T lymphocyte activation gene identification by coregulated expression on DNA microarrays

Genomics. 2004 Jun;83(6):989-99. doi: 10.1016/j.ygeno.2003.12.019.


High-capacity methods for assessing gene function have become increasingly important because of the increasing number of newly identified genes emerging from large-scale genome sequencing and cDNA cloning efforts. We investigated the use of DNA microarrays to identify uncharacterized genes specifically involved in human T cell activation. Activation of human peripheral blood T lymphocytes induced significant changes in hundreds of transcripts, but most of these were not unique to T cell activation. Variation of experimental parameters and analysis techniques allowed better enrichment for gene expression changes unique to T cell activation. Best results were achieved by identification of genes that were most highly coregulated with the T-cell-specific transcript interleukin 2 (IL2) in a "compendium" of experiments involving both T cells and other cell types. Among the genes most highly coregulated with IL2 were many genes known to function during T cell activation, together with ESTs of unknown function. Four of these ESTs were extended to novel full-length clones encoding T-cell-regulated proteins with predicted functions in GTP metabolism, cell organization, and signal transduction.

MeSH terms

  • Base Sequence
  • Expressed Sequence Tags
  • Gene Expression Profiling*
  • Gene Expression Regulation*
  • Guanosine Triphosphate / metabolism
  • Humans
  • Interleukin-2 / genetics
  • Lymphocyte Activation / genetics*
  • Molecular Sequence Data
  • Oligonucleotide Array Sequence Analysis*
  • Signal Transduction / genetics
  • T-Lymphocytes / metabolism*


  • Interleukin-2
  • Guanosine Triphosphate

Associated data

  • GENBANK/AF385429
  • GENBANK/AF385431
  • GENBANK/AF385435
  • GENBANK/AF385437