Human BNP is a potent inhibitor of the vasoconstrictive actions of endothelin-1 (ED50 = 1.9 nmol/L) and phenylephrine (ED50 = 10 nmol/L) on isolated human artery tissue, similar to human ANP.
Does human BNP induce vasorelaxation in isolated human artery and vein tissue compared to ANP and CNP?
Human BNP demonstrates potent vasorelaxant effects on human arterial tissue, comparable to ANP, inhibiting vasoconstriction from endothelin-1 and phenylephrine.
Effect estimate: BNP ED50 = 1.9 nmol/L (endothelin-1), 10 nmol/L (phenylephrine)
Brain natriuretic peptide (BNP) is a cardiac-derived peptide hormone with cardiovascular and renal actions that is structurally and functionally related to atrial natriuretic peptide (ANP). Previous studies using rat vascular tissue have demonstrated a direct vasorelaxant effect of BNP. However, species-specific potency issues have precluded an accurate measurement of the effect of human BNP. This report demonstrates the vasorelaxant effects of human BNP on human vascular tissue prepared from internal mammary artery and saphenous vein samples. The vasorelaxant effect of human BNP is compared to the other members of the natriuretic peptide family, human ANP and C-type natriuretic peptide (CNP). With regard to potency and magnitude of effect, human BNP and human ANP were similar in relaxing arterial tissue preconstricted with endothelin-1 (BNP ED50 = 1.9 nmol/L and ANP ED50 = 1.8 nmol/L) or phenylephrine (BNP ED50 = 10 nmol/L and ANP ED50 = 19 nmol/L), while CNP was significantly less effective. All three natriuretic peptides exhibited weak venodilating action. These data demonstrate that human BNP is a potent inhibitor of the vasoconstrictive actions of endothelin-1 and the alpha-adrenergic agonist phenylephrine on isolated human artery tissue preparations.
Andrew A. Protter (Wed,) conducted a other in Isolated human vascular tissue. Human brain natriuretic peptide (BNP) vs. Human ANP and C-type natriuretic peptide (CNP) was evaluated on Vasorelaxant effect on arterial tissue preconstricted with endothelin-1 or phenylephrine (BNP ED50 = 1.9 nmol/L (endothelin-1), 10 nmol/L (phenylephrine)). Human BNP is a potent inhibitor of the vasoconstrictive actions of endothelin-1 (ED50 = 1.9 nmol/L) and phenylephrine (ED50 = 10 nmol/L) on isolated human artery tissue, similar to human ANP.