Significance analysis of time course microarray experiments

  • John D. Storey
    Department of Biostatistics, University of Washington, Seattle, WA 98195; Stanford Genome Technology Center and Department of Biochemistry, Stanford University, Palo Alto, CA 94304; and Department of Surgery, Shriners Burn Center and Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114
  • Wenzhong Xiao
    Department of Biostatistics, University of Washington, Seattle, WA 98195; Stanford Genome Technology Center and Department of Biochemistry, Stanford University, Palo Alto, CA 94304; and Department of Surgery, Shriners Burn Center and Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114
  • Jeffrey T. Leek
    Department of Biostatistics, University of Washington, Seattle, WA 98195; Stanford Genome Technology Center and Department of Biochemistry, Stanford University, Palo Alto, CA 94304; and Department of Surgery, Shriners Burn Center and Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114
  • Ronald G. Tompkins
    Department of Biostatistics, University of Washington, Seattle, WA 98195; Stanford Genome Technology Center and Department of Biochemistry, Stanford University, Palo Alto, CA 94304; and Department of Surgery, Shriners Burn Center and Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114
  • Ronald W. Davis
    Department of Biostatistics, University of Washington, Seattle, WA 98195; Stanford Genome Technology Center and Department of Biochemistry, Stanford University, Palo Alto, CA 94304; and Department of Surgery, Shriners Burn Center and Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114

書誌事項

公開日
2005-09-02
DOI
  • 10.1073/pnas.0504609102
公開者
Proceedings of the National Academy of Sciences

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説明

<jats:p>Characterizing the genome-wide dynamic regulation of gene expression is important and will be of much interest in the future. However, there is currently no established method for identifying differentially expressed genes in a time course study. Here we propose a significance method for analyzing time course microarray studies that can be applied to the typical types of comparisons and sampling schemes. This method is applied to two studies on humans. In one study, genes are identified that show differential expression over time in response to<jats:italic>in vivo</jats:italic>endotoxin administration. By using our method, 7,409 genes are called significant at a 1% false-discovery rate level, whereas several existing approaches fail to identify any genes. In another study, 417 genes are identified at a 10% false-discovery rate level that show expression changing with age in the kidney cortex. Here it is also shown that as many as 47% of the genes change with age in a manner more complex than simple exponential growth or decay. The methodology proposed here has been implemented in the freely distributed and open-source<jats:sc>edge</jats:sc>software package.</jats:p>

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