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The Pineal Gland

The Pineal Gland

The pineal gland, a diminutive endocrine structure named for its pinecone-shaped appearance, is situated atop the third ventricle within the diencephalon region of the forebrain. This gland, composed of secretory cells known as pinealocytes arranged in compact cords and clusters around dense particles of calcium salts, plays a pivotal role in hormonal regulation.
The primary secretion of the pineal gland is the hormone melatonin, derived from serotonin. The concentration of melatonin in the...

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Updated: Aug 27, 2025

Human Circadian Phenotyping and Diurnal Performance Testing in the Real World

Human Circadian Phenotyping and Diurnal Performance Testing in the Real World

Published on: April 7, 2020

Detection of Melatonin in Tissue Samples.

Céline Legros¹, Jean A Boutin²

¹Eurofins Discovery, Celle Levescault, France.

Methods in Molecular Biology (Clifton, N.J.)

|September 30, 2022

Summary

This study details methods for precisely measuring melatonin levels in the brain and tissues. Accurate quantification is crucial for understanding how melatonin signaling and its variations impact biological functions.

Keywords:

Detection Dosage Melatonin Melatonin extraction RIA

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Last Updated: Aug 27, 2025

Human Circadian Phenotyping and Diurnal Performance Testing in the Real World

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Published on: April 7, 2020

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Published on: August 8, 2019

Area of Science:

Neuroscience
Biochemistry
Chronobiology

Background:

Melatonin levels exhibit diurnal variations, being higher in the brain during nighttime.
Melatonin concentration is not uniform, varying significantly across different organs and tissue sublocalizations.
Understanding these spatial and temporal variations is key to deciphering melatonin's signaling pathways.

Purpose of the Study:

To outline precise methodologies for quantifying melatonin in biological samples.
To facilitate accurate measurement of melatonin's dynamic changes within the brain and other tissues.
To support research into melatonin's signaling mechanisms and its diverse physiological roles.

Main Methods:

Detailed protocols for melatonin quantification are presented.
The chapter focuses on techniques enabling precise measurement of melatonin variations.
Emphasis is placed on methods applicable to organ and tissue sublocalizations.

Main Results:

The presented methods allow for accurate determination of melatonin quantities.
The chapter provides a framework for measuring day/night and tissue-specific variations.
These techniques are essential for studying melatonin's signaling dynamics.

Conclusions:

Precise measurement of melatonin is achievable through detailed methodologies.
Accurate quantification is vital for understanding melatonin's role in biological systems.
The chapter equips researchers with the tools to investigate melatonin signaling intricacies.