乳腺癌Her-2/neu蛋白表达与基因扩增的相关性分析

目的:应用免疫组织化学(IHC)法和荧光原位杂交(FISH)法分析乳腺癌相关蛋白Her-2/neu表达情况及其与基因状态间的相关性,并探讨其临床价值。方法:采用PathVysionTM探针试剂盒中基因识别位点探针(LSI)Her-2/neu基因探针和着丝粒17探针(CEP 17),以FISH法分析96例浸润性乳腺癌患者的石蜡切片病理标本中17号染色体和Her-2/neu基因状态,并分析已经IHC证实的Her-2/neu不同表达水平与FISH结果间的一致性,同时分析Her-2/neu基因状态与相应蛋白表达水平间的关系。结果:96例浸润性乳腺癌患者的病理标本中,FISH法检测的Her-2/neu阳性率为26.0%。IHC检测结果为(-)或(+)者的FISH阳性率为13.2%(7/53),IHC(++)者的FISH阳性率为31.4%(11/35),IHC(+++)者的FISH阳性率为87.5%(7/8),三者都以Her-2/neu高度扩增(Her-2/neu/CEP17﹥10)为主。所有患者中17号染色体为非整体性者占45.8%(44/96),其中亚二体性(CEP17﹤2)占7.3%(7/96),多体性占38.5%(CEP17﹥2)(37/96)[包括低多体性(2     

双色荧光原位杂交技术检测乳腺癌石蜡切片人类表皮生长因子受体2基因扩增

目的:应用荧光原位杂交技术检测乳腺癌组织人表皮生长因子受体2(human epidermal growth factor receptor 2,Her-2)基因扩增情况.并对操作方法进行优化.方法:收集2008年4月至2008年10月期间我院乳甲科进行手术治疗的乳腺癌患者的癌组织病理切片,采用荧光原位杂交(FISH)技术检测Her-2基因扩增情况,并与免疫组化结果相比较,分析两者的相关性,同时优化操作方法.结果:收集的40例乳腺癌石蜡切片中,免疫组化检测Her-2蛋白表达(+++)有6例,(++)有22例,(+)有7例,(-)有5例.其中Her-2蛋白表达(+++)的标本FISH检测结果均为阳性,基因扩增与蛋白表达的符合率为100%;Her-2蛋白表达(++)的标本FISH结果有6例阳性,16例阴性,基因扩增与蛋白表达的符合率为27.3%.Her-2蛋白表达(+)及(-)的标本FISH结果均为阴性.Her-2蛋白表达(++)及以上的标本基因扩增与蛋白表达的符合率达到42.9%(r=0.584,P＜0.01).结论:FISH检测乳腺癌Her-2基因扩增的结果与IHC检测的蛋白表达结果符合率较好,可作为乳腺癌Her-2基因检测的一项新技术;在具体操作时,应注意严格控制切片厚度、消化时间及变性杂交温度等因素.     

荧光原位杂交技术检测乳腺癌Her-2/neu基因与免疫组化法检测C-erbB2蛋白的相关性研究

目的探讨荧光原位杂交技术(FISH)检测石蜡标本乳腺癌Her-2基因和免疫组化法(IHC)检测C-erbB2蛋白表达结果的相关性。方法采用荧光原位杂交技术(FISH)和免疫组化技术(IHC)分别检测203例乳腺癌患者手术切除标本的Her-2基因和C-erbB2蛋白表达,分析两种方法检测结果的相关性。结果203例中C-erbB2免疫组化阳性110例(54%),阴性93例;FISH结果阳性60例(阳性率29%),阴性143例。93例C-erbB2蛋白为阴性的患者中,Her-2基因表达阴性的87例,符合率93.6%(87/93);58例C-erbB2蛋白为+的患者中,Her-2基因表达为阳性的11例,符合率为19.0%(11/58);29例C-erbB2蛋白为++的患者中,Her-2基因表达为阳性的22例,符合率75.9%(22/29);23例C-erbB2蛋白为+++的患者中,Her-2基因表达为阳性的21例,符合率91.3%(21/23)。结论对于IHC法初筛为阴性(-)或强阳性(+++)的患者符合率(≥91.3%)较高,可选择性的进行FISH实验,尤其对于50岁以上年龄组的患者可基本确诊,对于IHC法初筛为阳性(+～++)的患者应再进行FISH实验以确定Her-2基因的状态。     

免疫组化法检测乳腺癌人类表皮生长因子受体2的临床意义

目的探讨免疫组化法(IHC)检测乳腺癌人类表皮生长因子受体2(Her-2)的临床意义。方法选取2018年3月～2019年6月我院收治的80例行乳腺癌切除术的乳腺癌患者,所有患者乳腺癌组织均经荧光原位杂交法(FISH)、IHC检测Her-2,将FISH检测结果作为"金标准",分析IHC检测乳腺癌Her-2的临床应用价值。结果入选80例乳腺癌患者中,经FISH检测Her-2阳性(基因有扩增)43例、占53.75%,阴性(基因无扩增)37例、占46.25%。以FISH检测为"金标准",IHC对乳腺癌Her-2检测阳性符合率为88.37%(38/43),阴性符合率为89.19%(33/37);IHC与FISH检测结果具有极好的一致性(Kappa=0.774)。结论 IHC检测乳腺癌Her-2具有较高临床应用价值,可为临床诊治提供有效指导。     

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.     

乳腺癌细胞块免疫细胞化学和荧光原位杂交(FISH)法HER-2检测对比研究

目的研究乳腺癌细针穿刺细胞蜡块采用免疫细胞化学的方法检测HER-2蛋白,并用FISH方法检测该方法的准确性。方法对40例乳腺癌患者进行细针穿刺细胞学检测,并用免疫细胞化学方法检测HER-2蛋白表达情况,并与术后肿块切除或者粗针穿刺标本FISH方法检测HER-2基因状态的结果进行对比统计,以此探讨乳腺癌免疫细胞化学检测HER-2蛋白表达情况的意义。结果 40例细胞块HER-2免疫细胞化学结果 :3+有3例,2+有2例,1+有4例,阴性31例。FISH检测结果 :HER-2免疫细胞化学3+的3例,HER-2基因均有扩增;HER-2免疫细胞化学2+的2例,其中1例HER-2基因有扩增;HER-2免疫细胞化学1+的4例,HER-2基因无扩增。结论本实验应用用乳腺癌穿刺细胞块用免疫细胞化学检测HER-2蛋白的表达情况,并和手术标本做FISH检测HER-2基因扩增状态进行对比,证实免疫细胞化学检测HER-2结果有较高的准确性。     

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。     

胃癌组织HER-2基因扩增和蛋白表达检测及临床意义

目的 探讨免疫组化（immunohistochemistry,IHC）法检测胃癌HER-2蛋白表达和荧光原位杂交（fluorescence in situ hybridization,FISH）法检测HER-2基因扩增的临床意义.方法 收集256例胃癌患者手术切除及胃镜活检的胃癌组织标本,分别采用IHC法及FISH法检测胃癌组织HER-2蛋白表达及基因扩增状态,并对结果进行统计学分析.结果 256例胃癌组织标本中,有26例HER-2蛋白表达阳性,阳性率为10.16％;46例HER-2基因有扩增,阳性率17.97％.26例HER-2蛋白表达（3＋）的标本中,24例有HER-2基因扩增,2例无扩增;95例HER-2蛋白表达（2＋）的标本中,20例有基因扩增,75例无扩增;90例HER-2蛋白表达（1＋）的标本中,2例有基因扩增,88例无扩增;45例HER-2蛋白表达（0）的标本中,HER-2基因均无扩增.IHC法和FISH法检测HER-2表达阳性率差异无统计学意义（P＞0.05）.结论 IHC法检测胃癌HER-2蛋白表达可作为临床治疗的初筛,HER-2蛋白表达（2＋）的患者应常规行FISH法,以确定HER-2基因扩增状态.FISH法检测结果具有较高的稳定性和可靠性,联合IHC法可更准确和客观评价胃癌预后,并指导临床选用靶向药物治疗.     

Impact of polysomy 17 on HER-2/neu immunohistochemistry in breast carcinomas without HER-2/neu gene amplification

Her-2/neu, a proto-oncogene located on chromosome 17, is an important biomarker in breast carcinoma. Immunohistochemistry (IHC) is currently the most widely used method for assessing Her-2/neu status. Some IHC-positive cases do not show Her-2/neu gene amplification by fluorescence in situ hybridization (FISH). It has been suggested that some of these IHC “false positive” results may in part be due to increased copy number of chromosome 17 resulting in increased Her-2/neu protein expression. We analyzed IHC and FISH data from 561 cases of invasive breast carcinoma to test this hypothesis. IHC and FISH for Her-2/neu were performed on formalin-fixed, paraffin-embedded sections of 561 invasive breast carcinomas. The IHC results were interpreted as 0, 1+, 2+, or 3+ according to the manufacturer’s recommended criteria. The FISH results were expressed as a ratio of Her-2/neu/chromosome 17 and were interpreted as positive (> = 2.0) or negative (<2.0) for gene amplification according to the manufacturer’s recommended scoring system. We found that in IHC 3+/FISH-negative cases (n = 15) both the average chromosome 17 copy number and the average Her-2/neu copy number were significantly higher than that in IHC (0 to 2+)/FISH-negative cases (n = 411) (2.45 vs. 1.68; P < 0.0001, and 3.19 vs. 1.95; P < 0.0001, respectively). In contrast, the IHC 2+/FISH-negative cases did not exhibit a significantly increased number of chromosome 17 compared to IHC 0 to 1+ cases. In addition, the average copy number of chromosome 17 in FISH-positive cases (n = 135) was significantly higher than that in FISH-negative cases (n = 426) (2.27 vs. 1.70; P < 0.0001), indicating a general association of increased chromosome 17 copy number with Her-2/neu gene amplification. Thus, our data suggest that IHC 3+ immunostaining without scorable gene amplification may indeed be, at least in some cases, the result of increased Her-2/neu protein expression secondary to an increased copy number of chromosome 17, associated with an increased total number of Her-2/neu gene copies per tumor cell.     

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。     

Her-2／neu和CD138在乳腺癌中表达及意义

目的检测乳腺癌组织中Her-2／neu和CD138的表达情况,探讨二者在乳腺癌中表达的意义和相互关系。方法应用免疫组化方法（S-P法）观察102例乳腺癌,30例乳腺良性病变组织（15例乳腺良性肿瘤与15例正常乳腺组织）Her-2／neu和CD138的表达。结果①102例乳腺癌组织和30例乳腺良性病变组织中Her-2／neu阳性表达率分别为58％和0％,CD138阳性表达率分别为41％-42％和100％。乳腺癌组织中Her-2／neu阳性表达率显著高于其在良性病变组织的阳性表达率（P〈0．01）,良性病变组织中CD138阳性表达率显著高于乳腺癌组织（P〈0．015）。②Her-2／neu的表达与乳腺癌的淋巴结转移、临床分期密切相关（P〈o．05）。③CD138表达与乳腺癌的淋巴结转移、临床分期呈负相关（P〈0．05）。结论乳腺癌组织中Her-2／neu阳性表达与CD138的阴性表达显著相关（P〈O．01）。     

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.     

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。     

HER-2/neu assessment in breast cancer by immunohistochemistry and fluorescence in situ hybridization: comparison of results and correlation with survival.

BACKGROUND: HER-2/neu immunohistochemistry (IHC) and fluorescence in situ hybridization (FISH) results guide breast cancer therapy; however, few studies compared the results and no published studies have correlated them with patient outcome. METHODS AND RESULTS: We compared results, cost, and turnaround time in 117 archival, invasive breast carcinomas and compared 50-month survival in 65 of these cases using commercial HER-2/neu IHC and FISH assays. Twenty-one of 112 FISH (19%) and 33 of 117 IHC cases (28%) were positive. Concordance was high overall (88%; 98 of 112 cases) and in IHC 3+ cases (88%; 14 of 16 cases) but low in IHC 2+ cases (35%; six of 17 cases). Survival correlated with IHC results in 3+ cases (P =.02) and FISH cases with signal ratio greater than 4.0 (P =.03), but not in IHC 2+ cases (P=.7). Cost and turnaround time were greater for FISH. CONCLUSION: IHC is appropriate for initial HER-2/neu assessment; however, patients with tumors scored less than 3+, particularly those interpreted as 2+, would benefit from FISH to more accurately assess HER-2/neu status and avoid inaccurate prognostication and inappropriate treatment.     

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.