HDTD: analyzing multi-tissue gene expression data

Anestis Touloumis, John C. Marioni, Simon Tavaré

Research output: Contribution to journalArticle

Abstract

By collecting multiple samples per subject, researchers can characterize intra-subject variation using physiologically relevant measurements such as gene expression profiling. This can yield important insights into fundamental biological questions ranging from cell type identity to tumour development. For each subject, the data measurements can be written as a matrix with the different subsamples (e.g. multiple tissues) indexing the columns and the genes indexing the rows. In this context, neither the genes nor the tissues are expected to be independent and straightforward application of traditional statistical methods that ignore this two-way dependence might lead to erroneous conclusions. Herein, we present a suite of tools embedded within the R/Bioconductor packageHDTDfor robustly estimating and performing hypothesis tests about the mean relationship and the covariance structure within the rows and columns. We illustrate the utility ofHDTDby applying it to analyze data generated by the Genotype-Tissue Expression consortium.
Original languageEnglish
JournalBioinformatics
DOIs
Publication statusPublished - 7 Jun 2016

Bibliographical note

© The Author 2016. Published by Oxford University Press. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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