Yumi Noguchi

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Luminal hydrogen sulfide (H(2)S), a gasotransmitter, causes colonic pain / referred hyperalgesia in mice, most probably via activation of T-type Ca(2+) channels. Here we analyzed the mechanisms for H(2)S-induced facilitation of colonic pain signals. Intracolonic administration of NaHS, an H(2)S donor, evoked visceral pain-like nociceptive behavior and(More)
Strychnine at concentrations of 0.1 approximately 1.0 microM induced supersensitivity of rat vas deferens to alpha-agonists but not to other stimulants. Strychnine-treatment resulted in an increase in the number of alpha-adrenoceptors, determined by measuring the binding of [3H]prazosin. Glycine did not have any significant effect on the contracture and did(More)
The effects of dibutyryl cyclic GMP (db-cGMP) and dibutyryl cyclic AMP (db-cAMP) on potassium-stimulated 45Ca uptake by cortical slices of rat brain were investigated. db-cGMP specifically inhibited the initial rate of potassium-stimulated 45Ca uptake in a dose-dependent manner. Our findings supported the suggestion that cyclic GMP may play a regulatory(More)
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