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Original article| Volume 54, ISSUE 9, P890-895, November 01, 2003

Lack of effect of a single dose of hydrocortisone on serotonin1A receptors in recovered depressed patients measured by positron emission tomography with [11C]WAY-100635

  • Zubin Bhagwagar
    Affiliations
    Clinical Sciences Centre Medical Research Council (ZB, AJM, PMG), Imperial College School of Medicine, Hammersmith Hospital, London, United Kingdom

    University Department of Psychiatry (ZB, PJC), Warneford Hospital, Oxford, United Kingdom
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  • Andrew J. Montgomery
    Affiliations
    Clinical Sciences Centre Medical Research Council (ZB, AJM, PMG), Imperial College School of Medicine, Hammersmith Hospital, London, United Kingdom
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  • Paul M. Grasby
    Correspondence
    Address reprint requests to Professor P.M. Grasby, Medical Research Council, Cyclotron Unit, Imperial College School of Medicine, Hammersmith Hospital, London W12 ONN, United Kingdom.
    Affiliations
    Clinical Sciences Centre Medical Research Council (ZB, AJM, PMG), Imperial College School of Medicine, Hammersmith Hospital, London, United Kingdom
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  • Philip J. Cowen
    Affiliations
    University Department of Psychiatry (ZB, PJC), Warneford Hospital, Oxford, United Kingdom
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      Abstract

      Background

      Elevated cortisol levels might account for the reduction in central serotonin 1A (5-hydroxytryptamine [5-HT]1A) receptor binding and function observed in patients with major depression. We tested this hypothesis by studying the effect of acute administration of hydrocortisone on 5-HT1A receptor binding potential (BP) in subjects recovered from depression.

      Methods

      We studied 14 subjects (8 male, 6 female) who had recovered from at least two episodes of major depression and had been euthymic and drug free for at least 6 months. Serotonin 1A receptor BP was measured by [11C]WAY-100635 in conjunction with positron emission tomography. Subjects were tested on two occasions in a double-blind, random-order, crossover design after administration of either hydrocortisone (100 mg orally) or placebo 12 hours previously. Positron emission tomography scans were analyzed with a region of interest analysis.

      Results

      Hydrocortisone treatment did not decrease 5-HT1A receptor BP either in the hippocampus, which was our a priori hypothesis, or in other cortical 5-HT1A regions; however, female subjects had a higher 5-HT1A receptor BP in certain brain areas compared with male subjects.

      Conclusions

      These data are consistent with an earlier study in healthy volunteers and do not support the proposal that decreased 5-HT1A receptor BP in patients with acute major depression is a consequence of cortisol hypersecretion.

      Keywords

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