Summary
Contrary to prediction, loading rats with tryptamine, tryptophan or methanol failed to produce any rise in endogenous monoamine oxidase inhibitor output, whilst ethanol administration resulted in a significantly decreased excretion. These findings, which provide no support for the hypothesis that the inhibitor is aβ-carboline, may shed some light on the tranquillizing effect of ethanol in man.
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References
Airaksinen, M. M., Kari, I.:β-Carbolines, psychoactive compounds in the mammalian body. Med. Biol.59, 21–34 (1981).
Bhattacharya, S. K., Glover, V., Sandler, M., Clow, A., Topham, A., Bernadt, M., Murray, R.: Raised endogenous monoamine oxidase inhibitor output in postwithdrawal alcoholics: effects of L-dopa and ethanol. Biol. Psychiat.17, 829–836 (1982).
Glover, V., Bhattacharya, S. K., Sandler, M., File, S. E.: Benzodiazepines reduce stress-augmented increase in rat urine monoamine oxidase inhibitor. Nature (Lond.)292, 347–349 (1981).
Glover, V., Reveley, M. A., Sandler, M.: A monoamine oxidase inhibitor in human urine. Biochem. Pharmac.29, 467–470 (1980).
Honecker, H., Rommelspacher, H.: Tetrahydronorharmane (tetrahydro-β-carboline) a physiologically occurring compound of indole metabolism. Naunyn-Schmiedeberg's Arch. Pharmac.305, 135–141 (1978).
Petursson, H., Bhattacharya, S. K., Glover, V., Sandler, M., Lader, M. H.: Urinary monoamine oxidase inhibitor and benzodiazepine withdrawal. Br. J. Psychiat.140, 7–10 (1982).
Petursson, H., Reveley, M. A., Glover, V., Sandler, M.: Urinary MAO inhibitor in psychiatric illness. Psychiat. Res.5, 335–340 (1981).
Peura, P., Kari, I., Airaksinen, M. M.: Identification by selective ion monitoring of 1-methyl-1,2,3,4-tetrahydro-β-carboline in human platelets and plasma after ethanol intake. Biomed. Mass. Spectrom.7, 553–555 (1980).
Rommelspacher, H., Strauss, S., Lindemann, J.: Excretion of tetrahydroharmane and harmane into the urine of man and rat after a load with ethanol. FEBS Letts.109, 209–212 (1980).
Sandler, M., Glover, V., Elsworth, J. D., Lewinsohn, R., Reveley, M. A.: Monoamine oxidase and its inhibition: some clinical implications. In: Monoamine Oxidase: Structure, Function, and Altered Functions (Singer, T. P., von Korff, R. W., Murphy, D. L., eds.), pp. 447–456. New York: Academic Press. 1979.
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Armando, I., Glover, V., Sandler, M. et al. Output of endogenous monoamine oxidase inhibitor in rats: Effect of ethanol, tryptamine and tryptophan. J. Neural Transmission 56, 85–90 (1983). https://doi.org/10.1007/BF01243376
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DOI: https://doi.org/10.1007/BF01243376