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Controlling the Circadian Clock with High Temporal Resolution through Photodosing
Dušan Kolarski1, Akiko Sugiyama2, Ghislain Breton3
1Centre for Systems Chemistry , Stratingh Institute for Chemistry, University of Groningen , Nijenborgh 4 , 9747 AG , Groningen , The Netherlands.
Scientists developed a light-controllable circadian clock modifier, longdaysin, enabling precise regulation of biological timing. This breakthrough offers new avenues for understanding and treating circadian rhythm disorders.
Area of Science:
- Chronobiology
- Molecular Pharmacology
Background:
- Circadian clocks regulate essential biological processes in nearly all cells.
- Disruptions in circadian rhythms are linked to various diseases.
- Precise, inducible control over cellular clocks is needed for therapeutic strategies.
Purpose of the Study:
- To develop an innovative method for inducible circadian rhythm regulation.
- To achieve high temporal resolution in controlling cellular clock function.
Main Methods:
- Structure-guided incorporation of photoremovable protecting groups into longdaysin, a casein kinase I (CKI) inhibitor.
- Utilizing UV or visible light (400 nm) for photodeprotection.
- Assessing CKI activity and circadian period regulation in human cells, mouse tissues, and zebrafish.
Main Results:
- Achieved quantitative and light-inducible control over CKI activity.
- Demonstrated accurate regulation of the circadian period using light stimulus.
- Successfully applied the method in cellular, tissue, and whole organism models.
Conclusions:
- Photodosing offers precise temporal control over biological timing.
- This approach enables new applications in chronopharmacology for studying circadian systems.
- The developed technology holds potential for therapeutic interventions targeting circadian rhythm disorders.
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