PMID- 8923574 OWN - NLM STAT- MEDLINE DCOM- 19970325 LR - 20190726 IS - 0033-3158 (Print) IS - 0033-3158 (Linking) VI - 127 IP - 4 DP - 1996 Oct TI - Initial monoamine oxidase-A inhibition by moclobemide does not predict the therapeutic response in patients with major depression. A double blind, randomized study. PG - 370-6 AB - It is generally accepted that the clinical efficacy of monoamine oxidase inhibitors (MAOI) is related to inhibition of this enzyme. In order to evaluate the predictive ability of monoamine oxidase-A inhibition for therapeutic efficacy, the start of treatment effects of moclobemide, a selective, reversible monoamine oxidase-A inhibitor, on plasma concentrations of monoamines and monoamine metabolites were determined. The plasma levels of 3,4-dihydroxyphenylglycol (DHPG, deaminated metabolite of noradrenaline), 5-hydroxyindoleacetic acid (5-HIAA, deaminated metabolite of serotonin), 3,4-dihydroxyphenylacetic acid and homovanillic acid (DOPAC and HVA, deaminated metabolites of dopamine), L-dihydroxyphenylalanine (L-dopa) and noradrenaline were investigated and related to treatment outcome. This was a randomized double blind parallel group study in 47 patients with criteria of major depression according to DSM III R. Moclobemide 300 mg/day, 450 mg/day or 600 mg/day was administered continuously for 6 weeks. Plasma concentrations of monoamine metabolites and monoamines were determined just before treatment by moclobemide, 4 h after the first dose, 24 h after the first dose, before the first dose on day 7, and 4 h after the first dose, on day 7. Each moclobemide dose improved depression as measured by MADRS (Montgomery-Asberg Depression Rating scale) but there was no difference between the three doses. Moclobemide dose-dependently reduced plasma concentration of DHPG, L-dopa and HVA. No dose-dependent treatment effect was observed for plasma 5-HIAA, noradrenaline and DOPAC. The clinical outcome as defined by the final MADRS score was not related to any start of treatment changes in plasma monoamine metabolites reflecting inhibition of MAO-A. It is concluded that monoamine oxidase-A inhibition at the beginning of the treatment does not predict clinical outcome. FAU - Radat, F AU - Radat F AD - Department of Psychiatry, Hopital Saint Antoine, Paris, France. FAU - Berlin, I AU - Berlin I FAU - Spreux-Varoquaux, O AU - Spreux-Varoquaux O FAU - Elatki, S AU - Elatki S FAU - Ferreri, M AU - Ferreri M FAU - Puech, A J AU - Puech AJ LA - eng PT - Clinical Trial PT - Comparative Study PT - Journal Article PT - Randomized Controlled Trial PL - Germany TA - Psychopharmacology (Berl) JT - Psychopharmacology JID - 7608025 RN - 0 (Antidepressive Agents) RN - 0 (Benzamides) RN - 0 (Biomarkers) RN - 0 (Monoamine Oxidase Inhibitors) RN - 102-32-9 (3,4-Dihydroxyphenylacetic Acid) RN - 534-82-7 (Methoxyhydroxyphenylglycol) RN - 54-16-0 (Hydroxyindoleacetic Acid) RN - PJ0Y7AZB63 (Moclobemide) RN - UEH9K539KJ (3,4-dihydroxyphenylglycol) SB - IM MH - 3,4-Dihydroxyphenylacetic Acid/blood MH - Adult MH - Antidepressive Agents/*therapeutic use MH - Benzamides/*therapeutic use MH - Biomarkers/blood MH - Depressive Disorder/blood/*drug therapy MH - Double-Blind Method MH - Female MH - Humans MH - Hydroxyindoleacetic Acid/blood MH - Male MH - Methoxyhydroxyphenylglycol/analogs & derivatives/blood MH - Middle Aged MH - Moclobemide MH - Monoamine Oxidase Inhibitors/*therapeutic use EDAT- 1996/10/01 00:00 MHDA- 1996/10/01 00:01 CRDT- 1996/10/01 00:00 PHST- 1996/10/01 00:00 [pubmed] PHST- 1996/10/01 00:01 [medline] PHST- 1996/10/01 00:00 [entrez] AID - 10.1007/s002130050100 [doi] PST - ppublish SO - Psychopharmacology (Berl). 1996 Oct;127(4):370-6. doi: 10.1007/s002130050100.