Related Experiment Video
Updated: May 8, 2026
Ultrasound-Guided Induced Pluripotent Stem Cell-Derived Cardiomyocyte Implantation in Myocardial Infarcted Mice
Published on: March 30, 2022
Cardiomyocyte-specific ablation of CD36 improves post-ischemic functional recovery
Jeevan Nagendran1, Thomas Pulinilkunnil, Petra C Kienesberger
1Cardiovascular Research Centre, Department of Pediatrics, Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; Division of Cardiac Surgery, Department of Surgery, Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alberta, Canada.
Reducing fatty acid oxidation (FAO) by inhibiting CD36 in heart cells improves cardiac efficiency and recovery after ischemia/reperfusion injury. This targeted approach shows therapeutic potential for heart protection.
Area of Science:
- Cardiology
- Metabolic Physiology
- Molecular Biology
Background:
- Pre-clinical studies suggest inhibiting myocardial fatty acid oxidation (FAO) may prevent ischemia/reperfusion (I/R) injury.
- Controversy exists due to conflicting results in whole-body CD36 knockout mice, highlighting limitations in studying cardiomyocyte-specific roles.
Purpose of the Study:
- To investigate the role of cardiomyocyte CD36 in regulating FAO and post-ischemic functional recovery.
- To generate an inducible and cardiomyocyte-specific CD36 knockout (icCD36KO) mouse model for precise investigation.
Main Methods:
- Generation of an inducible and cardiomyocyte-specific CD36 knockout (icCD36KO) mouse model.
- Assessment of fatty acid (FA) uptake, intramyocardial triacylglycerol content, and cardiac energy metabolism via ex vivo working heart perfusions.
- Evaluation of cardiac functional recovery following ischemia/reperfusion (I/R) in icCD36KO and control mice.
Main Results:
- icCD36KO mice exhibited significantly decreased FA uptake and reduced intramyocardial triacylglycerol content.
- Reduced FAO rates in icCD36KO hearts were compensated by enhanced glucose oxidation.
- Hearts from icCD36KO mice showed significantly improved functional recovery post-I/R, associated with increased cardiac efficiency.
Conclusions:
- Diminished CD36-mediated FA uptake and subsequent reduction in FAO improve post-ischemic cardiac efficiency and functional recovery.
- Targeting cardiomyocyte FA uptake via CD36 inhibition may offer therapeutic benefits for myocardial I/R injury.
