Key result
cAMP agents relax noradrenaline-induced guinea-pig contractions by lowering nifedipine-insensitive Ca2+ influx.
Why the study?
The mechanisms underlying cyclic AMP-mediated relaxation of noradrenaline-induced contraction and calcium influx in guinea-pig vas deferens were not fully understood.
Population
Guinea-pig vas deferens (epididymal side)
Comparison
Cyclic AMP-increasing agents vs control on NA-induced contraction
Design
Preclinical experimental study
Authors
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Hypothesis-generating for cAMP effects on Ca2+ influx in smooth muscle; leaves open translation to human vas deferens or therapy.
An increase in intracellular cAMP may relax noradrenaline-induced contraction by attenuating a nifedipine-insensitive Ca2+ influx.
Kato et al. (2000) studied this question. Cyclic AMP-increasing agents (forskolin, IBMX, caffeine) was evaluated on Relaxation of noradrenaline-induced contraction and intracellular calcium concentration. Cyclic AMP-increasing agents relaxed noradrenaline-induced contractions in guinea-pig vas deferens by attenuating nifedipine-insensitive Ca2+ influx.
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