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 Lettjournal_title
Neuroscience lettersauthors
Cox BA,Johnson SWdoi
10.1016/s0304-3940(98)00737-xsubject
Has Abstractpub_date
1998-10-23 00:00:00pages
131-4issue
3eissn
0304-3940issn
1872-7972pii
S030439409800737Xjournal_volume
255pub_type
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