Single monochrome real-time RT-PCR assay for identification, quantification, and breakpoint cluster region determination of t(9;22) transcripts.

Single monochrome real-time RT-PCR assay for identification, quantification, and breakpoint cluster region determination of t(9;22) transcripts.
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用于 t(9;22) 转录物的鉴定、定量和断点簇区域测定的单一单色实时 RT-PCR 测定。

DOI:
10.1016/s1525-1578(10)60007-4
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发表时间:
2005
期刊:
The Journal of molecular diagnostics : JMD
影响因子:
--
通讯作者:
K. Bhatia
K. Bhatia
中科院分区:
--
文献类型:
--
作者:
M. Gutiérrez;G. Timson;A. K. Siraj;Rong Bu;Shakuntala A. Barbhaya;S. Banavali;K. Bhatia

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t(9;22)产生BCR-ABL融合基因,这是慢性髓性白血病(CML)的标志,但也存在于急性淋巴细胞白血病(ALL)中。多个嵌合转录物翻译成190或210 kd的蛋白质,很少翻译成230 kd的蛋白质。CML通常携带p210 BCR-ABL,而ALL最常携带p190。这些融合转录物的检测和定量在临床管理中是有用的。我们利用这些转录本独特的熔融谱设计了一种新的、简单的、具有成本效益的基于单色多重实时RT-PCR的检测方法,用于鉴定和定量这些转录本(b3-a2、b2-a2和e1-a2),而无需进一步操作。该检测对e1-a2的灵敏度为10−4,对b3-a2/b2-a2的灵敏度为10−5,适用于微小残留病(MRD)的检测。测定间和测定内的变异最小。我们应用该方法评估了印度260例ALL儿童样本中p190和p210的分布。19例(7.3%)检测到BCR-ABL,包括1例T-ALL。8例(3.1%)患者表现为mBCR-ABL (p190), 11例(4.2%)患者表现为mBCR-ABL (p210)。转录物水平差异显著(最高可达3000倍),但e1-a2的表达水平普遍高于b3/b2-a2 (P = 0.05)。因此,这种简单的实时多重检测可以很容易地用于监测ALL和CML患者。
t(9;22) generates the BCR-ABL fusion gene, the hallmark of chronic myeloid leukemia (CML) but also found in acute lymphoblastic leukemia (ALL). Multiple chimeric transcripts translate to proteins of 190 or 210 kd and, rarely, 230 kd. CML typically carries p210 BCR-ABL while ALL is most often associated with p190. Detection and quantification of these fusion transcripts is useful in clinical management. We have exploited the unique melting profiles of these transcripts to design a new, simple, and cost-effective assay based on monochrome multiplex real-time RT-PCR for identification and quantification of each of these transcripts (b3-a2, b2-a2, and e1-a2) without further manipulation. The sensitivity of this assay was 10−4for e1-a2 and 10−5for b3-a2/b2-a2, which is appropriate for detection of minimal residual disease (MRD). Inter- and intra-assay variation was minimal. We applied this assay to assess the distribution of p190 and p210 in 260 childhood ALL samples from India. BCR-ABL was detected in 19 (7.3%), including one T-ALL. Eight patients (3.1%) demonstrated mBCR-ABL (p190) and 11 (4.2%) had MBCR-ABL (p210). Transcript levels varied markedly (up to 3000-fold) but e1-a2 were generally expressed at higher levels than b3/b2-a2 (P = 0.05). This simple real-time multiplex assay can thus be easily applied to monitor patients with ALL as well as CML.
临床实验室使用的实时定量 bcr-abl 测定的全面验证。
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发表时间: 2003
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影响因子: --
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