Key result
Nitroglycerin relaxed canine coronary arterial smooth muscle contracted by high KCl without reducing the increased intracellular Ca2+ concentration, shifting the Ca2+-force curve to the right.
Population
Canine coronary arterial smooth muscle cells
Comparison
Nitroglycerin vs Control conditions (absence of nitroglycerin)
Design
Preclinical
Authors
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Suggests calcium desensitization aids coronary relaxation; hypothesis-generating for human translation.
Nitroglycerin induces vasorelaxation in coronary arteries through mechanisms independent of reducing intracellular calcium, likely via decreased myosin light chain phosphorylation.
Yanagisawa et al. (1989) studied Canine coronary arterial smooth muscle cells. Nitroglycerin vs. Control (high KCl-PSS without nitroglycerin) was evaluated on Changes in cytoplasmic Ca2+ concentration and force. Nitroglycerin relaxed canine coronary arterial smooth muscle contracted by high KCl without reducing the increased intracellular Ca2+ concentration, shifting the Ca2+-force curve to the right.
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