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- W2017887957 abstract "Mechanisms of air pollution-induced exacerbation of cardiovascular disease are currently unknown, thus we examined the roles of vascular endothelin-1 (ET-1) and reactive oxygen species (ROS) in regulating mediators of vascular remodeling, namely matrix metalloproteinases (MMPs), after exposure to vehicle engine emissions.ApoE(-/-) mice were exposed by inhalation to filtered air or gasoline engine exhaust (GEE, 1:12 dilution) 6 hours per day for 1 or 7 days. Concurrently, mice were treated with either ET(A) receptor antagonist BQ-123 (100 ng/kg/d) via osmotic minipumps, Tempol (approximately 41 mg/kg/d, orally), or vehicle. GEE-exposure increased vascular MMP-2 and -9, endothelin-1 (ET-1), tissue inhibitor of metalloproteinases (TIMP)-2 mRNA and ROS levels. Aortic MMP protein and plasma MMP-9 were similarly upregulated. GEE-mediated increases in vascular ROS were attenuated by Tempol-treatment, as were MMP-2 and TIMP-2; whereas BQ-123 ameliorated GEE-induced vascular expression of MMP-9, MMP-2, ROS, and ET-1. In a parallel study, diesel exhaust exposure in volunteer human subjects induced significant increases in plasma ET-1 and MMP-9 expression and activity.These findings demonstrate that acute exposure to vehicular source air pollutants results in upregulation of circulating and vascular factors associated with progression of atherosclerosis, mediated in part through activation of ET-1-ET(A) receptor pathways." @default.
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- W2017887957 date "2009-04-01" @default.
- W2017887957 modified "2023-10-18" @default.
- W2017887957 title "Vehicular Emissions Induce Vascular MMP-9 Expression and Activity Associated With Endothelin-1–Mediated Pathways" @default.
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- W2017887957 doi "https://doi.org/10.1161/atvbaha.108.176107" @default.
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