Analysis of the gene expression profile activated by the CC chemokine ligand 5/RANTES and by lipopolysaccharide in human monocytes

Massimo Locati, Ullrich Deuschle, Maria L. Massardi, Fernando O. Martinez, Marina Sironi, Silvano Sozzani, Tamas Bartfai, Alberto Mantovani

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The gene expression profile induced by the CC chemokine ligand (CCL) 5/RANTES in human monocytes was examined using the oligonucleotide array technology. Of 5600 transcripts examined, 42 were consistently induced by CCL5, and none were suppressed. Chemokine-inducible transcripts could be clustered in functional groups, including selected cytokines and receptors (e.g., IL-1β, CCL2/monocyte chemotactic protein-1, and the CCL5 receptor CCR1) and molecules involved in extracellular matrix recognition and digestion (e.g., CD44 splice transcripts, urokinase-type plasminogen activator receptor, matrix metalloprotease (MMP)-9, and MMP-19). Transcript expression, confirmed by quantitative real-time PCR analysis for selected genes, was associated with protein induction for some (e.g., CCL2), but not all (e.g., IL-1β), transcripts examined. The chemokine-induced gene profile was distinct from that activated by LPS, a prototypic phagocyte activator. Although certain transcripts were stimulated by both agonists (e.g., IL-1β and CCL2), others were induced only by either LPS (e.g., TNF-α and IL-6) or CCL5 (e.g., MMP-19) or were divergently regulated (e.g., CCR1). Thus, CCL5, a prototypic CC inflammatory chemokine, activates a restricted transcriptional program in monocytes distinct from that induced by the prototypic pathogen-derived proinflammatory stimulant LPS. Chemokine-induced chemokines production could represent a novel amplification loop of leukocyte recruitment, while a subset of chemokine-inducible transcripts could be involved in monocyte extravasation and tissue invasion.

Original languageEnglish
Pages (from-to)3557-3562
Number of pages6
JournalJournal of Immunology
Issue number7
Publication statusPublished - Apr 1 2002

ASJC Scopus subject areas

  • Immunology


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