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- W1987321293 abstract "To study whether telmisartan, an angiotensin II (AII) receptor blocker (ARB), modulates endothelial inflammation and oxidative cell damage induced by AII-independent stimuli in cultured human umbilical vein endothelial cell (HUVEC)s.Endothelial inflammation, as reflected by increased VCAM-1 and ICAM-1 expression (ELISA), was induced by TNF-alpha, an inflammatory cytokine, and cell damage (COMET and MTT assay) by hydrogen peroxide, a reactive oxygen species. Losartan, another ARB, its active metabolites (EXP-3174, EXP-3179), dexamethasone, a synthetic steroid, and pyrrolidine dithiocarbamate (PDTC), an anti-oxidant, were the controls. The contribution of PPAR-gamma agonism was assessed through synthetic PPAR-gamma agonists and antagonists and the antagonism for AII-type 1 receptor-mediated stimuli by evaluating the interference against cell death induced by AII (MTT assay), a pro-apoptotic peptide that induces oxidative stress. The in vitro scavenging properties for oxyradicals were quantified by the TOSC assay.Telmisartan and PDTC reduced TNF-alpha-stimulated VCAM-1 in a concentration-dependent manner while losartan, EXP-3174, EXP-3179 and dexamethasone were ineffective. All compounds did not modify ICAM-1 expression. PPAR-gamma agonists or antagonists did not interfere with the effect of telmisartan. Both ARBs antagonized AII-induced cell death but only telmisartan reduced hydrogen peroxide-induced cell damage. Telmisartan scavenged selectively hydroxyl radicals without affecting peroxyl radicals and peroxynitrite.Telmisartan modulates pleiotropically TNF-alpha induced VCAM-1 expression and oxidative damage in vascular endothelium, possibly by acting as a hydroxyl radical scavenger. Those anti-inflammatory and antioxidant properties may contribute to the therapeutic effect, although the applicability of these data to the clinical situations has to be verified." @default.
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- W1987321293 date "2008-05-01" @default.
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- W1987321293 title "Anti-inflammatory and anti-oxidant properties of telmisartan in cultured human umbilical vein endothelial cells" @default.
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- W1987321293 doi "https://doi.org/10.1016/j.atherosclerosis.2007.09.013" @default.
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