Robust test method for time-course microarray experiments
<p>Abstract</p> <p>Background</p> <p>In a time-course microarray experiment, the expression level for each gene is observed across a number of time-points in order to characterize the temporal trajectories of the gene-expression profiles. For many of these experiments,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2010-07-01
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| Series: | BMC Bioinformatics |
| Online Access: | http://www.biomedcentral.com/1471-2105/11/391 |
| _version_ | 1828419119229173760 |
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| author | George Stephen L Owzar Kouros Sohn Insuk Kim Sujong Jung Sin-Ho |
| author_facet | George Stephen L Owzar Kouros Sohn Insuk Kim Sujong Jung Sin-Ho |
| author_sort | George Stephen L |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>In a time-course microarray experiment, the expression level for each gene is observed across a number of time-points in order to characterize the temporal trajectories of the gene-expression profiles. For many of these experiments, the scientific aim is the identification of genes for which the trajectories depend on an experimental or phenotypic factor. There is an extensive recent body of literature on statistical methodology for addressing this analytical problem. Most of the existing methods are based on estimating the time-course trajectories using parametric or non-parametric mean regression methods. The sensitivity of these regression methods to outliers, an issue that is well documented in the statistical literature, should be of concern when analyzing microarray data.</p> <p>Results</p> <p>In this paper, we propose a robust testing method for identifying genes whose expression time profiles depend on a factor. Furthermore, we propose a multiple testing procedure to adjust for multiplicity.</p> <p>Conclusions</p> <p>Through an extensive simulation study, we will illustrate the performance of our method. Finally, we will report the results from applying our method to a case study and discussing potential extensions.</p> |
| first_indexed | 2024-12-10T14:47:10Z |
| format | Article |
| id | doaj.art-8bc33dbdbfe6440e949626ab4940b97e |
| institution | Directory Open Access Journal |
| issn | 1471-2105 |
| language | English |
| last_indexed | 2024-12-10T14:47:10Z |
| publishDate | 2010-07-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Bioinformatics |
| spelling | doaj.art-8bc33dbdbfe6440e949626ab4940b97e2022-12-22T01:44:32ZengBMCBMC Bioinformatics1471-21052010-07-0111139110.1186/1471-2105-11-391Robust test method for time-course microarray experimentsGeorge Stephen LOwzar KourosSohn InsukKim SujongJung Sin-Ho<p>Abstract</p> <p>Background</p> <p>In a time-course microarray experiment, the expression level for each gene is observed across a number of time-points in order to characterize the temporal trajectories of the gene-expression profiles. For many of these experiments, the scientific aim is the identification of genes for which the trajectories depend on an experimental or phenotypic factor. There is an extensive recent body of literature on statistical methodology for addressing this analytical problem. Most of the existing methods are based on estimating the time-course trajectories using parametric or non-parametric mean regression methods. The sensitivity of these regression methods to outliers, an issue that is well documented in the statistical literature, should be of concern when analyzing microarray data.</p> <p>Results</p> <p>In this paper, we propose a robust testing method for identifying genes whose expression time profiles depend on a factor. Furthermore, we propose a multiple testing procedure to adjust for multiplicity.</p> <p>Conclusions</p> <p>Through an extensive simulation study, we will illustrate the performance of our method. Finally, we will report the results from applying our method to a case study and discussing potential extensions.</p>http://www.biomedcentral.com/1471-2105/11/391 |
| spellingShingle | George Stephen L Owzar Kouros Sohn Insuk Kim Sujong Jung Sin-Ho Robust test method for time-course microarray experiments BMC Bioinformatics |
| title | Robust test method for time-course microarray experiments |
| title_full | Robust test method for time-course microarray experiments |
| title_fullStr | Robust test method for time-course microarray experiments |
| title_full_unstemmed | Robust test method for time-course microarray experiments |
| title_short | Robust test method for time-course microarray experiments |
| title_sort | robust test method for time course microarray experiments |
| url | http://www.biomedcentral.com/1471-2105/11/391 |
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