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  • Title: The presence of tyramine and related monoamines in the nerve cord and some other tissues of the lobster, Homarus americanus.
    Author: Juorio AV, Sloley BD.
    Journal: Brain Res; 1988 Mar 22; 444(2):380-2. PubMed ID: 3359304.
    Abstract:
    This report shows the existence of endogenous p-tyramine in the nerve cord and some organs of the lobster. Their concentrations are lower than those of dopamine or 5-hydroxytryptamine. The nerve cord levels of m-tyramine, beta-phenylethylamine and tryptamine are much lower than those of the phenolic or catecholic amines. The finding that the administration of an aromatic-L-amino acid decarboxylase inhibitor leads to a decrease of p-tyramine gives further evidence that this amine is synthesized from p-tyrosine, which is also found in high concentrations in the lobster nerve cord. The widespread distribution of p-tyramine in the nervous system and peripheral tissues of the lobster suggests that this amine may have additional roles rather than functioning only as a precursor of p-octopamine.
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