Empirical bayes analysis of a microarray experiment

Bradley Efron, Robert Tibshirani, John D. Storey, Virginia Tusher

Research output: Contribution to journalArticle

1048 Scopus citations

Abstract

Microarrays are a novel technology that facilitates the simultaneous measurement of thousands of gene expression levels. A typical microarray experiment can produce millions of data points, raising serious problems of data reduction, and simultaneous inference. We consider one such experiment in which oligonucleotide arrays were employed to assess the genetic effects of ionizing radiation on seven thousand human genes. A simple nonparametric empirical Bayes model is introduced, which is used to guide the efficient reduction of the data to a single summary statistic per gene, and also to make simultaneous inferences concerning which genes were affected by the radiation. Although our focus is on one specific experiment, the proposed methods can be applied quite generally. The empirical Bayes inferences are closely related to the frequentist false discovery rate (FDR) criterion.

Original languageEnglish (US)
Pages (from-to)1151-1160
Number of pages10
JournalJournal of the American Statistical Association
Volume96
Issue number456
DOIs
StatePublished - Dec 1 2001

All Science Journal Classification (ASJC) codes

  • Statistics and Probability
  • Statistics, Probability and Uncertainty

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