title: Boolean relationships among genes responsive to ionizing radiation in the NCI 60 ACDS.
abstract: BACKGROUND
  An early use of gene-expression data coming from microarrays was to discover non-linear multivariate intergene relationships. Pursuing this direction, the motivation for this paper is 2-fold: (1) to discover and elucidate multivariate logical predictive relations among gene expressions in a dataset arising from radiation studies using the NCI 60 Anti-Cancer Drug Screen (ACDS) cell lines; and (2) to demonstrate how these logical relations based on coarse quantization reflect corresponding relations in the continuous data.
  
  
  RESULTS
  Using the coefficient of determination, a large number of logical relationships have been discovered among genes in the NCI 60 ACDS cell lines. Moreover, these relationships can be seen directly in the original continuous data, and many are robust relative to the thresholds used to obtain the logical data from the continuous data. A key observation is that a number of intergene relationships appear to be considerably stronger when p53 is functional as compared to when it is not, which is consistent with earlier findings in the literature.
  
  
  BACKGROUND
  The appendix is available at http://gsp.tamu.edu/Publications/supplement.htm
  
  
  BACKGROUND
  edward@ee.tamu.edu.
authors.affiliation: Department of Electrical Engineering, Texas A&M University, College Station, TX 77843, USA.
authors.forename: Ranadip
authors.initials: R
authors.lastname: Pal
authors.forename: Aniruddha
authors.initials: A
authors.lastname: Datta
authors.forename: Albert J
authors.initials: AJ
authors.lastname: Fornace
authors.forename: Michael L
authors.initials: ML
authors.lastname: Bittner
authors.forename: Edward R
authors.initials: ER
authors.lastname: Dougherty
mesh_terms: D045744:Cell Line, Tumor / Q000378:metabolism / Q000528:radiation effects; D003198:Computer Simulation; D020869:Gene Expression Profiling / Q000379:methods*; D015972:Gene Expression Regulation, Neoplastic / Q000528:radiation effects*; D006801:Humans; D016015:Logistic Models; D008954:Models, Biological; D015999:Multivariate Analysis; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D009369:Neoplasms / Q000235:genetics / Q000378:metabolism*; D011839:Radiation, Ionizing; D015398:Signal Transduction / Q000528:radiation effects*
chemical_list: D009363:Neoplasm Proteins