Alteration of Dopamine Synthesis in Rat Striatum Subsequent to Selective Type A Monoamine Oxidase Inhibition
- 1 August 1981
- journal article
- research article
- Published by Wiley in Journal of Neurochemistry
- Vol. 37 (2), 527-530
- https://doi.org/10.1111/j.1471-4159.1981.tb00490.x
Abstract
Pretreatment of rat striatal slices with the selective type A monoamine oxidase (MAO) inhibitor clorgyline was found to produce significant inhibition of dopamine (DA) synthesis. DA synthesis was reduced by nearly 50%, but not until more than 90% of the type A enzyme was inhibited. In contrast, complete inhibition of the type B MAO following deprenyl treatment had no effect. It is suggested that interneuronal accumulation of DA following inhibition of type A MAO leads to feedback inhibition at the rate-limiting step in DA biosynthesis, tyrosine hydroxylation. These results are also consistent with the presence of a type A MAO within DA-containing neurons and provide evidence of a regulatory role for type A MAO in the synthesis of brain DA.Keywords
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