SDED: a novel filter method for cancer-related gene selection
Wenlong Xu1, Minghui Wang, Xianghua Zhang
1Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, China.
Bioinformation
|May 15, 2008
Summary
A new gene selection method, standard deviation error distribution (SDED), improves prediction accuracy in leukemia datasets. SDED identifies more biologically significant genes compared to existing methods like GS2 and CHO.
Area of Science:
- Bioinformatics
- Computational Biology
- Genomics
Background:
- Gene selection is crucial for identifying significant genes in expression data.
- Comparing numerous genes with limited samples presents a challenge for statistical analysis.
- Effective gene selection methods are vital for accurate phenotype discrimination in classification tasks.
Purpose of the Study:
- To introduce and evaluate the standard deviation error distribution (SDED) method for gene selection.
- To assess the performance of SDED against established methods (GS2, CHO) using leukemia datasets.
- To determine if SDED can identify genes with greater biological significance.
Main Methods:
- The standard deviation error distribution (SDED) method was developed, utilizing within-class and among-class variations in gene expression data.
- SDED was tested on four publicly available leukemia gene expression datasets.
- Performance was benchmarked against GS2 and CHO methods, with prediction accuracy and biological significance as key metrics.
Main Results:
- SDED demonstrated superior prediction accuracies compared to GS2 (0.8-4.2% higher) and CHO (1.6-8.4% higher) across different datasets.
- Gene set enrichment analyses (OMIM, KEGG pathways) confirmed SDED identified a higher percentage of biologically significant genes (4.0% more than GS2, 6.1% more than CHO).
Conclusions:
- The standard deviation error distribution (SDED) method offers improved gene selection performance for complex biological data.
- SDED provides enhanced accuracy and identifies more biologically relevant genes than conventional methods.
- This method holds promise for advancing gene expression analysis in cancer research and other fields.
Related Concept Videos
02:46Genetic Screens
Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which result in visible changes...
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which result in visible changes...
01:05Cancer-Critical Genes II: Tumor Suppressor Genes
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
01:05Cancer-Critical Genes II: Tumor Suppressor Genes
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...