Title: Chemokines synergize in the recruitment of circulating neutrophils into inflamed tissue
Authors: Struyf, Sofie * ×
Gouwy, Mieke *
Dillen, Chris
Proost, Paul
Opdenakker, Ghislain
Van Damme, Jozef #
Issue Date: May-2005
Publisher: Wiley-VCH
Series Title: European Journal of Immunology vol:35 issue:5 pages:1583-1591
Abstract: The innate immune response against micro-organisms is mediated by phagocytes, attracted by chemokines and other G protein-coupled receptor (GPCR) ligands. Originally, we observed increased neutrophil migration by the interaction of inflammatory CXC chemokines such as IL-8/CXCL8 and granulocyte chemotactic protein (GCP)-2/CXCL6 with regakine-1, a CC chemokine constitutively present in plasma. We here demonstrate statistically significant synergy between regakine-1 and the neutrophil attractants C5a or IL-8/CXCL8 in inducing neutrophil shape change and migration under agarose. In addition, regakine-1 attracted human bone marrow granulocytes and enhanced their chemotactic response to IL-8/CXCL8 in a dose-dependent manner. Thus, plasma chemokines may regulate the number of circulating leukocytes under homeostatic conditions and may facilitate extra recruitment of bone marrow neutrophils during inflammation. Indeed, in vivo, regakine-1 provoked a mild neutrophilia in rabbits upon intravenous injection. We also observed that the CC chemokines regakine-1 and monocyte chemotactic protein-3/CCL7 as well as the CXC chemokine stromal cell-derived factor-1alpha/CXCL12 co-operated with murine GCP-2 after intraperitoneal co-administration to increase neutrophil influx in mice. These data demonstrate that inducible and constitutive GPCR ligands synergize to enhance inflammation and facilitate a more effective immune response.
ISSN: 0014-2980
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Laboratory of Molecular Immunology (Rega Institute)
Laboratory of Immunobiology (Rega Institute)
* (joint) first author
× corresponding author
# (joint) last author

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