Journal article

Complex involvement of nitric oxide and cGMP at N-methyl-D-aspartic acid receptors regulating gamma-[3H]aminobutyric acid release from striatal slices.

M Møller, NM Jones, PM Beart

Neuroscience Letters | Published : 1995

Abstract

Whilst the depolarization of postsynaptic N-methyl-D-aspartic acid (NMDA) receptors leads to an influx of Ca2+ and subsequent synthesis of nitric oxide (NO), we examined roles for NO at striatal NMDA receptors regulating transmitter release. In superfused rat striatal slices, NMDA-evoked release of gamma-[3H]aminobutyric acid ([3H]GABA) was investigated in the presence of nitrergic drugs. NMDA-induced release of [3H]GABA was attenuated by D-2-aminophosphonopentanoate, tetrodotoxin and omission of Ca2+. L-Arginine enhanced NMDA-evoked release of [3H]GABA, but exogenous NO donors were ineffective. Inhibitors of NO synthase (NG-nitro- and NG-amino-L-arginine) and guanylate cyclase (LY83583) ele..

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