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It was previously determined that the site of action of calcitonin gene-related peptide (CGRP) in cardiomyocytes was predominantly at the sarcolemmal calcium release channel, and studies have shown that CGRP has major effects on intracellular cardiomyocyte calcium concentrations. We postulated that CGRP would have similar effects on striated skeletal muscle and determined the effects of CGRP on calcium...
The purpose of this study is to elucidate the mechanism of action and site of action of calcitonin gene-related peptide (CGRP) and its effects on calcium concentrations in two types of cardiomyocytes, neonatal and adult, by employing real-time fluorescence imaging. CGRP caused an increase in intramyocytic calcium with adult cells, but a decrease with neonates. Treatment of adult myocytes with ouabain...
CGRP has potent cardiovascular effects but its role in heart failure is unclear. Effects of CGRP on calcium concentrations in fresh adult rat cardiomyocytes, cultured adult cardiomyocytes and neonatal cardiomyocytes were determined by real time fluorescence spectrophotometry. Treatment of cultured adult cardiomyocytes with CGRP resulted in a rapid cessation of beating and a reduction in intracellular...
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