Research paper
The role of cytochrome P450 2D6 in the metabolism of moclobemide

https://doi.org/10.1016/0924-977X(96)00023-5Get rights and content

Abstract

The metabolic fate of moclobemide (Ro 11-1163), a new reversible and selective inhibitor of monoamine oxidase type A (MAO-A), has been assessed in a pilot study in 2 debrisoquine poor metabolizers (PM) and 4 extensive metabolizers (EM) after multiple oral dosings of moclobemide with and without co-medication of dextromethorphan. Absorption and disposition parameters were not different between PM and EM. Concurrent application of dextromethorphan, a selective substrate of CYP2D6, did not affect the pharmacokinetics of moclobemide. These results indicate that the cytochromal isoenzyme CYP2D6 does not play a major role in the metabolic degradation of moclobemide. Limited CYP2D6 activities because of a genetic defect or co-medications with CYP2D6 substrates should therefore not give rise to elevated moclobemide blood levels.

References (32)

  • S. Cholerton et al.

    The role of individual human cytochromes P450 in drug metabolism and clinical response

    Trends Pharmacol. Sci.

    (1992)
  • R. Geschke et al.

    Determination of the monoamine oxidase inhibitor moclobemide and three of its metabolites in biological fluids by high-performance liquid chromatography

    J. Chromatogr.

    (1987)
  • G. Alvan

    Clinical consequences of polymorphic drug oxidation

    Fundam. Clin. Pharmacol.

    (1991)
  • R. Amrein et al.

    Interactions of moclobemide with concomitantly administered medication: evidence from pharmacological and clinical studies

    Psychopharmacology

    (1992)
  • C. Audebert et al.

    Influence of food on the tyramine pressor effect during chronic moclobemide treatment of healthy volunteers

    Eur. J. Clin. Pharmacol.

    (1992)
  • P. Balant et al.

    Relevance of genetic polymorphism in drug metabolism in the development of new drugs

    Eur. J. Clin. Pharmacol.

    (1989)
  • P. Baumann et al.

    Pharmacogenetic investigations in moclobemide (MOCL) + thioridazine (THD) vs MOCL + placebo treated depressive patients

    Neuropsychopharmacology

    (1994)
  • K. Brøsen

    The pharmacogenetics of the selective serotonin reuptake inhibitors

    Clin. Invest.

    (1993)
  • M. Da Prada et al.

    A specific and short-acting MAO inhibitor with antidepressant properties

  • M. Da Prada et al.

    Neurochemical profile of moclobemide, a short-acting and reversible inhibitor of monoamine oxidase type A1

    J. Pharmacol. Exp. Ther.

    (1989)
  • F. Derenne et al.

    Debrisoquine oxidative phenotyping and psychiatric drug treatment

    Eur. J. Clin. Pharmacol.

    (1989)
  • J. Dingemanse

    An update of recent moclobemide interaction data

    Int. Clin. Psychopharmacol.

    (1993)
  • N. Feifel et al.

    Role of cytochrome P4502D6 in the metabolism of brofaromine

    Eur. J. Clin. Pharmacol.

    (1993)
  • F.J. Gonzales

    Human cytochromes P450: problems and prospects

    Trends Pharmacol. Sci.

    (1992)
  • F.J. Gonzales et al.

    Characterization of the common genetic defect in humans deficient in debrisoquine metabolism

    Nature

    (1988)
  • L.F. Gram et al.

    Moclobemide treatment causes a substantial rise in the sparteine metabolic ratio

    Br. J. Clin. Pharmacol.

    (1993)
  • Cited by (24)

    View all citing articles on Scopus
    View full text