title: T-helper type 2 cell-specific expression of the ST2 gene is regulated by transcription factor GATA-3.
abstract: ST2 is a member of the interleukin-1 receptor family and is expressed in type-2 T helper (Th2) cells. Here, we have studied the molecular mechanism responsible for the transcriptional regulation of the ST2 gene in Th2 cells using a mouse thymoma cell line, EL-4. The ST2 gene has distal and proximal promoters. ST2 mRNA was produced from the distal promoter in EL-4 cells stimulated with both phorbol 12-myristate 13-acetate (PMA) and dibutyryl cAMP (Bt2cAMP). The region of approximately 100 bp upstream of transcription start site, containing two GATA consensus sites, was indispensable for the activation of the distal promoter in reporter gene analysis. An electrophoretic mobility shift assay showed that transcription factor GATA-3 bound one of the GATA consensus sites (from -84 to -79) with nuclear extracts from PMA plus Bt2cAMP-stimulated EL-4 cells. The overexpression of GATA-3 enhanced the activity of the distal promoter. On the other hand, mutations of the GATA consensus site canceled out the enhancement by GATA-3. These data suggest that GATA-3 is an important transcription factor for the expression of the ST2 gene in Th2 cells.
authors.affiliation: Department of Biochemistry, Jichi Medical School, 3311-1 Yakushiji, Minamikawachi-machi, Kawachi-gun, Tochigi 329-0498, Japan.
authors.forename: Morisada
authors.initials: M
authors.lastname: Hayakawa
authors.forename: Ken
authors.initials: K
authors.lastname: Yanagisawa
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Aoki
authors.forename: Hiroko
authors.initials: H
authors.lastname: Hayakawa
authors.forename: Naoki
authors.initials: N
authors.lastname: Takezako
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Tominaga
mesh_terms: D000818:Animals; D001483:Base Sequence; D015153:Blotting, Western; D003994:Bucladesine / Q000494:pharmacology; D002460:Cell Line; D017931:DNA Primers; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D024202:Electrophoretic Mobility Shift Assay; D050990:GATA3 Transcription Factor; D040461:Gene Components; D005786:Gene Expression Regulation / Q000187:drug effects / Q000235:genetics*; D000072179:Interleukin-1 Receptor-Like 1 Protein; D008156:Luciferases; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D008969:Molecular Sequence Data; D010957:Plasmids / Q000235:genetics; D018123:Receptors, Interleukin; D020133:Reverse Transcriptase Polymerase Chain Reaction; D006377:T-Lymphocytes, Helper-Inducer / Q000378:metabolism*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D015534:Trans-Activators / Q000235:genetics / Q000378:metabolism*; D014162:Transfection
chemical_list: D017931:DNA Primers; D004268:DNA-Binding Proteins; D050990:GATA3 Transcription Factor; C494748:Gata3 protein, mouse; C486189:Il1rl1 protein, mouse; D000072179:Interleukin-1 Receptor-Like 1 Protein; D008565:Membrane Proteins; D018123:Receptors, Interleukin; D015534:Trans-Activators; D003994:Bucladesine; D008156:Luciferases; D013755:Tetradecanoylphorbol Acetate