Detection of alternative lengthening of telomeres by telomere quantitative PCR.

Detection of alternative lengthening of telomeres by telomere quantitative PCR.
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DOI:
10.1093/nar/gks781
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发表时间:
2013-01
影响因子:
14.9
通讯作者:
Reddel RR
Reddel RR
中科院分区:
生物学2区
文献类型:
--
作者:
Lau LM;Dagg RA;Henson JD;Au AY;Royds JA;Reddel RR

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端粒交替延长(ALT)是两种已知的端粒长度维持机制之一,对于癌细胞的无限增殖潜力是必不可少的。现有的检测肿瘤中ALT的方法需要大量的肿瘤材料,且劳动强度大,因此很难研究ALT在大肿瘤队列中的患病率和预后意义。在这里,我们提出了一个新的策略,利用端粒定量聚合酶链式反应来诊断ALT。该方法比传统方法更快速,同时仔细检查ALT细胞的两个明显特征:长端粒和C-环(部分双链端粒C-链DNA环)的存在。该方案只需要30 ng基因组DNA,将促进对肿瘤中ALT的大规模研究,并可很容易地被临床实验室采用。
Alternative lengthening of telomeres (ALT) is one of the two known telomere length maintenance mechanisms that are essential for the unlimited proliferation potential of cancer cells. Existing methods for detecting ALT in tumors require substantial amounts of tumor material and are labor intensive, making it difficult to study prevalence and prognostic significance of ALT in large tumor cohorts. Here, we present a novel strategy utilizing telomere quantitative PCR to diagnose ALT. The protocol is more rapid than conventional methods and scrutinizes two distinct characteristics of ALT cells concurrently: long telomeres and the presence of C-circles (partially double-stranded circles of telomeric C-strand DNA). Requiring only 30 ng of genomic DNA, this protocol will facilitate large-scale studies of ALT in tumors and can be readily adopted by clinical laboratories.
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发表时间: 2009-02
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