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Updated: Jul 6, 2026

Assessment of Sarcoplasmic Reticulum Calcium Reserve and Intracellular Diastolic Calcium Removal in Isolated Ventricular Cardiomyocytes
Published on: September 18, 2017
Myocardial sarcoplasmic reticulum Ca2+ ATPase function is increased by aerobic interval training
Ole Johan Kemi1, Marcello Ceci, Gianluigi Condorelli
1Institute of Biomedical and Life Sciences, University of Glasgow, UK. o.kemi@bio.gla.ac.uk
Aerobic interval training enhances cardiac sarcoplasmic reticulum Ca ATPase-2a (SERCA-2a) activity by 30%. This improved SERCA-2a performance contributes to better myocardial calcium handling after exercise.
Area of Science:
- Cardiovascular Physiology
- Exercise Science
- Molecular Cardiology
Background:
- Reduced sarcoplasmic reticulum Ca ATPase-2a (SERCA-2a) activity is linked to myocardial dysfunction.
- Exercise training is known to improve cardiac function, but its specific effects on SERCA-2a are not fully understood.
Purpose of the Study:
- To investigate the impact of aerobic interval training on SERCA-2a activity in the heart.
- To determine if enhanced SERCA-2a function contributes to improved myocardial calcium handling post-exercise.
Main Methods:
- Developed specific protocols to measure SERCA-2a function by assessing calcium uptake in cardiomyocytes.
- Compared SERCA-2a activity in mice subjected to aerobic interval training against sedentary controls.
Main Results:
- Established reliable methods for assessing SERCA-2a function.
- Demonstrated a 30% increase in the maximal rate of Ca uptake in cardiomyocytes following aerobic interval training.
- Observed a reduced phospholamban-to-SERCA-2a ratio, partially explaining the enhanced Ca uptake.
Conclusions:
- Aerobic interval training significantly improves myocardial SERCA-2a performance.
- Enhanced SERCA-2a activity is a key mechanism contributing to improved myocardial calcium handling after exercise training.
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