Title
An evaluation of basal hypothalamic-pituitary thyroid axis function in depression : results of a large-scaled and controlled-study An evaluation of basal hypothalamic-pituitary thyroid axis function in depression : results of a large-scaled and controlled-study
Author
Faculty/Department
Faculty of Medicine and Health Sciences
Publication type
article
Publication
Oxford ,
Subject
Human medicine
Source (journal)
Psychoneuroendocrinology. - Oxford
Volume/pages
18(1993) :8 , p. 607-620
ISSN
0306-4530
ISI
A1993MJ35200008
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
In order to evaluate the function of the hypothalamic-pituitary-thyroid (HPT)-axis in unipolar depression, the authors measured basal 0800h plasma levels of free thyroxine (FT4), free triiodothyronine (FT3), and thyroid stimulating hormone (TSH) by means of the new, ultrasensitive assays (TSH-IRMA) in 69 healthy controls, 62 minor, 101 simple major, and 57 melancholic depressed subjects. Basal HPT-axis hormone levels of almost all (96.8%) unipolar depressed patients fell within the normal, euthyroid range. None of the major depressed subjects showed subclinical hypothyroidism. It was found that 8.8% of the melancholic subjects exhibited some degree of subclinical hyperthyroidism. Basal TSH-IRMA values were significantly lower in melancholic patients than in healthy controls, minor and simple major depressed patients, and in major vs. minor depressed subjects. FT4 circulating levels were significantly higher in melancholic patients than in all other subjects. Basal TSH-IRMA and FT4 levels were significantly correlated with severity of illness. In depression, there was a significant and negative correlation between basal TSH-IRMA values and FT4 concentrations. No significant gender- or age-related differences in TSH-IRMA or thyroid hormones were detected in depression. It is argued that-in depression research-the assays of basal TSH-IRMA should replace thyrotropin releasing hormone tests.
E-info
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