PMID- 11139364 OWN - NLM STAT- MEDLINE DCOM- 20010222 LR - 20171116 IS - 1089-8603 (Print) IS - 1089-8603 (Linking) VI - 4 IP - 6 DP - 2000 Dec TI - Expression of inducible nitric oxide synthase and Fas/Fas ligand correlates with the incidence of apoptotic cell death in atheromatous plaques of human coronary arteries. PG - 561-71 AB - It was recently reported that inducible nitric oxide synthase was expressed in advanced atheromatous plaques. So we investigated the effect of NO or peroxynitrite reactive product of NO or O(2)(-) released by iNOS induced in macrophages or T lymphocytes on inflammatory cells in atheromatous plaques of human coronary arteries by immunohistochemistry. We found that iNOS was expressed in T lymphocytes and macrophages in T lymphocytes and macrophages coexisted advanced atheromatous areas. Most of the smooth muscle cells are not coexisted with T lymphocytes. We could not find iNOS in those smooth muscle cells. Only a small number of iNOS-positive smooth muscle cells were found close to T lymphocytes and macrophages. Markers for apoptotic cells induced in situ terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) showed that many apoptotic T lymphocytes and macrophages existed near iNOS induced cells. Fas and Fas ligand were expressed in almost same areas that iNOS was expressed. By double-label immunostaining, Fas was expressed in T lymphocytes but Fas ligand was expressed in macrophages and in some T lymphocytes. These results suggest that NO from iNOS induces Fas and Fas ligand-mediated apoptosis and associates with regression of atherosclerosis. On the other hand, nitrotyrosine was detected wider areas than iNOS. So peroxynitrite from iNOS damages cells and tissues widely and may associate with progression of atherosclerosis. These results suggest an important role of iNOS in mediating both regressive changes and progressive change in atheromatous plaques. CI - Copyright 2000 Academic Press. FAU - Esaki, T AU - Esaki T AD - Department of Geriatrics, Nagoya University School of Medicine, 65 Turuma-cho, Showa-ku, Nagoya 466, Japan. tesaki@ucla.edu FAU - Hayashi, T AU - Hayashi T FAU - Muto, E AU - Muto E FAU - Kano, H AU - Kano H FAU - Kumar, T N AU - Kumar TN FAU - Asai, Y AU - Asai Y FAU - Sumi, D AU - Sumi D FAU - Iguchi, A AU - Iguchi A LA - eng PT - Journal Article PL - United States TA - Nitric Oxide JT - Nitric oxide : biology and chemistry JID - 9709307 RN - 0 (FASLG protein, human) RN - 0 (Fas Ligand Protein) RN - 0 (Membrane Glycoproteins) RN - 0 (fas Receptor) RN - 3604-79-3 (3-nitrotyrosine) RN - 42HK56048U (Tyrosine) RN - EC 1.14.13.39 (NOS2 protein, human) RN - EC 1.14.13.39 (Nitric Oxide Synthase) RN - EC 1.14.13.39 (Nitric Oxide Synthase Type II) SB - IM MH - Aged MH - Aged, 80 and over MH - Apoptosis MH - Coronary Artery Disease/*metabolism/pathology MH - Coronary Vessels/*metabolism/pathology MH - Fas Ligand Protein MH - Female MH - Humans MH - Immunohistochemistry MH - In Situ Nick-End Labeling MH - Male MH - Membrane Glycoproteins/*metabolism MH - Nitric Oxide Synthase/*metabolism MH - Nitric Oxide Synthase Type II MH - Tyrosine/*analogs & derivatives/metabolism MH - fas Receptor/*metabolism EDAT- 2001/01/05 11:00 MHDA- 2001/03/03 10:01 CRDT- 2001/01/05 11:00 PHST- 2001/01/05 11:00 [pubmed] PHST- 2001/03/03 10:01 [medline] PHST- 2001/01/05 11:00 [entrez] AID - S1089-8603(00)90311-2 [pii] AID - 10.1006/niox.2000.0311 [doi] PST - ppublish SO - Nitric Oxide. 2000 Dec;4(6):561-71. doi: 10.1006/niox.2000.0311.