Cited by 228Cardiac Ischemia and ReperfusionCardiomyopathy and Myosin StudiesCardiac Fibrosis and Remodeling

Transgenic Mouse Model of Stunned Myocardium

Murphy, Anne M., Kögler, Harald, Georgakopoulos, Dimitrios, McDonough, Jason L., Kass, David A., Van Eyk, Jennifer E., Marbán, Eduardo·2000·Science

Abstract

Stunned myocardium is a syndrome of reversible contractile failure that frequently complicates coronary artery disease. Cardiac excitation is uncoupled from contraction at the level of the myofilaments. Selective proteolysis of the thin filament protein troponin I has been correlated with stunned myocardium. Here, transgenic mice expressing the major degradation product of troponin I (TnI 1–193 ) in the heart were found to develop ventricular dilatation, diminished contractility, and reduced myofilament calcium responsiveness, recapitulating the phenotype of stunned myocardium. Proteolysis of troponin I also occurs in ischemic human cardiac muscle. Thus, troponin I proteolysis underlies the pathogenesis of a common acquired form of heart failure.

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Crossref · 10.1126/science.287.5452.488

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31 of 31 references verified0 citation errors · 0 not checkable

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  • cTnI proteoforms arising from various PTMs can provide new insights to the molecular mechanisms underlying cardiovascular diseases.

    “Recent studies have shown that cTnI is heavily modified and its proteoforms arising from various PTMs can provide new insights to the molecular mechanisms underlying cardiovascular diseases27–31.”

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Authors
Murphy, A. M., Kögler, H., Georgakopoulos, D., McDonough, J. L., Kass, D. A., Van Eyk, J. E., & Marbán, E.
Affiliations
  • Department of Pediatrics,
  • Institute of Molecular Cardiobiology, and
  • Johns Hopkins University (US)
  • Queen's University (CA)
  • Departments of Biochemistry and Physiology, Queen's University, 429 Botterell Hall, Kingston, Ontario, Canada K7L 3W6.
Corresponding author
Murphy, Anne M.
Venue
Science
Published
2000-01-21
Volume
287
Issue
5452
Pages
488-491
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W1994543305
Cited by
228
References
31
Citations by year
2025: 3 · 2024: 2 · 2023: 2 · 2022: 1 · 2021: 6 · 2020: 3 · 2019: 2 · 2018: 3 · 2017: 1 · 2016: 6 · 2015: 2 · 2014: 7 · 2013: 4 · 2012: 3
FWCI
17.46
Type
journal article
Language
en
Open access
closed
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Heart, Lung, and Blood Institute (HL-44065, HL-63038, R01HL044065)
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Cardiac Ischemia and Reperfusion
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiomyopathy and Myosin Studies
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Fibrosis and Remodeling
Keywords
myocardial stunning, heart failure, ventriculomegaly, myofilament calcium responsiveness, transgenic mouse model, myocardial ischemia, coronary artery disease
MeSH terms
Adrenergic beta-Agonists, Animals, Calcium, Dilatation, Pathologic, Disease Models, Animal, Cardiomegaly, Heart Rate, Heart Ventricles, Humans, Isoproterenol, Mice, Inbred C57BL, Mice, Transgenic, Actin Cytoskeleton, Myocardial Contraction, Myocardium, Myofibrils, Ventricular Function, Left, Myocardial Stunning, Troponin I, Mice

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