title: Influence of image-analysis software on quantitation of two-dimensional gel electrophoresis data.
abstract: Image analysis of two-dimensional gels is a crucial step in a proteomic workflow and has a direct impact on obtained qualitative and quantitative data. Since the analysis is a complex process and creates large data amounts, the use of a respective software is inevitable. There are only a few papers published addressing the issue of analysis-based variance; therefore, our aim was to highlight the discrepancy of received results when different commercially available image-tools are used for gel analysis especially in terms of comparability of the obtained outcome when the same digital image set is used. A set of six gels (three replicates per group) of real-life samples was created and examined with two different versions of PD-Quest (Bio-Rad) (version 6.1 and its update version 8.0) and with an external image-tool Delta 2D (Decodon) (version 3.6). Replicate groups were analyzed and compared with each other with regard to volume ratios of a group of significantly changed spots. The study points out significant variations among results depending on the software package used, underlining the importance of a careful investigation of post-experimental processes to receive comparable and reliable results.
authors.affiliation: Department of Medicinal Chemistry, University of Vienna, Austria.
authors.forename: Martina
authors.initials: M
authors.lastname: Stessl
authors.forename: Christian R
authors.initials: CR
authors.lastname: Noe
authors.forename: Bodo
authors.initials: B
authors.lastname: Lachmann
mesh_terms: D015180:Electrophoresis, Gel, Two-Dimensional / Q000379:methods*; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D020543:Proteome / Q000032:analysis*; D015203:Reproducibility of Results
chemical_list: D020543:Proteome