Statistical inference from multiple iTRAQ experiments without using common reference standards.
Statistical inference from multiple iTRAQ experiments without using common reference standards.
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DOI:
10.1021/pr300624g
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发表时间:
2013-02-01
影响因子:
4.4
通讯作者:
Ruczinski I
中科院分区:
文献类型:
--
作者:
Herbrich SM;Cole RN;West KP Jr;Schulze K;Yager JD;Groopman JD;Christian P;Wu L;O'Meally RN;May DH;McIntosh MW;Ruczinski I
Isobaric tags for relative and absolute quantitation (iTRAQ) is a prominent mass spectrometry technology for protein identification and quantification that is capable of analyzing multiple samples in a single experiment. Frequently, iTRAQ experiments are carried out using an aliquot from a pool of all samples, or “masterpool”, in one of the channels as a reference sample standard to estimate protein relative abundances in the biological samples and to combine abundance estimates from multiple experiments. In this manuscript, we show that using a masterpool is counterproductive. We obtain more precise estimates of protein relative abundance by using the available biological data instead of the masterpool and do not need to occupy a channel that could otherwise be used for another biological sample. In addition, we introduce a simple statistical method to associate proteomic data from multiple iTRAQ experiments with a numeric response and show that this approach is more powerful than the conventionally employed masterpool-based approach. We illustrate our methods using data from four replicate iTRAQ experiments on aliquots of the same pool of plasma samples and from a 406-sample project designed to identify plasma proteins that covary with nutrient concentrations in chronically undernourished children from South Asia.
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影响因子:
3
作者:
Schwacke JH;Hill EG;Krug EL;Comte-Walters S;Schey KL
通讯作者:
Schey KL
影响因子:
3.4
作者:
Aggarwal, K;Choe, LH;Lee, KH
通讯作者:
Lee, KH
DOI:
10.1073/pnas.091062498
发表时间:
2001-04-24
影响因子:
11.1
作者:
Tusher, VG;Tibshirani, R;Chu, G
通讯作者:
Chu, G
影响因子:
7
作者:
Ross, PL;Huang, YLN;Pappin, DJ
通讯作者:
Pappin, DJ
影响因子:
4.4
作者:
Gan, Chee Sian;Chong, Poh Kuan;Wright, Phillip C.
通讯作者:
Wright, Phillip C.