Lookup NU author(s): Dr Richard Porter,
Professor Hamish McAllister-Williams,
Professor Brian Lunn,
Professor Allan Young
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5-Hydroxytryptamine(1A) (5-HT(1A)) receptors have been shown to be suppressed by corticosteroid hormones in a variety of animal experimental paradigms. It has been suggested that this effect may be central to the pathophysiology of severe clinical depressive illness, a condition in which 5-HT(1A), receptor function is reduced and corticosteroid hormones are elevated. We report the effects of acute administration of hydrocortisone in normal volunteers on a neuroendocrine model of 5-HT(1A) receptor function. Fifteen healthy male volunteers took part in a random order, double blind, placebo controlled study, in which 100 mg hydrocortisone or placebo was administered 11 h before infusion of L-tryptophan (L-TRP). Pre-treatment with hydrocortisone significantly reduced the growth hormone (GH), but not the prolactin (PRL) response to the infusion. These data are consistent with the view that acute administration of corticosteroid hormones significantly impairs 5-HT(1A) receptor mediated function in healthy human volunteers and are in line with animal studies of the effects of corticosteroid hormones on 5-HT(1A) receptors. We propose that this finding is relevant to the pathophysiological processes which cause severe depressive illness.
Author(s): Young AH; Porter RJ; McAllister-Williams RH; Lunn BS
Publication type: Article
Publication status: Published
Print publication date: 01/09/1998
ISSN (print): 0033-3158
ISSN (electronic): 1432-2072
PubMed id: 9784080
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