NF-κB and STAT5 play important roles in the regulation of mouse toll-like receptor 2 gene expression

T. Musikacharoen, T. Matsuguchi, T. Kikuchi, Yasunobu Yoshikai

    Research output: Contribution to journalArticle

    102 Citations (Scopus)

    Abstract

    Toll-like receptor 2 (TLR2) is involved in the innate immunity by recognizing various bacterial components. We have previously reported that TLR2 gene expression is rapidly induced by LPS or inflammatory cytokines in macrophages, and by TCR engagement or IL-2/IL-15 stimulation in T cells. Here, to investigate the mechanisms governing TER2 transcription, we cloned the 5′ upstream region of the mouse TLR2 (mTLR2) gene and mapped its transcriptional start site. The 5′ upstream region of the mTLR2 gene contains two NF-κB, two CCAAT/enhancer binding protein, one cAMP response element-binding protein, and one STAT consensus sequences. In mouse macrophage cell lines, deletion of both NF-κB sites caused the complete loss of mTLR2 promoter responsiveness to TNF-α. NF-κB sites were also important but not absolutely necessary for LPS-mediated mTLR2 promoter activation. In T cell lines, mTLR2 responsiveness to IL-15 was abrogated by the 3′ NF-κB mutation, whereas 5′ NF-κB showed no functional significance. The STAT binding site also seemed to contribute, as the deletion of this sequence significantly reduced the IL-15-mediated mTLR2 promoter activation. EMSAs confirmed nuclear protein binding to both NF-κB sites in macrophages following LPS and TNF-α stimulation and to the 3′ NF-κB site in T cells after IL-15 treatment. Thus, NF-κB activation is important but differently involved in the regulation of mTLR2 gene expression in macrophages and T cells following LPS or cytokine stimulation.

    Original languageEnglish
    Pages (from-to)4516-4524
    Number of pages9
    JournalJournal of Immunology
    Volume166
    Issue number7
    Publication statusPublished - Apr 1 2001

    Fingerprint

    Interleukin-15
    Gene Expression
    Macrophages
    T-Lymphocytes
    Toll-Like Receptor 2
    CCAAT-Enhancer-Binding Proteins
    Cytokines
    Cell Line
    Cyclic AMP Response Element-Binding Protein
    Sequence Deletion
    Consensus Sequence
    Nuclear Proteins
    Mouse Tlr2 protein
    Innate Immunity
    Protein Binding
    Genes
    Interleukin-2
    Binding Sites
    Mutation

    All Science Journal Classification (ASJC) codes

    • Immunology and Allergy
    • Immunology

    Cite this

    Musikacharoen, T., Matsuguchi, T., Kikuchi, T., & Yoshikai, Y. (2001). NF-κB and STAT5 play important roles in the regulation of mouse toll-like receptor 2 gene expression. Journal of Immunology, 166(7), 4516-4524.

    NF-κB and STAT5 play important roles in the regulation of mouse toll-like receptor 2 gene expression. / Musikacharoen, T.; Matsuguchi, T.; Kikuchi, T.; Yoshikai, Yasunobu.

    In: Journal of Immunology, Vol. 166, No. 7, 01.04.2001, p. 4516-4524.

    Research output: Contribution to journalArticle

    Musikacharoen, T, Matsuguchi, T, Kikuchi, T & Yoshikai, Y 2001, 'NF-κB and STAT5 play important roles in the regulation of mouse toll-like receptor 2 gene expression', Journal of Immunology, vol. 166, no. 7, pp. 4516-4524.
    Musikacharoen T, Matsuguchi T, Kikuchi T, Yoshikai Y. NF-κB and STAT5 play important roles in the regulation of mouse toll-like receptor 2 gene expression. Journal of Immunology. 2001 Apr 1;166(7):4516-4524.
    Musikacharoen, T. ; Matsuguchi, T. ; Kikuchi, T. ; Yoshikai, Yasunobu. / NF-κB and STAT5 play important roles in the regulation of mouse toll-like receptor 2 gene expression. In: Journal of Immunology. 2001 ; Vol. 166, No. 7. pp. 4516-4524.
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