Shed HER2 surrogacy evaluation in primary breast cancer patients: a study assessing tumor tissue HER2 expression at both extracellular and intracellular levels

The aim of the present study was to investigate serum HER2 extracellular domain (ECD) as a putative surrogate marker of the shedding phenomenon of HER2 receptor from the tumor tissue of primary breast cancer (BC) patients. A pilot retrospective study was conducted on 100 matched serum and tissue samples from patients with node-positive primary BC, stage II/III. Analysis of association and concordance between serum HER2 ECD levels (measured by chemiluminescence immunoassay) and the expression in matched tumor tissue of HER2 ECD and intracellular receptor domain (ICD) (determined by immunohistochemistry) were performed. The median serum HER2 ECD level was 9.4?ng/ml and cutoff values were set at 15.2?ng/ml or 13.0?ng/ml. HER2 ICD and ECD were overexpressed in tumor tissue of 19.8% and 6.9% of patients, respectively. Statistically significant associations were found between serum HER2 ECD levels and tissue expression of both HER2 ICD and ECD (p?<?.001; Fisher analysis). Moreover, strong concordances were found between serum HER2 ECD levels and tissue expression of HER2 ICD or ECD (cutoff 15.2?ng/ml: 80 and 92.5%, respectively). Our findings support a role for serum HER2 ECD as a surrogate marker of tissue HER2 status in primary BC, both for HER2 ICD or ECD expression.     

Serum HER2/ECD value in stage I and II early breast cancer �C need of a lower cut-off?

BACKGROUND: HER2 overexpression is well-established risk factor of worse prognosis in metastatic and early breast cancer. HER2 positivity can be determined from tumor tissue by immunohistochemical staining or by fluorescent in situ hybridization, or from serum by measuring concentration of HER2 receptor extracellular domain (HER2/ECD). HER2/ECD correlates well with worse prognosis in metastatic and locally advanced (stage III) disease if serum concentration is >15 ng/ml, but there are no consistent data for patients with early breast cancer. METHODS AND RESULTS: 41 patients with stage I and II breast cancer and 52 healthy controls were included into the study. HER2/ECD was determined before surgery and correlated with HER2/neu overexpression, Ki67, hormone receptor status and disease stage, and compared with value in healthy controls. Mean serum HER2/ECD concentration in patients was 8.62 ng/ml and 5.78 ng/ml in controls, and the difference was statistically significant (p = 0.000061). The best diagnostic cut-off value was 7.7 ng/ml, with 76.92% sensitivity and 72.92% specificity. Positive predictive value of the test was 69.77% and negative predictive value was 79.55%, with 74.71% of patients correctly classified. Serum HER2/ECD correlated with hormone receptors status, and no correlation with histological overexpression has been observed. CONCLUSION. Serum HER2/ECD concentration of ≥7.7 ng/ml has possible diagnostic value in stage I and II breast cancer. It should not be used as a determinant of HER2 positivity. Prognostic significance of HER2/ECD in early breast cancer, its correlation with hormone receptor status, and interconnection between hormone receptors and HER2 receptor signaling should be further analyzed, since it may have therapeutic implications.     

HER-2 protein concentrations in breast cancer cells increase before immunohistochemical and fluorescence in situ hybridization analysis turn positive.

BACKGROUND: The level of HER-2/neu in breast cancer cells is normally measured by immunohistochemistry (IHC) and/or fluorescence in situ hybridization (FISH). It determines whether patients should be treated with trastuzumab (Herceptin). In this study, HER-2 protein in breast cancer tissue was measured using a quantitative method. METHODS: Tissue samples of malignant and adjacent benign breast tissue were collected from 118 consecutive women admitted for surgical treatment of breast cancer. The HER-2 protein concentration was determined by 2 HER-2 assays: ELISA and the Bayer ADVIA Centaur assay. Paraffin-embedded tissue sections of the corresponding tumors were analyzed by IHC and FISH. RESULTS: Increased HER-2 concentrations in cancer tissue were found compared to autologous reference tissue (p<0.0001, Wilcoxon test) and normal breast tissue (p<0.0001, Mann-Whitney test). Good concordance rates were observed between the methods: 95.8% for IHC and FISH; 86.4% for IHC and ELISA; and 87.3% for FISH and ELISA. The HER-2 positivity rate was determined to 26.3% by ELISA, 12.7% by IHC and 16.9% by FISH. No correlation was found with tumor grade, axillary node status or serum HER-2 levels. CONCLUSIONS: Detection of HER-2 overexpression by measuring HER-2 in tissue extracts by ELISA seems to be more sensitive than IHC and FISH. This suggests that some patients deprived of Herceptin treatment may benefit from this treatment and may also explain the conversion phenomenon from HER-2-negative to HER-2-positive observed in relapse and metastatic disease.     

复发转移乳腺癌患者血清HER2水平与组织表达状态的相关性

目的探讨复发转移乳腺癌患者血清HER2水平与组织表达状态间的联系,分析血清HER2检测是否可作为组织HER2检测的补充手段。方法采用酶联免疫吸附试验(ELISA)对72例女性复发转移乳腺癌(组织HER2阳性组30例,组织HER2阴性组42例)和30例健康体检女性(健康对照组)进行血清HER2水平检测,将各组的血清HER2水平进行比较,并与组织HER2表达状态进行对比分析。结果组织HER2阳性组的血清HER2水平显著高于组织HER2阴性组和健康对照组,差异有统计学意义(P<0.0001);组织HER2阴性组血清HER2水平与健康对照组比较差异无统计学意义(P=0.163);组织HER2阳性组有22例血清HER2阳性,阳性符合率为73.4%(22/30),组织HER2阴性组有32例血清HER2阴性,阴性符合率为78.6%(32/42)。血清HER2水平与组织HER2表达状态呈正相关(χ2=21.626,r=0.547)。结论血清HER2水平与组织HER2表达状态呈正相关,且血清HER2可以作为组织HER2检测的补充手段。     

FISH和IHC检测乳腺癌患者HER2/neu基因影响因素的研究

目的 观察乳腺癌石蜡包埋组织荧光原位杂交(FISH)和免疫组化(IHC)检测乳腺癌患者HER2/neu基因状态,比较不同切片方法及不同结果判读人员的经验区别.方法 55例乳腺癌石蜡包埋组织分组切片和观察判读,观察1组:由技术人员选定区域切片,平行检测HER2/neu基因状态;观察2组:先切片做HE染色,由初级病理医师根据病理图像选定区域后切片,平行检测HER2/neu基因状态,并由初级病理医师分析结果;观察3组,由中、高级病理医师根据病理图像选定区域后重新切片检测,判读分析.结果 观察1组和观察2组,IHC(-)和IHC(1+)与FISH检测一致性较好,IHC(2+)和IHC(3+)与FISH检测的相符率分别为33.33%/33.33%,50.00%/100.00%;2组的一致性分别为中等和较好(K1=0.478,K2=0.659);共有10例患者入选观察3组,重新切片后,6例患者结果不同,其中3例为取材误差,3例为判读误差,3例取材误差均出现在观察1组.结论 FISH和IHC检测乳腺癌患者HER2/neu基因状态受到制片、结果判读等多种因素影响,实验室应制定标准化的操作程序,严密的质量控制和质量保证措施,才可得到准确而可靠的结果.     

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.     

HER2 testing in patients with breast cancer: poor correlation between weak positivity by immunohistochemistry and gene amplification by fluorescence in situ hybridization

OBJECTIVE: To evaluate amplification of the HER-2/neu gene by fluorescence ir situ hybridization (FISH) in tumors with weakly positive (2+) immunohistochemical staining. METHODS: A total of 1556 breast tumor biopsy specimens were referred to Mayo Medical Laboratories, Rochester, Minn, for HER2 testing between August and December 2000. Immunohistochemical (IHC) analysis was performed with use of a diagnostic test for the assessment of HER2 overexpression, the HercepTest. The IHC-stained slides were interpreted and scored on a scale ranging from 0 to 3+ according to Food and Drug Administration-approved guidelines. All specimens scored as 2+ were also routinely evaluated by FISH with use of a HER-2/neu DNA probe kit (PathVysion). Specimens were determined to be amplified if the ratio of HER-2/neu signals to chromosome 17 centromere (CEP17) signals was higher than 2.0. RESULTS: Thirty-eight percent of the specimens evaluated with the HercepTest were scored 0, 35% were 1+, 14% were 2+, and 13% were 3+. Of the 216 tumor specimens scored as 2+, 26 (12%) had a high level of HER-2/neu gene amplification, 54 (25%) demonstrated duplication of HER2, 4 (2%) deleted HER-2/neu and/or CEP17, and 123 (57%) had no apparent HER-2/neu anomaly, no apparent CEP17 anomaly, nor apparent single gain (aneusomy) of CEP17. CONCLUSION: We recommend that all specimens with a 2+ HercepTest result be evaluated by FISH for HER-2/neu gene amplification. The results of both assays should be considered before making a decision to recommend anti-HER2 therapy.     

Quantitative PCR--new diagnostic tool for quantifying specific mRNA and DNA molecules: HER2/neu DNA quantification with LightCycler real-time PCR in comparison with immunohistochemistry and fluorescence in situ hybridization

Previously, polymerase chain reaction (PCR) technology has been hampered by its inability to generate quantitative results, a drawback inherent to the high degree of amplification taking place in the reaction. Recently, PCR techniques have been described with the potential of quantifying the amount of mRNA or DNA in biological samples. In this study quantitative PCR was used to investigate the role of the EGF (epidermal growth factor) system in cancer both for measurements of mRNA concentrations and for measurements of the number of copies of specific genes. It is shown that the mRNA expression of a subset of ligands from the EGF system is increased in bladder cancer. Furthermore, measurement of the mRNA concentration gives important information such as the expression of these ligands correlated to the survival of the patients. In addition to the alterations at the mRNA level, changes also can occur at the DNA level in the EGF system. Thus, it has been demonstrated that the number of genes coding for the human epidermal growth factor receptor 2 (HER2) is increased in a number of breast tumors. It is now possible to treat breast cancer patients with a humanized antibody reacting with HER2, and the treatment is considered to be justified if the tumor displays an increased amount of HER2. For this reason there is a need for techniques suitable for HER2 measurements. A LightCycler real-time PCR method used for HER2/neu DNA quantification was evaluated and the results compared with those obtained by immunohistochemistry (IHC) and fluorescence in situ hybridization (FISH). Tumor biopsies were collected from 112 patients diagnosed with early breast cancer from January 1990 to March 1994. The samples were analyzed for HER2 DNA amplification by real-time PCR on LightCycler and by FISH and for HER2 protein expression by IHC. Inter-assay variation for HER2 measured by LightCycler was 10% (x =3.1; n=17). Amplification > or = 2 was observed in 19% of the patients. Concordance rates between real-time PCR and the other methods were 91% (IHC) and 92% (FISH). The correlation between real-time PCR and FISH was highly significant (p < 0.001). The "LightCycler-HER2/neu DNA quantification kit" produces results with a high level of reproducibility and its ease of use allows rapid screening for amplification of HER2. In this paper useful information is given on how real-time PCR compares with FISH and IHC. The data show that results obtained for amplification of HER2 by real-time PCR on the LightCycler instrument are comparable to results obtained by IHC and FISH.     

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。     

人类表皮生长因子受体2在乳腺癌表达与临床的相关病理特征分析

目的 评估人类表皮生长因子受体2(HER2)预测价值,并分析其与常见的组织病理学参数的相关性。方法 收集陕西省人民医院2011年～2014年之间160例接受手术治疗的乳腺癌患者组织标本,通过免疫组织化学方法(IHC)和荧光原位杂交(FISH)检测 HER2水平,通过χ²检验用来评估HER2基因扩增状况及不同临床病理特性的相关性,临床参数包括:肿瘤大小、组织学分级、雌激素受体(ER)和孕激素受体(PR)表达,年龄、绝经情况和Ki-67指数。结果 HER-2表达与组织学分级、淋巴结转移、ER水平、PR,Ki-67指数差异存在统计学意义(均P<0.05)。相对于HER-2⁺组患者,HER-2^-病变多表现为雌激素ER阴性、孕激素阴性、ER阴性、淋巴结阴性、ki-67≥20%。结论 HER-2表达与多种临床病理因素存在相关性。     

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.     

Prognostic markers in breast cancer: the reliability of HER2/neu status in core needle biopsy of 325 patients with primary breast cancer

INTRODUCTION: The assessment of HER2/neu overexpression in tissue provides information about one of the most relevant prognostic and predictive markers in breast cancer: overexpression of HER2/neu is associated with worse prognosis in primary breast cancer. Since core needle biopsy is increasingly used for the diagnosis of breast cancer, the purpose of this study was to assess the reliability of HER2/neu evaluation using this technique in patients with primary breast cancer. PATIENTS AND METHODS: We investigated the accuracy of immunohistochemical assessment of HER2/neu in core needle biopsies compared with surgically obtained specimens in 325 patients with primary breast cancer. In patients strongly positive for HER2/neu, additional fluorescence in situ hybridization (FISH) analysis of needle biopsies was performed. RESULTS: Using immunohistochemistry alone, accuracy of HER2/neu assessment in core biopsies in relation to surgically removed specimens was 92% and increased to 96% with additional FISH analysis (weighted Kappa coefficient: 0.86). DISCUSSION: As proven with this large series of patients, the assessment of HER2/neu status by core needle biopsy in breast cancer is accurate. Notwithstanding, in order to minimize the number of false-positive results, strongly positive core needle biopsies identified using immunohistochemistry should be confirmed by FISH analysis.     

ELISA方法检测乳腺癌患者血清HER2的临床价值

目的：HER2基因扩增和HER2蛋白过表达是乳腺癌患者预后不良的分子标志,是临床指导靶向HER2治疗的标准。肿瘤细胞中HER2蛋白胞外域经蛋白酶裂解脱落入血,血清中HER2水平改变可以用于监测乳腺癌的进展和治疗疗效。本研究旨在分析血清HER2水平与乳腺癌组织HER2表达状态的相关性,并探讨血清HER2水平与临床病理因素的关系,以评价其潜在的临床应用价值。方法：分别采用ELISA和免疫组化方法检测70例乳腺癌患者血清HER2水平和肿瘤组织HER2表达状态,Spearmen秩相关分析二者的相关性,χ2检验分析血清HER2与临床病理因素的关系。结果：乳腺癌患者血清HER2水平和组织HER2表达呈正相关（r=0．686,P〈0．001）;肿瘤直径大于2cm患者血清HER2水平高于小于等于2cm患者（χ2=9．071,P=0．030）;临床II-III期患者血清HER2水平高于I期患者（χ2=9．001,P=0．030）;ER阴性患者血清HER2水平高于ER阳性患者（χ2=16．307,P〈0．0.001）：PR阴性患者血清HER2水平高于PR阳性患者（χ2=16．164,P〈0．001）,而血清HER2水平在不同患者年龄、组织学分级和淋巴结状态等临床病理因素各组间无统计学差异。结论：乳腺癌患者血清HER2水平可以反应肿瘤组织HER2表达状态,其水平升高提示乳腺癌恶性程度高、预后差,是潜在的乳腺癌预后预测和疗效监测的血清学标志,     

中国人群胰腺癌与胃癌HER2/neu基因表达

  目的  探讨胰腺癌与胃癌组织中HER2/neu基因表达状态及其在治疗与评估临床结局中的作用。  方法  应用免疫组织化学和多色荧光原位杂交技术, 检测北京协和医院手术切除的81例胰腺导管癌及癌旁胰腺组织和100例胃癌及癌旁胃组织标本中HER2/neu蛋白表达及基因状态的变化, 分析HER2/neu蛋白表达与基因状态间的关系及其与胰腺癌和胃癌临床病理改变间的关系。  结果  免疫组织化学显示, 81例胰腺癌组织中9例(11.1%)HER2/neu蛋白表达阳性(2+及3+), 100例胃癌组织中13例(13%)HER2/neu蛋白表达阳性(2+及3+); 荧光原位杂交结果显示, 81例胰腺癌组织中15例(18.5%)HER2/neu基因扩增, 100例胃癌组织中11例(11%)HER2/neu基因扩增。胰腺癌HER2/neu基因扩增与淋巴结转移有显著相关性(P=0.001)。胃癌组织中6例HER2/neu蛋白3+病例均显示HER2/neu基因扩增, 且胃癌组织HER2/neu蛋白表达与其基因扩增有显著相关性(P < 0.0001)。无论是癌旁胰腺组织还是癌旁胃组织均未检测到HER2/neu蛋白表达及基因扩增。  结论  胰腺癌组织HER2/neu蛋白表达与基因扩增不一致, 而胃癌组织HER2/neu蛋白表达与基因扩增有显著相关性。HER2/neu基因异常可能在胰腺癌及胃癌的发生发展中起着重要作用, 对胰腺癌及胃癌患者进行HER2/neu基因状态检测可能对其靶向治疗具有一定的指导意义。     

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。     

血清肿瘤标记物与HER2阳性乳腺癌骨转移的相关性研究

目的观察人类表皮生长因子受体2(HER2)阳性乳腺癌的肿瘤标记物水平与骨转移的相关性。方法收集确诊为HER2阳性浸润性乳腺癌的100例患者,根据有无骨转移分为2组:骨转移组(n=40),未骨转移组(n=60)。采用ELISA法监测患者入院时、随访发生骨转移时血清糖类抗原(CA153)和癌胚抗原(CEA)水平,观察2组患者年龄、病理分型、血清肿瘤标记物和赫赛汀的应用情况等,比较2组患者上述指标的差异。采用受试者工作特征(ROC)曲线预测血清CA153、CEA对HER2阳性乳腺癌骨转移的价值。结果 HER2阳性乳腺癌患者中,骨转移组和未骨转移组入院时血清CEA、CA153水平差异无统计学意义(P0.05),ROC曲线发现血清CEA水平(AUC 0.72,95%CI0.63~0.81,P=0.01)和CA153水平(AUC 0.67,95%CI 0.60~0.77,P=0.03)为预测预测骨转移的因素。其中CA15317.2U/mL预测HER2阳性乳腺癌患者骨转移的敏感度为78.8%,特异度为45.0%;CEA2.64μg/L预测骨转移的敏感度为75.8%,特异度为43.3%。结论血清CA153和CEA水平对HER2阳性乳腺癌的骨转移有一定的预测价值。     

GP和PathVysion HER2试剂盒检测乳腺癌患者HER2基因状态的比较

目的 通过与进口PathVysion HER2试剂盒比较,评价国产金菩嘉GP HER2试剂盒检测乳腺癌患者HER2基因状态的临床应用价值.方法 收集108例乳腺浸润性导管癌(简称"乳腺癌")肿瘤组织标本,分别采用FISH技术与GP HER2试剂盒和PathVysion HER2试剂盒检测乳腺癌患者HER2基因表达水平,比较2种试剂盒检测乳腺癌患者HER2基因表达差异,并评价GP HER2试剂盒检测乳腺癌患者组织标本中HER2基因扩增的敏感度、特异度和准确性.结果 GP HER2试剂盒和PathVysion HER2试剂盒检测乳腺癌患者组织标本中HER2基因扩增率分别为25.0%(27/108)和26.9%(29/108).与PathVysion HER2试剂盒相比,GP HER2试剂盒检测乳腺癌患者组织标本中HER2基因扩增的敏感度、特异度和准确性分别为89.7%(26/29)、98.7%(78/79)和96.3%(104/108),PPV和NPV均为96.3%(26/27,78/81).GP HER2试剂盒检出第17号染色体多倍体的敏感度、特异度和准确性分别为93.3%(14/15)、100%(93/93)和99.1%(107/108).结论 GPHER2试剂盒在检测乳腺癌患者组织标本中HER2基因状态的敏感度和特异度及准确性高,在临床评价乳腺癌HER2基因状态中具有广泛应用价值.     

GP和PathVysion HER2试剂盒检测乳腺癌患者HER2基因状态的比较

目的 通过与进口PathVysion HER2试剂盒比较,评价国产金菩嘉GP HER2试剂盒检测乳腺癌患者HER2基因状态的临床应用价值.方法 收集108例乳腺浸润性导管癌(简称"乳腺癌")肿瘤组织标本,分别采用FISH技术与GP HER2试剂盒和PathVysion HER2试剂盒检测乳腺癌患者HER2基因表达水平,比较2种试剂盒检测乳腺癌患者HER2基因表达差异,并评价GP HER2试剂盒检测乳腺癌患者组织标本中HER2基因扩增的敏感度、特异度和准确性.结果 GP HER2试剂盒和PathVysion HER2试剂盒检测乳腺癌患者组织标本中HER2基因扩增率分别为25.0%(27/108)和26.9%(29/108).与PathVysion HER2试剂盒相比,GP HER2试剂盒检测乳腺癌患者组织标本中HER2基因扩增的敏感度、特异度和准确性分别为89.7%(26/29)、98.7%(78/79)和96.3%(104/108),PPV和NPV均为96.3%(26/27,78/81).GP HER2试剂盒检出第17号染色体多倍体的敏感度、特异度和准确性分别为93.3%(14/15)、100%(93/93)和99.1%(107/108).结论 GPHER2试剂盒在检测乳腺癌患者组织标本中HER2基因状态的敏感度和特异度及准确性高,在临床评价乳腺癌HER2基因状态中具有广泛应用价值.

Abstract：

Objective To evaluate clinical application of Jin Pujia GP HER2 probe kit in testing HER2 gene status of breast cancer through comparing it with PathVysion HER2 probe kit. Methods HER2 gene status were detected from 108 cases with invasive ductal breast cancer using GP and PathVysion HER2 probe kits by FISH. HER2 gene expression levels were measured by GP and PathVysion HER2 probe kits, and the sensitivity, the specificity and the accuracy of GP HER2 probe kit were evaluated. Results HER2 gene amplification positive rates detected by GP HER2 probe kit and PathVysion HER2 probe kit were 25.0%(27/108) and 26.9% (29/108), respectively. As compared with PathVysion HER2 probe kit, the sensitivity, the specificity and the accuracy of the GP HER2 kit were 89. 7% (26/29), 98.7% (78/79)and 96. 3% ( 104/108), respectively, whereas the PPV and NPV were 96. 3% (26/27) and 96. 3% (78/81), respectively. The GP HER2 probe kit had a sensitivity of 93.3% ( 14/15), a specificity of 100%(93/93) and an accuracy of 99. 1% (107/108) for detecting polysomy 17. Conclusion GP HER2 probe kit has high sensitivity and specificity for detecting HER2 gene status in breast cancer patients, and it has clinical application value.     

GP和PathVysion HER2试剂盒检测乳腺癌患者HER2基因状态的比较

目的 通过与进口PathVysion HER2试剂盒比较,评价国产金菩嘉GP HER2试剂盒检测乳腺癌患者HER2基因状态的临床应用价值.方法 收集108例乳腺浸润性导管癌(简称"乳腺癌")肿瘤组织标本,分别采用FISH技术与GP HER2试剂盒和PathVysion HER2试剂盒检测乳腺癌患者HER2基因表达水平,比较2种试剂盒检测乳腺癌患者HER2基因表达差异,并评价GP HER2试剂盒检测乳腺癌患者组织标本中HER2基因扩增的敏感度、特异度和准确性.结果 GP HER2试剂盒和PathVysion HER2试剂盒检测乳腺癌患者组织标本中HER2基因扩增率分别为25.0%(27/108)和26.9%(29/108).与PathVysion HER2试剂盒相比,GP HER2试剂盒检测乳腺癌患者组织标本中HER2基因扩增的敏感度、特异度和准确性分别为89.7%(26/29)、98.7%(78/79)和96.3%(104/108),PPV和NPV均为96.3%(26/27,78/81).GP HER2试剂盒检出第17号染色体多倍体的敏感度、特异度和准确性分别为93.3%(14/15)、100%(93/93)和99.1%(107/108).结论 GPHER2试剂盒在检测乳腺癌患者组织标本中HER2基因状态的敏感度和特异度及准确性高,在临床评价乳腺癌HER2基因状态中具有广泛应用价值.     

PI3K pathway mutations and PTEN levels in primary and metastatic breast cancer

The purpose of this work was to determine whether there are differences in PIK3CA mutation status and PTEN protein expression between primary and matched metastatic breast tumors as this could influence patient management. Paraffin sections of 50 μm were used for DNA extraction and slides of 3 μm for immunohistochemistry (IHC) and FISH. Estrogen receptor, progesterone receptor, and HER2 IHC were repeated in a central laboratory for both primary tumors and metastases. PTEN levels were assessed by IHC and phosphoinositide 3-kinase (PI3K) pathway mutations were detected by a mass spectroscopy-based approach. Median age was 48 years (range: 30-83 years). Tumor subtype included 72% hormone receptor positive/HER2 negative, 20% HER2-positive, and less than 7.8% triple receptor negative. Tissues were available for PTEN IHC in 46 primary tumors and 52 metastases. PTEN was lost in 14 (30%) primary tumors and 13 (25%) metastases. There were five cases of PTEN loss and eight cases of PTEN gain from primary tumors to metastases (26% discordance). Adequate DNA was obtained from 46 primary tumors and from 50 metastases for PIK3CA analysis. PIK3CA mutations were detected in 19 (40%) of primary tumors and 21 (42%) of metastases. There were five cases of PIK3CA mutation loss and four cases of mutation gain (18% discordance). There was an increase of the level of PIK3CA mutations in four cases and decrease in one case from primary tumors to metastases. There is a high level of discordance in PTEN level, PIK3CA mutations, and receptor status between primary tumors and metastases that may influence patient selection and response to PI3K-targeted therapies.