BACKGROUND: Both neurohormonal derangements and alterations in the myocardial extracellular matrix are thought to contribute to adverse ventricular remodelling that results in worsening heart failure (HF). There is also emerging preclinical information to suggest that these signalling pathways mutually regulate in HF. AIM: To assess the relationships between plasma levels of matrix metalloproteinases (MMPs), tissue inhibitor of metalloproteinase (TIMP), and neurohormonal profiles in chronic HF. METHODS AND RESULTS: In this substudy of 184 HF patients enrolled in the Randomized Evaluation of Strategies for Left Ventricular Dysfunction (RESOLVD) trial, plasma norepinephrine and epinephrine were measured with HPLC; atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), angiotensin II, aldosterone, and endothelin-1 were measured with immunoassays; MMP-2, MMP-9, and TIMP-1 were measured with 2-site sandwich ELISA assays. We used Spearman's rank correlation to examine the relationships between plasma MMP and neurohormone levels. Circulating ANP, BNP, andendothelin-1 levels were positively correlated with MMP-2 and TIMP-1 levels. Plasma level of aldosterone showed a weak positive correlation with MMP-9, but there was no significant correlation between angiotensin II, epinephrine or norepinephrine and MMP-2, MMP-9, or TIMP-1. CONCLUSIONS: These findings suggest that specific neurohormones and extracellular matrix modulators may play a coordinated role in the pathogenesis of HF.
RCT Entities:
BACKGROUND: Both neurohormonal derangements and alterations in the myocardial extracellular matrix are thought to contribute to adverse ventricular remodelling that results in worsening heart failure (HF). There is also emerging preclinical information to suggest that these signalling pathways mutually regulate in HF. AIM: To assess the relationships between plasma levels of matrix metalloproteinases (MMPs), tissue inhibitor of metalloproteinase (TIMP), and neurohormonal profiles in chronic HF. METHODS AND RESULTS: In this substudy of 184 HF patients enrolled in the Randomized Evaluation of Strategies for Left Ventricular Dysfunction (RESOLVD) trial, plasma norepinephrine and epinephrine were measured with HPLC; atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), angiotensin II, aldosterone, and endothelin-1 were measured with immunoassays; MMP-2, MMP-9, and TIMP-1 were measured with 2-site sandwich ELISA assays. We used Spearman's rank correlation to examine the relationships between plasma MMP and neurohormone levels. Circulating ANP, BNP, and endothelin-1 levels were positively correlated with MMP-2 and TIMP-1 levels. Plasma level of aldosterone showed a weak positive correlation with MMP-9, but there was no significant correlation between angiotensin II, epinephrine or norepinephrine and MMP-2, MMP-9, or TIMP-1. CONCLUSIONS: These findings suggest that specific neurohormones and extracellular matrix modulators may play a coordinated role in the pathogenesis of HF.
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