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TRH: behavioral and endocrine effects in man.

¹Vanderbilt University Medical Center, Nashville, Tennessee.

Progress in Neuro-Psychopharmacology & Biological Psychiatry

|January 1, 1988

Summary

The thyrotropin-releasing hormone (TRH) shows behavioral benefits but lacks disease specificity. While TRH stimulates thyroid-stimulating hormone (TSH), blunted responses in depression are not unique to this condition.

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Area of Science:

Neuroendocrinology
Psychiatry
Pharmacology

Background:

The tripeptide thyrotropin-releasing hormone (TRH) exhibits diverse biological activities in humans and animals.
TRH's effects on well-being, motivation, and relaxation have been noted in both healthy individuals and patients with psychiatric and neurological disorders.

Purpose of the Study:

To review the behavioral and endocrinological effects of TRH.
To discuss the relevance of TRH's actions in psychiatry and psychoneuroendocrinology.

Main Methods:

Review of existing literature on TRH's biological activities.
Analysis of behavioral observations and endocrinological responses to TRH administration.
Examination of TRH's impact on patients with psychiatric and neurological conditions.

Main Results:

Behaviorally, TRH enhances well-being, motivation, relaxation, and coping capacity, but these effects are not disease-specific, limiting its therapeutic use.
Endocrinologically, TRH stimulates TSH release, with blunted responses observed in about 30% of major depression patients.
TSH blunting is not exclusive to depression and occurs in various other psychiatric conditions.

Conclusions:

TRH's broad behavioral effects are not specific enough for targeted psychiatric treatment.
The observed TSH blunting in response to TRH is a non-specific finding across several psychiatric disorders.
The review highlights the complex role and limited specificity of TRH in psychiatric and psychoneuroendocrine contexts.

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