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Related Experiment Video

Updated: Jul 9, 2026

Through-the-Wall Blood Sampling Method to Minimize Sleep Disruption in Clinical Settings

Through-the-Wall Blood Sampling Method to Minimize Sleep Disruption in Clinical Settings

Published on: June 13, 2025

[Ghrelin and sleep].

Dragan Micić, Veselinka Susić, Vladimir Kostić

Glas. Srpska Akademija Nauka I Umetnosti. Odeljenje Medicinskih Nauka

|December 12, 2007

Summary

Human sleep involves cycles of NREM and REM sleep, with distinct hormone secretion patterns. Growth hormone and cortisol/ACTH levels show reciprocal changes throughout the night, influencing sleep regulation.

Area of Science:

Endocrinology
Sleep Medicine
Neuroscience

Context:

Human sleep architecture involves distinct stages: non-rapid-eye-movement sleep (NREMS) and rapid-eye-movement sleep (REMS).
Nocturnal hormone secretion, particularly from the hypothalamo-pituitary axes, exhibits dynamic patterns throughout the sleep cycle.
Previous research suggests links between sleep stages and hormonal fluctuations, but the precise regulatory mechanisms are complex.

Purpose:

To investigate the reciprocal interactions between the hypothalamo-pituitary-somatotrophic axis (HPAS) and the hypothalamo-pituitary-adrenal axis (HPAA) during human sleep.
To explore the role of common regulatory factors influencing both electroencephalogram (EEG) changes during sleep and nocturnal hormone secretion.
To elucidate the fundamental role of growth hormone-releasing hormone (GHRH) and corticotropin-releasing hormone (CRH) in sleep regulation.

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Establishing a Device for Sleep Deprivation in Mice

Establishing a Device for Sleep Deprivation in Mice

Published on: September 22, 2023

Summary:

Human sleep is characterized by cyclical NREMS and REMS, with distinct hormonal profiles in the first and second halves of the night.
The first half of the night shows increased growth hormone (GH) and decreased ACTH/cortisol, while the second half exhibits the opposite pattern.
These findings suggest a reciprocal interaction between the HPAS and HPAA, and common regulatory factors for sleep EEG and hormone secretion, highlighting the crucial roles of GHRH and CRH.

Impact:

Provides a deeper understanding of the neuroendocrine regulation of sleep.
Identifies key hormonal interactions (GHRH and CRH) fundamental to sleep processes.
Offers potential targets for therapeutic interventions in sleep disorders and related hormonal imbalances.