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  • 1
    ISSN: 1432-2072
    Keywords: Alcoholics ; Harman ; Trace amines ; β-carbolines ; Liver histology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Based on the hypothesis of a relationship between the concentration of trace amines like tetrahydroisoquinolines (TIQ's) and β-carbolines (BC's) in the brain and an increased voluntary ingestion of ethanol, the concentrations of ethanol, acetaldehyde and harman (a β-carboline) were examined in a group of 20 alcoholics. The patients excreted a higher amount of harman into the urine than non-alcoholics on the day of admission (harman-1) as well as at the end of the detoxication period, 14 days later (harman-14). Certain factors were related to the increased excretion of harman by alcoholics: The younger the patient when he/she consumed ethanol for the first time, the higher the concentration of acetaldehyde in the blood and the amount of harman (harman-14) excreted in the urine. Furthermore, the younger the patient when he/she was intoxicated with ethanol for the first time the higher the amount of harman (harman-14) in the urine. Patients with first grade relatives who were alcoholics excreted more harman (harman-14) than those without such relatives. The following variables were not related to harman-14: The average amount of ethanol consumed daily during the 6 months prior to admission, the presence of signs of intoxication and symptoms of withdrawal at admission to hospital, and the consumption of other psychotropic substances. A negative correlation was found between the state of the liver, as assessed by liver histology and γ-glutamate transferase (γ-GT) levels, and the concentration of harman in the urine. Thus, some events in the patient's history as well as the state of the liver are important for the increased excretion of harman into urine of alcoholics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 327 (1984), S. 107-113 
    ISSN: 1432-1912
    Keywords: Ethanol ; Harman ; Rat brain ; Regional distribution ; Urine ; Withdrawal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Harman occurs in rat brain, with the highest concentration in the cerebellum and the lowest in the striatum. 2 g/kg ethanol were ineffective with respect to the concentration of harman in the brain whereas 5 g/kg ethanol caused a time-dependent increase in the cerebral cortex as well as the cerebellum. A toxic dose (8 g/kg) of ethanol elicited no change of harman in the brain 3 h following the application. The rise in the harman concentration in the brain did not correlate with the increase of acetaldehyde in the blood after treatment with ethanol suggesting that several mechanisms are involved in the changes of the levels of harman. In subchronic experiments rats were treated with ethanol over a period of 5 or 6 days. Harman increased in the brain whereby the effect seemed to be more pronounced in the cerebellum than in the cerebral cortex. The concentration tended to increase over time and reached control levels again during withdrawal. The time course of the excretion of harman into the urine was similar to that of the brain in that it increased continuously during the period of ethanol treatment and reached control levels again during with-drawal.
    Type of Medium: Electronic Resource
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