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Defects in Macrophage Recruitment and Host Defense in Mice Lacking the CCR2 Chemokine Receptor

Open access
Kurihara, Takao, Warr, Glenn, Loy, James, Bravo, Rodrigo·1997·The Journal of Experimental Medicine

Abstract

Chemokines are a structurally related family of cytokines that are important for leukocyte trafficking. The C-C chemokine monocyte chemoattractant protein-1 (MCP-1) is a potent monocyte activator in vitro and has been associated with monocytic infiltration in several inflammatory diseases. One C-C chemokine receptor, CCR2, has been identified that mediates in vitro responses to MCP-1 and its close structural homologues. CCR2 has also recently been demonstrated to be a fusion cofactor for several HIV isolates. To investigate the normal physiological function of CCR2, we generated mice with a targeted disruption of the ccr2 gene. Mice deficient for CCR2 developed normally and had no hematopoietic abnormalities. However, ccr2−/− mice failed to recruit macrophages in an experimental peritoneal inflammation model. In addition, these mice were unable to clear infection by the intracellular bacteria, Listeria monocytogenes. These results suggest that CCR2 has a nonredundant role as a major mediator of macrophage recruitment and host defense against bacterial pathogens and that MCP-1 and other CCR2 ligands are effectors of those functions.

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Metadata

Authors
Kurihara, T., Warr, G., Loy, J., & Bravo, R.
Venue
The Journal of Experimental Medicine
Published
1997-11-17
Volume
186
Issue
10
Pages
1757-1762
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W2111718223
Cited by
717
References
1
FWCI
12.31
Type
journal article
Language
en
Open access
bronze

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