PMID- 16020745 OWN - NLM STAT- MEDLINE DCOM- 20060106 LR - 20131121 IS - 1524-4636 (Electronic) IS - 1079-5642 (Linking) VI - 25 IP - 9 DP - 2005 Sep TI - Endogenous NO blockade enhances tissue factor expression via increased Ca2+ influx through MCP-1 in endothelial cells by monocyte adhesion. PG - 2005-11 AB - OBJECTIVE: Ca2+ plays an important role in tissue factor (TF) gene expression. We investigated the role of endogenous nitric oxide (NO) in the induction of TF expression in endothelial cells (ECs) by monocyte adhesion and the mechanisms of NO action. METHODS AND RESULTS: Inhibition of endogenous NO by Nomega-nitro-L-arginine methyl ester (L-NAME) enhanced TF promoter activity and protein expression induced in human coronary ECs by monocyte adhesion, as well as EC surface TF activity. L-NAME also induced monocyte chemoattractant protein-1 (MCP-1) expression, which was blocked by an NO donor, NOC18. Exogenous MCP-1 enhanced TF expression induced by monocyte adhesion, whereas adenovirus-mediated expression of the mutant MCP-1, 7ND, abolished the L-NAME enhancement of TF expression induced by monocyte adhesion. Monocyte attachment to L-NAME-treated ECs increased Ca2+ influx, which was prevented by NOC18, anti-MCP-1 antibody or 7ND. These results indicate that the binding of increased MCP-1 induced by endogenous NO blockade to CCR2 mediated the enhancement of Ca2+ influx only when monocytes adhered to ECs, which upregulated TF expression in ECs triggered by monocyte adhesion. CONCLUSIONS: MCP-1/CCR2 may play a role in Ca2+ influx-dependent TF regulation in the monocyte-EC interaction in the impairment of NO synthesis. FAU - Sakamoto, Takayuki AU - Sakamoto T AD - First Department of Internal Medicine, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan. FAU - Ishibashi, Toshiyuki AU - Ishibashi T FAU - Sakamoto, Nobuo AU - Sakamoto N FAU - Sugimoto, Koichi AU - Sugimoto K FAU - Egashira, Kensuke AU - Egashira K FAU - Ohkawara, Hiroshi AU - Ohkawara H FAU - Nagata, Kenji AU - Nagata K FAU - Yokoyama, Keiko AU - Yokoyama K FAU - Kamioka, Masashi AU - Kamioka M FAU - Ichiki, Toshihiro AU - Ichiki T FAU - Sugimoto, Naotoshi AU - Sugimoto N FAU - Kurabayashi, Masahiko AU - Kurabayashi M FAU - Suzuki, Koji AU - Suzuki K FAU - Takuwa, Yoh AU - Takuwa Y FAU - Maruyama, Yukio AU - Maruyama Y LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20050714 PL - United States TA - Arterioscler Thromb Vasc Biol JT - Arteriosclerosis, thrombosis, and vascular biology JID - 9505803 RN - 0 (CCL2 protein, human) RN - 0 (Chemokine CCL2) RN - 0 (Enzyme Inhibitors) RN - 31C4KY9ESH (Nitric Oxide) RN - 9035-58-9 (Thromboplastin) RN - SY7Q814VUP (Calcium) RN - V55S2QJN2X (NG-Nitroarginine Methyl Ester) SB - IM MH - Calcium/metabolism MH - Calcium Signaling/physiology MH - Cell Adhesion/drug effects/immunology MH - Cells, Cultured MH - Chemokine CCL2/genetics/*metabolism MH - Coronary Vessels/cytology MH - Endothelium, Vascular/cytology/immunology/*metabolism MH - Enzyme Inhibitors/pharmacology MH - Gene Transfer Techniques MH - Humans MH - Monocytes/*cytology/immunology MH - NG-Nitroarginine Methyl Ester/pharmacology MH - Nitric Oxide/antagonists & inhibitors/*metabolism MH - Thromboplastin/*metabolism EDAT- 2005/07/16 09:00 MHDA- 2006/01/07 09:00 CRDT- 2005/07/16 09:00 PHST- 2005/07/16 09:00 [pubmed] PHST- 2006/01/07 09:00 [medline] PHST- 2005/07/16 09:00 [entrez] AID - 01.ATV.0000178171.61754.cd [pii] AID - 10.1161/01.ATV.0000178171.61754.cd [doi] PST - ppublish SO - Arterioscler Thromb Vasc Biol. 2005 Sep;25(9):2005-11. doi: 10.1161/01.ATV.0000178171.61754.cd. Epub 2005 Jul 14.