title: Revealing transforming growth factor-beta signaling transduction in human kidney by gene expression data mining.
abstract: Tumor growth factor-beta (TGF-beta) is a key mediator of glomerular and tubulointerstitial pathobiology in chronic kidney disease. Its signaling transduction controls a diverse number of biological processes in a dynamic and context-dependent manner. We applied a data mining strategy to deconvolute gene expression patterns across hundreds of microarray data sets to reveal members of the TGF-beta signaling network in human kidney. This strategy is composed of three major steps: (i) select genes known to be involved and expressionally regulated in TGF-beta signaling as "bait"; (ii) select microarray data sets in which the bait genes are strongly co-regulated; (iii) identify (or "fish") additional TGF-beta signaling genes by a non-parametric statistic-based gene scoring system (NP score). The 40 genes with highest NP scores and significant permutation p values were selected for in silico validation, and used to identify a network, in which 35 of these genes were found to be connected by literature- derived relationships. Transcription factors were found to be enriched in the top list. Among them, activated transcription factor 3 (ATF3) had the highest NP score, and was proposed to play a pivotal role in TGF-beta signaling in human kidney. Finally, we implemented a non-parametric pathway ranking (NPPR) tool (Mootha et al., 2003) to rank pathways and identified canonical biological pathways associated with the down-stream of TGF-beta signaling.
authors.affiliation: Bioinformatics Division, GlaxoSmithKline, King of Prussia, Pennsylvania 19406, USA. guanghui.2.hu@gsk.com
authors.forename: Guanghui
authors.initials: G
authors.lastname: Hu
authors.forename: Komal
authors.initials: K
authors.lastname: Jain
authors.forename: Mark
authors.initials: M
authors.lastname: Hurle
mesh_terms: D019295:Computational Biology; D005786:Gene Expression Regulation; D006801:Humans; D007668:Kidney / Q000378:metabolism*; D046228:Microarray Analysis; D008954:Models, Biological; D008962:Models, Theoretical; D015203:Reproducibility of Results; D015398:Signal Transduction; D018709:Statistics, Nonparametric; D014157:Transcription Factors / Q000235:genetics* / Q000378:metabolism; D016212:Transforming Growth Factor beta / Q000235:genetics* / Q000378:metabolism
chemical_list: D014157:Transcription Factors; D016212:Transforming Growth Factor beta