Abstract | BACKGROUND:
Angiotensin-converting enzyme 2 (ACE2) is an endogenous counterregulator of the renin-angiotensin system that has been recently identified in circulating form. We aimed to investigate the relationship among changes in soluble ACE2 (sACE2) activity, myocardial performance, and long-term clinical outcomes in patients with acute decompensated heart failure (ADHF). We hypothesized that increasing sACE2 activity levels during intensive medical treatment are associated with improved myocardial performance and long-term clinical outcomes. METHODS AND RESULTS: In 70 patients admitted to the intensive care unit with ADHF, serum sACE2 activity levels, echocardiographic data, and hemodynamic variables were collected within 12 hours of admission (n = 70) and 48-72 hours after intensive medical treatment (n = 57). The median [interquartile range] baseline and 48-72-hour serum sACE2 activity levels were 32 [23-43] ng/mL and 40 [28-60] ng/mL, respectively. Baseline serum sACE2 activity levels correlated with surrogate measures of right ventricular diastolic dysfunction, including right atrial volume index (RAVi; r = 0.31; P = .010), tricuspid E/A ratio (r = 0.39; P = .007), and B-type natriuretic peptide (r = 0.32; P = .008). However, there were no correlations between serum sACE2 and left ventricular systolic or diastolic dysfunction. After intensive medical therapy, a 50% increase in baseline serum sACE2 levels predicted a significant reduction in risk of death, cardiac transplantation, or ADHF rehospitalization, including after adjustment for baseline age, RAVi, and BNP levels (hazard ratio 0.35, 95% confidence interval 0.12-0.84; P = .018). CONCLUSIONS: In patients admitted with ADHF, increasing serum sACE2 activity levels during intensive medical therapy predict improved outcomes independently from underlying cardiac indices.
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Authors | Zhili Shao, Kevin Shrestha, Allen G Borowski, David J Kennedy, Slava Epelman, James D Thomas, W H Wilson Tang |
Journal | Journal of cardiac failure
(J Card Fail)
Vol. 19
Issue 9
Pg. 605-10
(Sep 2013)
ISSN: 1532-8414 [Electronic] United States |
PMID | 24054336
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2013 Elsevier Inc. All rights reserved. |
Chemical References |
- Biomarkers
- Peptidyl-Dipeptidase A
- ACE2 protein, human
- Angiotensin-Converting Enzyme 2
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Topics |
- Acute Disease
- Adult
- Aged
- Angiotensin-Converting Enzyme 2
- Biomarkers
(blood)
- Enzyme Activation
(physiology)
- Female
- Heart Failure
(blood, diagnosis, therapy)
- Humans
- Intensive Care Units
(trends)
- Male
- Middle Aged
- Peptidyl-Dipeptidase A
(blood)
- Prognosis
- Prospective Studies
- Treatment Outcome
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