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Updated: Sep 23, 2025

Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures
Published on: November 11, 2016
Time to target the circadian clock for drug discovery
Emil Sjulstok Rasmussen1, Joseph S Takahashi2, Carla B Green1
1Department of Neuroscience, University of Texas Southwestern Medical Center, Dallas, TX, USA.
Abstract:
The circadian clock is an intracellular timekeeping device that drives daily rhythms in diverse and extensive processes throughout the body. The clock mechanism comprises a core transcription/translation negative feedback loop that is modulated by a complex set of additional interlocking feedback loops. Pharmacological manipulation of the clock may be valuable for treating many maladies including jet lag, shift work and related sleep disorders, various metabolic diseases, and cancer. We review recent identification of small-molecule clock modulators and discuss the biochemical features of the core clock that may be amenable to future drug discovery.
Insights
The body's internal circadian clock regulates daily rhythms and can be targeted by drugs. New small-molecule modulators offer potential treatments for sleep disorders, metabolic diseases, and cancer.
Area of Science:
- Biochemistry
- Chronobiology
- Pharmacology
Background:
- The circadian clock is an intracellular timekeeping mechanism essential for daily physiological rhythms.
- It operates via a core transcription/translation feedback loop, influenced by additional regulatory loops.
- Disruptions to the circadian clock are linked to various health issues.
Purpose of the Study:
- To review recent advancements in identifying small-molecule modulators of the circadian clock.
- To discuss the biochemical characteristics of the core clock relevant to drug discovery.
- To explore the therapeutic potential of targeting the circadian clock for various diseases.
Main Methods:
- Literature review of recent studies on small-molecule clock modulators.
- Analysis of the biochemical mechanisms underlying the core circadian clock.
- Discussion of drug discovery strategies targeting clock components.
Main Results:
- Recent identification of novel small-molecule compounds that modulate circadian clock function.
- Elucidation of key biochemical targets within the core clock mechanism.
- Demonstration of the potential for pharmacological intervention in clock-related disorders.
Conclusions:
- Small-molecule modulators represent a promising avenue for treating circadian rhythm-related disorders.
- Targeting the core clock mechanism offers therapeutic potential for metabolic diseases, cancer, and sleep disturbances.
- Further drug discovery efforts focused on clock biochemistry are warranted.
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