Title : Inhibitory effect of neuropeptide Y on adrenergic and cholinergic transmission in rat urinary bladder and urethra.

Pub. Date : 1994 Apr

PMID : 8184986






6 Functional Relationships(s)
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1 In the urethra, NPY (0.02-0.5 microM) decreased the release of [3H]NE in a dose-dependent manner (10-53%). Tritium neuropeptide Y Rattus norvegicus
2 In the bladder base the inhibitory effect of NPY on [3H]NE release was not dose dependent. Tritium neuropeptide Y Rattus norvegicus
3 These observations suggest that 0.5 microM NPY elicits two opposing actions: a direct inhibitory action on adrenergic terminals and an indirect disinhibitory action to eliminate heterosynaptic cholinergic inhibition of [3H]NE release. Tritium neuropeptide Y Rattus norvegicus
4 In both tissues the action of NPY on [3H]NE release was not significantly modified by the alpha-adrenergic blocking agent yohimbine (1 microM). Tritium neuropeptide Y Rattus norvegicus
5 [3H]ACh release in the bladder body was not altered by 0.1 microM NPY but was suppressed (39%) by 1 microM NPY. Tritium neuropeptide Y Rattus norvegicus
6 The effect of NPY (1 microM) on [3H]ACh release was dependent on the frequency of stimulation. Tritium neuropeptide Y Rattus norvegicus