A single-sample microarray normalization method to facilitate personalized-medicine workflows.

A single-sample microarray normalization method to facilitate personalized-medicine workflows.
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DOI:
10.1016/j.ygeno.2012.08.003
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发表时间:
2012-12
期刊:
影响因子:
4.4
通讯作者:
Johnson, W. Evan
Johnson, W. Evan
中科院分区:
生物学3区
文献类型:
--
作者:
Piccolo, Stephen R.;Sun, Ying;Campbell, Joshua D.;Lenburg, Marc E.;Bild, Andrea H.;Johnson, W. Evan

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基因表达微阵列使研究人员能够以高通量的方式表征生物现象,但在样品收集和处理过程中会出现技术偏差和不可避免的变化。标准化技术旨在纠正这种偏差。大多数现有的方法需要多个样本进行处理的聚合,因此,每个样本的输出是由其他共同处理的样本的影响。然而,在个性化医疗工作流程中,样本可能连续到达,因此在每次新到达时重新规范所有样本将是不切实际的。我们开发了单通道阵列标准化(SCAN),这是一种单样本技术,可以模拟探针核苷酸组成对荧光强度的影响并纠正此类影响,从而显着提高单个样本内的信噪比,同时减少样本间的差异。在各种基准比较中,我们表明,SCAN执行以及或优于竞争的方法,但不依赖于外部参考样品,可以应用于任何单通道微阵列平台。
Gene-expression microarrays allow researchers to characterize biological phenomena in a high-throughput fashion but are subject to technological biases and inevitable variabilities that arise during sample collection and processing. Normalization techniques aim to correct such biases. Most existing methods require multiple samples to be processed in aggregate; consequently, each sample's output is influenced by other samples processed jointly. However, in personalized-medicine workflows, samples may arrive serially, so renormalizing all samples upon each new arrival would be impractical. We have developed Single Channel Array Normalization (SCAN), a single-sample technique that models the effects of probe-nucleotide composition on fluorescence intensity and corrects for such effects, dramatically increasing the signal-to-noise ratio within individual samples while decreasing variation across samples. In various benchmark comparisons, we show that SCAN performs as well as or better than competing methods yet has no dependence on external reference samples and can be applied to any single-channel microarray platform.
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通讯作者: Thomson, E.