title: A multi-strategy approach to informative gene identification from gene expression data.
abstract: An unsupervised multi-strategy approach has been developed to identify informative genes from high throughput genomic data. Several statistical methods have been used in the field to identify differentially expressed genes. Since different methods generate different lists of genes, it is very challenging to determine the most reliable gene list and the appropriate method. This paper presents a multi-strategy method, in which a combination of several data analysis techniques are applied to a given dataset and a confidence measure is established to select genes from the gene lists generated by these techniques to form the core of our final selection. The remainder of the genes that form the peripheral region are subject to exclusion or inclusion into the final selection. This paper demonstrates this methodology through its application to an in-house cancer genomics dataset and a public dataset. The results indicate that our method provides more reliable list of genes, which are validated using biological knowledge, biological experiments, and literature search. We further evaluated our multi-strategy method by consolidating two pairs of independent datasets, each pair is for the same disease, but generated by different labs using different platforms. The results showed that our method has produced far better results.
authors.affiliation: Institute for Information Technology, National Research Council Canada, Ottawa, Ontario K1A0R6, Canada. ziying.liu@nrc-cnrc.gc.ca
authors.forename: Ziying
authors.initials: Z
authors.lastname: Liu
authors.forename: Sieu
authors.initials: S
authors.lastname: Phan
authors.forename: Fazel
authors.initials: F
authors.lastname: Famili
authors.forename: Youlian
authors.initials: Y
authors.lastname: Pan
authors.forename: Anne E G
authors.initials: AE
authors.lastname: Lenferink
authors.forename: Christiane
authors.initials: C
authors.lastname: Cantin
authors.forename: Catherine
authors.initials: C
authors.lastname: Collins
authors.forename: Maureen D
authors.initials: MD
authors.lastname: O'Connor-McCourt
mesh_terms: D000818:Animals; D001185:Artificial Intelligence; D002471:Cell Transformation, Neoplastic / Q000187:drug effects / Q000235:genetics; D019295:Computational Biology; D030541:Databases, Genetic; D003663:Decision Trees; D020869:Gene Expression Profiling / Q000706:statistics & numerical data*; D023281:Genomics / Q000706:statistics & numerical data; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000235:genetics; D051379:Mice; D020411:Oligonucleotide Array Sequence Analysis / Q000706:statistics & numerical data*; D016212:Transforming Growth Factor beta / Q000494:pharmacology
chemical_list: D016212:Transforming Growth Factor beta