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Monoamine metabolites in cerebrospinal fluid of depressed patients during treatment with mianserin or amitriptyline



Monoamine metabolites in cerebrospinal fluid of depressed patients during treatment with mianserin or amitriptyline



Journal of Affective Disorders 4(3): 219-226



A group of 20 inpatients with moderate to severe primary affective disorder received 14 days of placebo treatment and were then randomly allocated to receive mianserin 10 mg 3 times daily or identical amitriptyline 25 mg 3 times daily for 1 week followed by 60 mg mianserin or 150 mg amitriptyline daily for a second week. Patients were rated for side-effects and depression (Hamilton Depression Scale) on days 0, 7, 14, 21 and 28. Probenecid 100 mg/kg was administered in 3 divided doses on days 13/14 and on days 27/28 of the trial, followed by collection of CSF. Blood samples for determination of antidepressant levels were collected on day 27. Both mianserin and amitriptyline produced a significant decrease in CSF levels of 3-methoxy-4-hydroxyphenylglycol (MHPG), but only amitriptyline significantly lowered CSF levels of 5-hydroxyindole-3-acetic acid (5-HIAA). Neither drug affected CSF levels of homovanillic acid (HVA). Both mianserin and amitriptyline produced significant but indistinguishable improvement in mean Hamilton scores over 2 weeks of treatment. There was no relationship between therapeutic response and either plasma antidepressant levels or pre-treatment CSF monoamine metabolite levels in his small group of patients. The reductions of CSF levels of metabolites of NA (MHPG) and 5-HT (5-HIAA) are consistent with the known effects of amitriptyline on amine uptake. Mianserin may reduce CSF MHPG levels as a result of its effects upon NA release and/or uptake, but it appears to be devoid of influence upon central 5-HT metabolism.

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Accession: 043676395

Download citation: RISBibTeXText

PMID: 6182175

DOI: 10.1016/0165-0327(82)90006-4


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