title: Large-scale differential display analysis of T helper cell differentiation.
abstract: We have developed a novel large-scale multicapillary fluorescent differential display (FDD) platform amenable to further automation. The power of the method is demonstrated by the analysis of T helper cell differentiation. Eight RNA samples from wild type, Stat4 knockout and Stat6 knockout mice were analyzed with 16 anchoring primers and 24 arbitrary primers, resulting in 285 294 sample peaks. Visually selected patterns of differential expression suggest two major regulatory mechanisms: activation and Stat4 genotype. A subset of the findings is reproduced in the confirmatory differential display (DD) that included technical and biological replicates. In a small fragment identification pilot study, we identify Ifi27 and Cct8 to be up-regulated by T cell activation. We present a method for the analysis of electropherogram similarity across large datasets, based on correlation of low-resolution representations of electrophoretic data. We show how it can be applied to analyze experimental and technical variables. Using this method, we demonstrate the effect of activation and genotype. In addition, agreement of our real experimental data to the theoretical basis of DD, as well as issues in anchoring primer selectivity, are studied.
authors.affiliation: Turku Centre for Biotechnology, University of Turku and Abo Akademi University, Finland. pekka.ojala@btk.fi
authors.forename: Pekka
authors.initials: P
authors.lastname: Ojala
authors.forename: Eveliina
authors.initials: E
authors.lastname: Virtanen
authors.forename: Zhi
authors.initials: Z
authors.lastname: Chen
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000235:genetics; D019075:Electrophoresis, Capillary / Q000295:instrumentation*; D005453:Fluorescence; D020869:Gene Expression Profiling / Q000295:instrumentation*; D008213:Lymphocyte Activation / Q000235:genetics*; D051379:Mice; D018345:Mice, Knockout; D012333:RNA, Messenger / Q000032:analysis*; D050797:STAT4 Transcription Factor / Q000235:genetics; D050800:STAT6 Transcription Factor / Q000235:genetics; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*
chemical_list: D012333:RNA, Messenger; D050797:STAT4 Transcription Factor; D050800:STAT6 Transcription Factor; C494100:Stat6 protein, mouse