Key result
Alpha-adrenergic stimulation of adult rat ventricular cardiocytes with phenylephrine significantly increased NCX mRNA (2.5-fold) and protein levels (1.8-fold).
Why the study?
Does alpha-adrenergic stimulation up-regulate NCX expression in adult rat ventricular cardiocytes?
Population
Adult rat ventricular cardiocytes (ARC) isolated from male Sprague-Dawley rats
Comparison
Alpha-adrenergic stimulation with 10 microM… vs Unstimulated cells or cells treated with alpha…
Design
Preclinical
Follow-up
24 hours
Authors
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May link α-adrenergic signaling to Ca²⁺ dysregulation in hypertrophy; hypothesis-generating for human HF.
Does alpha-adrenergic stimulation up-regulate NCX expression in adult rat ventricular cardiocytes?
Effect estimate: 2.5-fold increase in mRNA, 1.8-fold increase in protein
Alpha-adrenergic stimulation up-regulates the expression of the sarcolemmal Na+/Ca2+-exchanger in adult rat ventricular cardiocytes, suggesting a mechanism for altered Ca2+ homeostasis in cardiac hypertrophy.
Hans Reinecke (1997) studied Cardiac hypertrophy model. Phenylephrine vs. Control was evaluated on NCX mRNA and protein level expression (2.5-fold increase in mRNA, 1.8-fold increase in protein). Alpha-adrenergic stimulation of adult rat ventricular cardiocytes with phenylephrine significantly increased NCX mRNA (2.5-fold) and protein levels (1.8-fold).
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