Integrated High-Resolution Genome-Wide Analysis of Gene Dosage and Gene Expression in Human Brain Tumors
| Abstract |
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A hallmark genomic feature of human brain tumors is the presence of multiple complex structural and numerical chromosomal
aberrations that result in altered gene dosages. These genetic alterations lead to widespread, genome-wide gene expression
changes. Both gene expression as well as gene copy number profiles can be assessed on a large scale using microarray methodology.
The integration of genetic data with gene expression data provides a particularly effective approach for cancer gene discovery.
Utilizing an array of bioinformatics tools, we describe an analysis algorithm that allows for the integration of gene copy
number and gene expression profiles as a first-pass means of identifying potential cancer gene targets in human (brain) tumors.
This strategy combines circular binary segmentation for the identification of gene copy number alterations, and gene copy
number and gene expression data integration with a modification of signal-to-noise ratio computation and random permutation
testing. We have evaluated this approach and confirmed its efficacy in the human glioma genome.
Affiliation(s): (2) Division of Oncology, Center for Clinical Sciences Research, Stanford University School of Medicine, Stanford, CA
(3) Department of Neurosurgery, Center for Clinical Sciences Research, Stanford University School of Medicine, Stanford, CA
(3) Department of Neurosurgery, Center for Clinical Sciences Research, Stanford University School of Medicine, Stanford, CA
Series: Methods in Molecular Biology | Volume: 377 | Pub. Date: May-03-2007 | Page Range: 187-202 | DOI: 10.1007/978-1-59745-390-5_12
Subject: Genetics/Genomics
Key Words: Array-comparative genomic hybridization - array-CGH - brain tumor - circular binary segmentation - cDNA microarray - gene copy number alteration - gene expression profiling - glioma - permutation testing - signal-to-noise ratio
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