Dexamethasone increases plasma HVA but not MHPG in normal humans

Several recent studies in animals and man indicate that corticosteroids may alter catecholaminergic activity in both the peripheral and central nervous systems. We administered 1 mg of the synthetic glucocorticoid, dexamethasone, to 12 drug-free healthy volunteers and measured plasma homovanillic ac...

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Bibliographic Details
Published in:Psychiatry research 1985-10, Vol.16 (2), p.101-109
Main Authors: Wolkowitz, Owen M., Sutton, Mary E., Doran, Allen R., Labarca, Rodrigo, Roy, Alec, Thomas, John W., Pickar, David, Paul, Steven M.
Format: Article
Language:English
Subjects:
3-methoxy-4- hydroxyphenylglycol
Adult
Biological and medical sciences
Corticosteroids
dexamethasone
Dexamethasone - pharmacology
Dopamine - metabolism
Female
Glycols - blood
homovanillic acid
Homovanillic Acid - blood
Humans
Hydrocortisone - blood
Male
Medical sciences
Methoxyhydroxyphenylglycol - blood
Miscellaneous
prolactin
Prolactin - blood
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Techniques and methods
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Summary:Several recent studies in animals and man indicate that corticosteroids may alter catecholaminergic activity in both the peripheral and central nervous systems. We administered 1 mg of the synthetic glucocorticoid, dexamethasone, to 12 drug-free healthy volunteers and measured plasma homovanillic acid (HVA) and 3-methoxy-4-hydroxyphenylglycol (MHPG). Dexamethasone was administered at 11 p.m. and blood was collected at 4 p.m. on the preceding and subsequent days. Dexamethasone administration resulted in a significant increase in plasma HVA but did not consistently affect MHPG. All subjects showed a suppression of serum cortisol to values < 5 μg/d1 while prolactin levels were unaltered. In an additional group of nine volunteers, we administered 2 mg of dexamethasone and observed a similar increase in plasma HVA without change in plasma MHPG, indicating a selective effect on dopamine metabolism. Implications of these findings for an understanding of the neurochemical and behavioral changes seen with steroid administration and in explaining previous results on plasma MHPG/HVA ratios in delusional depression are discussed.
ISSN:0165-1781
1872-7123
DOI:10.1016/0165-1781(85)90003-4