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Hyperthyroidism II: Pathophysiology

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Updated: Jun 16, 2026

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder

Published on: April 26, 2024

Thyroid axis activity and suicidal behavior in depressed patients.

Fabrice Duval¹, Marie-Claude Mokrani, Felix Gonzalez Lopera

¹Centre Hospitalier, Rouffach, France. f.duval@ch-rouffach.fr

Psychoneuroendocrinology

|February 5, 2010

Summary

Depression is linked to hypothalamic-pituitary thyroid (HPT) axis dysregulation. Patients with a history of suicidal behavior showed altered thyroid hormone levels and responses, indicating HPT axis dysfunction.

Related Experiment Videos

Last Updated: Jun 16, 2026

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder

Published on: April 26, 2024

Area of Science:

Neuroendocrinology
Psychiatry
Clinical Research

Background:

Suicidal behavior is a significant concern in major depressive disorder.
The hypothalamic-pituitary-thyroid (HPT) axis plays a crucial role in mood regulation.
Previous studies suggest potential links between HPT axis activity and suicidal behavior in depressed individuals.

Purpose of the Study:

To investigate the relationship between suicidal behavior and hypothalamic-pituitary-thyroid (HPT) axis activity in major depressed patients.
To compare HPT axis parameters between depressed patients with and without a history of suicidal behavior, and with healthy controls.

Main Methods:

Serum levels of thyrotropin (TSH), free thyroxine (FT4), and free triiodothyronine (FT3) were measured.
Thyrotropin-releasing hormone (TRH) challenges were administered at 0800 h and 2300 h.
95 medication-free, euthyroid, major depressed inpatients and 44 healthy controls were included.

Main Results:

Patients with a positive suicide history (PSH) exhibited lower basal FT4 levels compared to controls.
TSH responses to TRH (DeltaTSH) were blunted in patients with a negative suicide history (NSH) but not in PSH.
Both PSH and NSH groups showed reduced DeltaDeltaTSH values, indicating altered diurnal HPT axis patterns. Recent suicide attempters showed lower basal FT4 and blunted TSH responses.

Conclusions:

The study indicates that varying degrees of HPT axis dysregulation are associated with a history of suicidal behavior in depressed patients.
Specific alterations in basal FT4 and TSH response dynamics suggest a link between HPT axis function and suicidal tendencies.
These findings highlight the potential role of neuroendocrine factors in the pathophysiology of suicidal behavior in depression.