Key result
Alpha-adrenoceptor stimulation increased Ca2+ transient amplitude in diabetic rat cardiomyocytes but not controls, whereas beta-adrenoceptor stimulation produced less potentiation in diabetic cells.
Why the study?
Does alpha- and beta-adrenoceptor stimulation alter intracellular Ca2+ handling in cardiac myocytes from streptozotocin-induced diabetic rats compared to controls?
Population
Cardiac myocytes from streptozotocin-induced diabetic rats
Comparison
Alpha-adrenoceptor agonist and beta-adrenoceptor… vs Cardiac myocytes from control rats
Design
Preclinical
Authors
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Differential adrenoceptor effects on Ca2+ transients in diabetic rat myocytes may reflect compensation; leaves open human translation and therapeutic relevance.
Does alpha- and beta-adrenoceptor stimulation alter intracellular Ca2+ handling in cardiac myocytes from streptozotocin-induced diabetic rats compared to controls?
Diabetic cardiomyocytes exhibit a heightened response to alpha-adrenoceptor stimulation and a diminished response to beta-adrenoceptor stimulation, suggesting a potential compensatory mechanism for impaired contractility.
Ha et al. (1999) studied streptozotocin-induced diabetes. alpha- and beta-adrenoceptor stimulation vs. control cardiomyocytes was evaluated on intracellular Ca2+ transient amplitude and duration. Alpha-adrenoceptor stimulation increased Ca2+ transient amplitude in diabetic rat cardiomyocytes but not controls, whereas beta-adrenoceptor stimulation produced less potentiation in diabetic cells.