Abstract
We have developed a statistical regression modeling approach to discover genes that are differentially expressed between two predefined sample groups in DNA microarray experiments. Our model is based on well-defined assumptions, uses rigorous and well-characterized statistical measures, and accounts for the heterogeneity and genomic complexity of the data. In contrast to cluster analysis, which attempts to define groups of genes and/or samples that share common overall expression profiles, our modeling approach uses known sample group membership to focus on expression profiles of individual genes in a sensitive and robust manner. Further, this approach can be used to test statistical hypotheses about gene expression. To demonstrate this methodology, we compared the expression profiles of 11 acute myeloid leukemia (AML) and 27 acute lymphoblastic leukemia (ALL) samples from a previous study (Golub et al. 1999) and found 141 genes differentially expressed between AML and ALL with a 1% significance at the genomic level. Using this modeling approach to compare different sample groups within the AML samples, we identified a group of genes whose expression profiles correlated with that of thrombopoietin and found that genes whose expression associated with AML treatment outcome lie in recurrent chromosomal locations. Our results are compared with those obtained using t-tests or Wilcoxon rank sum statistics.
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Dates
Type | When |
---|---|
Created | 23 years ago (July 26, 2002, 8 p.m.) |
Deposited | 3 years, 9 months ago (Nov. 18, 2021, 2:04 p.m.) |
Indexed | 1 month, 1 week ago (July 14, 2025, 11:19 p.m.) |
Issued | 24 years, 1 month ago (July 1, 2001) |
Published | 24 years, 1 month ago (July 1, 2001) |
Published Online | 24 years, 1 month ago (July 1, 2001) |
Published Print | 24 years, 1 month ago (July 1, 2001) |
@article{Thomas_2001, title={An Efficient and Robust Statistical Modeling Approach to Discover Differentially Expressed Genes Using Genomic Expression Profiles}, volume={11}, ISSN={1549-5469}, url={http://dx.doi.org/10.1101/gr.165101}, DOI={10.1101/gr.165101}, number={7}, journal={Genome Research}, publisher={Cold Spring Harbor Laboratory}, author={Thomas, Jeffrey G. and Olson, James M. and Tapscott, Stephen J. and Zhao, Lue Ping}, year={2001}, month=jul, pages={1227–1236} }