Key result
Noradrenaline depolarizes guinea-pig smooth muscle by inhibiting K+ currents via alpha-1-adrenoceptor and PKC activation.
Why the study?
The ionic mechanisms and signal transduction underlying noradrenaline-induced depolarization in guinea-pig vas deferens smooth muscle cells were not fully understood.
Population
Single smooth muscle cells of guinea-pig vas deferens
Comparison
Noradrenaline with and without pharmacological modulators (nifedipine, GDPS, bisindolylmaleimide, TPA)
Design
Preclinical experimental study
Authors
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Animal findings on PKC-mediated K+ inhibition warrant no clinical extrapolation; leaves open validation in human smooth muscle.
Noradrenaline induces depolarization in guinea-pig vas deferens smooth muscle cells via alpha-1-adrenoceptor and PKC-dependent inhibition of K+ currents.
Kamimura et al. (2000) studied this question. Noradrenaline was evaluated on Depolarization and inhibition of K+ currents. Noradrenaline induced depolarization in guinea-pig vas deferens smooth muscle cells by inhibiting K+ currents via alpha-1-adrenoceptor and protein kinase C activation.
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