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Function of hypothalamo-pituitary thyroid axis in depressed patients.
Folia Psychiatrica Et Neurologica Japonica
|January 1, 1977
Summary
Thyroid dysfunction is linked to depression. Abnormal thyroid-stimulating hormone (TSH) responses to thyrotropin-releasing hormone (TRH) were observed in depressed patients, suggesting a role for the hypothalamo-pituitary thyroid axis in depression.
Area of Science:
- Neuroendocrinology
- Psychiatry
- Thyroid Research
Background:
- The hypothalamo-pituitary thyroid axis regulates thyroid function.
- Depression is a complex mood disorder with potential neuroendocrine links.
Purpose of the Study:
- To investigate the thyroid-stimulating hormone (TSH) response to thyrotropin-releasing hormone (TRH) in patients with depression.
- To explore the relationship between thyroid hormone levels and TRH response in depression.
Main Methods:
- Assessed TSH response to TRH in 51 depressed patients.
- Measured basal T3 levels and T3 response to TRH.
- Compared responses in patients with abnormal TSH responses to normal subjects.
Main Results:
- 19 out of 51 depressed patients exhibited abnormal TSH responses (exaggerated, diminished, or delayed).
- Patients with diminished or delayed responses showed lower basal T3 and blunted T3 response to TRH compared to controls.
- Abnormalities in TSH and T3 dynamics were associated with depression.
Conclusions:
- Dysfunction of the hypothalamo-pituitary thyroid axis is implicated in the pathogenesis of depression.
- Altered TSH and T3 responses may serve as biomarkers for certain depressive states.