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- W2000596634 abstract "We investigated the role of angiotensin II in vascular and circulating inflammatory markers in spontaneously hypertensive rats (SHR). IL-1beta, IL-6, and TNF-alpha aortic mRNA expression and plasma levels were measured in adult SHR untreated or treated with the angiotensin II receptor antagonist candesartan (2 mg.kg(-1).day(-1)) or antihypertensive triple therapy (TT; in mg.kg(-1).day(-1): 20 hydralazine + 7 type 1 hydrochlorothiazide + 0.15 reserpine) for 10 wk. Likewise, aortic expression of NF-kappaB p50 subunit precursor p105 and its inhibitor (IkappaB) were measured. Age-matched Wistar-Kyoto rats (WKY) served as normotensive reference. High blood pressure levels were associated with increased (P < 0.05) aortic mRNA expression of IL-1beta, IL-6, and TNF-alpha. Hypertension was also accompanied by increased IL-1beta and IL-6 plasma levels. No differences were observed in circulating TNF-alpha levels between SHR and WKY. SHR presented elevated aortic mRNA expression of the transcription factor NF-kappaB and reduction in its inhibitor, IkappaB. Candesartan decreased (P < 0.05) blood pressure levels, aortic mRNA expression of IL-1beta, IL-6, and TNF-alpha, and (P < 0.05) IL-1beta and IL-6 plasma concentration. However, although arterial pressure decrease was comparable for the treatments, TT only partially reduced the increments in inflammatory markers. In fact, candesartan-treated rats showed significantly lower levels of circulating and vascular inflammatory markers than TT-treated animals. The treatments increased IkappaB mRNA expression similarly. However, only candesartan reduced NF-kappaB mRNA expression. In summary, 1) SHR presented a vascular inflammatory process; 2) angiotensin II, and increased hemodynamic forces associated with hypertension, seems to be involved in stimulation of inflammatory mediators through NF-kappaB system activation; and 3) reduction of inflammatory mediators produced by candesartan in SHR could be partially due to both downregulation of NF-kappaB and upregulation of IkappaB." @default.
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- W2000596634 date "2005-01-01" @default.
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- W2000596634 title "Effect of AT<sub>1</sub> receptor antagonism on vascular and circulating inflammatory mediators in SHR: role of NF-κB/IκB system" @default.
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- W2000596634 doi "https://doi.org/10.1152/ajpheart.01061.2003" @default.
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