Work

A novel approach for increasing sensitivity and correcting saturation artifacts of radioactively labeled cDNA arrays

Year: 2004

Type: article

Abstract: MOTIVATION: The radioactivity labeled DNA array platform is a robust and accurate way for a high-throughput measurement of gene expression levels in biological samples. Despite its high degree of sensitivity and reproducibility, this platform has several sources of variation. These are related to the presence of saturation effects in the array images and impede the degree of accuracy at which gene expression levels are determined. RESULTS: Here we describe a simple, but effective, approach for combining expression data from a series of autoradiographic exposures of variable length. This technique increases the sensitivity of this array platform by detecting low-expressed genes at longer exposures. It also improves the measurement accuracy of highly abundant genes by considering only values from the linear portion of dependency between the exposure times and gene intensities. As a result, the described approach improves the outcome of the subsequent steps of array data normalization and mining.

Source: Bioinformatics

DOI: 10.1093/bioinformatics/bth188

Authors: Troy D. Querec, Radka Stoyanova, Eric Ross, Christos Patriotis

Institution: Fox Chase Cancer Center

Language: English

Topic: Gene expression and cancer classification

Subfield: Molecular Biology

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: bronze

Funders: National Institutes of Health, National Cancer Institute

Awards: G2949917957, G296135677, FCCC-PENN SPORE in Ovarian Cancer, ROLE OF TPL-2, CYCLIN D1 AND TOUVLO IN BREAST CANCER