國家衛生研究院 NHRI:Item 3990099045/9189
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 12145/12927 (94%)
造访人次 : 855745      在线人数 : 1373
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧：
  • 您可在西文检索词汇前后加上"双引号"，以获取较精准的检索结果
  • 若欲以作者姓名搜寻，建议至进阶搜寻限定作者字段，可获得较完整数据
    •  进阶搜寻
    主页 ‧ 登入 ‧ 上传 ‧ 说明 ‧ 关于NHRI ‧ 管理 到手机版


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.nhri.org.tw/handle/3990099045/9189


    题名: HER2 testing in breast cancer by quantitative PCR: Technical and clinical considerations
    作者: Yu, R;Chen, WC;Chiu, KY;Lu, S;Liu, YC;Ko, HY;Wu, HC;Hsieh, WC;Lee, ZJ;Zhang, P;Shi, LL;Liu, M;Chang, KC;Su, IJ;Su, P;Yeh, YM
    贡献者: Division of Infectious Diseases
    摘要: Background: HER2 gene is amplified and/or overexpressed in approximate 15% to 20% of primary breast cancers. Knowing the HER2 status is therefore essential for making right decision. Quantitative PCR is originally designed for analyzing gene expression, and now is gaining wide use in molecular diagnostics. We made some key changes to the steps and streamlined the whole process to provide a convenient method for determining the HER2expression level in breast cancer patients. Methods: A total of 80 freshly-frozen or FFPE breast tumor samples, with a minimal of 30% tumor cell content, were collected from three different locations. Total RNA was extracted by a dual process and was adjusted to a concentration of 25 ng/ml. The same amount of RNA from each sample was analyzed by RT-PCR. Result was reported automatically as delta Ct (ΔCt) respect to a cutoff reference point (CRP), which was derived from a tumor HER2 mRNA population study and monitored in each assay with a traceable material, synthetic oligo. The ΔCtvalue then was used for determination of HER2 expression level. Results: We simplified quantitative PCR steps and optimized assay process by incorporating a self quality control mechanism. Our studies demonstrated that the improved method had a linear range up to 7-order magnitude with less than 8% intra- and inter-assay variance. We established criteria for using total RNA as assay normalizer; therefore, eliminated the needs for choosing a particular reference gene. We introduced a new scoring system based on a CRP, which produced consistent/comparable scoring results on different PCR machines and in different laboratories. A comparison study with FISH revealed an overall 90% agreement. Our method was also suitable for HER2 testing in blood samples, making it feasible to track patient HER2level after clinical intervention. Conclusions: HER2 testing by quantitative PCR method is accurate, consistent, and cost-effective. The whole process can be accomplished in less than 3 hours. The improved method also circumvents many drawbacks associated with testing by IHC and FISH. It is beyond doubt that adoption of quantitative PCR represents a new trend in HER2 testing and would improve clinical outcomes.
    日期: 2015-05
    關聯: Journal of Clinical Oncology. 2015 May;33(15, Suppl.):e11619.
    Link to: http://meeting.ascopubs.org/cgi/content/abstract/33/15_suppl/e11619
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0732-183X&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000358036902229
    显示于类别:[蘇益仁(2002-2015)] 會議論文/會議摘要

    文件中的档案:

    档案 描述 大小格式浏览次数
    ISI000358036902229.pdf58KbAdobe PDF531检视/开启


    在NHRI中所有的数据项都受到原著作权保护.

    TAIR相关文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈