title: The case for well-conducted experiments to validate statistical protocols for 2D gels: different pre-processing = different lists of significant proteins.
abstract: BACKGROUND
  The proteomics literature has seen a proliferation of publications that seek to apply the rapidly improving technology of 2D gels to study various biological systems. However, there is a dearth of systematic studies that have investigated appropriate statistical approaches to analyse the data from these experiments.
  
  
  RESULTS
  Comparison of the effects of statistical pre-processing on the results of two sample t-tests suggests that the results of 2D gel experiments and by extension the conclusions derived from these experiments are not independent of the statistical protocol used.
  
  
  CONCLUSIONS
  This study suggests that there is a need for well-conducted validation studies to establish optimal statistical techniques to be used on such data sets.
authors.affiliation: Biostatistics and Bioinformatics Unit, Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA. Sreelatha.Meleth@ccc.uab.edu
authors.forename: Sreelatha
authors.initials: S
authors.lastname: Meleth
authors.forename: Jessy
authors.initials: J
authors.lastname: Deshane
authors.forename: Helen
authors.initials: H
authors.lastname: Kim
mesh_terms: D000818:Animals; D001709:Biotechnology / Q000379:methods*; D001921:Brain / Q000378:metabolism; D019295:Computational Biology / Q000379:methods; D003627:Data Interpretation, Statistical; D030562:Databases, Protein; D015180:Electrophoresis, Gel, Two-Dimensional / Q000379:methods*; D020869:Gene Expression Profiling / Q000379:methods; D007525:Isoelectric Focusing; D007526:Isoelectric Point; D013058:Mass Spectrometry; D015233:Models, Statistical; D011506:Proteins / Q000032:analysis / Q000737:chemistry*; D020543:Proteome; D040901:Proteomics / Q000379:methods*; D012313:RNA; D051381:Rats; D017207:Rats, Sprague-Dawley; D015203:Reproducibility of Results; D012107:Research Design; D012984:Software
chemical_list: D011506:Proteins; D020543:Proteome; D012313:RNA