Cited by 583Atrial Fibrillation Management and OutcomesCardiac Fibrosis and RemodelingCardiac electrophysiology and arrhythmias

Increased expression of extracellular signal-regulated kinase and angiotensin-converting enzyme in human atria during atrial fibrillation

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Goette, Andreas, Staack, Thorsten, Röcken, Christoph, Arndt, Marco, Geller, J.Christoph, Huth, Christof, Ansorge, Siegfried, Klein, Helmut U +1 more·2000·Journal of the American College of Cardiology

Abstract

Objectives The purpose of this study was to determine whether atrial expression of the extracellular signal-regulated kinases Erk1/Erk2 and of the angiotensin-converting enzyme (ACE) is altered in patients with atrial fibrillation (AF).Background Recent studies have demonstrated that atrial fibrosis can provide a pathophysiologic substrate for AF. However, the molecular mechanisms responsible for the development of atrial fibrosis are unclear.Methods Atrial tissue samples of 43 patients undergoing open heart surgery were examined. Seventeen patients had chronic persistent AF (> or =6 months; CAF), 8 patients had paroxysmal AF (PAF) and 18 patients had no history of AF. Erk expression was analyzed at the mRNA (quantitative reverse transcription polymerase chain reaction), the protein (immunoblot techniques) and atrial tissue (immunohistochemistry) levels. Erk-activating kinases (MEK1/2) and ACE were analyzed by immunoblot techniques.Results Increased amounts of Erk2-mRNA were found in patients with CAF (75 +/- 20 U vs. sinus rhythm: 31 +/- 25 U; p < 0.05). Activated Erk1/Erk2 and MEK1/2 were increased to more than 150% in patients with AF compared to patients with sinus rhythm. No differences between CAF and PAF were found. The expression of ACE was three-fold increased during CAF. Amounts of activated Erk1/Erk2 were reduced in patients treated with ACE inhibitors. Patients with AF showed an increased expression of Erk1/Erk2 in interstitial cells and marked atrial fibrosis.Conclusions An ACE-dependent increase in the amounts of activated Erk1/Erk2 in atrial interstitial cells may contribute as a molecular mechanism for the development of atrial fibrosis in patients with AF. These findings may have important impact on the treatment of AF.

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Research works printed but not linked: 3

  1. Kannel WB, Abbott RD, Savage DD, McNamara PM. Epidemio- logical features of atrial fibrillation: the Framingham Study. N Engl J Med 1982;306:1018 -22.
  2. Goette et al. JACC Vol. 35, No. 6, 2000 Erk and ACE Expression During AF May 2000:1669-77
  3. Weber KT, Brilla CG. Pathophysiologic hypertrophy and cardiac interstitium. Circulation 1991;83:1849 -65.

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Authors
Goette, A., Staack, T., Röcken, C., Arndt, M., Geller, J. C., Huth, C., Ansorge, S., Klein, H. U., & Lendeckel, U.
Affiliations
University Hospital Magdeburg (DE)
Corresponding author
Goette, Andreas
Venue
Journal of the American College of Cardiology
Publisher
Elsevier BV
Published
2000-05
Volume
35
Issue
6
Pages
1669-1677
ISSN
0735-1097 (ISSN-L)
OpenAlex
W2038843437
Cited by
583
References
47
Citations by year
2026: 5 · 2025: 8 · 2024: 14 · 2023: 10 · 2022: 17 · 2021: 17 · 2020: 15 · 2019: 17 · 2018: 10 · 2017: 17 · 2016: 20 · 2015: 17 · 2014: 23 · 2013: 24 · 2012: 27
FWCI
10.88
Type
journal article
Language
en
Open access
Locations
  • Journal of the American College of Cardiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Deutsche Forschungsgemeinschaft
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Atrial Fibrillation Management and Outcomes
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Fibrosis and Remodeling
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
Keywords
atrial fibrillation, extracellular signal-regulated kinase, ERK1/ERK2, angiotensin-converting enzyme, atrial fibrosis, MEK1/2, interstitial cells, chronic atrial fibrillation, paroxysmal atrial fibrillation, ACE inhibitors, MAPK signaling
MeSH terms
Aged, Atrial Fibrillation, Endomyocardial Fibrosis, Female, Heart Atria, Humans, Peptidyl-Dipeptidase A, Male, Middle Aged, RNA, Messenger, Gene Expression Regulation, Enzymologic, Mitogen-Activated Protein Kinase 1, Mitogen-Activated Protein Kinases, Mitogen-Activated Protein Kinase 3

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