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- W2313636115 abstract "The cardioprotective benefits of bradykinin are attributable to activation of its B2 receptor (B2R)–mediated actions and abolished by B2R antagonists. The current experiments evaluated the cardioprotective potential of a potent, long-acting B2R-selective agonist peptide analogue of bradykinin, the compound NG291. We compared the extent of cardiac tissue damage and remodeling and expression pattern of selected genes in mice submitted to acute myocardial infarct (MI) and treated for 1 week with either NG291 [Hyp3,Thi5,NChg7,Thi8]-bradykinin or with saline delivered via osmotic minipump. Active treatment resulted in better ejection fraction (EF) 69 ± 1% vs. 61 ± 3.1% (P = 0.01), (vs. 85 ± 1.3% in sham-operated controls), fractional shortening (FS) 38 ± 4% vs. 32 ± 8% (NS) (vs. 53 ± 1.2 in sham-operated controls), and fewer markers of myocyte apoptosis (TUNEL-positive nuclei 4.9 ± 1.1% vs. 9.7 ± 0.03%, P = 0.03). Systolic blood pressure (SBP) at end point was normal at 110 ± 4.2 in actively treated mice, but tended to be lower at 104 ± 4.7mmHg in saline controls with decreased cardiac systolic capacity. Expression patterns of selected genes to factors related to tissue injury, inflammation, and metabolism (i.e., the B1R, B2R, endothelial nitric oxide synthase (eNOS), TNF-α, cardiomyopathy-associated 3 (Cmya3), and pyruvate dehydrogenase kinase isoenzyme 4 (PDK4)) showed that acute MI induced significant upregulation of these genes, and active treatment prevented or attenuated this upregulation, whereas the B2R agonist itself produced no difference in the myocardium of sham-operated mice. Treatment with a selective B2R agonist initiated at the time of induction of acute MI in mice had a beneficial effect on cardiac function, tissue remodeling, and inflammation-related tissue gene expression, which may explain its structural and functional benefits." @default.
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- W2313636115 date "2010-05-01" @default.
- W2313636115 modified "2023-09-25" @default.
- W2313636115 title "Cardioprotective Effects of a Selective B2 Receptor Agonist of Bradykinin Post-Acute Myocardial Infarct" @default.
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- W2313636115 doi "https://doi.org/10.1038/ajh.2010.20" @default.
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