Acetylcholine activates a nicotinic receptor and an inward current in dorsal motor nucleus of the vagus neurons in vitro.

Abstract:

:This study examines the effect of acetylcholine (Ach) on parasympathetic vagal neurons in the dorsal motor nucleus of the vagus (DMNX). Patch-clamp techniques were utilized to examine voltage and ligand-gated currents in visualized DMNX neurons in an in vitro slice. Ach (100 microM) activated an inward current, -196.4 +/- 56.9 pA at -80 mV (n = 15) that was accompanied by a decrease in membrane resistance of 48.6 +/- 9.2% in a population of DMNX neurons. The reversal potential for this ligand-gated current was -11.3 +/- 11.5 mV. The specific agonist nicotine (200 microM) elicited similar responses. Nicotine decreased membrane resistance by 60.9 +/- 4.3% and activated an inward current (-215.7 +/- 45.7 pA at -80 mV) that reversed at -12.7 +/- 20.4 mV (n = 16). Bethanecol (100 microM), a specific muscarinic agonist, had no effect. Neither Ach or nicotine had any effect on the voltage-gated sodium and outward potassium currents present in these neurons.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Neff RA,Hansen MK,Mendelowitz D

doi

10.1016/0304-3940(95)11807-9

subject

Has Abstract

pub_date

1995-08-11 00:00:00

pages

163-6

issue

3

eissn

0304-3940

issn

1872-7972

pii

0304394095118079

journal_volume

195

pub_type

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