测 HER‐2的差异;分析 IHC 与 FISH 检测乳腺癌 HER‐2与 ER 、PR 的相关性;同时分别分析 HER‐2蛋白表达情况及 HER‐2基因扩增情况与淋巴结转移的相关性。【结果】① IHC 检测1003例乳腺癌 HER‐2蛋白表达（处）阳性率为23．93％,其中行 FISH 检测的434例浸润性癌 HER‐2基因扩增率为26．27％;IHC 检测 HER‐2蛋白（处）的病例与 FISH 检测 HER‐2基因扩增符合率为85．71％;②HER‐2蛋白表达（处）和 HER‐2基因扩增均与 ER 、PR 表达呈显著负相关;③ HER‐2蛋白表达阳性（处）病例中淋巴结转移率为45．16％;HER‐2蛋白表达阴性（0／＋）病例中淋巴结转移率为46．99％,HER‐2蛋白表达可疑（触）病理中淋巴结转移率为49．45％,组间比较差异无统计学意义（ P ＝0．1398）;HER‐2基因扩增病例中淋巴结转移率为51．58％,HER‐2基因无扩增病例中淋巴结转移率为51．99％,两者差异无统计学意义（P ＝0．346）。【结论】IHC 检测 HER‐2蛋白（－）／（＋）和（处）的病例与 FISH 检测 HER‐2基因扩增有较好的一致性;HER‐2蛋白（触）的病例需要进一步行 FISH 检测确定 HER‐2基因扩增状态,以准确指导把向药物治疗;IHC 与 FISH 检测乳腺癌 HER‐2均与 ER 、PR 呈显著负相关性,与淋巴结转移无相关性。     

乳腺癌HER-2、FISH分子病理检测技术及临床意义

目的:探讨乳腺癌HER-2、FISH分子病理检测技术及临床意义。方法:选取江苏省人民医院病理科2017年8月份分析的100个乳腺癌HER-2阳性蜡块为研究对象,分别采用免疫组化技术(IHC)和荧光原位杂交技术(FISH)对蜡块标本中的HER-2基因扩增以及HER-2蛋白表达进行比对分析。结果:FISH检HER-2基因扩增阳性30例(30%),IHC检测蛋白表达(-^+)80例,HER-2蛋白表达(++)4例,HER-2蛋白表达(+++)8例。结论:IHC检测HER-2蛋白表达(++^+++)与FISH检测HER-2基因的扩增具有很高的一致性。乳腺癌HER-2 FISH分子病理检测技术对乳腺癌诊断及分型、发生、发展,对于IHC(++^+++)者需要进一步进行FISH检测,提高检测的准确性。     

荧光原位杂交法与免疫组织化学法检测乳腺癌HER-2基因扩增及蛋白表达的对比研究

目的 比较桂林市荧光原位杂交法(FISH)和免疫组织化学法(IHC)检测乳腺癌组织中人表皮生长因子受体(HER-2)基因扩增及其蛋白表达情况的一致性,探讨FISH与IHC检测乳腺癌HER-2基因状态的临床意义.方法 应用IHC和FISH对50例乳腺癌患者HER-2蛋白表达、基因扩增情况及17号染色体倍体性进行检测,分析IHC与FISH检测HER-2基因状态的差异以及HER-2蛋白状态与17号染色体倍体性的相天性.结果 FISH与IHC结果 总的符合率为82.0%,两者之间存在较好的一致性(kappa=0.640),FISH检测IHC结果 为3+、2+和0/1+者的符合率分别为92.9%、70.0%和80.8%;IHC3+及2+者出现17号染色体多体性的几率比IHC0/1+者高(P<0.05).结论 FISH可以准确和稳定地检测乳腺癌组织中HER-2的基因状态及17号染色体倍体性;FISH检测IHC3+者符合率较高,FSH与IHC的差异主要在于IHC2+和IHC0/+组,IHC仅作为检测HER-2基因状态的初筛方法 ,而IHC结果 为2+或0/1+者的HER-2基因状态必须应用FISH进一步确定.     

乳腺癌HER-2基因荧光原位杂交检测的临床应用

目的研究荧光原位杂交(FISH)用于乳腺癌HER-2检测的临床应用及HER-2基因扩增与乳腺癌临床病理的相关性。方法应用FISH技术和免疫组化(IHC)技术检测40例乳腺浸润性导管癌石蜡包埋标本,对比分析。结果IHC检测CerbB-2(3+)/(2+)/(1+或0),其FISH阳性率分别为85.7%、50%、5.9%。24例腋窝淋巴结阳性者,其FISH检测HER-2基因扩增10例(P=0.0399)。ER/PR阴性8例,其HER-2基因扩增6例(P0.05)。结论IHC检测HER-2蛋白有很高的假阳性及假阴性,FISH有效性及准确性显著高于IHC,可在临床广泛推广应用。HER-2基因扩增与腋窝淋巴结阳性相关。     

IHC联合FISH 检测胃癌中HER2与CK8/18、p53、CEA的表达及其相关性研究

目的探讨IHC联合FISH检测胃癌中HER2及其与CK8/18、p53、CEA表达的相关性研究。方法以我院2017-01—2018-06月收治的120例胃癌手术患者为研究对象,分别采用免疫组织化学(IHC)检测胃癌组织中HER2蛋白表达情况与荧光原位杂交技术(FISH)检测胃癌组织中HER2基因扩增情况,并采用IHC方法检测胃癌组织中CK8/18、p53、CEA蛋白的表达情况,分析HER2与CK8/18、p53、CEA表达的相关性。结果120例胃癌组织中HER2表达水平,IHC检测结果显示为HER2蛋白过表达(3+)的阳性率为11.7%(14/120),FISH检测结果显示HER2基因扩增的阳性率为17.5%(21/120);HER2基因扩增与CK8/18、p53及CEA蛋白的表达越高,则胃癌发生淋巴结转移及浸润深度的概率越大(P0.05);HER2基因扩增与CK8/18、p53及CEA蛋白的表达呈正相关(P0.05)。结论胃癌HER2基因扩增与CK8/18、p53及CEA蛋白的表达与其是否发生淋巴结转移及浸润深度有关,可作为患者病情严重程度与预后的一个有效评估指标。     

乳腺癌HER-2基因扩增与临床病理特征的关系

目的 比较荧光原位杂交(FISH)和免疫组化(IHC)检测乳腺癌组织中人表皮生长因子受体2(HER-2)基因扩增及蛋白表达的一致性,并探讨HER-2基因扩增与临床病理特征的关系.方法 回顾性分析本院采用FISH法检测HER-2基因状态的112例乳腺癌,与IHC结果进行一致性分析,并对HER-2基因扩增与年龄、组织学分级、淋巴结转移及激素受体的关系进行统计学分析.结果 112例浸润性乳腺癌中,HER-2基因扩增57例,其中IHC检测HER-2(3+)者27例,(2+)者29例,(1+)者1例,分别占IHC病例总数的96.4％ (27/28)、48.3％ (29/60)和5.3％ (1/19).HER-2基因扩增与雌/孕激素受体呈负相关,而与年龄、组织学分级、淋巴结转移差异不显著.结论 对于IHC检测HER-2(3+)、(+或0)的病例可选择性做FISH进行确认,对于HER-2(2+)病例应常规进行FISH检测,以便更加准确和客观地对治疗和预后进行评价.     

荧光原位杂交技术检测乳腺癌Her-2/neu扩增

目的：探讨荧光原位杂交技术（FISH）检测乳腺癌Her-2/neu的扩增情况,比较FISH法与免疫组织化学（I HC）法检测结果的一致性。方法：收集乳腺癌患者手术切除的肿瘤标本50例。经石蜡包埋,组织切片后,应用FISH法检测Her-2/neu扩增情况,I HC法检测Her-2/neu蛋白表达情况,并对两种检测方法的结果进行统计学分析。结果：50例标本中FISH阳性17例,FISH阴性33例,FISH阳性率34%（17/50）。50例标本中I HC（～）14例,I HC（0～＋）36例,I HC蛋白表达率28%（14/50）。FISH法与I HC法检测结果的总符合率为82%（41/50）（K=0.581）。结论：FISH法具有较高的稳定性与可靠性,临床开展FISH法检测Her-2/neu基因扩增情况作为I HC法的补充,可以更加准确和客观地对乳腺癌患者的治疗和预后进行评价。     

乳腺癌HER2检测：单色与双色FISH评价系统的比较研究

目的旨在通过比较乳腺癌HER2检测单色与双色FISH评价系统的判读,提高HER2检测准确性、重复性以及改善对曲妥珠治疗反应的预测能力。方法按照2007年美国临床肿瘤学协会（ASCO）/美国病理医师学院（CAP）推荐的标准化操作,用免疫组化（Immunohistochemistry,IHC）和荧光原位杂交法（Fluorescence in Situ Hybridization,FISH）分别检测181例浸润性乳腺癌石蜡包埋标本中HER2基因的扩增及蛋白表达情况。比较IHC与FISH两种检测方法、双色FISH（Dual-Color FISH,D-FISH）与单色FISH（Single-Color FISH,S-FISH）两种评分系统的结果。结果本组IHC与D-FISH（P〈0.000 1）及S-FISH（P〈0.000 1）结果显著相关,其中IHC 0及3＋患者中,FISH与IHC结果的一致性达到了90%以上,而IHC 1＋~2＋组,结果吻合率低。D-FISH与S-FISH结果一致性为95%（χ2=138.38,P〈0.000 1）。两种评分系统对于HER2基因无扩增的判断基本一致,而对临界值的判定差异较大。结论 S-FISH评分系统对临界值的判断标准有待进一步商榷,对S-FISH诊断为临界值的病例应再行D-FISH检测,以便为临床治疗提供更精确地信息。     

Real-time quantitative PCR of microdissected paraffin-embedded breast carcinoma: an alternative method for HER-2/neu analysis

We studied the feasibility of using real-time quantitative PCR to determine HER-2 DNA amplification and mRNA expression in microdissected formalin-fixed, paraffin-embedded breast tumors and compared this with standard immunohistochemistry (IHC) and fluorescent in situ hybridization (FISH) methods. Study cases (27 carcinomas and 3 ductal breast carcinoma in situ (DCIS) cases) showed varying Her-2 expression as determined by IHC (HercepTest). In carcinomas, there was a good correlation between HER-2 DNA amplification and strong HER-2 protein expression detected by FISH and IHC, respectively. A single DCIS case was amplified in FISH, but not in IHC. Both HER-2 gene amplification and expression could be quantified in microdissected paraffin-embedded tumors using real-time PCR, DNA and RNA being successfully detected in 146 of 150 (97%) and 141 of 150 (94%) samples, respectively. PCR analysis for HER-2 DNA amplification using the LightCycler HER2/neu DNA Quantification kit (Roche Molecular Biochemicals, Mannheim, Germany) correlated fairly well with IHC and FISH. All IHC HER-2 3+ tumors were amplified according to the kit, as was the FISH-amplified DCIS case. DNA-PCR identified five additional tumors as being amplified. Interestingly, all these scored 2+ with the HercepTest, but were negative using FISH. We believe that real-time quantitative PCR analysis of HER-2 DNA amplification following microdissection represents a useful supplementary or perhaps even an alternative technique for establishing HER-2 status in paraffin-embedded tumors.     

HER-2 DNA quantification of paraffin-embedded breast carcinomas with LightCycler real-time PCR in comparison to immunohistochemistry and chromogenic in situ hybridization

OBJECTIVES: To compare the detection of HER-2 status by real-time PCR, on paraffin-embedded breast carcinomas, in respect to immunohistochemistry (IHC) and chromogenic in situ hybridization (CISH). DESIGN AND METHODS: Paraffin-embedded breast carcinomas collected from 85 patients diagnosed with early stage breast cancer were analyzed for HER-2 gene amplification by real-time PCR and CISH, as well as for HER-2 protein expression by IHC. RESULTS: HER-2 gene amplification was observed in 19 (22.4%) of 85 breast cancer patients by real-time PCR and in 19 (22.4%) of 85 patients by CISH. Strong (3+) HER-2 protein over-expression was observed in 13 (15.3%) out of 85 patients. Moreover, there were 4 out of 85 (4.7%) patients that had moderate (2+) HER-2 protein over-expression, while 68 out of 85 (80%) patients had no HER-2 protein over-expression by IHC. There were strong concordance rates between real-time PCR and IHC (79/85, 92.9%, p<0.0001) and real-time PCR and CISH (77/85, 90.6%, p<0.0001). The concordance rate between the three methods was 90.6% (p<0.0001). CONCLUSIONS: Our data show that the results obtained for amplification of HER-2 by real-time PCR on the LightCycler are comparable to those obtained by IHC and CISH.     

应用FISH和IHC技术检测中国乳腺癌患者HER-2基因状态及蛋白表达的前瞻性多中心研究

目的 对比研究乳腺癌患者IHC检测c-erbB2蛋白表达和FISH检测HER-2/neu基因扩增情况,并探讨HER-2基因状态与各临床病理特征的相关性.方法 本研究为全国73家中心参与的前瞻性研究.收集2007年10月至2009年9月乳腺癌患者标本3 249份,应用IHC和FISH两种方法分别检测3 249份乳腺癌患者手术的石蜡标本c-erbB2蛋白表达和HER-2基因扩增情况,并分析HER-2基因状态与患者各临床病理特征的关系.结果 全组患者IHC检测c-erbB2蛋白表达阳性率为46.9%(1477/3149),FISH检测HER-2基因扩增率为42.6%(1342/3149),其中IHC评分为3+和0分时,与FISH检测的一致性较高,分别为94.1%(892/948)和89.9%(660/734),而IHC 1+和2+组与FISH的一致性较低,分别为71.0%(514/725)和55.9%(415/742).同时,HER-2基因扩增与激素状态中雌激素与孕激素均阴性(r=0.45,P<0.01)、组织分级Ⅲ级(r=0.51,P<0.01)、淋巴结转移数目多于4枚(r=0.35,P<0.01)、临床分期Ⅲ/Ⅳ期(r=0.33,P<0.01)、肿瘤直径>2 cm(r=0.38,P<0.01)、绝经后(r=0.24,P<0.01)有相关性,与年龄(r=0.36,P=0.068)、CA125(r=0.11,P=0.722)、CA153(r=0.23,P=0.45)和CEA(r=0.22,P=0.074)表达情况、淋巴结转移(r=0.15,P=0.18)、肿瘤个数(r=0.21,P=0.056)及脉管瘤栓(r=0.12,P=0.133)无相关性.结论 FISH和IHC两种方法检测HER-2表达状态具有较高的一致性.结合实际情况包括费用仪器等限制,在IHC作为初筛的基础上,仍然推荐FISH作为检测HER-2基因扩增的标准方法.FISH技术检测乳腺癌患者HER-2基因表达状态可为临床指导用药和预后评价提供更可靠的依据.     

Evaluation of the quantitative analytical methods real-time PCR for HER-2 gene quantification and ELISA of serum HER-2 protein and comparison with fluorescence in situ hybridization and immunohistochemistry for determining HER-2 status in breast cancer patients

BACKGROUND: HER-2 status is generally determined by immunohistochemistry (IHC) or fluorescence in situ hybridization (FISH). Both methods are only semiquantitative, require a tumor sample, and can be difficult to reproduce. We compared these methods with 2 quantitative approaches, one measuring HER-2 gene copy number in tissue by real-time quantitative PCR (qPCR), and the other measuring shed HER-2 protein in serum by ELISA in patients with metastatic disease. METHODS: We analyzed 52 cases of metastatic breast cancer for which both serum collected at the diagnosis of metastasis and stored primary breast tumor specimens were available. The within- and between-run imprecision of real-time qPCR and ELISA were evaluated according to Clinical and Laboratory Standards Institute (formerly known as NCCLS) recommendations. Concordance among the 4 methods was assessed by calculating the kappa statistic and its 95% confidence interval (95% CI). RESULTS: The CVs for within- and between-run imprecision were both <10% with qPCR and ELISA. There was good agreement of results between qPCR and IHC (kappa = 0.81; 95% CI, 0.64-0.99), qPCR and FISH (kappa = 0.77; 95% CI, 0.58-0.96), ELISA and IHC (kappa = 0.65; 95% CI, 0.41-0.89); and ELISA and FISH (kappa = 0.69; 95% CI, 0.46-0.92). CONCLUSIONS: Measurements of HER-2 gene expression by qPCR and of serum HER-2 protein by ELISA are highly reproducible approaches for determining HER-2 status in metastatic breast cancer. In addition, ELISA eliminates the need for biopsy.     

Borderline HER-2 breast cancer cases: histochemical versus real-time PCR analysis and impact of different cut-off values

Seventy-one cases that had resulted borderline for HER-2 protein expression at conventional immunohistochemical assay (2+) were assessed for HER-2 gene amplification by real-time PCR and by FISH in accordance with the manufacturer's recommendations (gene amplification with ratio >or=2 in both methods). Thirty-three out of 71 cases (47%) resulted amplified at real-time PCR analysis, whereas 15 cases resulted positive at FISH (21%). Apparently, PCR was more sensitive than FISH in HER-2 determination, only 10 cases resulting amplified in both tests. When the mean ratio value obtained in all PCR experiments was adopted as threshold in determining HER-2 gene amplification, the apparent sensitivity of PCR was reduced but correlation between PCR and FISH results was dramatically increased. Furthermore, when the mean PCR ratio value observed in the FISH-positive group was chosen as threshold, the best agreement between PCR and FISH results was achieved. Therefore, we found that the proposed threshold ratio value of >or=2 is not accurate in separating HER-2 amplified and non-amplified cases. We suggest that the threshold ratio value in PCR tests should be determined in each laboratory using FISH controlled cases. Finally, above certain in-lab generated threshold values, PCR might be proposed as a highly predictive positive test in HER-2 assessment.