Nitric oxide facilitates N-methyl-D-aspartate-induced burst firing in dopamine neurons from rat midbrain slices.

Abstract:

:Dopamine (DA) neurons in the ventral tegmental area and substantia nigra pars compacta were induced to fire in bursts with application of N-methyl-D-aspartate (NMDA, 20 microM) and apamin (100 nM) while recording intracellularly in the rat brain slice. L-Arginine (300 microM), a substrate for nitric oxide (NO) production, increased both the number of spikes per burst and the magnitude of interburst hyperpolarizations. Nitric oxide synthase inhibitors N-nitro-L-arginine methyl ester (L-NAME, 100 microM), N-nitro-L-arginine, and 7-nitroindazole inhibited NMDA-induced burst firing by reducing the number of spikes per burst. Moreover, L-arginine (100 microM) reversed the inhibition of burst firing produced by L-NAME. These findings suggest that NO facilitates NMDA-induced burst firing in DA neurons.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Cox BA,Johnson SW

doi

10.1016/s0304-3940(98)00737-x

subject

Has Abstract

pub_date

1998-10-23 00:00:00

pages

131-4

issue

3

eissn

0304-3940

issn

1872-7972

pii

S030439409800737X

journal_volume

255

pub_type

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