Key result
Exercise and pharmacological interventions modulate cardiac myosin P-light chain phosphorylation based on heart rate and workload.
Why the study?
The study aimed to determine whether cardiac myosin light chain 2 phosphorylation varies with changes in cardiovascular functional state induced by exercise or pharmacological intervention.
Population
Adult female Sprague-Dawley rats
Comparison
Treadmill exercise and pharmacological intervention vs normal-rest group
Design
Preclinical experimental study
Authors
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Hypothesis-generating in rodents; leaves open translation to human cardiac contractility or exercise therapies.
Effect estimate: -9% to +23% change
p-value: p=<0.05
Cardiac myosin light chain 2 phosphorylation is modulated by heart rate and workload, potentially augmenting left ventricular pressure development.
Fitzsimons et al. (1989) studied this question. Treadmill exercise and pharmacological intervention vs. Normal-rest group was evaluated on Percent myosin P-light chain phosphorylation (-9% to +23% change, p=<0.05). Treadmill exercise and pharmacological interventions modulated cardiac myosin P-light chain phosphorylation (-9% to +23% change, P<0.05) in a heart rate- and work load-dependent manner.
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