title: Atorvastatin prevents hypoxia-induced inhibition of endothelial nitric oxide synthase expression but does not affect heme oxygenase-1 in human microvascular endothelial cells.
abstract: Beneficial cardiovascular effects of statins, the inhibitors of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase, are particularly assigned to the modulation of inflammation. Endothelial nitric oxide synthase (eNOS) and heme oxygenase-1 (HO-1) are listed among the crucial protective, anti-inflammatory genes in the vasculature. Here we show that atorvastatin at pharmacologically relevant concentration (0.1 microM) enhanced the expression of eNOS in human microvascular endothelial cells (HMEC-1). Moreover, atorvastatin prevented hypoxia-induced decrease in eNOS expression. However, in the same cells atorvastatin was ineffective in modulation of HO-1 protein level. Therefore, we suggest that the protective effect of statins at their pharmacological concentrations is not mediated by enhancement of HO-1 activity, but may involve eNOS.
authors.affiliation: Department of Medical Biotechnology, Faculty of Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Loboda
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Jazwa
authors.forename: Alicja
authors.initials: A
authors.lastname: Jozkowicz
authors.forename: Jerzy
authors.initials: J
authors.lastname: Dorosz
authors.forename: Jozsef
authors.initials: J
authors.lastname: Balla
authors.forename: Grietje
authors.initials: G
authors.lastname: Molema
authors.forename: Jozef
authors.initials: J
authors.lastname: Dulak
mesh_terms: D050197:Atherosclerosis / Q000378:metabolism; D000069059:Atorvastatin; D015153:Blotting, Western; D002478:Cells, Cultured; D004730:Endothelium, Vascular / Q000378:metabolism*; D015971:Gene Expression Regulation, Enzymologic; D051547:Heme Oxygenase-1 / Q000096:biosynthesis*; D006538:Heptanoic Acids / Q000494:pharmacology*; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000494:pharmacology*; D006937:Hypercholesterolemia / Q000378:metabolism; D000860:Hypoxia; D008833:Microcirculation / Q000378:metabolism; D052250:Nitric Oxide Synthase Type III / Q000096:biosynthesis*; D011758:Pyrroles / Q000494:pharmacology*; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D006538:Heptanoic Acids; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors; D011758:Pyrroles; D000069059:Atorvastatin; D052250:Nitric Oxide Synthase Type III; D051547:Heme Oxygenase-1