Single sample pathway analysis in metabolomics: performance evaluation and application.
Single sample pathway analysis in metabolomics: performance evaluation and application.
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DOI:
10.1186/s12859-022-05005-1
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发表时间:
2022-11-14
影响因子:
3
通讯作者:
Ebbels, Timothy M. D.
中科院分区:
文献类型:
--
作者:
Wieder, Cecilia;Lai, Rachel P. J.;Ebbels, Timothy M. D.
关键词:
Single sample pathway analysis (ssPA) transforms molecular level omics data to the pathway level, enabling the discovery of patient-specific pathway signatures. Compared to conventional pathway analysis, ssPA overcomes the limitations by enabling multi-group comparisons, alongside facilitating numerous downstream analyses such as pathway-based machine learning. While in transcriptomics ssPA is a widely used technique, there is little literature evaluating its suitability for metabolomics. Here we provide a benchmark of established ssPA methods (ssGSEA, GSVA, SVD (PLAGE), and z-score) alongside the evaluation of two novel methods we propose: ssClustPA and kPCA, using semi-synthetic metabolomics data. We then demonstrate how ssPA can facilitate pathway-based interpretation of metabolomics data by performing a case-study on inflammatory bowel disease mass spectrometry data, using clustering to determine subtype-specific pathway signatures. While GSEA-based and z-score methods outperformed the others in terms of recall, clustering/dimensionality reduction-based methods provided higher precision at moderate-to-high effect sizes. A case study applying ssPA to inflammatory bowel disease data demonstrates how these methods yield a much richer depth of interpretation than conventional approaches, for example by clustering pathway scores to visualise a pathway-based patient subtype-specific correlation network. We also developed the sspa python package (freely available at https://pypi.org/project/sspa/), providing implementations of all the methods benchmarked in this study. This work underscores the value ssPA methods can add to metabolomic studies and provides a useful reference for those wishing to apply ssPA methods to metabolomics data. The online version contains supplementary material available at 10.1186/s12859-022-05005-1.
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影响因子:
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通讯作者:
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Abdel Hadi L;Di Vito C;Riboni L
通讯作者:
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影响因子:
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Jewison T;Su Y;Disfany FM;Liang Y;Knox C;Maciejewski A;Poelzer J;Huynh J;Zhou Y;Arndt D;Djoumbou Y;Liu Y;Deng L;Guo AC;Han B;Pon A;Wilson M;Rafatnia S;Liu P;Wishart DS
通讯作者:
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