Normalization of RNA-seq data using factor analysis of control genes or samples.
Normalization of RNA-seq data using factor analysis of control genes or samples.
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DOI:
10.1038/nbt.2931
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发表时间:
2014-09
影响因子:
46.9
通讯作者:
Dudoit, Sandrine
中科院分区:
文献类型:
--
作者:
Risso, Davide;Ngai, John;Speed, Terence P.;Dudoit, Sandrine
Normalization of RNA-seq data has proven essential to ensure accurate inference of expression levels. Here we show that usual normalization approaches mostly account for sequencing depth and fail to correct for library preparation and other more-complex unwanted effects. We evaluate the performance of the External RNA Control Consortium (ERCC) spike-in controls and investigate the possibility of using them directly for normalization. We show that the spike-ins are not reliable enough to be used in standard global-scaling or regression-based normalization procedures. We propose a normalization strategy, remove unwanted variation (RUV), that adjusts for nuisance technical effects by performing factor analysis on suitable sets of control genes (e.g., ERCC spike-ins) or samples (e.g., replicate libraries). Our approach leads to more-accurate estimates of expression fold-changes and tests of differential expression compared to state-of-the-art normalization methods. In particular, RUV promises to be valuable for large collaborative projects involving multiple labs, technicians, and/or platforms.
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DOI:
10.1093/biostatistics/kxr054
发表时间:
2012-04
期刊:
Biostatistics (Oxford, England)
影响因子:
--
作者:
Hansen KD;Irizarry RA;Wu Z
通讯作者:
Wu Z
影响因子:
12.3
作者:
Robinson MD;Oshlack A
通讯作者:
Oshlack A
影响因子:
46.9
作者:
Canales, Roger D.;Luo, Yuling;Goodsaid, Federico M.
通讯作者:
Goodsaid, Federico M.
影响因子:
5.8
作者:
Sun, Zhaonan;Zhu, Yu
通讯作者:
Zhu, Yu
影响因子:
3
作者:
Risso D;Schwartz K;Sherlock G;Dudoit S
通讯作者:
Dudoit S