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Related Concept Videos

The Pineal Gland01:02

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...
Circadian Rhythms and Gene Regulation02:19

Circadian Rhythms and Gene Regulation

The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent years,...
Circadian Rhythms and Gene Regulation02:19

Circadian Rhythms and Gene Regulation

The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent years,...
Understanding Sleep01:11

Understanding Sleep

Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
Management of Insomnia01:19

Management of Insomnia

The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...

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Related Experiment Video

Updated: Jun 12, 2026

Human Primary Trophoblast Cell Culture Model to Study the Protective Effects of Melatonin Against Hypoxia/reoxygenation-induced Disruption
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Human Primary Trophoblast Cell Culture Model to Study the Protective Effects of Melatonin Against Hypoxia/reoxygenation-induced Disruption

Published on: July 30, 2016

Melatonin signaling and cell protection function.

Francesca Luchetti1, Barbara Canonico, Michele Betti

  • 1Dipartimento di Scienze Dell’Uomo dell’Ambiente e della Natura, Università degli Studi di Urbino Carlo Bo, Urbino, Italy.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
|June 11, 2010
PubMed
Summary
This summary is machine-generated.

Melatonin, a pineal gland hormone, offers cell protection and survival benefits beyond circadian rhythm regulation. It activates antioxidant and detoxification pathways, enhancing cellular defense against various harmful stimuli.

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Area of Science:

  • Endocrinology
  • Cell Biology
  • Biochemistry

Background:

  • Melatonin, primarily known for circadian rhythm regulation, exhibits diverse biological functions in peripheral tissues.
  • It acts as a paracrine, intracrine, and autocrine agent, promoting cell protection and survival.
  • These effects are mediated through both receptor-dependent and -independent pathways.

Purpose of the Study:

  • To review the molecular mechanisms underlying melatonin's cell protection and survival functions.
  • To explore its role in controlling detoxification and stress response genes.
  • To discuss its impact on mitochondrial function and signaling pathways.

Main Methods:

  • Literature review of in vitro and in vivo studies on melatonin signaling.
  • Analysis of molecular pathways involved in cell protection, including redox signaling.
  • Examination of melatonin's interaction with transcription factors like NF-κB, AP-1, and Nrf2.
  • Investigation of mitochondrial signaling, including reactive oxygen species production and Bcl2 activation.
  • Exploration of upstream signaling components such as calmodulin and MAPKs (ERK1/2).

Main Results:

  • Melatonin enhances cellular defense against xenobiotics and endobiotics via receptor-dependent and -independent mechanisms.
  • It modulates redox-sensitive signaling, controlling transcription factors (NF-κB, AP-1, Nrf2) to upregulate antioxidant and detoxification genes.
  • Melatonin improves the glutathione system and protects mitochondria by reducing reactive oxygen species and activating antiapoptotic pathways (Bcl2).
  • Calmodulin and MAPKs (ERK1/2) are identified as key upstream components in melatonin's mitochondrial signaling pathway.

Conclusions:

  • Melatonin is a potent prosurvival factor with pleiotropic effects extending beyond its endocrine functions.
  • Its protective role involves intricate molecular signaling networks controlling cellular stress responses and mitochondrial integrity.
  • Understanding these pathways offers insights into therapeutic strategies involving melatonin for various conditions.