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Related Experiment Video

Updated: Jul 20, 2026

Surgical Swine Model of Chronic Cardiac Ischemia Treated by Off-Pump Coronary Artery Bypass Graft Surgery
09:12

Surgical Swine Model of Chronic Cardiac Ischemia Treated by Off-Pump Coronary Artery Bypass Graft Surgery

Published on: March 27, 2018

Mitochondrial adaptations within chronically ischemic swine myocardium.

Edward O McFalls1, Wim Sluiter, Kees Schoonderwoerd

  • 1Experimental Cardiology, Thoraxcenter, Cardiovascular Research School COEUR, Erasmus MC, Rotterdam, The Netherlands. mcfal001@tc.umn.edu

Journal of Molecular and Cellular Cardiology
|August 24, 2006
PubMed
Summary

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Mitochondria in chronically ischemic heart tissue develop a protective, stress-resistant state. This adaptation involves reduced superoxide generation and increased uncoupling protein 2, preserving function after anoxia.

Area of Science:

  • Cardiovascular Biology
  • Mitochondrial Physiology

Background:

  • Myocardial ischemic preconditioning confers mitochondrial stress resistance, reducing cell death.
  • The adaptive capacity of mitochondria in chronically ischemic myocardium remains incompletely understood.

Purpose of the Study:

  • To investigate whether mitochondria in chronically ischemic myocardium acquire a protective phenotype.
  • To characterize mitochondrial function and adaptive mechanisms in a swine model of chronic myocardial ischemia.

Main Methods:

  • A swine model with chronic left anterior descending artery stenosis was established.
  • Mitochondria were isolated from ischemic and remote myocardial regions for respiration assessment (State 2 and State 3).
  • Superoxide generation and uncoupling protein (UCP) expression (UCP2, UCP3) were analyzed.

Related Experiment Videos

Last Updated: Jul 20, 2026

Surgical Swine Model of Chronic Cardiac Ischemia Treated by Off-Pump Coronary Artery Bypass Graft Surgery
09:12

Surgical Swine Model of Chronic Cardiac Ischemia Treated by Off-Pump Coronary Artery Bypass Graft Surgery

Published on: March 27, 2018

Main Results:

  • Mitochondria from the ischemic region exhibited preserved State 3 respiration post-anoxia/reoxygenation compared to remote regions.
  • Superoxide generation was significantly lower in mitochondria from the ischemic myocardium.
  • Uncoupling protein 2 expression was elevated in mitochondria from the ischemic region.

Conclusions:

  • Mitochondria in chronically ischemic myocardium adopt a stress-resistant phenotype.
  • This protective state is characterized by reduced superoxide production and enhanced uncoupling protein 2 expression.
  • These adaptations may contribute to improved mitochondrial resilience in chronic ischemic heart disease.