Abstract
Following the administration of theanine, the brain tryptophan content significantly increased or tended to increase, but the contents of serotonin and 5-hydroxyindole acetic acid (5HIAA) decreased. The use of inhibitors of serotonin metabolism enable us to speculate that theanine reduced serotonin synthesis and also increased serotonin degradation in the brain.
MeSH terms
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Animals
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Brain Chemistry / drug effects*
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Fenclonine / pharmacology
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Glutamates / pharmacology*
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Hydroxyindoleacetic Acid / metabolism
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Male
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Monoamine Oxidase Inhibitors / pharmacology
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Pargyline / pharmacology
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Rats
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Rats, Wistar
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Serotonin / metabolism*
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Serotonin Antagonists / pharmacology
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Tryptophan / metabolism
Substances
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Glutamates
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Monoamine Oxidase Inhibitors
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Serotonin Antagonists
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Serotonin
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Hydroxyindoleacetic Acid
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theanine
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Tryptophan
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Pargyline
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Fenclonine