therascreen NRAS Pyro Kit

基于测序的方法定量检测NRAS基因中癌症相关的突变

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therascreen NRAS Pyro Kit (24)

Cat. No. / ID:  971530

For 24 reactions: Sequencing Primers, PCR Primers, Unmethylated Control DNA, PyroMark PCR Master Mix, CoralLoad Concentrate, and therascreen Buffers and Reagents
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therascreen NRAS Pyro Kit用于体外诊断。

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Features

  • 符合欧洲体外诊断98/79/EC指令
  • 实时获得多个结果
  • 准确定量NRAS基因中的突变
  • 简单说明复杂的序列信息

Product Details

therascreen NRAS Pyro Kit是用于鉴定NRAS基因突变和缺失的分子检测试剂盒。该试剂盒包含扩增NRAS基因所需的引物和试剂,以及在PyroMark Q24实时定量焦磷酸序列分析仪上使用焦磷酸测序技术实时定量检测突变所需的缓冲液、引物和试剂。

Performance

线性

将载有编码子12和13 GGT->GAT和编码子61 CAA->CGA的突变的质粒和野生型基因的质粒混合测量其线性(参见"Linearity of GGT->GAT mutation")。这些质粒以四种不同的突变质粒比例(5、10、30、50%)混合。每种质粒混合物用三种不同量的therascreen NRAS Pyro Kit使用焦磷酸测序技术进行分析,重复分析三次。

检测5–50%突变范围时,含有5%的容许非线性度的结果是线性的。检测编码子13 GGT->GAT和编码子61 CAA->CGA的突变获得同样的结果。

精密度

精密度用于检测这些试验的总的差异,对如上所述的质粒混合物进行三个不同水平的分析,每个混合物重复测量三次以获得精密度数据。

重复性(批内和批间差)基于线性测定数据计算得出(用不同的therascreen NRAS Pyro Kit在同一天测定三次)。中间精密度(实验室内部差异)由同一实验室三次检测得出,这三次检测分别由不同的操作者用不同的PyroMark Q24实时定量焦磷酸序列分析仪以及不同的therascreen NRAS Pyro Kit在不同的三天进行。重现性(实验室之间的差异)由使用不同的therascreen NRAS Pyro Kit在两个不同的实验室分别进行检测得出。

在5–50%的突变测量范围内,编码子12 GGT>GAT的突变检测的重复性、中间精密度和重现性分别为1.2–1.9%、1.0–2.0%、1.3–3.1%。检测编码子13 GGT->GAT和编码子61 CAA->CGA的突变获得同样的结果。

编码子12 GGT>GAT的突变精密度
% 突变质粒重复性(SD)中间精密度(SD)重现性(SD)
7.5, 1.27.3, 1.06.7, 1.3
1014.6, 1.313.5, 1.113.7, 1.3
3037.8, 1.937.9, 1.536.1, 2.9
5059.8, 1.760.4, 2.057.5, 3.1
所有值以%为单位。突变质粒所占百分比(%)通过测量OD260确定。SD:标准偏差(重复性和中间精密度:n=9;重现性:n=12)。

Principle

therascreen NRAS Pyro Kit用于实时定量检测人NRAS基因编码子12、13和61的突变,在PyroMark Q24实时定量焦磷酸序列分析仪上使用焦磷酸测序技术检测。NRAS基因编码一种GTPase,该酶是成神经细胞瘤RAS病毒(v-ras)原癌基因同源物。 在所有恶性黑素瘤中,有将近13–25%发生NRAS基因突变,通常在编码子12、13和61突变。这些突变激活了NRAS信号通路。 

可检测以下种类的突变:

  • 编码子12/13:G12A、G12C、G12D、G12R、G12S、G12V、G13A、G13C、G13D、G13R、G13S和G13V
  • 编码子61:Q61E、Q61H、Q61K、Q61L、Q61P和Q61R

Procedure

该试剂盒包含2部分实验:一个用于检测编码子12和13的突变;另一个用于检测编码子61的突变(参见"Illustration of the NRAS assay"和"Pyrogram trace of a normal genotype in codon 12-13")。运用PCR技术对这两个片段分别进行扩增,测定特定区域的核酸序列。使用该法进行定量和定性分析时,特定区域周围的核酸序列峰被视为标准峰和参照峰。

使用针对编码子12/13和编码子61的引物对两个片段PCR扩增后,将扩增子固定在高性能链霉素亲和琼脂糖上。将单链DNA和相应序列的引物退火处理得到DNA。然后在PyroMark Q24实时定量焦磷酸序列分析仪上设置程序和运行程序对样品进行分析。运行后可以通过调节"Sequence to Analyze"来检测稀有突变(参见"Pyrogram trace of a GGT to AGT mutation in base 1 of codon 12"和"Pyrogram trace after reanalysis of the sample in the previous figure")。

Applications

therascreen NRAS Pyro Kit用于定量检测人NRAS基因编码子12、13和61的突变。该试剂盒用于辅助鉴定癌症,然后采用特异性作用于NRAS基因或NRAS基因起关键作用的信号通路的治疗方法进行治疗。

可检测以下种类的突变:

  • 编码子12/13:G12A、G12C、G12D、G12R、G12S、G12V、G13A、G13C、G13D、G13R、G13S和G13V
  • 编码子61:Q61E、Q61H、Q61K、Q61L、Q61P和Q61R

Supporting data and figures

Resources

安全数据表 (1)
Download Safety Data Sheets for QIAGEN product components.
分析软件 (1)
RAS Extension Plug-in 1.3
SOFTWARE (1MB)
Version 1.3.0.7
For use with PyroMark Q24 Software version 2.0.8
Certificates of Analysis (1)
Safety Data Sheets (1)
Download Safety Data Sheets for QIAGEN product components.
Analysis Software (1)
RAS Extension Plug-in 1.3
SOFTWARE (1MB)
Version 1.3.0.7
For use with PyroMark Q24 Software version 2.0.8

FAQ

Can I use more than 10ng DNA for the PCR reaction for my therascreen Pyro Kits?
It is not recommended to use more than 10ng for the PCR reaction in the therascreen BRAF, therascreen EGFR, therascreen KRAStherascreen NRAS Pyro, and therascreen UGT1A1 Kits.  Too much DNA can sometimes lead to inhibition problems in the PCR reaction.
FAQ ID -2385
Why does the A peak reduction factor have to de set to 0.86 for the codon 61 assay in the therascreen NRAS Pyro Kit?
Quantification of mutations in the codon 61 assay involves a homopolymeric A peak. Testing has shown that the quantification is more accurate if the factor is decreased to 0.86.
FAQ ID -2390
Which purification kits are recommended for the therascreen Pyro kits?

 

Which purification kits are recommended for the therascreen Pyro kits?

 

FAQ ID -2386
Can PyroMark Gold reagents be vortexed?
Reconstiuted enzyme and substrate of PyroMark Gold Reagents, should not be vortexed since this could lead to conformational changes which affect the activity.
FAQ ID -2844
What plug-ins are available for the therascreen Pyro kits?

Plug-Ins are available for:


These plug-ins are available for download on the respective catalog page under the Product Resources tab in the Analysis Software section. Note: PyroMark Q24 software version 2.0.7 is needed for the usage of the Plug-ins. 

 

FAQ ID -2387