Key result
Beta-adrenoceptor stimulation increases Ca2+ wave frequency ~111% in failing post-infarction rat cardiomyocytes versus sham controls.
Why the study?
Does beta-adrenoceptor stimulation reveal altered Ca2+ homeostasis in left ventricular cardiomyocytes from post-infarction rats with and without heart failure?
Population
Left ventricular cardiomyocytes from rats six weeks after myocardial infarction and sham-operated controls
Comparison
Beta-adrenoceptor stimulation vs Baseline conditions and sham-operated controls
Design
Preclinical
Follow-up
6 weeks post-myocardial infarction
Authors
Loading...
Supports early Ca2+ dysregulation research post-MI; leaves open human translation before any clinical implications.
Does beta-adrenoceptor stimulation reveal altered Ca2+ homeostasis in left ventricular cardiomyocytes from post-infarction rats with and without heart failure?
Absolute Event Rate: 0.97% vs 0.46%
p-value: p=<0.05
Beta-adrenoceptor stimulation unmasks decreased sarcoplasmic reticulum Ca2+ content and increased propensity for diastolic Ca2+ release in ventricular cardiomyocytes from rats with large myocardial infarctions, even prior to the development of overt heart failure.
Sadredini et al. (2016) studied Myocardial infarction and heart failure. Isoprenaline (beta-adrenoceptor stimulation) vs. Sham-operated controls was evaluated on Ca2+ wave frequency (waves/10 s) (p=<0.05). Beta-adrenoceptor stimulation increased Ca2+ wave frequency to 0.97 waves/10s in failing and 1.10 in non-failing post-infarction rat cardiomyocytes compared to 0.46 in sham controls.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: