PMID- 15207250 OWN - NLM STAT- MEDLINE DCOM- 20050124 LR - 20171116 IS - 1043-4666 (Print) IS - 1043-4666 (Linking) VI - 27 IP - 1 DP - 2004 Jul 7 TI - High level expression, activation, and antagonism of CC chemokine receptors CCR2 and CCR3 in Chinese hamster ovary cells. PG - 38-46 AB - The specificity of leukocyte trafficking in inflammation is controlled by the interactions of chemokines with chemokine receptors. Reliable structure-function studies of chemokine-receptor interactions would benefit from cell lines that express consistent high levels of chemokine receptors. We describe herein two new Chinese hamster ovary (CHO) cell lines in which the genes for chemokine receptors CCR2 and CCR3 have been incorporated into identical positions in the host genome. CCR2 is the primary receptor for the chemokine monocyte chemoattractant protein-1 (MCP-1) whereas CCR3 is the primary receptor for the chemokines eotaxin-1, eotaxin-2 and eotaxin-3. Both receptors are expressed at >5,000,000 copies per cell, substantially higher levels than in previous cell lines, and both are competent for binding and activation by the cognate chemokines for these receptors. Using these cell lines we confirm that eotaxin-1 and eotaxin-3 can act as an agonist and an antagonist, respectively, of CCR2. In addition, we show that eotaxin-2 is an antagonist of CCR2 and MCP-1 is an agonist of CCR3. Comparison of the chemokine sequences reveals several positions that are identical in MCP-1 and eotaxin-1 but different in eotaxin-2 and eotaxin-3, suggesting that these amino acids play a role in CCR2 activation. FAU - Parody, Todd R AU - Parody TR AD - Department of Chemistry, Indiana University, Bloomington, IN 47405-0001, USA. FAU - Stone, Martin J AU - Stone MJ LA - eng GR - GM 55055/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Cytokine JT - Cytokine JID - 9005353 RN - 0 (CCL11 protein, human) RN - 0 (CCL2 protein, human) RN - 0 (CCL26 protein, human) RN - 0 (CCR2 protein, human) RN - 0 (CCR3 protein, human) RN - 0 (Chemokine CCL11) RN - 0 (Chemokine CCL2) RN - 0 (Chemokine CCL26) RN - 0 (Chemokines) RN - 0 (Chemokines, CC) RN - 0 (Receptors, CCR2) RN - 0 (Receptors, CCR3) RN - 0 (Receptors, Chemokine) RN - SY7Q814VUP (Calcium) SB - IM MH - Amino Acid Sequence MH - Animals MH - Binding, Competitive MH - CHO Cells MH - Calcium/metabolism MH - Chemokine CCL11 MH - Chemokine CCL2/pharmacology/physiology MH - Chemokine CCL26 MH - Chemokines/*pharmacology/physiology MH - Chemokines, CC/pharmacology/physiology MH - Cricetinae MH - Cricetulus MH - Molecular Sequence Data MH - Radioligand Assay MH - Receptors, CCR2 MH - Receptors, CCR3 MH - Receptors, Chemokine/*agonists/*antagonists & inhibitors/metabolism MH - Sequence Alignment MH - Structure-Activity Relationship EDAT- 2004/06/23 05:00 MHDA- 2005/01/26 09:00 CRDT- 2004/06/23 05:00 PHST- 2003/10/18 00:00 [received] PHST- 2004/03/16 00:00 [revised] PHST- 2004/03/30 00:00 [accepted] PHST- 2004/06/23 05:00 [pubmed] PHST- 2005/01/26 09:00 [medline] PHST- 2004/06/23 05:00 [entrez] AID - S1043466604000985 [pii] AID - 10.1016/j.cyto.2004.03.013 [doi] PST - ppublish SO - Cytokine. 2004 Jul 7;27(1):38-46. doi: 10.1016/j.cyto.2004.03.013.