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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Accelerated secretion of brain natriuretic peptide from the hypertrophied ventricles in experimental malignant hypertension.

Plasma concentrations of immunoreactive (ir) atrial (ANP) and brain ( BNP) natriuretic peptides were measured in the prehypertensive and hypertensive phases in spontaneously hypertensive rats (SHR) and in the malignant phase of hypertension caused by deoxycorticosterone acetate (DOCA)-salt in SHR. The secretory rate of ANP and BNP were examined in the perfusion of isolated beating heart before and after atrial removal. Plasma irANP and irBNP in mature SHR were higher than those of control Wistar-Kyoto (WKY) rats, whereas ANP and BNP values in young SHR did not differ from those of control WKY rats. DOCA-salt treatment for 8 weeks markedly increased blood pressure, ventricular weight, and plasma irANP and irBNP in SHR. ANP and BNP values were positively correlated with ventricular weight in DOCA-salt SHR. The secretory rate of ANP and BNP from the perfused whole heart were much higher in DOCA-salt SHR than other rat groups. A large amount of BNP was secreted from the hypertrophied ventricles in DOCA-salt SHR. In contrast, ANP was mainly secreted from the atrium in all rat groups. High-performance liquid chromatography profiles of extract in plasma showed that a major component of irANP and irBNP corresponded to synthetic rat ANP-(1-28) and rat BNP-45, respectively. Results suggest that both rat ANP-(1-28) and rat BNP-45 are markedly increased in plasma in DOCA-salt-induced malignant hypertension of SHR and that the major source of circulating BNP is the hypertrophied ventricles in this model.[1]


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