Related Experiment Video
Updated: May 10, 2026
06:53
Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures
Published on: November 11, 2016
A role for clock genes in sleep homeostasis
1Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland.
Current Opinion in Neurobiology
|June 13, 2013
Summary
Sleep and wakefulness are regulated by homeostatic and circadian processes. Sleep loss impacts circadian clock genes, suggesting a link between sleep, circadian rhythms, and metabolic health.
Area of Science:
- Chronobiology
- Sleep Science
- Molecular Biology
Background:
- Sleep and wakefulness are governed by homeostatic and circadian regulatory processes.
- Circadian regulation involves molecular pathways for physiological time-keeping.
- Homeostatic regulation tracks sleep-wake history and the need for sleep.
Purpose of the Study:
- To review the evidence for clock gene involvement in sleep homeostasis.
- To explore the molecular interplay between circadian rhythms and sleep regulation.
Main Methods:
- Analysis of sleep patterns in mice and flies lacking core circadian clock gene proteins.
- Investigation of mRNA levels and DNA-binding of circadian transcriptional regulators following sleep loss in mice.
Main Results:
- Disruption of circadian rhythms due to clock gene deficiency also affects sleep homeostasis.
- Sleep loss alters mRNA levels and DNA-binding of key circadian transcriptional regulators in the mouse brain.
- This molecular interaction may explain shared pathologies between inadequate sleep and circadian disruption.
Conclusions:
- Clock genes play a crucial role in regulating sleep homeostasis, not just circadian rhythms.
- Sleep loss directly impacts the molecular machinery of the circadian system.
- Understanding this interplay is vital for addressing metabolic pathologies linked to sleep and circadian disruption.
More Related Videos
Related Concept Videos
02:19Circadian 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,...
02:19Circadian 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,...
02:45Biological Clocks and Seasonal Responses
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
01:11Understanding 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...
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...
01:24Sleep-Wake Cycles
Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
01:19Management 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...