PMID- 9362535 OWN - NLM STAT- MEDLINE DCOM- 19971203 LR - 20220318 IS - 0022-1007 (Print) IS - 1540-9538 (Electronic) IS - 0022-1007 (Linking) VI - 186 IP - 10 DP - 1997 Nov 17 TI - Defects in macrophage recruitment and host defense in mice lacking the CCR2 chemokine receptor. PG - 1757-62 AB - 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. FAU - Kurihara, T AU - Kurihara T AD - Department of Oncology, Bristol-Myers Squibb Pharmaceutical Research Institute, Princeton, New Jersey 08543-4000, USA. FAU - Warr, G AU - Warr G FAU - Loy, J AU - Loy J FAU - Bravo, R AU - Bravo R LA - eng PT - Journal Article PL - United States TA - J Exp Med JT - The Journal of experimental medicine JID - 2985109R RN - 0 (Ccr2 protein, mouse) RN - 0 (Receptors, CCR2) RN - 0 (Receptors, Chemokine) SB - IM MH - Animals MH - Cell Movement/*genetics/*immunology MH - Female MH - Immunity, Innate/genetics MH - Listeria monocytogenes/growth & development/immunology MH - Listeriosis/genetics/microbiology/pathology MH - Macrophages/*immunology/metabolism/*pathology MH - Male MH - Mice MH - Mice, Inbred ICR MH - Mice, Knockout MH - Receptors, CCR2 MH - Receptors, Chemokine/*deficiency/*genetics PMC - PMC2199145 EDAT- 1997/12/31 00:00 MHDA- 1997/12/31 00:01 PMCR- 1998/05/17 CRDT- 1997/12/31 00:00 PHST- 1997/12/31 00:00 [pubmed] PHST- 1997/12/31 00:01 [medline] PHST- 1997/12/31 00:00 [entrez] PHST- 1998/05/17 00:00 [pmc-release] AID - 10.1084/jem.186.10.1757 [doi] PST - ppublish SO - J Exp Med. 1997 Nov 17;186(10):1757-62. doi: 10.1084/jem.186.10.1757.