p63 Induces CD4+ T-Cell Chemoattractant TARC/CCL17 in Human Epithelial Cells
pmid: 18937546
p63 Induces CD4+ T-Cell Chemoattractant TARC/CCL17 in Human Epithelial Cells
To preserve immunosurveillance, epithelial cells support T-cell trafficking toward inflammatory foci. However, how epithelial cells are enrolled in recruiting T cells has not been fully elucidated. In this study we investigated the function of p63, a p53 family member, in the regulation of the expression of various types of chemokine ligands by focusing on the property of p63 as an epitheliotropic transcription factor. As assessed by experiments using three different human epithelial cell lines with small-interfering RNAs or plasmids of p63, certain CC chemokine ligands were found to be under the control of p63. In these CC chemokine ligands, p63 had the common capacity to upregulate TARC/CCL17 in the different cell lines, whose receptor CCR4 was preferentially presented on CD4(+) T cells such as memory, regulatory, IL-17-producing and type II helper T cells. More interestingly, when cells were stimulated with transforming growth factor-beta (TGF-beta) or epidermal growth factor (EGF) as observed during tissue repair process, the expression of p63 and TARC/CCL17 was concomitantly suppressed. This implies that, in local inflammatory regions with general epithelial tissue remodeling, the p63-TARC/CCL17 axis may participate in the engagement of efficient immune reactions by specified T-cell subsets.
CD4-Positive T-Lymphocytes, Receptors, CXCR, Epidermal Growth Factor, Transcription, Genetic, Transforming Growth Factor beta, Humans, Membrane Proteins, Epithelial Cells, Chemokine CCL17, Cell Line
CD4-Positive T-Lymphocytes, Receptors, CXCR, Epidermal Growth Factor, Transcription, Genetic, Transforming Growth Factor beta, Humans, Membrane Proteins, Epithelial Cells, Chemokine CCL17, Cell Line
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