PMID- 9400834 OWN - NLM STAT- MEDLINE DCOM- 19971230 LR - 20190516 IS - 0741-5400 (Print) IS - 0741-5400 (Linking) VI - 62 IP - 6 DP - 1997 Dec TI - Monocyte chemoattractant protein-2 is a potent agonist of CCR2B. PG - 911-5 AB - The binding and functional activity of the CC chemokines monocyte chemoattractant protein-1 (MCP-1), MCP-2, and MCP-3 have been characterized using Chinese hamster ovary DXB-11 cells transfected with the chemokine receptor CCR2B. Receptor binding studies demonstrated that 125I-labeled MCP-1 bound to a single class of high-affinity receptors with a Kd of 0.14 (0.07-0.32) nM. In competition studies MCP-1, MCP-2, and MCP-3 completely inhibited 125I-labeled MCP-1 binding with Ki values of 0.3 (0.16-0.46), 8.8 (3.4-26), and 12.2 (0.6-22) nM, respectively. In calcium mobilization studies, MCP-1 and MCP-3 induced robust elevations in intracellular calcium concentrations, whereas MCP-2 was only weakly active. In contrast, using changes in extracellular acidification rate as a functional readout, all three chemokines were identified as potent agonists of CCR2B. These data demonstrate that MCP-2, in addition to MCP-1 and MCP-3, is a potent agonist of CCR2B and furthermore that MCP-2 activates either different or a subset of the signaling pathways activated by MCP-1 and MCP-3. FAU - Moore, U M AU - Moore UM AD - Rhone-Poulenc Rorer Ltd., Dagenham Research Centre, Essex, United Kingdom. Una.Moore@DRC.RP-Rorer.rp.fr FAU - Kaplow, J M AU - Kaplow JM FAU - Pleass, R D AU - Pleass RD FAU - Castro, S W AU - Castro SW FAU - Naik, K AU - Naik K FAU - Lynch, C N AU - Lynch CN FAU - Daly, S AU - Daly S FAU - Roach, A G AU - Roach AG FAU - Jaye, M AU - Jaye M FAU - Williams, R J AU - Williams RJ LA - eng PT - Journal Article PL - England TA - J Leukoc Biol JT - Journal of leukocyte biology JID - 8405628 RN - 0 (CCL8 protein, human) RN - 0 (CCR2 protein, human) RN - 0 (Chemokine CCL8) RN - 0 (Monocyte Chemoattractant Proteins) RN - 0 (Receptors, CCR2) RN - 0 (Receptors, Chemokine) RN - 0 (Receptors, Cytokine) SB - IM MH - Animals MH - CHO Cells MH - Chemokine CCL8 MH - Cricetinae MH - Humans MH - Monocyte Chemoattractant Proteins/metabolism/*pharmacology MH - Receptors, CCR2 MH - *Receptors, Chemokine MH - Receptors, Cytokine/*agonists/genetics/metabolism MH - *Signal Transduction MH - Transfection EDAT- 1997/12/24 00:00 MHDA- 1997/12/24 00:01 CRDT- 1997/12/24 00:00 PHST- 1997/12/24 00:00 [pubmed] PHST- 1997/12/24 00:01 [medline] PHST- 1997/12/24 00:00 [entrez] AID - 10.1002/jlb.62.6.911 [doi] PST - ppublish SO - J Leukoc Biol. 1997 Dec;62(6):911-5. doi: 10.1002/jlb.62.6.911.