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- W2049537824 abstract "Background: BNP is a cardiac peptide with vasodilatory, natriuretic and diuretic properties. Recent studies have suggested that its vasodilatory hypotensive properties may limit the renal actions of BNP, especially in patients with borderline low blood pressure. We have recently identified an alternatively spliced transcript for BNP (ASBNP) that includes a unique and distinct longer carboxyl-terminus consisting of 34 amino acids. Based upon preliminary studies, we generated a truncated form (ASBNP2.1) that contains the first 16 amino acids of the C-terminal of ASBNP. Methods: We determined the cardiorenal and humoral actions of intravenous infusion of ASBNP2.1 at 2 pmol/Kg/min, 10 pmol/Kg/min and 100 pmol/Kg /min in 10 dogs with rapid ventricular pacing induced overt CHF (240 bpm for 10 days). ∗p < 0.05. Results: IV infusion of ASBNP 2.1 increased aquaresis (from 0.19 ± 0.04 to 0.32 ± 0.07, 0.46 ± 0.11 and 0.39 ± 0.09 ml/min∗) without a significant change in urinary sodium excretion. Importantly, ASBNP 2.1 enhanced glomerular filtration rate (GFR), from 31 ± 4 to 47 ± 8, 69 ± 10 and 56 ± 9 ml/min∗. These renal actions were associated with increases in urinary BNP∗, ANP∗ and cGMP∗ excretion. BNP 2.1 did not have any systemic vasodilatory action resulting in no change in mean arterial blood pressure or cardiac-filling pressures even at the highest dose. There was not change in serum sodium concentration. Conclusion: We report for the first time that this novel peptide based upon ASBNP has potent aquaretic and GFR enhancing actions without the vasodilatory hypotensive properties in an experimental model of overt CHF. The lack of vasodilatation but with renal actions also suggest that the C-terminus plays a key role in the vascular actions of this peptide offering new insights into vascular-renal structure function of BNP and related peptides. This renal specific peptide may have potential therapeutic benefit in states of renal dysfunction with volume overload to enhance GFR and water excretion without the detrimental side effect of hypotension." @default.
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- W2049537824 date "2007-08-01" @default.
- W2049537824 modified "2023-10-18" @default.
- W2049537824 title "A Novel Aquaretic and GFR Enhancing Peptide without Vascular Vasodilatory Actions in Experimental CHF" @default.
- W2049537824 doi "https://doi.org/10.1016/j.cardfail.2007.06.322" @default.
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