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Updated: May 24, 2026
11:20
Making, Testing, and Using Potassium Ion Selective Microelectrodes in Tissue Slices of Adult Brain
Published on: May 7, 2018
Intracellular potassium levels orchestrate circadian rhythmicity and cell division
Sergio Gil Rodríguez1, Louise L Hansen1, Olivia J P Fraser1
1School of Biological Sciences, University of Edinburgh, Max Born Crescent, Edinburgh, UK.
Nature Communications
|May 22, 2026
Summary
Intracellular potassium rhythms regulate cellular circadian rhythms and cell cycle timing. These findings reveal potassium
Area of Science:
- Cell Biology
- Chronobiology
- Biochemistry
Background:
- Circadian rhythms are essential biological processes influencing health.
- Disruptions in circadian rhythms are linked to various diseases.
- Previous work identified circadian oscillations in intracellular potassium.
Purpose of the Study:
- To investigate the role of intracellular potassium in regulating cellular circadian rhythms.
- To determine if potassium rhythms link the cell cycle to the circadian clock.
Main Methods:
- Utilized divergent eukaryotic cell types.
- Measured intracellular potassium concentrations.
- Analyzed clock gene expression and cell proliferation patterns.
Main Results:
- Intracellular potassium levels regulate the period and phase of clock gene expression.
- Potassium levels are essential for circadian regulation of cell cycle progression.
- Manipulating potassium inhibits cell proliferation in a circadian phase-dependent manner.
Conclusions:
- Intracellular potassium is a bona fide regulator of cellular circadian rhythms.
- Circadian potassium rhythms are crucial for coupling cell proliferation to the circadian cycle.
- Potassium rhythms are a primary factor linking cellular and circadian cycles in eukaryotes.
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