Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

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,...
Biological Clocks and Seasonal Responses02:45

Biological 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.
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...
Factors Affecting Drug Biotransformation: Biological01:19

Factors Affecting Drug Biotransformation: Biological

Biological factors significantly impact drug metabolism, influencing drug clearance, efficacy, and potential toxicity.
Species differences: Variations in enzyme systems across species can cause disparities in drug metabolism. For instance, humans may metabolize certain drugs faster than rodents, altering therapeutic effects.
Strain differences: Genetic variations within a species can result in differing enzyme activity, impacting drug response and toxicity. For example, some mouse strains may...
Positive Regulator Molecules02:39

Positive Regulator Molecules

Mitotic cell division results in daughter cells that exactly resemble the parent cell. However, errors in the DNA replication or distribution of genetic material may lead to genetic mutations that may be passed down to every new cell formed from the resulting abnormal cell. Propagation of such mutant cells is restricted through checkpoint mechanisms present at different stages of the cell cycle. These checkpoints involve regulator molecules that either promote or demote cell cycle events.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Cryptochrome Loss Drives COPD-like Lung Pathology through Disrupted Alveolar Epithelial Proliferation and Immune Homeostasis.

bioRxiv : the preprint server for biology·2026
Same author

FBXL21 regulates diurnal proteostasis and stress response by targeting DNAJB6 and client proteins.

bioRxiv : the preprint server for biology·2026
Same author

DHHC3-dependent S-Acylation of CRY1 regulates its subcellular localization and repressor function in the circadian clock.

bioRxiv : the preprint server for biology·2026
Same author

Time-restricted feeding extends healthspan in both sexes and lifespan in male C57BL/6 J mice.

Nature aging·2026
Same author

Not all gut cellular circadian oscillators are food entrainable.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Circadian Alignment Through Time-Restricted Feeding: Implications for Health and Longevity.

Annual review of nutrition·2026

Related Experiment Video

Updated: May 16, 2026

Rapid Analysis of Circadian Phenotypes in Arabidopsis Protoplasts Transfected with a Luminescent Clock Reporter
07:42

Rapid Analysis of Circadian Phenotypes in Arabidopsis Protoplasts Transfected with a Luminescent Clock Reporter

Published on: September 17, 2016

Small molecule modifiers of circadian clocks.

Zheng Chen1, Seung-Hee Yoo, Joseph S Takahashi

  • 1Department of Biochemistry and Molecular Biology, University of Texas Health Science Center at Houston, 6431 Fannin St., Houston, TX 77030, USA, Zheng.chen.1@uth.tmc.edu

Cellular and Molecular Life Sciences : CMLS
|November 20, 2012
PubMed
Summary

Synthetic compounds offer new ways to understand and treat circadian clock disorders. These small molecules can modify the timing and strength of biological rhythms, aiding both research and medicine.

More Related Videos

In Vitro Bioluminescence Assay to Characterize Circadian Rhythm in Mammary Epithelial Cells
11:56

In Vitro Bioluminescence Assay to Characterize Circadian Rhythm in Mammary Epithelial Cells

Published on: September 28, 2017

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures
06:53

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures

Published on: November 11, 2016

Related Experiment Videos

Last Updated: May 16, 2026

Rapid Analysis of Circadian Phenotypes in Arabidopsis Protoplasts Transfected with a Luminescent Clock Reporter
07:42

Rapid Analysis of Circadian Phenotypes in Arabidopsis Protoplasts Transfected with a Luminescent Clock Reporter

Published on: September 17, 2016

In Vitro Bioluminescence Assay to Characterize Circadian Rhythm in Mammary Epithelial Cells
11:56

In Vitro Bioluminescence Assay to Characterize Circadian Rhythm in Mammary Epithelial Cells

Published on: September 28, 2017

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures
06:53

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures

Published on: November 11, 2016

Area of Science:

  • Chronobiology
  • Molecular Biology
  • Pharmacology

Background:

  • Circadian clocks regulate daily physiological and behavioral rhythms.
  • Recent research focuses on molecules that modify clock function.
  • Small molecule modifiers are key tools for studying clock biology.

Purpose of the Study:

  • To review synthetic compounds that modify circadian clock properties.
  • To emphasize the mammalian circadian clock.
  • To discuss applications in basic research and translational medicine.

Main Methods:

  • Literature review of synthetic compounds affecting circadian clocks.
  • Focus on compounds modifying period, phase, and amplitude.
  • Emphasis on mammalian clock systems.

Main Results:

  • Synthetic small molecules can alter circadian clock parameters.
  • These compounds are valuable for understanding clock mechanisms.
  • Potential therapeutic applications for circadian rhythm disorders exist.

Conclusions:

  • Synthetic small molecule modifiers are crucial for advancing circadian clock research.
  • These compounds hold promise for developing treatments for diseases linked to circadian disruption.
  • Exploiting these modifiers can bridge basic science and clinical applications.