Distinct transcriptional programs activated by interleukin-10 with or without lipopolysaccharide in dendritic cells: Induction of the B cell-activating chemokine, CXC chemokine ligand 13

Patrick Perrier, Fernando O. Martinez, Massimo Locati, Giancarlo Bianchi, Manuela Nebuloni, Gianluca Vago, Flavia Bazzoni, Silvano Sozzani, Paola Allavena, Alberto Mantovani

Research output: Contribution to journalArticlepeer-review

Abstract

To understand the modulation of dendritic cell (DC) function by IL-10, gene expression profiling was performed by using Affymetrix technology (Santa Clara, CA) in human monocyte-derived DC treated with IL-10, alone or in combination with LPS. The modulation of selected genes was validated by real-time PCR, Northern blot, and protein production. IL-10 regulated in DC the expression of a limited number of genes, including IL-7, the receptors for transferrin and vitamin D3, structural matrix proteins, and signal transduction elements. The combined treatment with LPS plus IL-10 modulated a number of genes comparable to LPS alone, but the expression profiles were distinct. As expected, IL-10 suppressed the expression of several LPS-inducible proinflammatory molecules. Among genes uniquely modulated by the concomitant treatment with LPS plus IL-10, phosphatidylinositol 3-kinase γ was down-regulated while the suppressor of cytokine signaling 3, signaling lymphocytic activation molecule, regulator of G protein signaling 16, and the chemokine, CXC chemokine ligand (CXCL) 13, were up-regulated. Overall, four distinct transcriptional programs were identified, related to: 1) control of immunity and inflammation; 2) tuning of cytokine receptor and G protein-coupled receptor signaling; 3) remodeling of extracellular matrix; and 4) B cell function and lymphoid tissue neogenesis. Among the latter genes, we further demonstrate that IL-10 synergizes with TLR ligands for the production of functionally active B cell-attracting chemokine, CXCL13, in both myeloid and plasmacytoid DC. This novel finding reveals that IL-10 sustains humoral immunity by inducing the production in APCs of the chemokine, CXCL13, which amplifies B cell recruitment and promotes lymphoid tissue neogenesis.

Original languageEnglish
Pages (from-to)7031-7042
Number of pages12
JournalJournal of Immunology
Volume172
Issue number11
Publication statusPublished - Jun 1 2004

ASJC Scopus subject areas

  • Immunology

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