5-HYDROXYTRYPTAMINE METABOLISM BY THE NUCLEAR FRACTION OF RAT-LIVER HOMOGENATE.
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ABSTRACT: 1. The metabolism of 5-hydroxy[1'-(14)C]tryptamine creatinine sulphate in the nuclear fraction of rat-liver homogenate was studied. In the incubation mixture five metabolites were found. 2. Two metabolites were not radioactive; one of them was identified as 5-hydroxyindole-3-carboxylic acid and the second tentatively as 5-hydroxyindole-3-aldehyde. 3. 5-Hydroxyindol-3-ylacetic acid, 1'-N-acetyl-5-hydroxytryptamine and 5-hydroxytryptophol were not precursors of 5-hydroxyindolealdehyde and 5-hydroxyindolecarboxylic acid. 4. It was shown that the metabolism of 5-hydroxytryptamine in the nuclear fraction involves monoamine oxidase, the precursor of 5-hydroxyindolealdehyde and 5-hydroxyindolecarboxylic acid being most probably 5-hydroxyindol-3-ylacetaldehyde.
SUBMITTER: KVEDER S
PROVIDER: S-EPMC1206536 | biostudies-other | 1965 Feb
REPOSITORIES: biostudies-other
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