title: DNA microarray analysis of the gene expression profiles of naïve versus activated tumor-specific T cells.
abstract: T cells are a key element in effective cancer immunity, recognizing MHC-antigen peptide complexes on the surface of antigen presenting cells and translating these signals into cytotoxic effector T cell responses. In this study, we systematically investigated by DNA array analysis the expression profiles of 514 immunologically relevant genes in naïve and SP2/0 tumor-specific activated mouse T cell populations. Our data shows that naïve T cells expressed 37 (i.e., 7.6% of the 514) transcripts with expression level (EL) values of > or =2.0, while the activated T cells expressed 101 such transcripts. The expression levels of 9 (1.75% of 514) of the shared transcripts were equivalent in the two populations of T cells. Ninety-six genes were differently expressed upon T cell activation, with 71 (13.81%) being up-regulated and 25 (4.86%) down-regulated. The list of significantly affected genes includes numerous cytokines and their receptors (e.g., IL-2Ralpha, IL-6Ralpha, IL-7Ralpha, IL-16, IL-17R, TGF-beta), chemokines and chemokine receptors (e.g., RANTES, CCR7, CXCR4), alternate surface proteins (e.g., 4-1BB, GITR, integrins-alphaL and -beta7, L-selectin, CD6, CD45 and EMMPRIN), cytoplasmic signaling intermediates (e,g., GATA-3, 14-3-3-eta, CIS1, SMAD4 and JAK1) and an array of other molecules (e.g., NFkappa-B inducing kinase, LTBP3 and persephin), several of which are associated with Th1 responses, and T cell self-regulation or migration. Taken together, our data contribute to our understanding of the generalized processes that accompany T cell activation and, more specifically, to our understanding of the processes associated with T cell activation during antitumor responses.
authors.affiliation: Department of Oncology, Research Unit, Saskatchewan Cancer Agency, University of Saskatchewan, Saskatoon Cancer Center, 20 Campus Drive CM200, Saskatoon, Saskatchewan, Canada S7N 0W0.
authors.forename: Xueshu
authors.initials: X
authors.lastname: Zhang
authors.forename: Zhuang
authors.initials: Z
authors.lastname: Chen
authors.forename: Hui
authors.initials: H
authors.lastname: Huang
authors.forename: John R
authors.initials: JR
authors.lastname: Gordon
authors.forename: Jim
authors.initials: J
authors.lastname: Xiang
mesh_terms: D000818:Animals; D016207:Cytokines / Q000235:genetics / Q000378:metabolism; D004273:DNA, Neoplasm / Q000032:analysis; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D008213:Lymphocyte Activation / Q000235:genetics*; D016246:Lymphocytes, Tumor-Infiltrating / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D009101:Multiple Myeloma / Q000235:genetics / Q000276:immunology; D020411:Oligonucleotide Array Sequence Analysis; D051381:Rats; D018121:Receptors, Cytokine / Q000235:genetics / Q000378:metabolism; D016176:T-Lymphocyte Subsets / Q000276:immunology*; D014407:Tumor Cells, Cultured
chemical_list: D016207:Cytokines; D004273:DNA, Neoplasm; D018121:Receptors, Cytokine