Predominant myosin superrelaxed state in canine myocardium with naturally occurring dilated cardiomyopathy

Author:

Ochala Julien1ORCID,Lewis Christopher T. A.1ORCID,Beck Thomas1,Iwamoto Hiroyuki2,Hessel Anthony L.34ORCID,Campbell Kenneth S.56ORCID,Pyle W. Glen78ORCID

Affiliation:

1. Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark

2. SPring-8, Japan Synchrotron Radiation Research Institute, Hyogo, Japan

3. Institute of Physiology II, University of Muenster, Muenster, Germany

4. Accelerated Muscle Biotechnologies, Boston, Massachusetts, United States

5. Department of Physiology, University of Kentucky, Lexington, Kentucky, United States

6. Division of Cardiovascular Medicine, University of Kentucky, Lexington, Kentucky, United States

7. IMPART Investigator Team, Dalhousie Medicine, Saint John, New Brunswick, Canada

8. Department of Biomedical Sciences, University of Guelph, Guelph, Ontario, Canada

Abstract

The key finding of the present study is that, in left ventricles of dogs with a naturally occurring dilated cardiomyopathy, relaxed myosin molecules favor a nonsequestered superrelaxed state potentially impairing sarcomeric contractility. This alteration is rescuable by applying a small molecule activating myosin known as EMD-57033.

Funder

Carlsbergfondet

Publisher

American Physiological Society

Subject

Physiology (medical),Cardiology and Cardiovascular Medicine,Physiology

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