title: Nitric oxide inhibits macrophage-colony stimulating factor gene transcription in vascular endothelial cells.
abstract: Macrophage-colony stimulating factor (M-CSF) contributes to atherogenesis by regulating macrophage-derived foam cells in atherosclerotic lesions. Here we report that nitric oxide (NO) inhibits the expression of M-CSF in human vascular endothelial cells independent of guanylyl cyclase activation. The induction of M-CSF mRNA expression by either oxidized low density lipoprotein (ox-LDL) or tumor necrosis factor-alpha (TNF alpha) was attenuated by NO donors, S-nitrosoglutathione (GSNO), sodium nitroprusside (SNP), and 3-morpholinosydnonimine, but not by cGMP analogues, glutathione, or nitrite. Inhibition of endogenous NO production by N-monomethyl-L-arginine (L-NMA) also increased M-CSF expression in control and TNF alpha-stimulated cells. Nuclear run-on assays and transfection studies using M-CSF promoter constructs linked to chloramphenicol acetyltransferase reporter gene indicated that NO repressed M-CSF gene transcription through nuclear factor-kappa B (NF-kappa B). Electrophoretic mobility shift assays demonstrated that activation of NF-kappa B by L-NMA, ox-LDL, and TNF alpha was attenuated by GSNO and SNP, but not by glutathione or cGMP analogues. Since the induction of M-CSF expression depends upon NF-kappa B activation, the ability of NO to inhibit NF-kappa B activation and M-CSF expression may contribute to some of NO's antiatherogenic properties.
authors.affiliation: Cardiovascular Division, Brigham & Women's Hospital, Boston, Massachusetts, USA.
authors.forename: H B
authors.initials: HB
authors.lastname: Peng
authors.forename: T B
authors.initials: TB
authors.lastname: Rajavashisth
authors.forename: P
authors.initials: P
authors.lastname: Libby
authors.forename: J K
authors.initials: JK
authors.lastname: Liao
mesh_terms: D001483:Base Sequence; D002478:Cells, Cultured; D004730:Endothelium, Vascular / Q000378:metabolism*; D005786:Gene Expression Regulation; D005978:Glutathione / Q000031:analogs & derivatives / Q000494:pharmacology; D006801:Humans; D008077:Lipoproteins, LDL / Q000494:pharmacology; D016173:Macrophage Colony-Stimulating Factor / Q000235:genetics*; D008969:Molecular Sequence Data; D016328:NF-kappa B / Q000378:metabolism; D009569:Nitric Oxide / Q000502:physiology*; D009603:Nitroso Compounds / Q000494:pharmacology; D026422:S-Nitrosoglutathione; D014158:Transcription, Genetic / Q000187:drug effects; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: D008077:Lipoproteins, LDL; D016328:NF-kappa B; D009603:Nitroso Compounds; D014409:Tumor Necrosis Factor-alpha; D009569:Nitric Oxide; D026422:S-Nitrosoglutathione; D016173:Macrophage Colony-Stimulating Factor; D005978:Glutathione