Evidence that adrenergic and cholinergic but not capsaicin-sensitive nerves are involved in the nerve-mediated contraction of the guinea pig seminal vesicle.

Abstract:

BACKGROUND/AIMS:The neurotransmitters participating in the nerve-mediated contraction of the guinea pig seminal vesicle (GPSV) have not been firmly established. There is debate as to the mediating role of norepinephrine and acetylcholine. METHODS:We have used longitudinally and circularly oriented strips of GPSV and activated their intramural nerves by electrical field stimulation (5 and 10 Hz for 30 s). RESULTS:Contractile responses to stimulation were enhanced by a cholinesterase inhibitor and reduced by the adrenergic α-receptor antagonist phentolamine (2.5 μmol/l). Atropine (1 μmol/l) significantly reduced responses in longitudinal preparations; a less consistent inhibition was found in circular preparations. The sensory neuron stimulant and blocker capsaicin was without effect. CONCLUSIONS:It is concluded that adrenergic nerves and also acetylcholine mediate the contractile response of the GPSV.

journal_name

Pharmacology

journal_title

Pharmacology

authors

Benko R,Szombati V,Bartho L

doi

10.1159/000351847

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

39-42

issue

1-2

eissn

0031-7012

issn

1423-0313

pii

000351847

journal_volume

92

pub_type

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